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

 /*
  * Copyright (C) 2014 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.
  */
 #include "renderstate/RenderState.h"

 #include "renderthread/CanvasContext.h"
 #include "renderthread/EglManager.h"
 #include "utils/GLUtils.h"

 namespace android {
 namespace uirenderer {

 RenderState::RenderState(renderthread::RenderThread& thread)
         : mRenderThread(thread)
         , mViewportWidth(0)
         , mViewportHeight(0)
         , mFramebuffer(0) {
     mThreadId = pthread_self();
 }

 RenderState::~RenderState() {
     LOG_ALWAYS_FATAL_IF(mBlend || mMeshState || mScissor || mStencil,
             "State object lifecycle not managed correctly");
 }

 void RenderState::onGLContextCreated() {
     LOG_ALWAYS_FATAL_IF(mBlend || mMeshState || mScissor || mStencil,
             "State object lifecycle not managed correctly");
     mBlend = new Blend();
     mMeshState = new MeshState();
     mScissor = new Scissor();
     mStencil = new Stencil();

     // This is delayed because the first access of Caches makes GL calls
     if (!mCaches) {
         mCaches = &Caches::createInstance(*this);
     }
     mCaches->init();
     mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
 }

 static void layerLostGlContext(Layer* layer) {
     layer->onGlContextLost();
 }

 void RenderState::onGLContextDestroyed() {
 /*
     size_t size = mActiveLayers.size();
     if (CC_UNLIKELY(size != 0)) {
         ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
                 mRegisteredContexts.size(), size, mActiveLayers.empty());
         mCaches->dumpMemoryUsage();
         for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
                 cit != mRegisteredContexts.end(); cit++) {
             renderthread::CanvasContext* context = *cit;
             ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
             ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
             for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
                     pit != context->mPrefetechedLayers.end(); pit++) {
                 (*pit)->debugDumpLayers("    ");
             }
             context->mRootRenderNode->debugDumpLayers("  ");
         }


         if (mActiveLayers.begin() == mActiveLayers.end()) {
             ALOGE("set has become empty. wat.");
         }
         for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
              lit != mActiveLayers.end(); lit++) {
             const Layer* layer = *(lit);
             ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
                     layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
         }
         LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
     }
 */

     // TODO: reset all cached state in state objects
     std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
     mAssetAtlas.terminate();

     mCaches->terminate();

     delete mBlend;
     mBlend = nullptr;
     delete mMeshState;
     mMeshState = nullptr;
     delete mScissor;
     mScissor = nullptr;
     delete mStencil;
     mStencil = nullptr;
 }

 void RenderState::setViewport(GLsizei width, GLsizei height) {
     mViewportWidth = width;
     mViewportHeight = height;
     glViewport(0, 0, mViewportWidth, mViewportHeight);
 }


 void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
     *outWidth = mViewportWidth;
     *outHeight = mViewportHeight;
 }

 void RenderState::bindFramebuffer(GLuint fbo) {
     if (mFramebuffer != fbo) {
         mFramebuffer = fbo;
         glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
     }
 }

 void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
     interruptForFunctorInvoke();
     (*functor)(mode, info);
     resumeFromFunctorInvoke();
 }

 void RenderState::interruptForFunctorInvoke() {
     mCaches->setProgram(nullptr);
     mCaches->textureState().resetActiveTexture();
     meshState().unbindMeshBuffer();
     meshState().unbindIndicesBuffer();
     meshState().resetVertexPointers();
     meshState().disableTexCoordsVertexArray();
     debugOverdraw(false, false);
 }

 void RenderState::resumeFromFunctorInvoke() {
     glViewport(0, 0, mViewportWidth, mViewportHeight);
     glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
     debugOverdraw(false, false);

