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

 /*
  * Copyright (C) 2015 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 "BakedOpRenderer.h"

 #include "Caches.h"
 #include "Glop.h"
 #include "GlopBuilder.h"
 #include "renderstate/OffscreenBufferPool.h"
 #include "renderstate/RenderState.h"
 #include "utils/GLUtils.h"
 #include "VertexBuffer.h"

 #include <algorithm>

 namespace android {
 namespace uirenderer {

 OffscreenBuffer* BakedOpRenderer::startTemporaryLayer(uint32_t width, uint32_t height) {
     LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");

     OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState, width, height);
     startRepaintLayer(buffer, Rect(width, height));
     return buffer;
 }

 void BakedOpRenderer::recycleTemporaryLayer(OffscreenBuffer* offscreenBuffer) {
     mRenderState.layerPool().putOrDelete(offscreenBuffer);
 }

 void BakedOpRenderer::startRepaintLayer(OffscreenBuffer* offscreenBuffer, const Rect& repaintRect) {
     LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");

     // subtract repaintRect from region, since it will be regenerated
     if (repaintRect.contains(0, 0,
                 offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight)) {
         // repaint full layer, so throw away entire region
         offscreenBuffer->region.clear();
     } else {
         offscreenBuffer->region.subtractSelf(android::Rect(repaintRect.left, repaintRect.top,
                 repaintRect.right, repaintRect.bottom));
     }

     mRenderTarget.offscreenBuffer = offscreenBuffer;
     mRenderTarget.offscreenBuffer->hasRenderedSinceRepaint = false;

     // create and bind framebuffer
     mRenderTarget.frameBufferId = mRenderState.createFramebuffer();
     mRenderState.bindFramebuffer(mRenderTarget.frameBufferId);

     // attach the texture to the FBO
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
             offscreenBuffer->texture.id(), 0);
     GL_CHECKPOINT(LOW);

     int status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
     LOG_ALWAYS_FATAL_IF(status != GL_FRAMEBUFFER_COMPLETE,
             "framebuffer incomplete, status %d, textureId %d, size %dx%d",
             status,
             offscreenBuffer->texture.id(),
             offscreenBuffer->texture.width(),
             offscreenBuffer->texture.height());

     // Change the viewport & ortho projection
     setViewport(offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight);

     clearColorBuffer(repaintRect);
 }

 void BakedOpRenderer::endLayer() {
     if (mRenderTarget.stencil) {
         // if stencil was used for clipping, detach it and return it to pool
         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
         GL_CHECKPOINT(MODERATE);
         mCaches.renderBufferCache.put(mRenderTarget.stencil);
         mRenderTarget.stencil = nullptr;
     }
     mRenderTarget.lastStencilClip = nullptr;

     mRenderTarget.offscreenBuffer->updateMeshFromRegion();
     mRenderTarget.offscreenBuffer = nullptr; // It's in drawLayerOp's hands now.

     // Detach the texture from the FBO
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
     GL_CHECKPOINT(LOW);
     mRenderState.deleteFramebuffer(mRenderTarget.frameBufferId);
     mRenderTarget.frameBufferId = 0;
 }

 OffscreenBuffer* BakedOpRenderer::copyToLayer(const Rect& area) {
     const uint32_t width = area.getWidth();
     const uint32_t height = area.getHeight();
     OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState, width, height);
     if (!area.isEmpty() && width != 0 && height != 0) {
         mCaches.textureState().activateTexture(0);
         mCaches.textureState().bindTexture(buffer->texture.id());

         glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
                 area.left, mRenderTarget.viewportHeight - area.bottom, width, height);
     }
     return buffer;
 }

 void BakedOpRenderer::startFrame(uint32_t width, uint32_t height, const Rect& repaintRect) {
     LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "primary framebufferId must be 0");
     mRenderState.bindFramebuffer(0);
     setViewport(width, height);

     if (!mOpaque) {
         clearColorBuffer(repaintRect);
     }

     mRenderState.debugOverdraw(true, true);
 }

 void BakedOpRenderer::endFrame(const Rect& repaintRect) {
     if (CC_UNLIKELY(Properties::debugOverdraw)) {
         ClipRect overdrawClip(repaintRect);
         Rect viewportRect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight);
         // overdraw visualization
         for (int i = 1; i <= 4; i++) {
             if (i < 4) {
                 // nth level of overdraw tests for n+1 draws per pixel
                 mRenderState.stencil().enableDebugTest(i + 1, false);
             } else {
                 // 4th level tests for 4 or higher draws per pixel
                 mRenderState.stencil().enableDebugTest(4, true);
             }

