OpenGLRenderer.cpp revision 5b3b35296e8b2c8d3f07d32bb645d5414db41a1d
14f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani/* 24f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * Copyright (C) 2010 The Android Open Source Project 34f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * 44f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * Licensed under the Apache License, Version 2.0 (the "License"); 54f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * you may not use this file except in compliance with the License. 64f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * You may obtain a copy of the License at 74f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * 84f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * http://www.apache.org/licenses/LICENSE-2.0 94f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * 104f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * Unless required by applicable law or agreed to in writing, software 114f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * distributed under the License is distributed on an "AS IS" BASIS, 124f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * See the License for the specific language governing permissions and 144f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * limitations under the License. 154f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani */ 164f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 174f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#define LOG_TAG "OpenGLRenderer" 184f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 196f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki#include <stdlib.h> 2043204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki#include <stdint.h> 216f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki#include <sys/types.h> 2253fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy 234f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#include <SkCanvas.h> 244f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#include <SkTypeface.h> 254f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 2653fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy#include <utils/Log.h> 27772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy#include <utils/StopWatch.h> 284f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 294f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#include <ui/Rect.h> 3053fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy 314dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki#include "OpenGLRenderer.h" 3253fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy 33cd65448ccd13c4c2d0fe9e9623fec3a898ab9372Jeff Sharkeynamespace android { 346f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onukinamespace uirenderer { 356cbc2fec91c8eae62b0ed578523af4f9765f9c17Sunny Goyal 364f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 376f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// Defines 386f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki/////////////////////////////////////////////////////////////////////////////// 396f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 404f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#define RAD_TO_DEG (180.0f / 3.14159265f) 414f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#define MIN_ANGLE 0.001f 42466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 434f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani// TODO: This should be set in properties 444f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#define ALPHA_THRESHOLD (0x7f / PANEL_BIT_DEPTH) 45c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki 464f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 475504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki// Globals 484f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 494f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 504f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani/** 514f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * Structure mapping Skia xfermodes to OpenGL blending factors. 52466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy */ 53932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasanistruct Blender { 544f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani SkXfermode::Mode mode; 554f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani GLenum src; 567a6a05f0ccc8c57496d0a1e2b0882ab7de3175e5Makoto Onuki GLenum dst; 574f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani}; // struct Blender 58c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki 596f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// In this array, the index of each Blender equals the value of the first 606f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// entry. For instance, gBlends[1] == gBlends[SkXfermode::kSrc_Mode] 61df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanistatic const Blender gBlends[] = { 624f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kClear_Mode, GL_ZERO, GL_ZERO }, 63ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki { SkXfermode::kSrc_Mode, GL_ONE, GL_ZERO }, 644f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kDst_Mode, GL_ZERO, GL_ONE }, 654f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kSrcOver_Mode, GL_ONE, GL_ONE_MINUS_SRC_ALPHA }, 664f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kDstOver_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE }, 674f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kSrcIn_Mode, GL_DST_ALPHA, GL_ZERO }, 686f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki { SkXfermode::kDstIn_Mode, GL_ZERO, GL_SRC_ALPHA }, 694f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kSrcOut_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ZERO }, 70df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kDstOut_Mode, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA }, 71df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kSrcATop_Mode, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA }, 72df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kDstATop_Mode, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA }, 734f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani { SkXfermode::kXor_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA } 744f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani}; 75df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 76df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani// This array contains the swapped version of each SkXfermode. For instance 774f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani// this array's SrcOver blending mode is actually DstOver. You can refer to 784f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani// createLayer() for more information on the purpose of this array. 794f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasanistatic const Blender gBlendsSwap[] = { 80df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kClear_Mode, GL_ZERO, GL_ZERO }, 81df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kSrc_Mode, GL_ZERO, GL_ONE }, 82df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kDst_Mode, GL_ONE, GL_ZERO }, 83df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani { SkXfermode::kSrcOver_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE }, 844dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kDstOver_Mode, GL_ONE, GL_ONE_MINUS_SRC_ALPHA }, 854dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kSrcIn_Mode, GL_ZERO, GL_SRC_ALPHA }, 864dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kDstIn_Mode, GL_DST_ALPHA, GL_ZERO }, 874dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kSrcOut_Mode, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA }, 884dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kDstOut_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ZERO }, 894dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kSrcATop_Mode, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA }, 904dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kDstATop_Mode, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA }, 914dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki { SkXfermode::kXor_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA } 924dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki}; 934dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 947a6a05f0ccc8c57496d0a1e2b0882ab7de3175e5Makoto Onukistatic const GLenum gTextureUnits[] = { 956f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki GL_TEXTURE0, 96df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani GL_TEXTURE1, 97df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani GL_TEXTURE2 98df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani}; 99df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 100df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 1016f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// Constructors/destructor 102df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 103df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 104df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith YamasaniOpenGLRenderer::OpenGLRenderer(): mCaches(Caches::getInstance()) { 1056f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki mShader = NULL; 106df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mColorFilter = NULL; 107c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki mHasShadow = false; 108c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki 109df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani memcpy(mMeshVertices, gMeshVertices, sizeof(gMeshVertices)); 110df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 111df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mFirstSnapshot = new Snapshot; 112df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 1136f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 1146f7362d92573e4ae693bc513dca586d6a4eb087bMakoto OnukiOpenGLRenderer::~OpenGLRenderer() { 1156f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki // The context has already been destroyed at this point, do not call 116c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki // GL APIs. All GL state should be kept in Caches.h 117df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 118df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 1192d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki/////////////////////////////////////////////////////////////////////////////// 1202d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki// Setup 1212d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki/////////////////////////////////////////////////////////////////////////////// 1222d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki 1232d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onukivoid OpenGLRenderer::setViewport(int width, int height) { 124ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki glViewport(0, 0, width, height); 125ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mOrthoMatrix.loadOrtho(0, width, height, 0, -1, 1); 126ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 127ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mWidth = width; 128ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mHeight = height; 129ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 130ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mFirstSnapshot->height = height; 131ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mFirstSnapshot->viewport.set(0, 0, width, height); 132ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 133ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mDirtyClip = false; 134ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki} 135ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 136ac21497f174504472e92b99500709518b8ab2d71Makoto Onukivoid OpenGLRenderer::prepare(bool opaque) { 137ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki mSnapshot = new Snapshot(mFirstSnapshot, 138ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki SkCanvas::kMatrix_SaveFlag | SkCanvas::kClip_SaveFlag); 1392d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki mSaveCount = 1; 1402d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki 1412d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki