147 lines
4.4 KiB
C++
147 lines
4.4 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", mFbo);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &mPreviousFbo);
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glBindFramebuffer(GL_FRAMEBUFFER, mFbo);
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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", mFbo);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static functions
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///////////////////////////////////////////////////////////////////////////////
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GLuint LayerRenderer::createLayer(uint32_t width, uint32_t height,
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uint32_t* layerWidth, uint32_t* layerHeight, GLuint* texture) {
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LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height);
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GLuint previousFbo;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
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GLuint fbo = 0;
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glGenFramebuffers(1, &fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, fbo);
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if (glGetError() != GL_NO_ERROR) {
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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glDeleteBuffers(1, &fbo);
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return 0;
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}
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glActiveTexture(GL_TEXTURE0);
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glGenTextures(1, texture);
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glBindTexture(GL_TEXTURE_2D, *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, &fbo);
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glDeleteTextures(1, texture);
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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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*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, &fbo);
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glDeleteTextures(1, texture);
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return 0;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
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*layerWidth = width;
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*layerHeight = height;
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return fbo;
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}
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void LayerRenderer::resizeLayer(GLuint fbo, GLuint texture, uint32_t width, uint32_t height,
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uint32_t* layerWidth, uint32_t* layerHeight) {
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LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", fbo, width, height);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, 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, &fbo);
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glDeleteTextures(1, &texture);
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*layerWidth = 0;
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*layerHeight = 0;
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return;
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}
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*layerWidth = width;
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*layerHeight = height;
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}
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void LayerRenderer::destroyLayer(GLuint fbo, GLuint texture) {
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LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", fbo);
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if (fbo) glDeleteFramebuffers(1, &fbo);
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if (texture) glDeleteTextures(1, &texture);
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}
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void LayerRenderer::destroyLayerDeferred(GLuint fbo, GLuint texture) {
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LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", fbo);
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Caches& caches = Caches::getInstance();
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if (fbo) caches.deleteFboDeferred(fbo);
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if (texture) caches.deleteTextureDeferred(texture);
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}
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}; // namespace uirenderer
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}; // namespace android
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