     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

     scissor().invalidate();
     blend().invalidate();

     mCaches->textureState().activateTexture(0);
     mCaches->textureState().resetBoundTextures();
 }

 void RenderState::debugOverdraw(bool enable, bool clear) {
     if (Properties::debugOverdraw && mFramebuffer == 0) {
         if (clear) {
             scissor().setEnabled(false);
             stencil().clear();
         }
         if (enable) {
             stencil().enableDebugWrite();
         } else {
             stencil().disable();
         }
     }
 }

 void RenderState::requireGLContext() {
     assertOnGLThread();
     LOG_ALWAYS_FATAL_IF(!mRenderThread.eglManager().hasEglContext(),
             "No GL context!");
 }

 void RenderState::assertOnGLThread() {
     pthread_t curr = pthread_self();
     LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
 }

 class DecStrongTask : public renderthread::RenderTask {
 public:
     DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}

     virtual void run() override {
         mObject->decStrong(nullptr);
         mObject = nullptr;
         delete this;
     }

 private:
     VirtualLightRefBase* mObject;
 };

 void RenderState::postDecStrong(VirtualLightRefBase* object) {
     mRenderThread.queue(new DecStrongTask(object));
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Render
 ///////////////////////////////////////////////////////////////////////////////

 void RenderState::render(const Glop& glop) {
     const Glop::Mesh& mesh = glop.mesh;
     const Glop::Mesh::Vertices& vertices = mesh.vertices;
     const Glop::Mesh::Indices& indices = mesh.indices;
     const Glop::Fill& fill = glop.fill;

     // ---------------------------------------------
     // ---------- Program + uniform setup ----------
     // ---------------------------------------------
     mCaches->setProgram(fill.program);

     if (fill.colorEnabled) {
         fill.program->setColor(fill.color);
     }

     fill.program->set(glop.transform.ortho,
             glop.transform.modelView,
             glop.transform.meshTransform(),
             glop.transform.transformFlags & TransformFlags::OffsetByFudgeFactor);

     // Color filter uniforms
     if (fill.filterMode == ProgramDescription::kColorBlend) {
         const FloatColor& color = fill.filter.color;
         glUniform4f(mCaches->program().getUniform("colorBlend"),
                 color.r, color.g, color.b, color.a);
     } else if (fill.filterMode == ProgramDescription::kColorMatrix) {
         glUniformMatrix4fv(mCaches->program().getUniform("colorMatrix"), 1, GL_FALSE,
                 fill.filter.matrix.matrix);
         glUniform4fv(mCaches->program().getUniform("colorMatrixVector"), 1,
                 fill.filter.matrix.vector);
     }

     // Round rect clipping uniforms
     if (glop.roundRectClipState) {
         // TODO: avoid query, and cache values (or RRCS ptr) in program
         const RoundRectClipState* state = glop.roundRectClipState;
         const Rect& innerRect = state->innerRect;
         glUniform4f(fill.program->getUniform("roundRectInnerRectLTRB"),
                 innerRect.left, innerRect.top,
                 innerRect.right, innerRect.bottom);
         glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
                 1, GL_FALSE, &state->matrix.data[0]);

         // add half pixel to round out integer rect space to cover pixel centers
         float roundedOutRadius = state->radius + 0.5f;
         glUniform1f(fill.program->getUniform("roundRectRadius"),
                 roundedOutRadius);
     }

     // --------------------------------
     // ---------- Mesh setup ----------
     // --------------------------------
     // vertices
     const bool force = meshState().bindMeshBufferInternal(vertices.bufferObject)
             || (vertices.position != nullptr);
     meshState().bindPositionVertexPointer(force, vertices.position, vertices.stride);