glViewport(0, 0, mWidth, mHeight); 1422d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki 143df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glDisable(GL_DITHER); 144df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 145df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (!opaque) { 146df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glDisable(GL_SCISSOR_TEST); 147df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 1484dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki glClear(GL_COLOR_BUFFER_BIT); 1494dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki glEnable(GL_SCISSOR_TEST); 1505ba0d3e3a3035b67d2ce3a59975145b1e0061ef4Makoto Onuki } else { 151df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glEnable(GL_SCISSOR_TEST); 152932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani glScissor(0, 0, mWidth, mHeight); 153df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani dirtyClip(); 154932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani } 155df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 156df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mSnapshot->setClip(0.0f, 0.0f, mWidth, mHeight); 157df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 158df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 159df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::finish() { 160df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#if DEBUG_OPENGL 161df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani GLenum status = GL_NO_ERROR; 1624dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki while ((status = glGetError()) != GL_NO_ERROR) { 1634dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki LOGD("GL error from OpenGLRenderer: 0x%x", status); 1644f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani } 1654f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani#endif 1664f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani} 167df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 168df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::acquireContext() { 169df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (mCaches.currentProgram) { 170df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (mCaches.currentProgram->isInUse()) { 171df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mCaches.currentProgram->remove(); 172df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mCaches.currentProgram = NULL; 173df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 174df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 175df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mCaches.unbindMeshBuffer(); 176df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 177df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 178df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::releaseContext() { 179df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glViewport(0, 0, mSnapshot->viewport.getWidth(), mSnapshot->viewport.getHeight()); 180df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 181df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glEnable(GL_SCISSOR_TEST); 1824f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani dirtyClip(); 1834f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 1844f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani glDisable(GL_DITHER); 185df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 186df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glBindFramebuffer(GL_FRAMEBUFFER, 0); 187df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); 188df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 189c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki mCaches.blend = true; 190932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani glEnable(GL_BLEND); 1914f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani glBlendFunc(mCaches.lastSrcMode, mCaches.lastDstMode); 192df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glBlendEquation(GL_FUNC_ADD); 193df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 194df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 195df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 196932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani// State management 197df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 1984f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 199df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasaniint OpenGLRenderer::getSaveCount() const { 2004f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani return mSaveCount; 2014f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani} 202df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 203df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasaniint OpenGLRenderer::save(int flags) { 204df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani return saveSnapshot(flags); 205df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 206df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 207df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::restore() { 208df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (mSaveCount > 1) { 209df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani restoreSnapshot(); 2104f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani } 2114f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani} 2124f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 213df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::restoreToCount(int saveCount) { 214df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (saveCount < 1) saveCount = 1; 215df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 216ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki while (mSaveCount > saveCount) { 217abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki restoreSnapshot(); 218abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki } 219abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki} 220abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 221ac21497f174504472e92b99500709518b8ab2d71Makoto Onukiint OpenGLRenderer::saveSnapshot(int flags) { 222cea2978737146485b88f06b24b5df5656f9586e1Alexandra Gherghina mSnapshot = new Snapshot(mSnapshot, flags); 223df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani return mSaveCount++; 2244f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani} 225ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 226df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanibool OpenGLRenderer::restoreSnapshot() { 227df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; 228df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani bool restoreLayer = mSnapshot->flags & Snapshot::kFlagIsLayer; 229df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani bool restoreOrtho = mSnapshot->flags & Snapshot::kFlagDirtyOrtho; 230df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 231df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani sp<Snapshot> current = mSnapshot; 232df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani sp<Snapshot> previous = mSnapshot->previous; 233df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 234df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (restoreOrtho) { 235ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki Rect& r = previous->viewport; 236df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glViewport(r.left, r.top, r.right, r.bottom); 237cea2978737146485b88f06b24b5df5656f9586e1Alexandra Gherghina mOrthoMatrix.load(current->orthoMatrix); 2384f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani } 2397a6a05f0ccc8c57496d0a1e2b0882ab7de3175e5Makoto Onuki 2407a6a05f0ccc8c57496d0a1e2b0882ab7de3175e5Makoto Onuki mSaveCount--; 2416f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki mSnapshot = previous; 2426f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 2433ee7f71d5f1dc018fdafee9d890290909ad299dfMakoto Onuki if (restoreLayer) { 2448a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey composeLayer(current, previous); 2458a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey } 2463ee7f71d5f1dc018fdafee9d890290909ad299dfMakoto Onuki 2473ee7f71d5f1dc018fdafee9d890290909ad299dfMakoto Onuki if (restoreClip) { 2486f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki dirtyClip(); 2496f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki } 2506f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 2516f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki return restoreClip; 2526f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki} 2536f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 2546f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki/////////////////////////////////////////////////////////////////////////////// 2556f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// Layers 256df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/////////////////////////////////////////////////////////////////////////////// 257df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 258df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasaniint OpenGLRenderer::saveLayer(float left, float top, float right, float bottom, 259df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani SkPaint* p, int flags) { 260abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki const GLuint previousFbo = mSnapshot->fbo; 261abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki const int count = saveSnapshot(flags); 262abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 263abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki int alpha = 255; 264ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki SkXfermode::Mode mode; 265df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 266abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki if (p) { 267df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani alpha = p->getAlpha(); 268df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (!mCaches.extensions.hasFramebufferFetch()) { 269ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); 270df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (!isMode) { 2714f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani // Assume SRC_OVER 2724f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani mode = SkXfermode::kSrcOver_Mode; 273df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 2746cbc2fec91c8eae62b0ed578523af4f9765f9c17Sunny Goyal } else { 275df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mode = getXfermode(p->getXfermode()); 276df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 277df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } else { 2786cbc2fec91c8eae62b0ed578523af4f9765f9c17Sunny Goyal mode = SkXfermode::kSrcOver_Mode; 279df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 280cea2978737146485b88f06b24b5df5656f9586e1Alexandra Gherghina 281df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (!mSnapshot->previous->invisible) { 282df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani createLayer(mSnapshot, left, top, right, bottom, alpha, mode, flags, previousFbo); 283df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 284df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 285df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani return count; 286cd65448ccd13c4c2d0fe9e9623fec3a898ab9372Jeff Sharkey} 2878a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey 2888a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkeyint OpenGLRenderer::saveLayerAlpha(float left, float top, float right, float bottom, 2898a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey int alpha, int flags) { 2906cbc2fec91c8eae62b0ed578523af4f9765f9c17Sunny Goyal if (alpha >= 255 - ALPHA_THRESHOLD) { 291df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani return saveLayer(left, top, right, bottom, NULL, flags); 292df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } else { 293df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani SkPaint paint; 29453fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy paint.setAlpha(alpha); 29553fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy return saveLayer(left, top, right, bottom, &paint, flags); 296df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 29745d3e977487da262a58bbfc5650c99a2d94aba9fSunny