libs/hwui/LayerRenderer.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #define LOG_TAG "OpenGLRenderer"

 #include "LayerRenderer.h"
 #include "Properties.h"

 namespace android {
 namespace uirenderer {

 ///////////////////////////////////////////////////////////////////////////////
 // Rendering
 ///////////////////////////////////////////////////////////////////////////////

 void LayerRenderer::prepareDirty(float left, float top, float right, float bottom, bool opaque) {
     LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->fbo);

 #if RENDER_LAYERS_AS_REGIONS
     mLayer->region.clear();
 #endif

     glBindFramebuffer(GL_FRAMEBUFFER, mLayer->fbo);

     OpenGLRenderer::prepareDirty(0.0f, 0.0f, mLayer->width, mLayer->height, opaque);
 }

 void LayerRenderer::finish() {
     OpenGLRenderer::finish();

     generateMesh();

     LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->fbo);

     // No need to unbind our FBO, this will be taken care of by the caller
     // who will invoke OpenGLRenderer::resume()
 }

 GLint LayerRenderer::getTargetFbo() {
     return mLayer->fbo;
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Dirty region tracking
 ///////////////////////////////////////////////////////////////////////////////

 bool LayerRenderer::hasLayer() {
     return true;
 }

 Region* LayerRenderer::getRegion() {
 #if RENDER_LAYERS_AS_REGIONS
     if (getSnapshot()->flags & Snapshot::kFlagFboTarget) {
         return OpenGLRenderer::getRegion();
     }
     return &mLayer->region;
 #else
     return OpenGLRenderer::getRegion();
 #endif
 }

 void LayerRenderer::generateMesh() {
 #if RENDER_LAYERS_AS_REGIONS
     if (mLayer->region.isRect() || mLayer->region.isEmpty()) {
         if (mLayer->mesh) {
             delete mLayer->mesh;
             delete mLayer->meshIndices;

             mLayer->mesh = NULL;
             mLayer->meshIndices = NULL;
             mLayer->meshElementCount = 0;
         }
         return;
     }

     size_t count;
     const android::Rect* rects = mLayer->region.getArray(&count);

     GLsizei elementCount = count * 6;

     if (mLayer->mesh && mLayer->meshElementCount < elementCount) {
         delete mLayer->mesh;
         delete mLayer->meshIndices;

         mLayer->mesh = NULL;
         mLayer->meshIndices = NULL;
     }

     if (!mLayer->mesh) {
         mLayer->mesh = new TextureVertex[count * 4];
         mLayer->meshIndices = new uint16_t[elementCount];
         mLayer->meshElementCount = elementCount;
     }

     const float texX = 1.0f / float(mLayer->width);
     const float texY = 1.0f / float(mLayer->height);
     const float height = mLayer->layer.getHeight();

     TextureVertex* mesh = mLayer->mesh;
     uint16_t* indices = mLayer->meshIndices;

     for (size_t i = 0; i < count; i++) {
         const android::Rect* r = &rects[i];

         const float u1 = r->left * texX;
         const float v1 = (height - r->top) * texY;
         const float u2 = r->right * texX;
         const float v2 = (height - r->bottom) * texY;

         TextureVertex::set(mesh++, r->left, r->top, u1, v1);
         TextureVertex::set(mesh++, r->right, r->top, u2, v1);
         TextureVertex::set(mesh++, r->left, r->bottom, u1, v2);
         TextureVertex::set(mesh++, r->right, r->bottom, u2, v2);

         uint16_t quad = i * 4;
         int index = i * 6;
         indices[index    ] = quad;       // top-left
         indices[index + 1] = quad + 1;   // top-right
         indices[index + 2] = quad + 2;   // bottom-left
         indices[index + 3] = quad + 2;   // bottom-left
         indices[index + 4] = quad + 1;   // top-right
         indices[index + 5] = quad + 3;   // bottom-right
     }
 #endif
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Layers management
 ///////////////////////////////////////////////////////////////////////////////

 Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) {
     LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height);

     Layer* layer = new Layer(width, height);

