libs/hwui/Caches.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2010 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 <utils/Log.h>
 #include <utils/String8.h>

 #include "Caches.h"
 #include "DisplayListRenderer.h"
 #include "Properties.h"
 #include "LayerRenderer.h"

 namespace android {

 #ifdef USE_OPENGL_RENDERER
 using namespace uirenderer;
 ANDROID_SINGLETON_STATIC_INSTANCE(Caches);
 #endif

 namespace uirenderer {

 ///////////////////////////////////////////////////////////////////////////////
 // Macros
 ///////////////////////////////////////////////////////////////////////////////

 #if DEBUG_CACHE_FLUSH
     #define FLUSH_LOGD(...) ALOGD(__VA_ARGS__)
 #else
     #define FLUSH_LOGD(...)
 #endif

 ///////////////////////////////////////////////////////////////////////////////
 // Constructors/destructor
 ///////////////////////////////////////////////////////////////////////////////

 Caches::Caches(): Singleton<Caches>(), mInitialized(false) {
     init();
     initExtensions();
     initConstraints();

     mDebugLevel = readDebugLevel();
     ALOGD("Enabling debug mode %d", mDebugLevel);

 #if RENDER_LAYERS_AS_REGIONS
     INIT_LOGD("Layers will be composited as regions");
 #endif
 }

 void Caches::init() {
     if (mInitialized) return;

     glGenBuffers(1, &meshBuffer);
     glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
     glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);

     mCurrentBuffer = meshBuffer;
     mCurrentIndicesBuffer = 0;
     mCurrentPositionPointer = this;
     mCurrentTexCoordsPointer = this;

     mTexCoordsArrayEnabled = false;

     mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;

     glActiveTexture(gTextureUnits[0]);
     mTextureUnit = 0;

     mRegionMesh = NULL;

     blend = false;
     lastSrcMode = GL_ZERO;
     lastDstMode = GL_ZERO;
     currentProgram = NULL;

     mInitialized = true;
 }

 void Caches::initExtensions() {
     if (extensions.hasDebugMarker()) {
         eventMark = glInsertEventMarkerEXT;
         startMark = glPushGroupMarkerEXT;
         endMark = glPopGroupMarkerEXT;
     } else {
         eventMark = eventMarkNull;
         startMark = startMarkNull;
         endMark = endMarkNull;
     }

     if (extensions.hasDebugLabel()) {
         setLabel = glLabelObjectEXT;
         getLabel = glGetObjectLabelEXT;
     } else {
         setLabel = setLabelNull;
         getLabel = getLabelNull;
     }
 }

 void Caches::initConstraints() {
     GLint maxTextureUnits;
     glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
     if (maxTextureUnits < REQUIRED_TEXTURE_UNITS_COUNT) {
         ALOGW("At least %d texture units are required!", REQUIRED_TEXTURE_UNITS_COUNT);
     }

     glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
 }

 void Caches::terminate() {
     if (!mInitialized) return;

     glDeleteBuffers(1, &meshBuffer);
     mCurrentBuffer = 0;

     glDeleteBuffers(1, &mRegionMeshIndices);
     delete[] mRegionMesh;
     mRegionMesh = NULL;

     fboCache.clear();

     programCache.clear();
     currentProgram = NULL;

     mInitialized = false;
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Debug
 ///////////////////////////////////////////////////////////////////////////////

 void Caches::dumpMemoryUsage() {
     String8 stringLog;
     dumpMemoryUsage(stringLog);
     ALOGD("%s", stringLog.string());
 }