Goyal} 298df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 299df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani/** 300df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * Layers are viewed by Skia are slightly different than layers in image editing 301df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * programs (for instance.) When a layer is created, previously created layers 302df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * and the frame buffer still receive every drawing command. For instance, if a 303cea2978737146485b88f06b24b5df5656f9586e1Alexandra Gherghina * layer is created and a shape intersecting the bounds of the layers and the 304df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * framebuffer is draw, the shape will be drawn on both (unless the layer was 305df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * created with the SkCanvas::kClipToLayer_SaveFlag flag.) 30645d3e977487da262a58bbfc5650c99a2d94aba9fSunny Goyal * 30745d3e977487da262a58bbfc5650c99a2d94aba9fSunny Goyal * A way to implement layers is to create an FBO for each layer, backed by an RGBA 3088a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * texture. Unfortunately, this is inefficient as it requires every primitive to 3098a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * be drawn n + 1 times, where n is the number of active layers. In practice this 3108a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * means, for every primitive: 311df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * - Switch active frame buffer 312df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * - Change viewport, clip and projection matrix 313df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * - Issue the drawing 31453fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy * 31553fa4ec7f466e70fe3e33d15c4abfc9bb557eb10Kenny Guy * Switching rendering target n + 1 times per drawn primitive is extremely costly. 316df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * To avoid this, layers are implemented in a different way here, at least in the 317df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * general case. FBOs are used, as an optimization, when the "clip to layer" flag 318df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * is set. When this flag is set we can redirect all drawing operations into a 319df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * single FBO. 320df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * 321df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * This implementation relies on the frame buffer being at least RGBA 8888. When 322df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * a layer is created, only a texture is created, not an FBO. The content of the 3234f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * frame buffer contained within the layer's bounds is copied into this texture 324df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * using glCopyTexImage2D(). The layer's region is then cleared(1) in the frame 325df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * buffer and drawing continues as normal. This technique therefore treats the 326df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * frame buffer as a scratch buffer for the layers. 327cd65448ccd13c4c2d0fe9e9623fec3a898ab9372Jeff Sharkey * 3288a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * To compose the layers back onto the frame buffer, each layer texture 3298a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * (containing the original frame buffer data) is drawn as a simple quad over 3308a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey * the frame buffer. The trick is that the quad is set as the composition 331df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * destination in the blending equation, and the frame buffer becomes the source 332df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * of the composition. 333df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * 334df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * Drawing layers with an alpha value requires an extra step before composition. 3354f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * An empty quad is drawn over the layer's region in the frame buffer. This quad 3364f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani * is drawn with the rgba color (0,0,0,alpha). The alpha value offered by the 337df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani * quad is used to multiply the colors in the frame buffer. This is achieved by 338772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * changing the GL blend functions for the GL_FUNC_ADD blend equation to 339772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * GL_ZERO, GL_SRC_ALPHA. 340772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * 341772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * Because glCopyTexImage2D() can be slow, an alternative implementation might 342772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * be use to draw a single clipped layer. The implementation described above 343772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * is correct in every case. 344772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * 345772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * (1) The frame buffer is actually not cleared right away. To allow the GPU 346772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * to potentially optimize series of calls to glCopyTexImage2D, the frame 347772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * buffer is left untouched until the first drawing operation. Only when 348772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy * something actually gets drawn are the layers regions cleared. 349772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy */ 350772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guybool OpenGLRenderer::createLayer(sp<Snapshot> snapshot, float left, float top, 351772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy float right, float bottom, int alpha, SkXfermode::Mode mode, 352772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy int flags, GLuint previousFbo) { 353772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy LAYER_LOGD("Requesting layer %.2fx%.2f", right - left, bottom - top); 354772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy LAYER_LOGD("Layer cache size = %d", mCaches.layerCache.getSize()); 355772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 3562d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki const bool fboLayer = flags & SkCanvas::kClipToLayer_SaveFlag; 357abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 358abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki // Window coordinates of the layer 359abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki Rect bounds(left, top, right, bottom); 360abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki if (fboLayer) { 3612d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki // Clear the previous layer regions before we change the viewport 362abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki clearLayerRegions(); 3632d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki } else { 364d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki mSnapshot->transform->mapRect(bounds); 365d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki 3662d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki // Layers only make sense if they are in the framebuffer's bounds 3672d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki bounds.intersect(*snapshot->clipRect); 3686f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 3696f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki // We cannot work with sub-pixels in this case 3706f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki bounds.snapToPixelBoundaries(); 3716f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 372abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki // When the layer is not an FBO, we may use glCopyTexImage so we 373abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki // need to make sure the layer does not extend outside the bounds 3742d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki // of the framebuffer 375ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki bounds.intersect(snapshot->previous->viewport); 376ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki } 377ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 378abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki if (bounds.isEmpty() || bounds.getWidth() > mCaches.maxTextureSize || 379abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki bounds.getHeight() > mCaches.maxTextureSize) { 380abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->invisible = true; 381abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki } else { 3826f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki snapshot->invisible = snapshot->previous->invisible || 3836f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki (alpha <= ALPHA_THRESHOLD && fboLayer); 384d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki } 385abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 386d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki // Bail out if we won't draw in this snapshot 3876f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki if (snapshot->invisible) { 3886f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki return false; 3896f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki } 3906f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 391d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki glActiveTexture(gTextureUnits[0]); 3922d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki Layer* layer = mCaches.layerCache.get(bounds.getWidth(), bounds.getHeight()); 393ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki if (!layer) { 394ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki return false; 395ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki } 396ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 3976f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki layer->mode = mode; 398d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki layer->alpha = alpha; 399d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki layer->layer.set(bounds); 4006f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki layer->texCoords.set(0.0f, bounds.getHeight() / float(layer->height), 4016f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki bounds.getWidth() / float(layer->width), 0.0f); 4026f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 403abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki // Save the layer in the snapshot 404abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->flags |= Snapshot::kFlagIsLayer; 405abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->layer = layer; 406abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 407ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki if (fboLayer) { 408ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki return createFboLayer(layer, bounds, snapshot, previousFbo); 4095504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki } else { 410d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki // Copy the framebuffer into the layer 411abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki glBindTexture(GL_TEXTURE_2D, layer->texture); 4125504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki 4135504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki if (layer->empty) { 4145504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bounds.left, 415abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->height - bounds.bottom, layer->width, layer->height, 0); 416abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki layer->empty = false; 417abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki } else { 418abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, bounds.left, 419ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki snapshot->height - bounds.bottom, bounds.getWidth(), bounds.getHeight()); 420ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki } 4215504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki 422d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki // Enqueue the buffer coordinates to clear the corresponding region later 423abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki mLayers.push(new Rect(bounds)); 4245504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki } 4255504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki 4265504622fb01ab9774b5e73d05f86ee03a8b68ab7Makoto Onuki return true; 427d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki} 4282d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki 429d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onukibool OpenGLRenderer::createFboLayer(Layer* layer, Rect& bounds, sp<Snapshot> snapshot, 430d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki GLuint previousFbo) { 4312d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki layer->fbo = mCaches.fboCache.get(); 4322d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki 4332d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki#if RENDER_LAYERS_AS_REGIONS 43443204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->region = &snapshot->layer->region; 435abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->flags |= Snapshot::kFlagFboTarget; 436d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki#endif 437abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 438d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki Rect clip(bounds); 439abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->transform->mapRect(clip); 440ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki clip.intersect(*snapshot->clipRect); 441abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki clip.snapToPixelBoundaries(); 442ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki clip.intersect(snapshot->previous->viewport); 443ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 444d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki mat4 inverse; 445d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki inverse.loadInverse(*mSnapshot->transform); 446abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki 447abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki inverse.mapRect(clip); 448d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki clip.snapToPixelBoundaries(); 4496f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki clip.intersect(bounds); 450d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki 451abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki snapshot->flags |= Snapshot::kFlagIsFboLayer; 45243204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->fbo = layer->fbo; 45343204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->resetTransform(-bounds.left, -bounds.top, 0.0f); 45443204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki //snapshot->resetClip(0.0f, 0.0f, bounds.getWidth(), bounds.getHeight()); 45543204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->resetClip(clip.left, clip.top, clip.right, clip.bottom); 45643204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->viewport.set(0.0f, 0.0f, bounds.getWidth(), bounds.getHeight()); 45743204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->height = bounds.getHeight(); 45843204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->flags |= Snapshot::kFlagDirtyOrtho; 45943204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki snapshot->orthoMatrix.load(mOrthoMatrix); 46043204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki 46143204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki // Bind texture to FBO 462abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo); 46343204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki glBindTexture(GL_TEXTURE_2D, layer->texture); 46443204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki 46543204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki // Initialize the texture if needed 46643204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki if (layer->empty) { 4676f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki layer->empty = false; 4686f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, layer->width, layer->height, 0, 469772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy GL_RGBA, GL_UNSIGNED_BYTE, NULL); 470df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 471df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 472df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 473df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani layer->texture, 0); 474df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 475932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani#if DEBUG_LAYERS_AS_REGIONS 476df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER); 477932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani if (status != GL_FRAMEBUFFER_COMPLETE) { 478932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani LOGE("Framebuffer incomplete (GL error code 0x%x)", status); 479df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 480cd65448ccd13c4c2d0fe9e9623fec3a898ab9372Jeff Sharkey glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 4818a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey glDeleteTextures(1, &layer->texture); 4828a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey mCaches.fboCache.put(layer->fbo); 4838a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey 484dcf21d15456e5aca28d063aea73139e30842e6d1Winson Chung delete layer; 485932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani 486932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani return false; 487932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani } 488932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani#endif 489932249db930d78131c4314ff46ec5fca76cb46cdAmith Yamasani 4904f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani // Clear the FBO, expand the clear region by 1 to get nice bilinear filtering 491df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glScissor(clip.left - 1.0f, bounds.getHeight() - clip.bottom - 1.0f, 492df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani clip.getWidth() + 2.0f, clip.getHeight() + 2.0f); 493df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 494df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glClear(GL_COLOR_BUFFER_BIT); 495df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 4964f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani dirtyClip(); 4974f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 498df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani // Change the ortho projection 499df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glViewport(0, 0, bounds.getWidth(), bounds.getHeight()); 50043204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki mOrthoMatrix.loadOrtho(0.0f, bounds.getWidth(), bounds.getHeight(), 0.0f, -1.0f, 1.0f); 5012df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 502df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani return true; 503df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 504df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 5052df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy/** 506cd65448ccd13c4c2d0fe9e9623fec3a898ab9372Jeff Sharkey * Read the documentation of createLayer() before doing anything in this method. 5078a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey */ 5088a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkeyvoid OpenGLRenderer::composeLayer(sp<Snapshot> current, sp<Snapshot> previous) { 5098a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey if (!current->layer) { 5102df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy LOGE("Attempting to compose a layer that does not exist"); 5112df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy return; 5122df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy } 5132df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5142df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy const bool fboLayer = current->flags & Snapshot::kFlagIsFboLayer; 5152df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5162df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy if (fboLayer) { 5172df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy // Unbind current FBO and restore previous one 5182df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy glBindFramebuffer(GL_FRAMEBUFFER, previous->fbo); 5198a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey } 5208a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey 5218a372a0a280127743ce9a7ce4b6198c7a02d2a4fJeff Sharkey Layer* layer = current->layer; 5222df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy const Rect& rect = layer->layer; 5232df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5242df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy if (!fboLayer && layer->alpha < 255) { 5252df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy drawColorRect(rect.left, rect.top, rect.right, rect.bottom, 5262df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy layer->alpha << 24, SkXfermode::kDstIn_Mode, true); 5272df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy // Required below, composeLayerRect() will divide by 255 5282df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy layer->alpha = 255; 5292df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy } 5302df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5312df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy mCaches.unbindMeshBuffer(); 5322df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5332df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy glActiveTexture(gTextureUnits[0]); 5342df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy 5352df1892f411de6fa93ba487e3c4d23a079b74fcbKenny Guy // When the layer is stored in an FBO, we can save a bit of fillrate by 536df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani // drawing only the dirty region 537df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (fboLayer) { 538df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani dirtyLayer(rect.left, rect.top, rect.right, rect.bottom, *previous->transform); 5394f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani composeLayerRegion(layer, rect); 5404f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani } else { 54143204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki dirtyLayer(rect.left, rect.top, rect.right, rect.bottom); 54243204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki composeLayerRect(layer, rect, true); 54343204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki } 54443204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki 54543204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki if (fboLayer) { 54643204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki // Detach the texture from the FBO 54743204b8357d781f284037fb8b7b7050ed04a2103Makoto Onuki glBindFramebuffer(GL_FRAMEBUFFER, current->fbo); 548466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0); 549466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy glBindFramebuffer(GL_FRAMEBUFFER, previous->fbo); 550466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 551466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy // Put the FBO name back in the cache, if it doesn't fit, it will be destroyed 552466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy mCaches.fboCache.put(current->fbo); 553466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy } 554466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 555466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy dirtyClip(); 556466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 557466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy // Failing to add the layer to the cache should happen only if the layer is too large 558466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy if (!mCaches.layerCache.put(layer)) { 559466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy LAYER_LOGD("Deleting layer"); 560466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy glDeleteTextures(1, &layer->texture); 561466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy delete layer; 562369aad0e23a1ca1417018c540730915760fe2ed3Winson } 563466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy} 