     GLuint previousFbo;
     glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);

     glGenFramebuffers(1, &layer->fbo);
     glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo);

     if (glGetError() != GL_NO_ERROR) {
         glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
         glDeleteBuffers(1, &layer->fbo);
         return 0;
     }

     glActiveTexture(GL_TEXTURE0);
     glGenTextures(1, &layer->texture);
     glBindTexture(GL_TEXTURE_2D, layer->texture);

     glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
             GL_RGBA, GL_UNSIGNED_BYTE, NULL);

     if (glGetError() != GL_NO_ERROR) {
         glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
         glDeleteBuffers(1, &layer->fbo);
         glDeleteTextures(1, &layer->texture);
         delete layer;
         return 0;
     }

     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
             layer->texture, 0);

     if (glGetError() != GL_NO_ERROR) {
         glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
         glDeleteBuffers(1, &layer->fbo);
         glDeleteTextures(1, &layer->texture);
         delete layer;
         return 0;
     }

     glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);

     layer->layer.set(0.0f, 0.0f, width, height);
     layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f);
     layer->alpha = 255;
     layer->mode = SkXfermode::kSrcOver_Mode;
     layer->blend = !isOpaque;
     layer->empty = false;
     layer->colorFilter = NULL;

     return layer;
 }

 bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) {
     if (layer) {
         LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->fbo, width, height);

         glActiveTexture(GL_TEXTURE0);
         glBindTexture(GL_TEXTURE_2D, layer->texture);

         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
                 GL_RGBA, GL_UNSIGNED_BYTE, NULL);

         if (glGetError() != GL_NO_ERROR) {
             glDeleteBuffers(1, &layer->fbo);
             glDeleteTextures(1, &layer->texture);

             layer->width = 0;
             layer->height = 0;
             layer->fbo = 0;
             layer->texture = 0;

             return false;
         }

         layer->width = width;
         layer->height = height;
     }
     return true;
 }

 void LayerRenderer::destroyLayer(Layer* layer) {
     if (layer) {
         LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", layer->fbo);

         if (layer->fbo) glDeleteFramebuffers(1, &layer->fbo);
         if (layer->texture) glDeleteTextures(1, &layer->texture);

         delete layer;
     }
 }

 void LayerRenderer::destroyLayerDeferred(Layer* layer) {
     if (layer) {
         LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->fbo);

         Caches::getInstance().deleteLayerDeferred(layer);
     }
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#define LOG_TAG "OpenGLRenderer"

	#include "LayerRenderer.h"
	#include "Properties.h"

	namespace android {
	namespace uirenderer {

	///////////////////////////////////////////////////////////////////////////////
	// Rendering
	///////////////////////////////////////////////////////////////////////////////

	void LayerRenderer::prepareDirty(float left, float top, float right, float bottom, bool opaque) {
	LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->fbo);

	#if RENDER_LAYERS_AS_REGIONS
	mLayer->region.clear();
	#endif

	glBindFramebuffer(GL_FRAMEBUFFER, mLayer->fbo);

	OpenGLRenderer::prepareDirty(0.0f, 0.0f, mLayer->width, mLayer->height, opaque);
	}

	void LayerRenderer::finish() {
	OpenGLRenderer::finish();

	generateMesh();

	LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->fbo);

	// No need to unbind our FBO, this will be taken care of by the caller
	// who will invoke OpenGLRenderer::resume()
	}

	GLint LayerRenderer::getTargetFbo() {
	return mLayer->fbo;
	}

	///////////////////////////////////////////////////////////////////////////////
	// Dirty region tracking
	///////////////////////////////////////////////////////////////////////////////

	bool LayerRenderer::hasLayer() {
	return true;
	}

	Region* LayerRenderer::getRegion() {
	#if RENDER_LAYERS_AS_REGIONS
	if (getSnapshot()->flags & Snapshot::kFlagFboTarget) {
	return OpenGLRenderer::getRegion();
	}
	return &mLayer->region;
	#else
	return OpenGLRenderer::getRegion();
	#endif
	}

	void LayerRenderer::generateMesh() {
	#if RENDER_LAYERS_AS_REGIONS
	if (mLayer->region.isRect() \|\| mLayer->region.isEmpty()) {
	if (mLayer->mesh) {
	delete mLayer->mesh;
	delete mLayer->meshIndices;

	mLayer->mesh = NULL;
	mLayer->meshIndices = NULL;
	mLayer->meshElementCount = 0;
	}
	return;
	}

	size_t count;
	const android::Rect* rects = mLayer->region.getArray(&count);