     // indices
     meshState().bindIndicesBufferInternal(indices.bufferObject);

     if (vertices.attribFlags & VertexAttribFlags::TextureCoord) {
         const Glop::Fill::TextureData& texture = fill.texture;
         // texture always takes slot 0, shader samplers increment from there
         mCaches->textureState().activateTexture(0);

         if (texture.clamp != GL_INVALID_ENUM) {
             texture.texture->setWrap(texture.clamp, true, false, texture.target);
         }
         if (texture.filter != GL_INVALID_ENUM) {
             texture.texture->setFilter(texture.filter, true, false, texture.target);
         }

         mCaches->textureState().bindTexture(texture.target, texture.texture->id);
         meshState().enableTexCoordsVertexArray();
         meshState().bindTexCoordsVertexPointer(force, vertices.texCoord, vertices.stride);

         if (texture.textureTransform) {
             glUniformMatrix4fv(fill.program->getUniform("mainTextureTransform"), 1,
                     GL_FALSE, &texture.textureTransform->data[0]);
         }
     } else {
         meshState().disableTexCoordsVertexArray();
     }
     int colorLocation = -1;
     if (vertices.attribFlags & VertexAttribFlags::Color) {
         colorLocation = fill.program->getAttrib("colors");
         glEnableVertexAttribArray(colorLocation);
         glVertexAttribPointer(colorLocation, 4, GL_FLOAT, GL_FALSE, vertices.stride, vertices.color);
     }
     int alphaLocation = -1;
     if (vertices.attribFlags & VertexAttribFlags::Alpha) {
         // NOTE: alpha vertex position is computed assuming no VBO
         const void* alphaCoords = ((const GLbyte*) vertices.position) + kVertexAlphaOffset;
         alphaLocation = fill.program->getAttrib("vtxAlpha");
         glEnableVertexAttribArray(alphaLocation);
         glVertexAttribPointer(alphaLocation, 1, GL_FLOAT, GL_FALSE, vertices.stride, alphaCoords);
     }
     // Shader uniforms
     SkiaShader::apply(*mCaches, fill.skiaShaderData);

     // ------------------------------------
     // ---------- GL state setup ----------
     // ------------------------------------
     blend().setFactors(glop.blend.src, glop.blend.dst);

     // ------------------------------------
     // ---------- Actual drawing ----------
     // ------------------------------------
     if (indices.bufferObject == meshState().getQuadListIBO()) {
         // Since the indexed quad list is of limited length, we loop over
         // the glDrawXXX method while updating the vertex pointer
         GLsizei elementsCount = mesh.elementCount;
         const GLbyte* vertexData = static_cast<const GLbyte*>(vertices.position);
         while (elementsCount > 0) {
             GLsizei drawCount = MathUtils::min(elementsCount, (GLsizei) kMaxNumberOfQuads * 6);

             // rebind pointers without forcing, since initial bind handled above
             meshState().bindPositionVertexPointer(false, vertexData, vertices.stride);
             if (vertices.attribFlags & VertexAttribFlags::TextureCoord) {
                 meshState().bindTexCoordsVertexPointer(false,
                         vertexData + kMeshTextureOffset, vertices.stride);
             }

             glDrawElements(mesh.primitiveMode, drawCount, GL_UNSIGNED_SHORT, nullptr);
             elementsCount -= drawCount;
             vertexData += (drawCount / 6) * 4 * vertices.stride;
         }
     } else if (indices.bufferObject || indices.indices) {
         glDrawElements(mesh.primitiveMode, mesh.elementCount, GL_UNSIGNED_SHORT, indices.indices);
     } else {
         glDrawArrays(mesh.primitiveMode, 0, mesh.elementCount);
     }

     // -----------------------------------
     // ---------- Mesh teardown ----------
     // -----------------------------------
     if (vertices.attribFlags & VertexAttribFlags::Alpha) {
         glDisableVertexAttribArray(alphaLocation);
     }
     if (vertices.attribFlags & VertexAttribFlags::Color) {
         glDisableVertexAttribArray(colorLocation);
     }
 }

 void RenderState::dump() {
     blend().dump();
     meshState().dump();
     scissor().dump();
     stencil().dump();
 }

 } /* namespace uirenderer */
 } /* namespace android */
	/*
	* Copyright (C) 2014 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.
	*/
	#include "renderstate/RenderState.h"