             SkPaint paint;
             paint.setColor(mCaches.getOverdrawColor(i));
             Glop glop;
             GlopBuilder(mRenderState, mCaches, &glop)
                     .setRoundRectClipState(nullptr)
                     .setMeshUnitQuad()
                     .setFillPaint(paint, 1.0f)
                     .setTransform(Matrix4::identity(), TransformFlags::None)
                     .setModelViewMapUnitToRect(viewportRect)
                     .build();
             renderGlop(nullptr, &overdrawClip, glop);
         }
         mRenderState.stencil().disable();
     }

     // Note: we leave FBO 0 renderable here, for post-frame-content decoration
 }

 void BakedOpRenderer::setViewport(uint32_t width, uint32_t height) {
     mRenderTarget.viewportWidth = width;
     mRenderTarget.viewportHeight = height;
     mRenderTarget.orthoMatrix.loadOrtho(width, height);

     mRenderState.setViewport(width, height);
     mRenderState.blend().syncEnabled();
 }

 void BakedOpRenderer::clearColorBuffer(const Rect& rect) {
     if (rect.contains(Rect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight))) {
         // Full viewport is being cleared - disable scissor
         mRenderState.scissor().setEnabled(false);
     } else {
         // Requested rect is subset of viewport - scissor to it to avoid over-clearing
         mRenderState.scissor().setEnabled(true);
         mRenderState.scissor().set(rect.left, mRenderTarget.viewportHeight - rect.bottom,
                 rect.getWidth(), rect.getHeight());
     }
     glClear(GL_COLOR_BUFFER_BIT);
     if (!mRenderTarget.frameBufferId) mHasDrawn = true;
 }

 Texture* BakedOpRenderer::getTexture(const SkBitmap* bitmap) {
     Texture* texture = mRenderState.assetAtlas().getEntryTexture(bitmap->pixelRef());
     if (!texture) {
         return mCaches.textureCache.get(bitmap);
     }
     return texture;
 }

 void BakedOpRenderer::drawRects(const float* rects, int count, const SkPaint* paint) {
     std::vector<Vertex> vertices;
     vertices.reserve(count);
     Vertex* vertex = vertices.data();

     for (int index = 0; index < count; index += 4) {
         float l = rects[index + 0];
         float t = rects[index + 1];
         float r = rects[index + 2];
         float b = rects[index + 3];

         Vertex::set(vertex++, l, t);
         Vertex::set(vertex++, r, t);
         Vertex::set(vertex++, l, b);
         Vertex::set(vertex++, r, b);
     }

     LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "decoration only supported for FBO 0");
     // TODO: Currently assume full FBO damage, due to FrameInfoVisualizer::unionDirty.
     // Should should scissor/set mHasDrawn safely.
     mRenderState.scissor().setEnabled(false);
     mHasDrawn = true;
     Glop glop;
     GlopBuilder(mRenderState, mCaches, &glop)
             .setRoundRectClipState(nullptr)
             .setMeshIndexedQuads(vertices.data(), count / 4)
             .setFillPaint(*paint, 1.0f)
             .setTransform(Matrix4::identity(), TransformFlags::None)
             .setModelViewIdentityEmptyBounds()
             .build();
     mRenderState.render(glop, mRenderTarget.orthoMatrix);
 }