	GLsizei elementCount = count * 6;

	if (mLayer->mesh && mLayer->meshElementCount < elementCount) {
	delete mLayer->mesh;
	delete mLayer->meshIndices;

	mLayer->mesh = NULL;
	mLayer->meshIndices = NULL;
	}

	if (!mLayer->mesh) {
	mLayer->mesh = new TextureVertex[count * 4];
	mLayer->meshIndices = new uint16_t[elementCount];
	mLayer->meshElementCount = elementCount;
	}

	const float texX = 1.0f / float(mLayer->width);
	const float texY = 1.0f / float(mLayer->height);
	const float height = mLayer->layer.getHeight();

	TextureVertex* mesh = mLayer->mesh;
	uint16_t* indices = mLayer->meshIndices;

	for (size_t i = 0; i < count; i++) {
	const android::Rect* r = &rects[i];

	const float u1 = r->left * texX;
	const float v1 = (height - r->top) * texY;
	const float u2 = r->right * texX;
	const float v2 = (height - r->bottom) * texY;

	TextureVertex::set(mesh++, r->left, r->top, u1, v1);
	TextureVertex::set(mesh++, r->right, r->top, u2, v1);
	TextureVertex::set(mesh++, r->left, r->bottom, u1, v2);
	TextureVertex::set(mesh++, r->right, r->bottom, u2, v2);

	uint16_t quad = i * 4;
	int index = i * 6;
	indices[index ] = quad; // top-left
	indices[index + 1] = quad + 1; // top-right
	indices[index + 2] = quad + 2; // bottom-left
	indices[index + 3] = quad + 2; // bottom-left
	indices[index + 4] = quad + 1; // top-right
	indices[index + 5] = quad + 3; // bottom-right
	}
	#endif
	}

	///////////////////////////////////////////////////////////////////////////////
	// Layers management
	///////////////////////////////////////////////////////////////////////////////

	Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) {
	LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height);

	Layer* layer = new Layer(width, height);

	GLuint previousFbo;
	glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);

	glGenFramebuffers(1, &layer->fbo);
	glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo);

	if (glGetError() != GL_NO_ERROR) {
	glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
	glDeleteBuffers(1, &layer->fbo);
	return 0;
	}

	glActiveTexture(GL_TEXTURE0);
	glGenTextures(1, &layer->texture);
	glBindTexture(GL_TEXTURE_2D, layer->texture);

	glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
	GL_RGBA, GL_UNSIGNED_BYTE, NULL);

	if (glGetError() != GL_NO_ERROR) {
	glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
	glDeleteBuffers(1, &layer->fbo);
	glDeleteTextures(1, &layer->texture);
	delete layer;
	return 0;
	}

	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
	layer->texture, 0);

	if (glGetError() != GL_NO_ERROR) {
	glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
	glDeleteBuffers(1, &layer->fbo);
	glDeleteTextures(1, &layer->texture);
	delete layer;
	return 0;
	}

	glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);

	layer->layer.set(0.0f, 0.0f, width, height);
	layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f);
	layer->alpha = 255;
	layer->mode = SkXfermode::kSrcOver_Mode;
	layer->blend = !isOpaque;
	layer->empty = false;
	layer->colorFilter = NULL;

	return layer;
	}

	bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) {
	if (layer) {
	LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->fbo, width, height);

	glActiveTexture(GL_TEXTURE0);
	glBindTexture(GL_TEXTURE_2D, layer->texture);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
	GL_RGBA, GL_UNSIGNED_BYTE, NULL);

	if (glGetError() != GL_NO_ERROR) {
	glDeleteBuffers(1, &layer->fbo);
	glDeleteTextures(1, &layer->texture);

	layer->width = 0;
	layer->height = 0;
	layer->fbo = 0;
	layer->texture = 0;

	return false;
	}

	layer->width = width;
	layer->height = height;
	}
	return true;
	}

	void LayerRenderer::destroyLayer(Layer* layer) {
	if (layer) {
	LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", layer->fbo);

	if (layer->fbo) glDeleteFramebuffers(1, &layer->fbo);
	if (layer->texture) glDeleteTextures(1, &layer->texture);

	delete layer;
	}
	}

	void LayerRenderer::destroyLayerDeferred(Layer* layer) {
	if (layer) {
	LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->fbo);

	Caches::getInstance().deleteLayerDeferred(layer);
	}
	}

	}; // namespace uirenderer
	}; // namespace android