 void Caches::dumpMemoryUsage(String8 &log) {
     log.appendFormat("Current memory usage / total memory usage (bytes):\n");
     log.appendFormat("  TextureCache         %8d / %8d\n",
             textureCache.getSize(), textureCache.getMaxSize());
     log.appendFormat("  LayerCache           %8d / %8d\n",
             layerCache.getSize(), layerCache.getMaxSize());
     log.appendFormat("  GradientCache        %8d / %8d\n",
             gradientCache.getSize(), gradientCache.getMaxSize());
     log.appendFormat("  PathCache            %8d / %8d\n",
             pathCache.getSize(), pathCache.getMaxSize());
     log.appendFormat("  CircleShapeCache     %8d / %8d\n",
             circleShapeCache.getSize(), circleShapeCache.getMaxSize());
     log.appendFormat("  OvalShapeCache       %8d / %8d\n",
             ovalShapeCache.getSize(), ovalShapeCache.getMaxSize());
     log.appendFormat("  RoundRectShapeCache  %8d / %8d\n",
             roundRectShapeCache.getSize(), roundRectShapeCache.getMaxSize());
     log.appendFormat("  RectShapeCache       %8d / %8d\n",
             rectShapeCache.getSize(), rectShapeCache.getMaxSize());
     log.appendFormat("  ArcShapeCache        %8d / %8d\n",
             arcShapeCache.getSize(), arcShapeCache.getMaxSize());
     log.appendFormat("  TextDropShadowCache  %8d / %8d\n", dropShadowCache.getSize(),
             dropShadowCache.getMaxSize());
     for (uint32_t i = 0; i < fontRenderer.getFontRendererCount(); i++) {
         const uint32_t size = fontRenderer.getFontRendererSize(i);
         log.appendFormat("  FontRenderer %d       %8d / %8d\n", i, size, size);
     }
     log.appendFormat("Other:\n");
     log.appendFormat("  FboCache             %8d / %8d\n",
             fboCache.getSize(), fboCache.getMaxSize());
     log.appendFormat("  PatchCache           %8d / %8d\n",
             patchCache.getSize(), patchCache.getMaxSize());

     uint32_t total = 0;
     total += textureCache.getSize();
     total += layerCache.getSize();
     total += gradientCache.getSize();
     total += pathCache.getSize();
     total += dropShadowCache.getSize();
     total += roundRectShapeCache.getSize();
     total += circleShapeCache.getSize();
     total += ovalShapeCache.getSize();
     total += rectShapeCache.getSize();
     total += arcShapeCache.getSize();
     for (uint32_t i = 0; i < fontRenderer.getFontRendererCount(); i++) {
         total += fontRenderer.getFontRendererSize(i);
     }

     log.appendFormat("Total memory usage:\n");
     log.appendFormat("  %d bytes, %.2f MB\n", total, total / 1024.0f / 1024.0f);
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Memory management
 ///////////////////////////////////////////////////////////////////////////////

 void Caches::clearGarbage() {
     textureCache.clearGarbage();
     pathCache.clearGarbage();

     Mutex::Autolock _l(mGarbageLock);

     size_t count = mLayerGarbage.size();
     for (size_t i = 0; i < count; i++) {
         Layer* layer = mLayerGarbage.itemAt(i);
         LayerRenderer::destroyLayer(layer);
     }
     mLayerGarbage.clear();

     count = mDisplayListGarbage.size();
     for (size_t i = 0; i < count; i++) {
         DisplayList* displayList = mDisplayListGarbage.itemAt(i);
         delete displayList;
     }
     mDisplayListGarbage.clear();
 }

 void Caches::deleteLayerDeferred(Layer* layer) {
     Mutex::Autolock _l(mGarbageLock);
     mLayerGarbage.push(layer);
 }

 void Caches::deleteDisplayListDeferred(DisplayList* displayList) {
     Mutex::Autolock _l(mGarbageLock);
     mDisplayListGarbage.push(displayList);
 }

 void Caches::flush(FlushMode mode) {
     FLUSH_LOGD("Flushing caches (mode %d)", mode);

     clearGarbage();

     switch (mode) {
         case kFlushMode_Full:
             textureCache.clear();
             patchCache.clear();
             dropShadowCache.clear();
             gradientCache.clear();
             fontRenderer.clear();
             // fall through
         case kFlushMode_Moderate:
             fontRenderer.flush();
             textureCache.flush();
             pathCache.clear();
             roundRectShapeCache.clear();
             circleShapeCache.clear();
             ovalShapeCache.clear();
             rectShapeCache.clear();
             arcShapeCache.clear();
             // fall through
         case kFlushMode_Layers:
             layerCache.clear();
             break;
     }
 }