564466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 565466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guyvoid OpenGLRenderer::composeLayerRect(Layer* layer, const Rect& rect, bool swap) { 566466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy const Rect& texCoords = layer->texCoords; 567466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy resetDrawTextureTexCoords(texCoords.left, texCoords.top, texCoords.right, texCoords.bottom); 568466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy 569466d203c4ff032477d9a6bdb077ce3cd9b4fe070Kenny Guy drawTextureMesh(rect.left, rect.top, rect.right, rect.bottom, layer->texture, 5704dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki layer->alpha / 255.0f, layer->mode, layer->blend, &mMeshVertices[0].position[0], 5714dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki &mMeshVertices[0].texture[0], GL_TRIANGLE_STRIP, gMeshCount, swap, swap); 572ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki 5734dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 5744dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki} 5754dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 5764dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukivoid OpenGLRenderer::composeLayerRegion(Layer* layer, const Rect& rect) { 5774dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki#if RENDER_LAYERS_AS_REGIONS 578ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki if (layer->region.isRect()) { 5794dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki composeLayerRect(layer, rect); 5804dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki layer->region.clear(); 5814dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki return; 5824dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 5834dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 5844dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki if (!layer->region.isEmpty()) { 5854dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki size_t count; 5864dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki const android::Rect* rects = layer->region.getArray(&count); 5874dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 5884dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki setupDraw(); 589df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 5904dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki ProgramDescription description; 5914dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki description.hasTexture = true; 5924dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 5934dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki const float alpha = layer->alpha / 255.0f; 5944dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki const bool setColor = description.setColor(alpha, alpha, alpha, alpha); 5954dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki chooseBlending(layer->blend || layer->alpha < 255, layer->mode, description, false); 5964dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 5974f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani useProgram(mCaches.programCache.get(description)); 5984dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 599ac21497f174504472e92b99500709518b8ab2d71Makoto Onuki // Texture 6004f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani bindTexture(layer->texture); 6014dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki glUniform1i(mCaches.currentProgram->getUniform("sampler"), 0); 6024dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 603c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki // Always premultiplied 604aa8b94aa79df94d77d0f7698ce532ac98f197a99Makoto Onuki if (setColor) { 605c5475d42a45ba48477257879e7a5b2af54a23f98Makoto Onuki mCaches.currentProgram->setColor(alpha, alpha, alpha, alpha); 6064dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 6074dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 6084dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki // Mesh 6094f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani int texCoordsSlot = mCaches.currentProgram->getAttrib("texCoords"); 6106f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki glEnableVertexAttribArray(texCoordsSlot); 6116f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 612df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mModelView.loadIdentity(); 613df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mCaches.currentProgram->set(mOrthoMatrix, mModelView, *mSnapshot->transform); 614df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 615df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float texX = 1.0f / float(layer->width); 616df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float texY = 1.0f / float(layer->height); 617df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 6184dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki TextureVertex* mesh = mCaches.getRegionMesh(); 6194dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki GLsizei numQuads = 0; 620df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 621df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glVertexAttribPointer(mCaches.currentProgram->position, 2, GL_FLOAT, GL_FALSE, 622df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani gMeshStride, &mesh[0].position[0]); 623df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glVertexAttribPointer(texCoordsSlot, 2, GL_FLOAT, GL_FALSE, 624df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani gMeshStride, &mesh[0].texture[0]); 6254f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 626df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani for (size_t i = 0; i < count; i++) { 627df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const android::Rect* r = &rects[i]; 628df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 6294f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani const float u1 = r->left * texX; 6304f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani const float v1 = (rect.getHeight() - r->top) * texY; 631df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float u2 = r->right * texX; 632df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float v2 = (rect.getHeight() - r->bottom) * texY; 633df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 634df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani // TODO: Reject quads outside of the clip 635df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani TextureVertex::set(mesh++, r->left, r->top, u1, v1); 636df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani TextureVertex::set(mesh++, r->right, r->top, u2, v1); 6374dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 6384dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 639df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 640df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani numQuads++; 641df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 642df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (numQuads >= REGION_MESH_QUAD_COUNT) { 643df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glDrawElements(GL_TRIANGLES, numQuads * 6, GL_UNSIGNED_SHORT, NULL); 644df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani numQuads = 0; 645df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mesh = mCaches.getRegionMesh(); 6464f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani } 647df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 648df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 649df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if (numQuads > 0) { 650df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glDrawElements(GL_TRIANGLES, numQuads * 6, GL_UNSIGNED_SHORT, NULL); 651df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 652df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 653df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); 654df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glDisableVertexAttribArray(texCoordsSlot); 655df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 6564dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki#if DEBUG_LAYERS_AS_REGIONS 6574dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki uint32_t colors[] = { 658df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 0x7fff0000, 0x7f00ff00, 659df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 0x7f0000ff, 0x7fff00ff, 660df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani }; 661df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 662df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani int offset = 0; 6634f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani int32_t top = rects[0].top; 664df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani int i = 0; 665df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 666df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani for (size_t i = 0; i < count; i++) { 6674f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani if (top != rects[i].top) { 6684f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani offset ^= 0x2; 669df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani top = rects[i].top; 670df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 671df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 672df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani Rect r(rects[i].left, rects[i].top, rects[i].right, rects[i].bottom); 673df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani drawColorRect(r.left, r.top, r.right, r.bottom, colors[offset + (i & 0x1)], 674df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani SkXfermode::kSrcOver_Mode); 6754dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 6764dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki#endif 677df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 678df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani layer->region.clear(); 679df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 680df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#else 681df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani composeLayerRect(layer, rect); 682df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#endif 683df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 6844f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 685df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::dirtyLayer(const float left, const float top, 686df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float right, const float bottom, const mat4 transform) { 687df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#if RENDER_LAYERS_AS_REGIONS 688df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani if ((mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region) { 689df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani Rect bounds(left, top, right, bottom); 690df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani transform.mapRect(bounds); 691df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani bounds.intersect(*mSnapshot->clipRect); 692df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani bounds.snapToPixelBoundaries(); 693df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 6944dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki android::Rect dirty(bounds.left, bounds.top, bounds.right, bounds.bottom); 6954dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki if (!dirty.isEmpty()) { 696df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mSnapshot->region->orSelf(dirty); 697df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 698df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani } 699df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#endif 700df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 7014f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani 702df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasanivoid OpenGLRenderer::dirtyLayer(const float left, const float top, 703df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani const float right, const float bottom) { 704df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani#if RENDER_LAYERS_AS_REGIONS 7054f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani if ((mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region) { 7064f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani Rect bounds(left, top, right, bottom); 707772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy bounds.intersect(*mSnapshot->clipRect); 708772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy bounds.snapToPixelBoundaries(); 709772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 710772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy android::Rect dirty(bounds.left, bounds.top, bounds.right, bounds.bottom); 711772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy if (!dirty.isEmpty()) { 712772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy mSnapshot->region->orSelf(dirty); 7134dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 7144dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 715772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy#endif 716772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy} 717772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 718772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guyvoid OpenGLRenderer::setupDraw() { 719772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy clearLayerRegions(); 720772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy if (mDirtyClip) { 721772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy setScissorFromClip(); 722772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy } 723772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy} 724772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 725772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guyvoid OpenGLRenderer::clearLayerRegions() { 726772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy if (mLayers.size() == 0 || mSnapshot->invisible) return; 727772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 728772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy Rect clipRect(*mSnapshot->clipRect); 729772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy clipRect.snapToPixelBoundaries(); 730772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 731772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy for (uint32_t i = 0; i < mLayers.size(); i++) { 7324dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki Rect* bounds = mLayers.itemAt(i); 7334dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki if (clipRect.intersects(*bounds)) { 734772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy // Clear the framebuffer where the layer will draw 735772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy glScissor(bounds->left, mSnapshot->height - bounds->bottom, 736772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy bounds->getWidth(), bounds->getHeight()); 737772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 738772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy glClear(GL_COLOR_BUFFER_BIT); 739772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 740772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy // Restore the clip 741772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy dirtyClip(); 742772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy } 743772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy 744772427555f2624b38124ab8e586ac0ccc451eb53Kenny Guy delete bounds; 7456f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki } 7466f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 7474dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki mLayers.clear(); 748538c440c33fc2b9e0bf0c680ddbb14f9a079ff6aMakoto Onuki} 749538c440c33fc2b9e0bf0c680ddbb14f9a079ff6aMakoto Onuki 750538c440c33fc2b9e0bf0c680ddbb14f9a079ff6aMakoto Onuki/////////////////////////////////////////////////////////////////////////////// 751aa8b94aa79df94d77d0f7698ce532ac98f197a99Makoto Onuki// Transforms 7524dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki/////////////////////////////////////////////////////////////////////////////// 7534dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 7544dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukivoid OpenGLRenderer::translate(float dx, float dy) { 7554dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki mSnapshot->transform->translate(dx, dy, 0.0f); 7566f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki} 7576f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 7586f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onukivoid OpenGLRenderer::rotate(float degrees) { 7596f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki mSnapshot->transform->rotate(degrees, 0.0f, 0.0f, 1.0f); 7606f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki} 7614dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 7624dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukivoid OpenGLRenderer::scale(float sx, float sy) { 7632d5b465fa9235e66ec176f6d6ffaaa0c18143e41Makoto Onuki mSnapshot->transform->scale(sx, sy, 1.0f); 764d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki} 765d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki 7664dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukivoid OpenGLRenderer::setMatrix(SkMatrix* matrix) { 767d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki mSnapshot->transform->load(*matrix); 768d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki} 7694dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 7704dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukiconst float* OpenGLRenderer::getMatrix() const { 7714dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki if (mSnapshot->fbo != 0) { 7724dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki return &mSnapshot->transform->data[0]; 7734dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki } 7744dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki return &mIdentity.data[0]; 7754dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki} 776d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onuki 777d99c6f04bbb68f8be78f2c3ca625a3a8d5645275Makoto Onukivoid OpenGLRenderer::getMatrix(SkMatrix* matrix) { 778abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki mSnapshot->transform->copyTo(*matrix); 779abe8442951ff88aa01ed882adb54fb1b3472ca3eMakoto Onuki} 7804dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki 7814dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onukivoid OpenGLRenderer::concatMatrix(SkMatrix* matrix) { 7824dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki SkMatrix transform; 7834dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki mSnapshot->transform->copyTo(transform); 7846f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki transform.preConcat(*matrix); 7856f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki mSnapshot->transform->load(transform); 7864dbe0ded4ae9faaef580be80184fca0749e27198Makoto Onuki} 7876f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 7886f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki/////////////////////////////////////////////////////////////////////////////// 7896f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki// Clipping 7906f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki/////////////////////////////////////////////////////////////////////////////// 7916f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onuki 7926f7362d92573e4ae693bc513dca586d6a4eb087bMakoto Onukivoid OpenGLRenderer::setScissorFromClip() { 7934f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani Rect clip(*mSnapshot->clipRect); 7944f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani clip.snapToPixelBoundaries(); 795df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani glScissor(clip.left, mSnapshot->height - clip.bottom, clip.getWidth(), clip.getHeight()); 796df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani mDirtyClip = false; 797df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani} 798df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasani 799df7db074b5e6a19c8a33c2cc6be88f85eb5ee47cAmith Yamasaniconst Rect& OpenGLRenderer::getClipBounds() { 8004f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani return mSnapshot->getLocalClip(); 8014f58263d02f296430a9653126d28501e95c7bb6cAmith Yamasani} 802b6830197450d5a2befaf0dc4f7e73850f4c55846Nicolas Prevot 803bool OpenGLRenderer::quickReject(float left, float top, float right, float bottom) { 804 if (mSnapshot->invisible) { 805 return true; 806 } 807 808 Rect r(left, top, right, bottom); 809 mSnapshot->transform->mapRect(r); 810 r.snapToPixelBoundaries(); 811 812 Rect clipRect(*mSnapshot->clipRect); 813 clipRect.snapToPixelBoundaries(); 814 815 return !clipRect.intersects(r); 816} 817 818bool OpenGLRenderer::clipRect(float left, float top, float right, float bottom, SkRegion::Op op) { 819 bool clipped = mSnapshot->clip(left, top, right, bottom, op); 820 if (clipped) { 821 dirtyClip(); 822 } 823 return !mSnapshot->clipRect->isEmpty(); 824} 825 826/////////////////////////////////////////////////////////////////////////////// 827// Drawing 828/////////////////////////////////////////////////////////////////////////////// 829 830void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint) { 831 const float right = left + bitmap->width(); 832 const float bottom = top + bitmap->height(); 833 834 if (quickReject(left, top, right, bottom)) { 835 return; 836 } 837 838 glActiveTexture(GL_TEXTURE0); 839 Texture* texture = mCaches.textureCache.get(bitmap); 840 if (!texture) return; 841 const AutoTexture autoCleanup(texture); 842 843 drawTextureRect(left, top, right, bottom, texture, paint); 844} 845 846void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) { 847 Rect r(0.0f, 0.0f, bitmap->width(), bitmap->height()); 848 const mat4 transform(*matrix); 849 transform.mapRect(r); 850 851 if (quickReject(r.left, r.top, r.right, r.bottom)) { 852 return; 853 } 854 855 glActiveTexture(GL_TEXTURE0); 856 Texture* texture = mCaches.textureCache.get(bitmap); 857 if (!texture) return; 858 const AutoTexture autoCleanup(texture); 859 860 // This could be done in a cheaper way, all we need is pass the matrix 861 // to the vertex shader. The save/restore is a bit overkill. 862 save(SkCanvas::kMatrix_SaveFlag); 863 concatMatrix(matrix); 864 drawTextureRect(0.0f, 0.0f, bitmap->width(), bitmap->height(), texture, paint); 865 restore(); 866} 867 868void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, 869 float srcLeft, float srcTop, float srcRight, float srcBottom, 870 float dstLeft, float dstTop, float dstRight, float dstBottom, 871 SkPaint* paint) { 872 if (quickReject(dstLeft, dstTop, dstRight, dstBottom)) { 873 return; 874 } 875 876 glActiveTexture(gTextureUnits[0]); 877 Texture* texture = mCaches.textureCache.get(bitmap); 878 if (!texture) return; 879 const AutoTexture autoCleanup(texture); 880 setTextureWrapModes(texture, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE); 881 882 const float width = texture->width; 883 const float height = texture->height; 884 885 const float u1 = srcLeft / width; 886 const float v1 = srcTop / height; 887 const float u2 = srcRight / width; 888 const float v2 = srcBottom / height; 889 890 mCaches.unbindMeshBuffer(); 891 resetDrawTextureTexCoords(u1, v1, u2, v2); 892 893 int alpha; 894 SkXfermode::Mode mode; 895 getAlphaAndMode(paint, &alpha, &mode); 896 897 drawTextureMesh(dstLeft, dstTop, dstRight, dstBottom, texture->id, alpha / 255.0f, 898 mode, texture->blend, &mMeshVertices[0].position[0], &mMeshVertices[0].texture[0], 899 GL_TRIANGLE_STRIP, gMeshCount); 900 901 resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 902} 903 904void OpenGLRenderer::drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 905 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 906 float left, float top, float right, float bottom, SkPaint* paint) { 907 if (quickReject(left, top, right, bottom)) { 908 return; 909 } 910 911 glActiveTexture(gTextureUnits[0]); 912 Texture* texture = mCaches.textureCache.get(bitmap); 913 if (!texture) return; 914 const AutoTexture autoCleanup(texture); 915 setTextureWrapModes(texture, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE); 916 917 int alpha; 918 SkXfermode::Mode mode; 919 getAlphaAndMode(paint, &alpha, &mode); 920 921 const Patch* mesh = mCaches.patchCache.get(bitmap->width(), bitmap->height(), 922 right - left, bottom - top, xDivs, yDivs, colors, width, height, numColors); 923 924 if (mesh) { 925 // Mark the current layer dirty where we are going to draw the patch 