 // clears and re-fills stencil with provided rendertarget space quads,
 // and then put stencil into test mode
 void BakedOpRenderer::setupStencilQuads(std::vector<Vertex>& quadVertices,
         int incrementThreshold) {
     mRenderState.stencil().enableWrite(incrementThreshold);
     mRenderState.stencil().clear();
     Glop glop;
     GlopBuilder(mRenderState, mCaches, &glop)
             .setRoundRectClipState(nullptr)
             .setMeshIndexedQuads(quadVertices.data(), quadVertices.size() / 4)
             .setFillBlack()
             .setTransform(Matrix4::identity(), TransformFlags::None)
             .setModelViewIdentityEmptyBounds()
             .build();
     mRenderState.render(glop, mRenderTarget.orthoMatrix);
     mRenderState.stencil().enableTest(incrementThreshold);
 }

 void BakedOpRenderer::setupStencilRectList(const ClipBase* clip) {
     LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::RectangleList, "can't rectlist clip without rectlist");
     auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
     int quadCount = rectList.getTransformedRectanglesCount();
     std::vector<Vertex> rectangleVertices;
     rectangleVertices.reserve(quadCount * 4);
     for (int i = 0; i < quadCount; i++) {
         const TransformedRectangle& tr(rectList.getTransformedRectangle(i));
         const Matrix4& transform = tr.getTransform();
         Rect bounds = tr.getBounds();
         if (transform.rectToRect()) {
             // If rectToRect, can simply map bounds before storing verts
             transform.mapRect(bounds);
             bounds.doIntersect(clip->rect);
             if (bounds.isEmpty()) {
                 continue; // will be outside of scissor, skip
             }
         }

         rectangleVertices.push_back(Vertex{bounds.left, bounds.top});
         rectangleVertices.push_back(Vertex{bounds.right, bounds.top});
         rectangleVertices.push_back(Vertex{bounds.left, bounds.bottom});
         rectangleVertices.push_back(Vertex{bounds.right, bounds.bottom});

         if (!transform.rectToRect()) {
             // If not rectToRect, must map each point individually
             for (auto cur = rectangleVertices.end() - 4; cur < rectangleVertices.end(); cur++) {
                 transform.mapPoint(cur->x, cur->y);
             }
         }
     }
     setupStencilQuads(rectangleVertices, rectList.getTransformedRectanglesCount());
 }

 void BakedOpRenderer::setupStencilRegion(const ClipBase* clip) {
     LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::Region, "can't region clip without region");
     auto&& region = reinterpret_cast<const ClipRegion*>(clip)->region;

     std::vector<Vertex> regionVertices;
     SkRegion::Cliperator it(region, clip->rect.toSkIRect());
     while (!it.done()) {
         const SkIRect& r = it.rect();
         regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fTop});
         regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fTop});
         regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fBottom});
         regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fBottom});
         it.next();
     }
     setupStencilQuads(regionVertices, 0);
 }

 void BakedOpRenderer::prepareRender(const Rect* dirtyBounds, const ClipBase* clip) {
     // Prepare scissor (done before stencil, to simplify filling stencil)
     mRenderState.scissor().setEnabled(clip != nullptr);
     if (clip) {
         mRenderState.scissor().set(mRenderTarget.viewportHeight, clip->rect);
     }

     // If stencil may be used for clipping, enable it, fill it, or disable it as appropriate
     if (CC_LIKELY(!Properties::debugOverdraw)) {
         // only modify stencil mode and content when it's not used for overdraw visualization
         if (CC_UNLIKELY(clip && clip->mode != ClipMode::Rectangle)) {
             // NOTE: this pointer check is only safe for non-rect clips,
             // since rect clips may be created on the stack
             if (mRenderTarget.lastStencilClip != clip) {
                 // Stencil needed, but current stencil isn't up to date
                 mRenderTarget.lastStencilClip = clip;

                 if (mRenderTarget.frameBufferId != 0 && !mRenderTarget.stencil) {
                     OffscreenBuffer* layer = mRenderTarget.offscreenBuffer;
                     mRenderTarget.stencil = mCaches.renderBufferCache.get(
                             Stencil::getLayerStencilFormat(),
                             layer->texture.width(), layer->texture.height());
                     // stencil is bound + allocated - associate it with current FBO
                     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
                             GL_RENDERBUFFER, mRenderTarget.stencil->getName());
                 }

