165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik/* 265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * Copyright (C) 2015 The Android Open Source Project 365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * 465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * Licensed under the Apache License, Version 2.0 (the "License"); 565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * you may not use this file except in compliance with the License. 665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * You may obtain a copy of the License at 765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * 865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * http://www.apache.org/licenses/LICENSE-2.0 965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * 1065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * Unless required by applicable law or agreed to in writing, software 1165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * distributed under the License is distributed on an "AS IS" BASIS, 1265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * See the License for the specific language governing permissions and 1465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik * limitations under the License. 1565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik */ 1696a5c4c7bab6718524de7253da8309143ab48befChris Craik#include "renderstate/Scissor.h" 1765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 18e4db79de127cfe961195f52907af8451026eaa20Chris Craik#include "Rect.h" 19e4db79de127cfe961195f52907af8451026eaa20Chris Craik 20117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik#include <utils/Log.h> 21117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik 2265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craiknamespace android { 2365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craiknamespace uirenderer { 2465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 2565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris CraikScissor::Scissor() 2665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik : mEnabled(false) 2765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik , mScissorX(0) 2865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik , mScissorY(0) 2965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik , mScissorWidth(0) 3065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik , mScissorHeight(0) { 3165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} 3265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 3365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craikbool Scissor::setEnabled(bool enabled) { 3465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (mEnabled != enabled) { 3565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (enabled) { 3665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik glEnable(GL_SCISSOR_TEST); 3765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } else { 3865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik glDisable(GL_SCISSOR_TEST); 3965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 4065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mEnabled = enabled; 4165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik return true; 4265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 4365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik return false; 4465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} 4565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 4665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craikbool Scissor::set(GLint x, GLint y, GLint width, GLint height) { 4765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (mEnabled && (x != mScissorX || y != mScissorY 4865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik || width != mScissorWidth || height != mScissorHeight)) { 4965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 5065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (x < 0) { 5165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik width += x; 5265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik x = 0; 5365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 5465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (y < 0) { 5565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik height += y; 5665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik y = 0; 5765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 5865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (width < 0) { 5965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik width = 0; 6065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 6165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik if (height < 0) { 6265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik height = 0; 6365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 6465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik glScissor(x, y, width, height); 6565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 6665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mScissorX = x; 6765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mScissorY = y; 6865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mScissorWidth = width; 6965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mScissorHeight = height; 7065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 7165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik return true; 7265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik } 7365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik return false; 7465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} 7565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 76e4db79de127cfe961195f52907af8451026eaa20Chris Craikvoid Scissor::set(int viewportHeight, const Rect& clip) { 77e4db79de127cfe961195f52907af8451026eaa20Chris Craik // transform to Y-flipped GL space, and prevent negatives 78e4db79de127cfe961195f52907af8451026eaa20Chris Craik GLint x = std::max(0, (int)clip.left); 79e4db79de127cfe961195f52907af8451026eaa20Chris Craik GLint y = std::max(0, viewportHeight - (int)clip.bottom); 80e4db79de127cfe961195f52907af8451026eaa20Chris Craik GLint width = std::max(0, ((int)clip.right) - x); 81e4db79de127cfe961195f52907af8451026eaa20Chris Craik GLint height = std::max(0, (viewportHeight - (int)clip.top) - y); 82e4db79de127cfe961195f52907af8451026eaa20Chris Craik 83e4db79de127cfe961195f52907af8451026eaa20Chris Craik if (x != mScissorX 84e4db79de127cfe961195f52907af8451026eaa20Chris Craik || y != mScissorY 85e4db79de127cfe961195f52907af8451026eaa20Chris Craik || width != mScissorWidth 86e4db79de127cfe961195f52907af8451026eaa20Chris Craik || height != mScissorHeight) { 87e4db79de127cfe961195f52907af8451026eaa20Chris Craik glScissor(x, y, width, height); 88e4db79de127cfe961195f52907af8451026eaa20Chris Craik 89e4db79de127cfe961195f52907af8451026eaa20Chris Craik mScissorX = x; 90e4db79de127cfe961195f52907af8451026eaa20Chris Craik mScissorY = y; 91e4db79de127cfe961195f52907af8451026eaa20Chris Craik mScissorWidth = width; 92e4db79de127cfe961195f52907af8451026eaa20Chris Craik mScissorHeight = height; 93e4db79de127cfe961195f52907af8451026eaa20Chris Craik } 94e4db79de127cfe961195f52907af8451026eaa20Chris Craik} 95e4db79de127cfe961195f52907af8451026eaa20Chris Craik 9665fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craikvoid Scissor::reset() { 9765fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0; 9865fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} 9965fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 10065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craikvoid Scissor::invalidate() { 10165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik mEnabled = glIsEnabled(GL_SCISSOR_TEST); 10265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik setEnabled(true); 10365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik reset(); 10465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} 10565fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 106117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craikvoid Scissor::dump() { 107117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik ALOGD("Scissor: enabled %d, %d %d %d %d", 108117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik mEnabled, mScissorX, mScissorY, mScissorWidth, mScissorHeight); 109117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik} 110117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik 11165fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} /* namespace uirenderer */ 11265fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik} /* namespace android */ 11365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik 114