Glop.h revision 0519c810a56bded1284fcb2ae40f438878c6585f
1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_HWUI_GLOP_H 18#define ANDROID_HWUI_GLOP_H 19 20#include "FloatColor.h" 21#include "Matrix.h" 22#include "Rect.h" 23#include "utils/Macros.h" 24 25#include <GLES2/gl2.h> 26#include <GLES2/gl2ext.h> 27#include <SkXfermode.h> 28 29namespace android { 30namespace uirenderer { 31 32class Program; 33class RoundRectClipState; 34 35/* 36 * Enumerates optional vertex attributes 37 * 38 * Position is always enabled by MeshState, these other attributes 39 * are enabled/disabled dynamically based on mesh content. 40 */ 41enum VertexAttribFlags { 42 // NOTE: position attribute always enabled 43 kNone_Attrib = 0, 44 kTextureCoord_Attrib = 1 << 0, 45 kColor_Attrib = 1 << 1, 46 kAlpha_Attrib = 1 << 2, 47}; 48 49/** 50 * Structure containing all data required to issue an OpenGL draw 51 * 52 * Includes all of the mesh, fill, and GL state required to perform 53 * the operation. Pieces of data are either directly copied into the 54 * structure, or stored as a pointer or GL object reference to data 55 * managed. 56 * 57 * Eventually, a Glop should be able to be drawn multiple times from 58 * a single construction, up until GL context destruction. Currently, 59 * vertex/index/Texture/RoundRectClipState pointers prevent this from 60 * being safe. 61 */ 62// TODO: PREVENT_COPY_AND_ASSIGN(...) or similar 63struct Glop { 64 Rect bounds; 65 const RoundRectClipState* roundRectClipState; 66 67 /* 68 * Stores mesh - vertex and index data. 69 * 70 * buffer objects and void*s are mutually exclusive 71 * indices are optional, currently only GL_UNSIGNED_SHORT supported 72 */ 73 struct Mesh { 74 VertexAttribFlags vertexFlags; 75 GLuint primitiveMode; // GL_TRIANGLES and GL_TRIANGLE_STRIP supported 76 GLuint vertexBufferObject; 77 GLuint indexBufferObject; 78 const void* vertices; 79 const void* indices; 80 int elementCount; 81 GLsizei stride; 82 GLvoid* texCoordOffset; 83 TextureVertex mappedVertices[4]; 84 } mesh; 85 86 struct Fill { 87 Program* program; 88 Texture* texture; 89 GLenum textureFilter; 90 91 bool colorEnabled; 92 FloatColor color; 93 94 /* TODO 95 union shader { 96 //... 97 }; TODO 98 */ 99 ProgramDescription::ColorFilterMode filterMode; 100 union Filter { 101 struct Matrix { 102 float matrix[16]; 103 float vector[4]; 104 } matrix; 105 FloatColor color; 106 } filter; 107 } fill; 108 109 struct Transform { 110 Matrix4 ortho; // TODO: out of op, since this is static per FBO 111 Matrix4 modelView; 112 Matrix4 canvas; 113 bool fudgingOffset; 114 } transform; 115 116 struct Blend { 117 GLenum src; 118 GLenum dst; 119 } blend; 120 121 /** 122 * Additional render state to enumerate: 123 * - scissor + (bits for whether each of LTRB needed?) 124 * - stencil mode (draw into, mask, count, etc) 125 */ 126}; 127 128} /* namespace uirenderer */ 129} /* namespace android */ 130 131#endif // ANDROID_HWUI_GLOP_H 132