ce483cb074
An empty dirty region, which initiates tile rendering (non-preserved with full viewport) but with no updates from the view hierarchy leading to uninitialized content on the screen CR's Fixed:357662 (cherry picked from commit 66ceabd31fcd49c344b468a138438fe3d226f515) Change-Id: Ieaa357ee2951aa8286ab1fe0f96b3d99bc424a3b
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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* Copyright (c) 2011 Code Aurora Forum. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <GLES2/gl2.h>
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#include <EGL/egl.h>
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#include <gl2ext.h>
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#include <OpenGLRenderer.h>
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#include "tilerenderer.h"
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namespace android {
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ANDROID_SINGLETON_STATIC_INSTANCE(uirenderer::TileRenderer) ;
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namespace uirenderer {
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TileRenderer::TileRenderer() {
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mIsTiled = false;
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}
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TileRenderer::~TileRenderer() {
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}
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void TileRenderer::startTileRendering(OpenGLRenderer* renderer,
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int left, int top,
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int right, int bottom) {
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int width = 0;
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int height = 0;
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GLenum status = GL_NO_ERROR;
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int preserve = 0;
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if (renderer != NULL) {
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renderer->getViewport(width, height);
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}
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if (!left && !right && !top && !bottom) {
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left = 0;
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top = 0;
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right = width;
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bottom = height;
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preserve = 1;
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}
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if (!left && !right && !top && !bottom) {
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//can't do tile rendering
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LOGE("can't tile render; drity region, width, height not available");
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return;
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}
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int l = left, t = (height - bottom), w = (right - left), h = (bottom - top);
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if (l < 0 || t < 0) {
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l = (l < 0) ? 0 : l;
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t = (t < 0) ? 0 : t;
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preserve = 1;
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}
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if (w > width || h > height) {
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w = (w > width) ? width : w;
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h = (h > height) ? height : h;
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preserve = 1;
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}
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//clear off all errors before tiling, if any
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while ((status = glGetError()) != GL_NO_ERROR);
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if (preserve)
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glStartTilingQCOM(l, t, w, h, GL_COLOR_BUFFER_BIT0_QCOM);
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else
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glStartTilingQCOM(l, t, w, h, GL_NONE);
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status = glGetError();
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if (status == GL_NO_ERROR)
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mIsTiled = true;
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}
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void TileRenderer::endTileRendering(OpenGLRenderer*) {
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if (!mIsTiled) {
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return;
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}
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glEndTilingQCOM(GL_COLOR_BUFFER_BIT0_QCOM);
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mIsTiled = false;
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GLenum status = GL_NO_ERROR;
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while ((status = glGetError()) != GL_NO_ERROR);
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}
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}; // namespace uirenderer
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}; // namespace android
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