 ///////////////////////////////////////////////////////////////////////////////
 // VBO
 ///////////////////////////////////////////////////////////////////////////////

 bool Caches::bindMeshBuffer() {
     return bindMeshBuffer(meshBuffer);
 }

 bool Caches::bindMeshBuffer(const GLuint buffer) {
     if (mCurrentBuffer != buffer) {
         glBindBuffer(GL_ARRAY_BUFFER, buffer);
         mCurrentBuffer = buffer;
         return true;
     }
     return false;
 }

 bool Caches::unbindMeshBuffer() {
     if (mCurrentBuffer) {
         glBindBuffer(GL_ARRAY_BUFFER, 0);
         mCurrentBuffer = 0;
         return true;
     }
     return false;
 }

 bool Caches::bindIndicesBuffer(const GLuint buffer) {
     if (mCurrentIndicesBuffer != buffer) {
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
         mCurrentIndicesBuffer = buffer;
         return true;
     }
     return false;
 }

 bool Caches::unbindIndicesBuffer() {
     if (mCurrentIndicesBuffer) {
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
         mCurrentIndicesBuffer = 0;
         return true;
     }
     return false;
 }

 void Caches::bindPositionVertexPointer(bool force, GLuint slot, GLvoid* vertices, GLsizei stride) {
     if (force || vertices != mCurrentPositionPointer) {
         glVertexAttribPointer(slot, 2, GL_FLOAT, GL_FALSE, stride, vertices);
         mCurrentPositionPointer = vertices;
     }
 }

 void Caches::bindTexCoordsVertexPointer(bool force, GLuint slot, GLvoid* vertices) {
     if (force || vertices != mCurrentTexCoordsPointer) {
         glVertexAttribPointer(slot, 2, GL_FLOAT, GL_FALSE, gMeshStride, vertices);
         mCurrentTexCoordsPointer = vertices;
     }
 }

 void Caches::resetVertexPointers() {
     mCurrentPositionPointer = this;
     mCurrentTexCoordsPointer = this;
 }

 void Caches::resetTexCoordsVertexPointer() {
     mCurrentTexCoordsPointer = this;
 }

 void Caches::enableTexCoordsVertexArray() {
     if (!mTexCoordsArrayEnabled) {
         glEnableVertexAttribArray(Program::kBindingTexCoords);
         mCurrentTexCoordsPointer = this;
         mTexCoordsArrayEnabled = true;
     }
 }

 void Caches::disbaleTexCoordsVertexArray() {
     if (mTexCoordsArrayEnabled) {
         glDisableVertexAttribArray(Program::kBindingTexCoords);
         mTexCoordsArrayEnabled = false;
     }
 }

 void Caches::activeTexture(GLuint textureUnit) {
     if (mTextureUnit != textureUnit) {
         glActiveTexture(gTextureUnits[textureUnit]);
         mTextureUnit = textureUnit;
     }
 }

 void Caches::setScissor(GLint x, GLint y, GLint width, GLint height) {
     if (x != mScissorX || y != mScissorY || width != mScissorWidth || height != mScissorHeight) {
         glScissor(x, y, width, height);

         mScissorX = x;
         mScissorY = y;
         mScissorWidth = width;
         mScissorHeight = height;
     }
 }

 void Caches::resetScissor() {
     mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;
 }

 TextureVertex* Caches::getRegionMesh() {
     // Create the mesh, 2 triangles and 4 vertices per rectangle in the region
     if (!mRegionMesh) {
         mRegionMesh = new TextureVertex[REGION_MESH_QUAD_COUNT * 4];

         uint16_t* regionIndices = new uint16_t[REGION_MESH_QUAD_COUNT * 6];
         for (int i = 0; i < REGION_MESH_QUAD_COUNT; i++) {
             uint16_t quad = i * 4;
             int index = i * 6;
             regionIndices[index    ] = quad;       // top-left
             regionIndices[index + 1] = quad + 1;   // top-right
             regionIndices[index + 2] = quad + 2;   // bottom-left
             regionIndices[index + 3] = quad + 2;   // bottom-left
             regionIndices[index + 4] = quad + 1;   // top-right
             regionIndices[index + 5] = quad + 3;   // bottom-right
         }

         glGenBuffers(1, &mRegionMeshIndices);
         bindIndicesBuffer(mRegionMeshIndices);
         glBufferData(GL_ELEMENT_ARRAY_BUFFER, REGION_MESH_QUAD_COUNT * 6 * sizeof(uint16_t),
                 regionIndices, GL_STATIC_DRAW);

         delete[] regionIndices;
     } else {
         bindIndicesBuffer(mRegionMeshIndices);
     }

     return mRegionMesh;
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2010 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 <utils/Log.h>
	#include <utils/String8.h>

