ada830f639
The new implementation relies on OpenGLRenderer's existing layer code instead of duplicating it. The new code is much cleaner, with simpler and better APIs and allows tracking of drawn regions inside layers. Region tracking is not yet enabled but this will be done in a future CL. Change-Id: Ie826121a2227de8252c77b992a61218defea5143
162 lines
4.8 KiB
C++
162 lines
4.8 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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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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#define LOG_TAG "OpenGLRenderer"
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#include "LayerRenderer.h"
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#include "Properties.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Rendering
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///////////////////////////////////////////////////////////////////////////////
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void LayerRenderer::prepare(bool opaque) {
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LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->fbo);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &mPreviousFbo);
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glBindFramebuffer(GL_FRAMEBUFFER, mLayer->fbo);
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OpenGLRenderer::prepare(opaque);
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}
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void LayerRenderer::finish() {
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OpenGLRenderer::finish();
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glBindFramebuffer(GL_FRAMEBUFFER, mPreviousFbo);
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LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->mFbo);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static functions
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///////////////////////////////////////////////////////////////////////////////
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Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) {
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LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height);
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Layer* layer = new Layer(width, height);
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GLuint previousFbo;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
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glGenFramebuffers(1, &layer->fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo);
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if (glGetError() != GL_NO_ERROR) {
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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glDeleteBuffers(1, &layer->fbo);
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return 0;
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}
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glActiveTexture(GL_TEXTURE0);
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glGenTextures(1, &layer->texture);
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glBindTexture(GL_TEXTURE_2D, layer->texture);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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if (glGetError() != GL_NO_ERROR) {
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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glDeleteBuffers(1, &layer->fbo);
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glDeleteTextures(1, &layer->texture);
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delete layer;
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return 0;
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}
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
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layer->texture, 0);
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if (glGetError() != GL_NO_ERROR) {
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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glDeleteBuffers(1, &layer->fbo);
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glDeleteTextures(1, &layer->texture);
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delete layer;
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return 0;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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layer->layer.set(0.0f, 0.0f, width, height);
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layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f);
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layer->alpha = 255;
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layer->mode = SkXfermode::kSrcOver_Mode;
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layer->blend = !isOpaque;
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layer->empty = false;
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layer->colorFilter = NULL;
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return layer;
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}
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bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) {
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if (layer) {
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LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->fbo, width, height);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, layer->texture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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if (glGetError() != GL_NO_ERROR) {
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glDeleteBuffers(1, &layer->fbo);
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glDeleteTextures(1, &layer->texture);
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layer->width = 0;
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layer->height = 0;
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layer->fbo = 0;
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layer->texture = 0;
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return false;
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}
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layer->width = width;
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layer->height = height;
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}
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return true;
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}
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void LayerRenderer::destroyLayer(Layer* layer) {
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if (layer) {
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LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", layer->fbo);
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if (layer->fbo) glDeleteFramebuffers(1, &layer->fbo);
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if (layer->texture) glDeleteTextures(1, &layer->texture);
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delete layer;
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}
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}
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void LayerRenderer::destroyLayerDeferred(Layer* layer) {
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if (layer) {
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LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->fbo);
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Caches::getInstance().deleteLayerDeferred(layer);
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}
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}
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}; // namespace uirenderer
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}; // namespace android
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