926 if ((mSnapshot->flags & Snapshot::kFlagFboTarget) && 927 mSnapshot->region && mesh->hasEmptyQuads) { 928 const size_t count = mesh->quads.size(); 929 for (size_t i = 0; i < count; i++) { 930 Rect bounds = mesh->quads.itemAt(i); 931 dirtyLayer(bounds.left, bounds.top, bounds.right, bounds.bottom, 932 *mSnapshot->transform); 933 } 934 } 935 936 drawTextureMesh(left, top, right, bottom, texture->id, alpha / 255.0f, 937 mode, texture->blend, (GLvoid*) 0, (GLvoid*) gMeshTextureOffset, 938 GL_TRIANGLES, mesh->verticesCount, false, false, mesh->meshBuffer, 939 true, !mesh->hasEmptyQuads); 940 } 941} 942 943void OpenGLRenderer::drawLines(float* points, int count, SkPaint* paint) { 944 if (mSnapshot->invisible) return; 945 946 int alpha; 947 SkXfermode::Mode mode; 948 getAlphaAndMode(paint, &alpha, &mode); 949 950 uint32_t color = paint->getColor(); 951 const GLfloat a = alpha / 255.0f; 952 const GLfloat r = a * ((color >> 16) & 0xFF) / 255.0f; 953 const GLfloat g = a * ((color >> 8) & 0xFF) / 255.0f; 954 const GLfloat b = a * ((color ) & 0xFF) / 255.0f; 955 956 const bool isAA = paint->isAntiAlias(); 957 if (isAA) { 958 GLuint textureUnit = 0; 959 glActiveTexture(gTextureUnits[textureUnit]); 960 setupTextureAlpha8(mCaches.line.getTexture(), 0, 0, textureUnit, 0.0f, 0.0f, r, g, b, a, 961 mode, false, true, (GLvoid*) 0, (GLvoid*) gMeshTextureOffset, 962 mCaches.line.getMeshBuffer()); 963 } else { 964 setupColorRect(0.0f, 0.0f, 1.0f, 1.0f, r, g, b, a, mode, false); 965 } 966 967 const float strokeWidth = paint->getStrokeWidth(); 968 const GLsizei elementsCount = isAA ? mCaches.line.getElementsCount() : gMeshCount; 969 const GLenum drawMode = isAA ? GL_TRIANGLES : GL_TRIANGLE_STRIP; 970 971 for (int i = 0; i < count; i += 4) { 972 float tx = 0.0f; 973 float ty = 0.0f; 974 975 if (isAA) { 976 mCaches.line.update(points[i], points[i + 1], points[i + 2], points[i + 3], 977 strokeWidth, tx, ty); 978 } else { 979 ty = strokeWidth <= 1.0f ? 0.0f : -strokeWidth * 0.5f; 980 } 981 982 const float dx = points[i + 2] - points[i]; 983 const float dy = points[i + 3] - points[i + 1]; 984 const float mag = sqrtf(dx * dx + dy * dy); 985 const float angle = acos(dx / mag); 986 987 mModelView.loadTranslate(points[i], points[i + 1], 0.0f); 988 if (angle > MIN_ANGLE || angle < -MIN_ANGLE) { 989 mModelView.rotate(angle * RAD_TO_DEG, 0.0f, 0.0f, 1.0f); 990 } 991 mModelView.translate(tx, ty, 0.0f); 992 if (!isAA) { 993 float length = mCaches.line.getLength(points[i], points[i + 1], 994 points[i + 2], points[i + 3]); 995 mModelView.scale(length, strokeWidth, 1.0f); 996 } 997 mCaches.currentProgram->set(mOrthoMatrix, mModelView, *mSnapshot->transform); 998 // TODO: Add bounds to the layer's region 999 1000 if (mShader) { 1001 mShader->updateTransforms(mCaches.currentProgram, mModelView, *mSnapshot); 1002 } 1003 1004 glDrawArrays(drawMode, 0, elementsCount); 1005 } 1006 1007 if (isAA) { 1008 glDisableVertexAttribArray(mCaches.currentProgram->getAttrib("texCoords")); 1009 } 1010} 1011 1012void OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { 1013 Rect& clip(*mSnapshot->clipRect); 1014 clip.snapToPixelBoundaries(); 1015 drawColorRect(clip.left, clip.top, clip.right, clip.bottom, color, mode, true); 1016} 1017 1018void OpenGLRenderer::drawRect(float left, float top, float right, float bottom, SkPaint* p) { 1019 if (quickReject(left, top, right, bottom)) { 1020 return; 1021 } 1022 1023 SkXfermode::Mode mode; 1024 if (!mCaches.extensions.hasFramebufferFetch()) { 1025 const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); 1026 if (!isMode) { 1027 // Assume SRC_OVER 1028 mode = SkXfermode::kSrcOver_Mode; 1029 } 1030 } else { 1031 mode = getXfermode(p->getXfermode()); 1032 } 1033 1034 // Skia draws using the color's alpha channel if < 255 1035 // Otherwise, it uses the paint's alpha 1036 int color = p->getColor(); 1037 if (((color >> 24) & 0xff) == 255) { 1038 color |= p->getAlpha() << 24; 1039 } 1040 1041 drawColorRect(left, top, right, bottom, color, mode); 1042} 1043 1044void OpenGLRenderer::drawText(const char* text, int bytesCount, int count, 1045 float x, float y, SkPaint* paint) { 1046 if (text == NULL || count == 0 || (paint->getAlpha() == 0 && paint->getXfermode() == NULL)) { 1047 return; 1048 } 1049 if (mSnapshot->invisible) return; 1050 1051 paint->setAntiAlias(true); 1052 1053 float length = -1.0f; 1054 switch (paint->getTextAlign()) { 1055 case SkPaint::kCenter_Align: 1056 length = paint->measureText(text, bytesCount); 1057 x -= length / 2.0f; 1058 break; 1059 case SkPaint::kRight_Align: 1060 length = paint->measureText(text, bytesCount); 1061 x -= length; 1062 break; 1063 default: 1064 break; 1065 } 1066 1067 int alpha; 1068 SkXfermode::Mode mode; 1069 getAlphaAndMode(paint, &alpha, &mode); 1070 1071 uint32_t color = paint->getColor(); 1072 const GLfloat a = alpha / 255.0f; 1073 const GLfloat r = a * ((color >> 16) & 0xFF) / 255.0f; 1074 const GLfloat g = a * ((color >> 8) & 0xFF) / 255.0f; 1075 const GLfloat b = a * ((color ) & 0xFF) / 255.0f; 1076 1077 FontRenderer& fontRenderer = mCaches.fontRenderer.getFontRenderer(paint); 1078 fontRenderer.setFont(paint, SkTypeface::UniqueID(paint->getTypeface()), 1079 paint->getTextSize()); 1080 1081 setupDraw(); 1082 1083 if (mHasShadow) { 1084 glActiveTexture(gTextureUnits[0]); 1085 mCaches.dropShadowCache.setFontRenderer(fontRenderer); 1086 const ShadowTexture* shadow = mCaches.dropShadowCache.get(paint, text, bytesCount, 1087 count, mShadowRadius); 1088 const AutoTexture autoCleanup(shadow); 1089 1090 setupShadow(shadow, x, y, mode, a); 1091 1092 // Draw the mesh 1093 glDrawArrays(GL_TRIANGLE_STRIP, 0, gMeshCount); 1094 glDisableVertexAttribArray(mCaches.currentProgram->getAttrib("texCoords")); 1095 } 1096 1097 GLuint textureUnit = 0; 1098 glActiveTexture(gTextureUnits[textureUnit]); 1099 1100 // Assume that the modelView matrix does not force scales, rotates, etc. 1101 const bool linearFilter = mSnapshot->transform->changesBounds(); 1102 1103 // Dimensions are set to (0,0), the layer (if any) won't be dirtied 1104 setupTextureAlpha8(fontRenderer.getTexture(linearFilter), 0, 0, textureUnit, 1105 x, y, r, g, b, a, mode, false, true, NULL, NULL); 1106 1107 const Rect& clip = mSnapshot->getLocalClip(); 1108 Rect bounds(FLT_MAX / 2.0f, FLT_MAX / 2.0f, FLT_MIN / 2.0f, FLT_MIN / 2.0f); 1109 1110#if RENDER_LAYERS_AS_REGIONS 1111 bool hasLayer = (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 1112#else 1113 bool hasLayer = false; 1114#endif 1115 1116 mCaches.unbindMeshBuffer(); 1117 if (fontRenderer.renderText(paint, &clip, text, 0, bytesCount, count, x, y, 1118 hasLayer ? &bounds : NULL)) { 1119#if RENDER_LAYERS_AS_REGIONS 1120 if (hasLayer) { 1121 mSnapshot->transform->mapRect(bounds); 1122 bounds.intersect(*mSnapshot->clipRect); 1123 bounds.snapToPixelBoundaries(); 1124 1125 android::Rect dirty(bounds.left, bounds.top, bounds.right, bounds.bottom); 1126 mSnapshot->region->orSelf(dirty); 1127 } 1128#endif 1129 } 1130 1131 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); 1132 glDisableVertexAttribArray(mCaches.currentProgram->getAttrib("texCoords")); 1133 1134 drawTextDecorations(text, bytesCount, length, x, y, paint); 1135} 1136 1137void OpenGLRenderer::drawPath(SkPath* path, SkPaint* paint) { 1138 if (mSnapshot->invisible) return; 1139 1140 GLuint textureUnit = 0; 1141 glActiveTexture(gTextureUnits[textureUnit]); 1142 1143 const PathTexture* texture = mCaches.pathCache.get(path, paint); 1144 if (!texture) return; 1145 const AutoTexture autoCleanup(texture); 1146 1147 const float x = texture->left - texture->offset; 1148 const float y = texture->top - texture->offset; 1149 1150 if (quickReject(x, y, x + texture->width, y + texture->height)) { 1151 return; 1152 } 1153 1154 int alpha; 1155 SkXfermode::Mode mode; 1156 getAlphaAndMode(paint, &alpha, &mode); 1157 1158 uint32_t color = paint->getColor(); 1159 const GLfloat a = alpha / 255.0f; 1160 const GLfloat r = a * ((color >> 16) & 0xFF) / 255.0f; 1161 const GLfloat g = a * ((color >> 8) & 0xFF) / 255.0f; 1162 const GLfloat b = a * ((color ) & 0xFF) / 255.0f; 1163 1164 setupTextureAlpha8(texture, textureUnit, x, y, r, g, b, a, mode, true, true); 1165 1166 setupDraw(); 1167 1168 // Draw the mesh 1169 glDrawArrays(GL_TRIANGLE_STRIP, 0, gMeshCount); 1170 glDisableVertexAttribArray(mCaches.currentProgram->getAttrib("texCoords")); 1171} 1172 1173/////////////////////////////////////////////////////////////////////////////// 1174// Shaders 1175/////////////////////////////////////////////////////////////////////////////// 1176 1177void OpenGLRenderer::resetShader() { 1178 mShader = NULL; 1179} 1180 1181void OpenGLRenderer::setupShader(SkiaShader* shader) { 1182 mShader = shader; 1183 if (mShader) { 1184 mShader->set(&mCaches.textureCache, &mCaches.gradientCache); 1185 } 1186} 1187 1188/////////////////////////////////////////////////////////////////////////////// 1189// Color filters 1190/////////////////////////////////////////////////////////////////////////////// 1191 1192void OpenGLRenderer::resetColorFilter() { 1193 mColorFilter = NULL; 1194} 1195 1196void OpenGLRenderer::setupColorFilter(SkiaColorFilter* filter) { 1197 mColorFilter = filter; 1198} 1199 1200/////////////////////////////////////////////////////////////////////////////// 1201// Drop shadow 1202/////////////////////////////////////////////////////////////////////////////// 1203 1204void OpenGLRenderer::resetShadow() { 1205 mHasShadow = false; 1206} 1207 1208void OpenGLRenderer::setupShadow(float radius, float dx, float dy, int color) { 1209 mHasShadow = true; 1210 mShadowRadius = radius; 1211 mShadowDx = dx; 1212 mShadowDy = dy; 1213 mShadowColor = color; 1214} 1215 1216/////////////////////////////////////////////////////////////////////////////// 1217// Drawing implementation 1218/////////////////////////////////////////////////////////////////////////////// 1219 1220void OpenGLRenderer::setupShadow(const ShadowTexture* texture, float x, float y, 1221 SkXfermode::Mode mode, float alpha) { 1222 const float sx = x - texture->left + mShadowDx; 1223 const float sy = y - texture->top + mShadowDy; 1224 1225 const int shadowAlpha = ((mShadowColor >> 24) & 0xFF); 1226 const GLfloat a = shadowAlpha < 255 ? shadowAlpha / 255.0f : alpha; 1227 const GLfloat r = a * ((mShadowColor >> 16) & 0xFF) / 255.0f; 1228 const GLfloat g = a * ((mShadowColor >> 8) & 0xFF) / 255.0f; 1229 const GLfloat b = a * ((mShadowColor ) & 0xFF) / 255.0f; 1230 1231 GLuint textureUnit = 0; 1232 setupTextureAlpha8(texture, textureUnit, sx, sy, r, g, b, a, mode, true, false); 1233} 1234 1235void OpenGLRenderer::setupTextureAlpha8(const Texture* texture, GLuint& textureUnit, 1236 float x, float y, float r, float g, float b, float a, SkXfermode::Mode mode, 1237 bool transforms, bool applyFilters) { 1238 setupTextureAlpha8(texture->id, texture->width, texture->height, textureUnit, 1239 x, y, r, g, b, a, mode, transforms, applyFilters, 1240 (GLvoid*) 0, (GLvoid*) gMeshTextureOffset); 1241} 1242 1243void OpenGLRenderer::setupTextureAlpha8(GLuint texture, uint32_t width, uint32_t height, 1244 GLuint& textureUnit, float x, float y, float r, float g, float b, float a, 1245 SkXfermode::Mode mode, bool transforms, bool applyFilters) { 1246 setupTextureAlpha8(texture, width, height, textureUnit, x, y, r, g, b, a, mode, 1247 transforms, applyFilters, (GLvoid*) 0, (GLvoid*) gMeshTextureOffset); 1248} 1249 1250void OpenGLRenderer::setupTextureAlpha8(GLuint texture, uint32_t width, uint32_t height, 1251 GLuint& textureUnit, float x, float y, float r, float g, float b, float a, 1252 SkXfermode::Mode mode, bool transforms, bool applyFilters, 1253 GLvoid* vertices, GLvoid* texCoords, GLuint vbo) { 1254 // Describe the required shaders 1255 ProgramDescription description; 1256 description.hasTexture = true; 1257 description.hasAlpha8Texture = true; 1258 const bool setColor = description.setAlpha8Color(r, g, b, a); 1259 1260 if (applyFilters) { 1261 if (mShader) { 1262 mShader->describe(description, mCaches.extensions); 1263 } 1264 if (mColorFilter) { 1265 mColorFilter->describe(description, mCaches.extensions); 1266 } 1267 } 1268 1269 // Setup the blending mode 1270 chooseBlending(true, mode, description); 1271 1272 // Build and use the appropriate shader 1273 useProgram(mCaches.programCache.get(description)); 