	#include "Caches.h"
	#include "DisplayListRenderer.h"
	#include "Properties.h"
	#include "LayerRenderer.h"

	namespace android {

	#ifdef USE_OPENGL_RENDERER
	using namespace uirenderer;
	ANDROID_SINGLETON_STATIC_INSTANCE(Caches);
	#endif

	namespace uirenderer {

	///////////////////////////////////////////////////////////////////////////////
	// Macros
	///////////////////////////////////////////////////////////////////////////////

	#if DEBUG_CACHE_FLUSH
	#define FLUSH_LOGD(...) ALOGD(__VA_ARGS__)
	#else
	#define FLUSH_LOGD(...)
	#endif

	///////////////////////////////////////////////////////////////////////////////
	// Constructors/destructor
	///////////////////////////////////////////////////////////////////////////////

	Caches::Caches(): Singleton<Caches>(), mInitialized(false) {
	init();
	initExtensions();
	initConstraints();

	mDebugLevel = readDebugLevel();
	ALOGD("Enabling debug mode %d", mDebugLevel);

	#if RENDER_LAYERS_AS_REGIONS
	INIT_LOGD("Layers will be composited as regions");
	#endif
	}

	void Caches::init() {
	if (mInitialized) return;

	glGenBuffers(1, &meshBuffer);
	glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
	glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);

	mCurrentBuffer = meshBuffer;
	mCurrentIndicesBuffer = 0;
	mCurrentPositionPointer = this;
	mCurrentTexCoordsPointer = this;

	mTexCoordsArrayEnabled = false;

	mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;

	glActiveTexture(gTextureUnits[0]);
	mTextureUnit = 0;

	mRegionMesh = NULL;

	blend = false;
	lastSrcMode = GL_ZERO;
	lastDstMode = GL_ZERO;
	currentProgram = NULL;

	mInitialized = true;
	}

	void Caches::initExtensions() {
	if (extensions.hasDebugMarker()) {
	eventMark = glInsertEventMarkerEXT;
	startMark = glPushGroupMarkerEXT;
	endMark = glPopGroupMarkerEXT;
	} else {
	eventMark = eventMarkNull;
	startMark = startMarkNull;
	endMark = endMarkNull;
	}

	if (extensions.hasDebugLabel()) {
	setLabel = glLabelObjectEXT;
	getLabel = glGetObjectLabelEXT;
	} else {
	setLabel = setLabelNull;
	getLabel = getLabelNull;
	}
	}

	void Caches::initConstraints() {
	GLint maxTextureUnits;
	glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
	if (maxTextureUnits < REQUIRED_TEXTURE_UNITS_COUNT) {
	ALOGW("At least %d texture units are required!", REQUIRED_TEXTURE_UNITS_COUNT);
	}

	glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
	}

	void Caches::terminate() {
	if (!mInitialized) return;

	glDeleteBuffers(1, &meshBuffer);
	mCurrentBuffer = 0;

	glDeleteBuffers(1, &mRegionMeshIndices);
	delete[] mRegionMesh;
	mRegionMesh = NULL;

	fboCache.clear();

	programCache.clear();
	currentProgram = NULL;

	mInitialized = false;
	}

	///////////////////////////////////////////////////////////////////////////////
	// Debug
	///////////////////////////////////////////////////////////////////////////////

	void Caches::dumpMemoryUsage() {
	String8 stringLog;
	dumpMemoryUsage(stringLog);
	ALOGD("%s", stringLog.string());
	}