	#include "renderthread/CanvasContext.h"
	#include "renderthread/EglManager.h"
	#include "utils/GLUtils.h"

	namespace android {
	namespace uirenderer {

	RenderState::RenderState(renderthread::RenderThread& thread)
	: mRenderThread(thread)
	, mViewportWidth(0)
	, mViewportHeight(0)
	, mFramebuffer(0) {
	mThreadId = pthread_self();
	}

	RenderState::~RenderState() {
	LOG_ALWAYS_FATAL_IF(mBlend \|\| mMeshState \|\| mScissor \|\| mStencil,
	"State object lifecycle not managed correctly");
	}

	void RenderState::onGLContextCreated() {
	LOG_ALWAYS_FATAL_IF(mBlend \|\| mMeshState \|\| mScissor \|\| mStencil,
	"State object lifecycle not managed correctly");
	mBlend = new Blend();
	mMeshState = new MeshState();
	mScissor = new Scissor();
	mStencil = new Stencil();

	// This is delayed because the first access of Caches makes GL calls
	if (!mCaches) {
	mCaches = &Caches::createInstance(*this);
	}
	mCaches->init();
	mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
	}

	static void layerLostGlContext(Layer* layer) {
	layer->onGlContextLost();
	}

	void RenderState::onGLContextDestroyed() {
	/*
	size_t size = mActiveLayers.size();
	if (CC_UNLIKELY(size != 0)) {
	ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
	mRegisteredContexts.size(), size, mActiveLayers.empty());
	mCaches->dumpMemoryUsage();
	for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
	cit != mRegisteredContexts.end(); cit++) {
	renderthread::CanvasContext* context = *cit;
	ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
	ALOGE(" Prefeteched layers: %zu", context->mPrefetechedLayers.size());
	for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
	pit != context->mPrefetechedLayers.end(); pit++) {
	(*pit)->debugDumpLayers(" ");
	}
	context->mRootRenderNode->debugDumpLayers(" ");
	}


	if (mActiveLayers.begin() == mActiveLayers.end()) {
	ALOGE("set has become empty. wat.");
	}
	for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
	lit != mActiveLayers.end(); lit++) {
	const Layer* layer = *(lit);
	ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
	layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
	}
	LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
	}
	*/

	// TODO: reset all cached state in state objects
	std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
	mAssetAtlas.terminate();

	mCaches->terminate();

	delete mBlend;
	mBlend = nullptr;
	delete mMeshState;
	mMeshState = nullptr;
	delete mScissor;
	mScissor = nullptr;
	delete mStencil;
	mStencil = nullptr;
	}

	void RenderState::setViewport(GLsizei width, GLsizei height) {
	mViewportWidth = width;
	mViewportHeight = height;
	glViewport(0, 0, mViewportWidth, mViewportHeight);
	}


	void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
	*outWidth = mViewportWidth;
	*outHeight = mViewportHeight;
	}

	void RenderState::bindFramebuffer(GLuint fbo) {
	if (mFramebuffer != fbo) {
	mFramebuffer = fbo;
	glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
	}
	}

	void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
	interruptForFunctorInvoke();
	(*functor)(mode, info);
	resumeFromFunctorInvoke();
	}

	void RenderState::interruptForFunctorInvoke() {
	mCaches->setProgram(nullptr);
	mCaches->textureState().resetActiveTexture();
	meshState().unbindMeshBuffer();
	meshState().unbindIndicesBuffer();
	meshState().resetVertexPointers();
	meshState().disableTexCoordsVertexArray();
	debugOverdraw(false, false);
	}

	void RenderState::resumeFromFunctorInvoke() {
	glViewport(0, 0, mViewportWidth, mViewportHeight);
	glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
	debugOverdraw(false, false);