1274 1275 bindTexture(texture); 1276 glUniform1i(mCaches.currentProgram->getUniform("sampler"), textureUnit); 1277 1278 int texCoordsSlot = mCaches.currentProgram->getAttrib("texCoords"); 1279 glEnableVertexAttribArray(texCoordsSlot); 1280 1281 if (texCoords) { 1282 // Setup attributes 1283 if (!vertices) { 1284 mCaches.bindMeshBuffer(vbo == 0 ? mCaches.meshBuffer : vbo); 1285 } else { 1286 mCaches.unbindMeshBuffer(); 1287 } 1288 glVertexAttribPointer(mCaches.currentProgram->position, 2, GL_FLOAT, GL_FALSE, 1289 gMeshStride, vertices); 1290 glVertexAttribPointer(texCoordsSlot, 2, GL_FLOAT, GL_FALSE, gMeshStride, texCoords); 1291 } 1292 1293 // Setup uniforms 1294 if (transforms) { 1295 mModelView.loadTranslate(x, y, 0.0f); 1296 mModelView.scale(width, height, 1.0f); 1297 } else { 1298 mModelView.loadIdentity(); 1299 } 1300 1301 mCaches.currentProgram->set(mOrthoMatrix, mModelView, *mSnapshot->transform); 1302 if (width > 0 && height > 0) { 1303 dirtyLayer(x, y, x + width, y + height, *mSnapshot->transform); 1304 } 1305 1306 if (setColor) { 1307 mCaches.currentProgram->setColor(r, g, b, a); 1308 } 1309 1310 textureUnit++; 1311 if (applyFilters) { 1312 // Setup attributes and uniforms required by the shaders 1313 if (mShader) { 1314 mShader->setupProgram(mCaches.currentProgram, mModelView, *mSnapshot, &textureUnit); 1315 } 1316 if (mColorFilter) { 1317 mColorFilter->setupProgram(mCaches.currentProgram); 1318 } 1319 } 1320} 1321 1322// Same values used by Skia 1323#define kStdStrikeThru_Offset (-6.0f / 21.0f) 1324#define kStdUnderline_Offset (1.0f / 9.0f) 1325#define kStdUnderline_Thickness (1.0f / 18.0f) 1326 1327void OpenGLRenderer::drawTextDecorations(const char* text, int bytesCount, float length, 1328 float x, float y, SkPaint* paint) { 1329 // Handle underline and strike-through 1330 uint32_t flags = paint->getFlags(); 1331 if (flags & (SkPaint::kUnderlineText_Flag | SkPaint::kStrikeThruText_Flag)) { 1332 float underlineWidth = length; 1333 // If length is > 0.0f, we already measured the text for the text alignment 1334 if (length <= 0.0f) { 1335 underlineWidth = paint->measureText(text, bytesCount); 1336 } 1337 1338 float offsetX = 0; 1339 switch (paint->getTextAlign()) { 1340 case SkPaint::kCenter_Align: 1341 offsetX = underlineWidth * 0.5f; 1342 break; 1343 case SkPaint::kRight_Align: 1344 offsetX = underlineWidth; 1345 break; 1346 default: 1347 break; 1348 } 1349 1350 if (underlineWidth > 0.0f) { 1351 const float textSize = paint->getTextSize(); 1352 const float strokeWidth = textSize * kStdUnderline_Thickness; 1353 1354 const float left = x - offsetX; 1355 float top = 0.0f; 1356 1357 const int pointsCount = 4 * (flags & SkPaint::kStrikeThruText_Flag ? 2 : 1); 1358 float points[pointsCount]; 1359 int currentPoint = 0; 1360 1361 if (flags & SkPaint::kUnderlineText_Flag) { 1362 top = y + textSize * kStdUnderline_Offset; 1363 points[currentPoint++] = left; 1364 points[currentPoint++] = top; 1365 points[currentPoint++] = left + underlineWidth; 1366 points[currentPoint++] = top; 1367 } 1368 1369 if (flags & SkPaint::kStrikeThruText_Flag) { 1370 top = y + textSize * kStdStrikeThru_Offset; 1371 points[currentPoint++] = left; 1372 points[currentPoint++] = top; 1373 points[currentPoint++] = left + underlineWidth; 1374 points[currentPoint++] = top; 1375 } 1376 1377 SkPaint linesPaint(*paint); 1378 linesPaint.setStrokeWidth(strokeWidth); 1379 1380 drawLines(&points[0], pointsCount, &linesPaint); 1381 } 1382 } 1383} 1384 1385void OpenGLRenderer::drawColorRect(float left, float top, float right, float bottom, 1386 int color, SkXfermode::Mode mode, bool ignoreTransform) { 1387 setupDraw(); 1388 1389 // If a shader is set, preserve only the alpha 1390 if (mShader) { 1391 color |= 0x00ffffff; 1392 } 1393 1394 // Render using pre-multiplied alpha 1395 const int alpha = (color >> 24) & 0xFF; 1396 const GLfloat a = alpha / 255.0f; 1397 const GLfloat r = a * ((color >> 16) & 0xFF) / 255.0f; 1398 const GLfloat g = a * ((color >> 8) & 0xFF) / 255.0f; 1399 const GLfloat b = a * ((color ) & 0xFF) / 255.0f; 1400 1401 setupColorRect(left, top, right, bottom, r, g, b, a, mode, ignoreTransform); 1402 1403 // Draw the mesh 1404 glDrawArrays(GL_TRIANGLE_STRIP, 0, gMeshCount); 1405} 1406 1407void OpenGLRenderer::setupColorRect(float left, float top, float right, float bottom, 1408 float r, float g, float b, float a, SkXfermode::Mode mode, bool ignoreTransform) { 1409 GLuint textureUnit = 0; 1410 1411 // Describe the required shaders 1412 ProgramDescription description; 1413 const bool setColor = description.setColor(r, g, b, a); 1414 1415 if (mShader) { 1416 mShader->describe(description, mCaches.extensions); 1417 } 1418 if (mColorFilter) { 1419 mColorFilter->describe(description, mCaches.extensions); 1420 } 1421 1422 // Setup the blending mode 1423 chooseBlending(a < 1.0f || (mShader && mShader->blend()), mode, description); 1424 1425 // Build and use the appropriate shader 1426 useProgram(mCaches.programCache.get(description)); 1427 1428 // Setup attributes 1429 mCaches.bindMeshBuffer(); 1430 glVertexAttribPointer(mCaches.currentProgram->position, 2, GL_FLOAT, GL_FALSE, 1431 gMeshStride, 0); 1432 1433 // Setup uniforms 1434 mModelView.loadTranslate(left, top, 0.0f); 1435 mModelView.scale(right - left, bottom - top, 1.0f); 1436 if (!ignoreTransform) { 1437 mCaches.currentProgram->set(mOrthoMatrix, mModelView, *mSnapshot->transform); 1438 dirtyLayer(left, top, right, bottom, *mSnapshot->transform); 1439 } else { 1440 mat4 identity; 1441 mCaches.currentProgram->set(mOrthoMatrix, mModelView, identity); 1442 dirtyLayer(left, top, right, bottom); 1443 } 1444 mCaches.currentProgram->setColor(r, g, b, a); 1445 1446 // Setup attributes and uniforms required by the shaders 1447 if (mShader) { 1448 mShader->setupProgram(mCaches.currentProgram, mModelView, *mSnapshot, &textureUnit); 1449 } 1450 if (mColorFilter) { 1451 mColorFilter->setupProgram(mCaches.currentProgram); 1452 } 1453} 1454 1455void OpenGLRenderer::drawTextureRect(float left, float top, float right, float bottom, 1456 Texture* texture, SkPaint* paint) { 1457 int alpha; 1458 SkXfermode::Mode mode; 1459 getAlphaAndMode(paint, &alpha, &mode); 1460 1461 setTextureWrapModes(texture, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE); 1462 1463 drawTextureMesh(left, top, right, bottom, texture->id, alpha / 255.0f, mode, 1464 texture->blend, (GLvoid*) NULL, (GLvoid*) gMeshTextureOffset, 1465 GL_TRIANGLE_STRIP, gMeshCount); 1466} 1467 1468void OpenGLRenderer::drawTextureRect(float left, float top, float right, float bottom, 1469 GLuint texture, float alpha, SkXfermode::Mode mode, bool blend) { 1470 drawTextureMesh(left, top, right, bottom, texture, alpha, mode, blend, 1471 (GLvoid*) NULL, (GLvoid*) gMeshTextureOffset, GL_TRIANGLE_STRIP, gMeshCount); 1472} 1473 1474void OpenGLRenderer::drawTextureMesh(float left, float top, float right, float bottom, 1475 GLuint texture, float alpha, SkXfermode::Mode mode, bool blend, 1476 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 1477 bool swapSrcDst, bool ignoreTransform, GLuint vbo, bool ignoreScale, bool dirty) { 1478 setupDraw(); 1479 1480 ProgramDescription description; 1481 description.hasTexture = true; 1482 const bool setColor = description.setColor(alpha, alpha, alpha, alpha); 1483 if (mColorFilter) { 1484 mColorFilter->describe(description, mCaches.extensions); 1485 } 1486 1487 mModelView.loadTranslate(left, top, 0.0f); 1488 if (!ignoreScale) { 1489 mModelView.scale(right - left, bottom - top, 1.0f); 1490 } 1491 1492 chooseBlending(blend || alpha < 1.0f, mode, description, swapSrcDst); 1493 1494 useProgram(mCaches.programCache.get(description)); 1495 if (!ignoreTransform) { 1496 mCaches.currentProgram->set(mOrthoMatrix, mModelView, *mSnapshot->transform); 1497 if (dirty) dirtyLayer(left, top, right, bottom, *mSnapshot->transform); 1498 } else { 1499 mat4 identity; 1500 mCaches.currentProgram->set(mOrthoMatrix, mModelView, identity); 1501 if (dirty) dirtyLayer(left, top, right, bottom); 1502 } 1503 1504 // Texture 1505 bindTexture(texture); 1506 glUniform1i(mCaches.currentProgram->getUniform("sampler"), 0); 1507 1508 // Always premultiplied 1509 if (setColor) { 1510 mCaches.currentProgram->setColor(alpha, alpha, alpha, alpha); 1511 } 1512 1513 // Mesh 1514 int texCoordsSlot = mCaches.currentProgram->getAttrib("texCoords"); 1515 glEnableVertexAttribArray(texCoordsSlot); 1516 1517 if (!vertices) { 1518 mCaches.bindMeshBuffer(vbo == 0 ? mCaches.meshBuffer : vbo); 1519 } else { 1520 mCaches.unbindMeshBuffer(); 1521 } 1522 glVertexAttribPointer(mCaches.currentProgram->position, 2, GL_FLOAT, GL_FALSE, 1523 gMeshStride, vertices); 1524 glVertexAttribPointer(texCoordsSlot, 2, GL_FLOAT, GL_FALSE, gMeshStride, texCoords); 1525 1526 // Color filter 1527 if (mColorFilter) { 1528 mColorFilter->setupProgram(mCaches.currentProgram); 1529 } 1530 1531 glDrawArrays(drawMode, 0, elementsCount); 1532 glDisableVertexAttribArray(texCoordsSlot); 1533} 1534 1535void OpenGLRenderer::chooseBlending(bool blend, SkXfermode::Mode mode, 1536 ProgramDescription& description, bool swapSrcDst) { 1537 blend = blend || mode != SkXfermode::kSrcOver_Mode; 1538 if (blend) { 1539 if (mode < SkXfermode::kPlus_Mode) { 1540 if (!mCaches.blend) { 1541 glEnable(GL_BLEND); 1542 } 1543 1544 GLenum sourceMode = swapSrcDst ? gBlendsSwap[mode].src : gBlends[mode].src; 1545 GLenum destMode = swapSrcDst ? gBlendsSwap[mode].dst : gBlends[mode].dst; 1546 1547 if (sourceMode != mCaches.lastSrcMode || destMode != mCaches.lastDstMode) { 1548 glBlendFunc(sourceMode, destMode); 1549 mCaches.lastSrcMode = sourceMode; 1550 mCaches.lastDstMode = destMode; 1551 } 1552 } else { 1553 // These blend modes are not supported by OpenGL directly and have 1554 // to be implemented using shaders. Since the shader will perform 1555 // the blending, turn blending off here 1556 if (mCaches.extensions.hasFramebufferFetch()) { 1557 description.framebufferMode = mode; 1558 description.swapSrcDst = swapSrcDst; 1559 } 1560 1561 if (mCaches.blend) { 1562 glDisable(GL_BLEND); 1563 } 1564 blend = false; 1565 } 1566 } else if (mCaches.blend) { 1567 glDisable(GL_BLEND); 1568 } 1569 mCaches.blend = blend; 1570} 1571 1572bool OpenGLRenderer::useProgram(Program* program) { 1573 if (!program->isInUse()) { 1574 if (mCaches.currentProgram != NULL) mCaches.currentProgram->remove(); 1575 program->use(); 1576 mCaches.currentProgram = program; 1577 return false; 1578 } 1579 return true; 1580} 1581 1582void OpenGLRenderer::resetDrawTextureTexCoords(float u1, float v1, float u2, float v2) { 1583 TextureVertex* v = &mMeshVertices[0]; 1584 TextureVertex::setUV(v++, u1, v1); 1585 TextureVertex::setUV(v++, u2, v1); 1586 TextureVertex::setUV(v++, u1, v2); 1587 TextureVertex::setUV(v++, u2, v2); 1588} 1589 1590void OpenGLRenderer::getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 1591 if (paint) { 1592 if (!mCaches.extensions.hasFramebufferFetch()) { 1593 const bool isMode = SkXfermode::IsMode(paint->getXfermode(), mode); 1594 if (!isMode) { 1595 // Assume SRC_OVER 1596 *mode = SkXfermode::kSrcOver_Mode; 1597 } 1598 } else { 1599 *mode = getXfermode(paint->getXfermode()); 1600 } 1601 1602 // Skia draws using the color's alpha channel if < 255 1603 // Otherwise, it uses the paint's alpha 1604 int color = paint->getColor(); 1605 *alpha = (color >> 24) & 0xFF; 1606 if (*alpha == 255) { 1607 *alpha = paint->getAlpha(); 1608 } 1609 } else { 1610 *mode = SkXfermode::kSrcOver_Mode; 1611 *alpha = 255; 1612 } 1613} 1614 1615SkXfermode::Mode OpenGLRenderer::getXfermode(SkXfermode* mode) { 1616 if (mode == NULL) { 1617 return SkXfermode::kSrcOver_Mode; 1618 } 1619 return mode->fMode; 1620} 1621 1622void OpenGLRenderer::setTextureWrapModes(Texture* texture, GLenum wrapS, GLenum wrapT) { 1623 bool bound = false; 1624 if (wrapS != texture->wrapS) { 1625 glBindTexture(GL_TEXTURE_2D, texture->id); 1626 bound = true; 1627 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapS); 1628 texture->wrapS = wrapS; 1629 } 1630 if (wrapT != texture->wrapT) { 1631 if (!bound) { 1632 glBindTexture(GL_TEXTURE_2D, texture->id); 1633 } 1634 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapT); 1635 texture->wrapT = wrapT; 1636 } 1637} 1638 1639}; // namespace uirenderer 1640}; // namespace android 1641