	void Caches::dumpMemoryUsage(String8 &log) {
	log.appendFormat("Current memory usage / total memory usage (bytes):\n");
	log.appendFormat(" TextureCache %8d / %8d\n",
	textureCache.getSize(), textureCache.getMaxSize());
	log.appendFormat(" LayerCache %8d / %8d\n",
	layerCache.getSize(), layerCache.getMaxSize());
	log.appendFormat(" GradientCache %8d / %8d\n",
	gradientCache.getSize(), gradientCache.getMaxSize());
	log.appendFormat(" PathCache %8d / %8d\n",
	pathCache.getSize(), pathCache.getMaxSize());
	log.appendFormat(" CircleShapeCache %8d / %8d\n",
	circleShapeCache.getSize(), circleShapeCache.getMaxSize());
	log.appendFormat(" OvalShapeCache %8d / %8d\n",
	ovalShapeCache.getSize(), ovalShapeCache.getMaxSize());
	log.appendFormat(" RoundRectShapeCache %8d / %8d\n",
	roundRectShapeCache.getSize(), roundRectShapeCache.getMaxSize());
	log.appendFormat(" RectShapeCache %8d / %8d\n",
	rectShapeCache.getSize(), rectShapeCache.getMaxSize());
	log.appendFormat(" ArcShapeCache %8d / %8d\n",
	arcShapeCache.getSize(), arcShapeCache.getMaxSize());
	log.appendFormat(" TextDropShadowCache %8d / %8d\n", dropShadowCache.getSize(),
	dropShadowCache.getMaxSize());
	for (uint32_t i = 0; i < fontRenderer.getFontRendererCount(); i++) {
	const uint32_t size = fontRenderer.getFontRendererSize(i);
	log.appendFormat(" FontRenderer %d %8d / %8d\n", i, size, size);
	}
	log.appendFormat("Other:\n");
	log.appendFormat(" FboCache %8d / %8d\n",
	fboCache.getSize(), fboCache.getMaxSize());
	log.appendFormat(" PatchCache %8d / %8d\n",
	patchCache.getSize(), patchCache.getMaxSize());

	uint32_t total = 0;
	total += textureCache.getSize();
	total += layerCache.getSize();
	total += gradientCache.getSize();
	total += pathCache.getSize();
	total += dropShadowCache.getSize();
	total += roundRectShapeCache.getSize();
	total += circleShapeCache.getSize();
	total += ovalShapeCache.getSize();
	total += rectShapeCache.getSize();
	total += arcShapeCache.getSize();
	for (uint32_t i = 0; i < fontRenderer.getFontRendererCount(); i++) {
	total += fontRenderer.getFontRendererSize(i);
	}

	log.appendFormat("Total memory usage:\n");
	log.appendFormat(" %d bytes, %.2f MB\n", total, total / 1024.0f / 1024.0f);
	}

	///////////////////////////////////////////////////////////////////////////////
	// Memory management
	///////////////////////////////////////////////////////////////////////////////

	void Caches::clearGarbage() {
	textureCache.clearGarbage();
	pathCache.clearGarbage();

	Mutex::Autolock _l(mGarbageLock);

	size_t count = mLayerGarbage.size();
	for (size_t i = 0; i < count; i++) {
	Layer* layer = mLayerGarbage.itemAt(i);
	LayerRenderer::destroyLayer(layer);
	}
	mLayerGarbage.clear();

	count = mDisplayListGarbage.size();
	for (size_t i = 0; i < count; i++) {
	DisplayList* displayList = mDisplayListGarbage.itemAt(i);
	delete displayList;
	}
	mDisplayListGarbage.clear();
	}

	void Caches::deleteLayerDeferred(Layer* layer) {
	Mutex::Autolock _l(mGarbageLock);
	mLayerGarbage.push(layer);
	}

	void Caches::deleteDisplayListDeferred(DisplayList* displayList) {
	Mutex::Autolock _l(mGarbageLock);
	mDisplayListGarbage.push(displayList);
	}

	void Caches::flush(FlushMode mode) {
	FLUSH_LOGD("Flushing caches (mode %d)", mode);

	clearGarbage();

	switch (mode) {
	case kFlushMode_Full:
	textureCache.clear();
	patchCache.clear();
	dropShadowCache.clear();
	gradientCache.clear();
	fontRenderer.clear();
	// fall through
	case kFlushMode_Moderate:
	fontRenderer.flush();
	textureCache.flush();
	pathCache.clear();
	roundRectShapeCache.clear();
	circleShapeCache.clear();
	ovalShapeCache.clear();
	rectShapeCache.clear();
	arcShapeCache.clear();
	// fall through
	case kFlushMode_Layers:
	layerCache.clear();
	break;
	}
	}