	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

	scissor().invalidate();
	blend().invalidate();

	mCaches->textureState().activateTexture(0);
	mCaches->textureState().resetBoundTextures();
	}

	void RenderState::debugOverdraw(bool enable, bool clear) {
	if (Properties::debugOverdraw && mFramebuffer == 0) {
	if (clear) {
	scissor().setEnabled(false);
	stencil().clear();
	}
	if (enable) {
	stencil().enableDebugWrite();
	} else {
	stencil().disable();
	}
	}
	}

	void RenderState::requireGLContext() {
	assertOnGLThread();
	LOG_ALWAYS_FATAL_IF(!mRenderThread.eglManager().hasEglContext(),
	"No GL context!");
	}

	void RenderState::assertOnGLThread() {
	pthread_t curr = pthread_self();
	LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
	}

	class DecStrongTask : public renderthread::RenderTask {
	public:
	DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}

	virtual void run() override {
	mObject->decStrong(nullptr);
	mObject = nullptr;
	delete this;
	}

	private:
	VirtualLightRefBase* mObject;
	};

	void RenderState::postDecStrong(VirtualLightRefBase* object) {
	mRenderThread.queue(new DecStrongTask(object));
	}

	///////////////////////////////////////////////////////////////////////////////
	// Render
	///////////////////////////////////////////////////////////////////////////////

	void RenderState::render(const Glop& glop) {
	const Glop::Mesh& mesh = glop.mesh;
	const Glop::Mesh::Vertices& vertices = mesh.vertices;
	const Glop::Mesh::Indices& indices = mesh.indices;
	const Glop::Fill& fill = glop.fill;

	// ---------------------------------------------
	// ---------- Program + uniform setup ----------
	// ---------------------------------------------
	mCaches->setProgram(fill.program);

	if (fill.colorEnabled) {
	fill.program->setColor(fill.color);
	}

	fill.program->set(glop.transform.ortho,
	glop.transform.modelView,
	glop.transform.meshTransform(),
	glop.transform.transformFlags & TransformFlags::OffsetByFudgeFactor);

	// Color filter uniforms
	if (fill.filterMode == ProgramDescription::kColorBlend) {
	const FloatColor& color = fill.filter.color;
	glUniform4f(mCaches->program().getUniform("colorBlend"),
	color.r, color.g, color.b, color.a);
	} else if (fill.filterMode == ProgramDescription::kColorMatrix) {
	glUniformMatrix4fv(mCaches->program().getUniform("colorMatrix"), 1, GL_FALSE,
	fill.filter.matrix.matrix);
	glUniform4fv(mCaches->program().getUniform("colorMatrixVector"), 1,
	fill.filter.matrix.vector);
	}

	// Round rect clipping uniforms
	if (glop.roundRectClipState) {
	// TODO: avoid query, and cache values (or RRCS ptr) in program
	const RoundRectClipState* state = glop.roundRectClipState;
	const Rect& innerRect = state->innerRect;
	glUniform4f(fill.program->getUniform("roundRectInnerRectLTRB"),
	innerRect.left, innerRect.top,
	innerRect.right, innerRect.bottom);
	glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
	1, GL_FALSE, &state->matrix.data[0]);

	// add half pixel to round out integer rect space to cover pixel centers
	float roundedOutRadius = state->radius + 0.5f;
	glUniform1f(fill.program->getUniform("roundRectRadius"),
	roundedOutRadius);
	}

	// --------------------------------
	// ---------- Mesh setup ----------
	// --------------------------------
	// vertices
	const bool force = meshState().bindMeshBufferInternal(vertices.bufferObject)
	\|\| (vertices.position != nullptr);
	meshState().bindPositionVertexPointer(force, vertices.position, vertices.stride);

	// indices
	meshState().bindIndicesBufferInternal(indices.bufferObject);

	if (vertices.attribFlags & VertexAttribFlags::TextureCoord) {
	const Glop::Fill::TextureData& texture = fill.texture;
	// texture always takes slot 0, shader samplers increment from there
	mCaches->textureState().activateTexture(0);

	if (texture.clamp != GL_INVALID_ENUM) {
	texture.texture->setWrap(texture.clamp, true, false, texture.target);
	}
	if (texture.filter != GL_INVALID_ENUM) {
	texture.texture->setFilter(texture.filter, true, false, texture.target);
	}

	mCaches->textureState().bindTexture(texture.target, texture.texture->id);
	meshState().enableTexCoordsVertexArray();
	meshState().bindTexCoordsVertexPointer(force, vertices.texCoord, vertices.stride);

	if (texture.textureTransform) {
	glUniformMatrix4fv(fill.program->getUniform("mainTextureTransform"), 1,
	GL_FALSE, &texture.textureTransform->data[0]);
	}
	} else {
	meshState().disableTexCoordsVertexArray();
	}
	int colorLocation = -1;
	if (vertices.attribFlags & VertexAttribFlags::Color) {
	colorLocation = fill.program->getAttrib("colors");
	glEnableVertexAttribArray(colorLocation);
	glVertexAttribPointer(colorLocation, 4, GL_FLOAT, GL_FALSE, vertices.stride, vertices.color);
	}
	int alphaLocation = -1;
	if (vertices.attribFlags & VertexAttribFlags::Alpha) {
	// NOTE: alpha vertex position is computed assuming no VBO
	const void* alphaCoords = ((const GLbyte*) vertices.position) + kVertexAlphaOffset;
	alphaLocation = fill.program->getAttrib("vtxAlpha");
	glEnableVertexAttribArray(alphaLocation);
	glVertexAttribPointer(alphaLocation, 1, GL_FLOAT, GL_FALSE, vertices.stride, alphaCoords);
	}
	// Shader uniforms
	SkiaShader::apply(*mCaches, fill.skiaShaderData);

	// ------------------------------------
	// ---------- GL state setup ----------
	// ------------------------------------
	blend().setFactors(glop.blend.src, glop.blend.dst);

	// ------------------------------------
	// ---------- Actual drawing ----------
	// ------------------------------------
	if (indices.bufferObject == meshState().getQuadListIBO()) {
	// Since the indexed quad list is of limited length, we loop over
	// the glDrawXXX method while updating the vertex pointer
	GLsizei elementsCount = mesh.elementCount;
	const GLbyte* vertexData = static_cast<const GLbyte*>(vertices.position);
	while (elementsCount > 0) {
	GLsizei drawCount = MathUtils::min(elementsCount, (GLsizei) kMaxNumberOfQuads * 6);

	// rebind pointers without forcing, since initial bind handled above
	meshState().bindPositionVertexPointer(false, vertexData, vertices.stride);
	if (vertices.attribFlags & VertexAttribFlags::TextureCoord) {
	meshState().bindTexCoordsVertexPointer(false,
	vertexData + kMeshTextureOffset, vertices.stride);
	}

	glDrawElements(mesh.primitiveMode, drawCount, GL_UNSIGNED_SHORT, nullptr);
	elementsCount -= drawCount;
	vertexData += (drawCount / 6) * 4 * vertices.stride;
	}
	} else if (indices.bufferObject \|\| indices.indices) {
	glDrawElements(mesh.primitiveMode, mesh.elementCount, GL_UNSIGNED_SHORT, indices.indices);
	} else {
	glDrawArrays(mesh.primitiveMode, 0, mesh.elementCount);
	}

	// -----------------------------------
	// ---------- Mesh teardown ----------
	// -----------------------------------
	if (vertices.attribFlags & VertexAttribFlags::Alpha) {
	glDisableVertexAttribArray(alphaLocation);
	}
	if (vertices.attribFlags & VertexAttribFlags::Color) {
	glDisableVertexAttribArray(colorLocation);
	}
	}

	void RenderState::dump() {
	blend().dump();
	meshState().dump();
	scissor().dump();
	stencil().dump();
	}

	} /* namespace uirenderer */
	} /* namespace android */