	///////////////////////////////////////////////////////////////////////////////
	// VBO
	///////////////////////////////////////////////////////////////////////////////

	bool Caches::bindMeshBuffer() {
	return bindMeshBuffer(meshBuffer);
	}

	bool Caches::bindMeshBuffer(const GLuint buffer) {
	if (mCurrentBuffer != buffer) {
	glBindBuffer(GL_ARRAY_BUFFER, buffer);
	mCurrentBuffer = buffer;
	return true;
	}
	return false;
	}

	bool Caches::unbindMeshBuffer() {
	if (mCurrentBuffer) {
	glBindBuffer(GL_ARRAY_BUFFER, 0);
	mCurrentBuffer = 0;
	return true;
	}
	return false;
	}

	bool Caches::bindIndicesBuffer(const GLuint buffer) {
	if (mCurrentIndicesBuffer != buffer) {
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
	mCurrentIndicesBuffer = buffer;
	return true;
	}
	return false;
	}

	bool Caches::unbindIndicesBuffer() {
	if (mCurrentIndicesBuffer) {
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
	mCurrentIndicesBuffer = 0;
	return true;
	}
	return false;
	}

	void Caches::bindPositionVertexPointer(bool force, GLuint slot, GLvoid* vertices, GLsizei stride) {
	if (force \|\| vertices != mCurrentPositionPointer) {
	glVertexAttribPointer(slot, 2, GL_FLOAT, GL_FALSE, stride, vertices);
	mCurrentPositionPointer = vertices;
	}
	}

	void Caches::bindTexCoordsVertexPointer(bool force, GLuint slot, GLvoid* vertices) {
	if (force \|\| vertices != mCurrentTexCoordsPointer) {
	glVertexAttribPointer(slot, 2, GL_FLOAT, GL_FALSE, gMeshStride, vertices);
	mCurrentTexCoordsPointer = vertices;
	}
	}

	void Caches::resetVertexPointers() {
	mCurrentPositionPointer = this;
	mCurrentTexCoordsPointer = this;
	}

	void Caches::resetTexCoordsVertexPointer() {
	mCurrentTexCoordsPointer = this;
	}

	void Caches::enableTexCoordsVertexArray() {
	if (!mTexCoordsArrayEnabled) {
	glEnableVertexAttribArray(Program::kBindingTexCoords);
	mCurrentTexCoordsPointer = this;
	mTexCoordsArrayEnabled = true;
	}
	}

	void Caches::disbaleTexCoordsVertexArray() {
	if (mTexCoordsArrayEnabled) {
	glDisableVertexAttribArray(Program::kBindingTexCoords);
	mTexCoordsArrayEnabled = false;
	}
	}

	void Caches::activeTexture(GLuint textureUnit) {
	if (mTextureUnit != textureUnit) {
	glActiveTexture(gTextureUnits[textureUnit]);
	mTextureUnit = textureUnit;
	}
	}

	void Caches::setScissor(GLint x, GLint y, GLint width, GLint height) {
	if (x != mScissorX \|\| y != mScissorY \|\| width != mScissorWidth \|\| height != mScissorHeight) {
	glScissor(x, y, width, height);

	mScissorX = x;
	mScissorY = y;
	mScissorWidth = width;
	mScissorHeight = height;
	}
	}

	void Caches::resetScissor() {
	mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;
	}

	TextureVertex* Caches::getRegionMesh() {
	// Create the mesh, 2 triangles and 4 vertices per rectangle in the region
	if (!mRegionMesh) {
	mRegionMesh = new TextureVertex[REGION_MESH_QUAD_COUNT * 4];

	uint16_t* regionIndices = new uint16_t[REGION_MESH_QUAD_COUNT * 6];
	for (int i = 0; i < REGION_MESH_QUAD_COUNT; i++) {
	uint16_t quad = i * 4;
	int index = i * 6;
	regionIndices[index ] = quad; // top-left
	regionIndices[index + 1] = quad + 1; // top-right
	regionIndices[index + 2] = quad + 2; // bottom-left
	regionIndices[index + 3] = quad + 2; // bottom-left
	regionIndices[index + 4] = quad + 1; // top-right
	regionIndices[index + 5] = quad + 3; // bottom-right
	}

	glGenBuffers(1, &mRegionMeshIndices);
	bindIndicesBuffer(mRegionMeshIndices);
	glBufferData(GL_ELEMENT_ARRAY_BUFFER, REGION_MESH_QUAD_COUNT * 6 * sizeof(uint16_t),
	regionIndices, GL_STATIC_DRAW);

	delete[] regionIndices;
	} else {
	bindIndicesBuffer(mRegionMeshIndices);
	}

	return mRegionMesh;
	}

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