                 if (clip->mode == ClipMode::RectangleList) {
                     setupStencilRectList(clip);
                 } else {
                     setupStencilRegion(clip);
                 }
             } else {
                 // stencil is up to date - just need to ensure it's enabled (since an unclipped
                 // or scissor-only clipped op may have been drawn, disabling the stencil)
                 int incrementThreshold = 0;
                 if (CC_LIKELY(clip->mode == ClipMode::RectangleList)) {
                     auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
                     incrementThreshold = rectList.getTransformedRectanglesCount();
                 }
                 mRenderState.stencil().enableTest(incrementThreshold);
             }
         } else {
             // either scissor or no clip, so disable stencil test
             mRenderState.stencil().disable();
         }
     }

     if (dirtyBounds) {
         // dirty offscreenbuffer if present
         dirtyRenderTarget(*dirtyBounds);
     }
 }

 void BakedOpRenderer::renderGlopImpl(const Rect* dirtyBounds, const ClipBase* clip,
         const Glop& glop) {
     prepareRender(dirtyBounds, clip);
     mRenderState.render(glop, mRenderTarget.orthoMatrix);
     if (!mRenderTarget.frameBufferId) mHasDrawn = true;
 }

 void BakedOpRenderer::renderFunctor(const FunctorOp& op, const BakedOpState& state) {
     prepareRender(&state.computedState.clippedBounds, state.computedState.getClipIfNeeded());

     DrawGlInfo info;
     auto&& clip = state.computedState.clipRect();
     info.clipLeft = clip.left;
     info.clipTop = clip.top;
     info.clipRight = clip.right;
     info.clipBottom = clip.bottom;
     info.isLayer = offscreenRenderTarget();
     info.width = mRenderTarget.viewportWidth;
     info.height = mRenderTarget.viewportHeight;
     state.computedState.transform.copyTo(&info.transform[0]);

     mRenderState.invokeFunctor(op.functor, DrawGlInfo::kModeDraw, &info);
 }

 void BakedOpRenderer::dirtyRenderTarget(const Rect& uiDirty) {
     if (mRenderTarget.offscreenBuffer) {
         mRenderTarget.offscreenBuffer->dirty(uiDirty);
     }
 }

 } // namespace uirenderer
 } // namespace android
	/*
	* Copyright (C) 2015 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 "BakedOpRenderer.h"

	#include "Caches.h"
	#include "Glop.h"
	#include "GlopBuilder.h"
	#include "renderstate/OffscreenBufferPool.h"
	#include "renderstate/RenderState.h"
	#include "utils/GLUtils.h"
	#include "VertexBuffer.h"

	#include <algorithm>

	namespace android {
	namespace uirenderer {

	OffscreenBuffer* BakedOpRenderer::startTemporaryLayer(uint32_t width, uint32_t height) {
	LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");

	OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState, width, height);
	startRepaintLayer(buffer, Rect(width, height));
	return buffer;
	}

	void BakedOpRenderer::recycleTemporaryLayer(OffscreenBuffer* offscreenBuffer) {
	mRenderState.layerPool().putOrDelete(offscreenBuffer);
	}

	void BakedOpRenderer::startRepaintLayer(OffscreenBuffer* offscreenBuffer, const Rect& repaintRect) {
	LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");

	// subtract repaintRect from region, since it will be regenerated
	if (repaintRect.contains(0, 0,
	offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight)) {
	// repaint full layer, so throw away entire region
	offscreenBuffer->region.clear();
	} else {
	offscreenBuffer->region.subtractSelf(android::Rect(repaintRect.left, repaintRect.top,
	repaintRect.right, repaintRect.bottom));
	}

	mRenderTarget.offscreenBuffer = offscreenBuffer;
	mRenderTarget.offscreenBuffer->hasRenderedSinceRepaint = false;

	// create and bind framebuffer
	mRenderTarget.frameBufferId = mRenderState.createFramebuffer();
	mRenderState.bindFramebuffer(mRenderTarget.frameBufferId);

	// attach the texture to the FBO
	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
	offscreenBuffer->texture.id(), 0);
	GL_CHECKPOINT(LOW);

	int status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
	LOG_ALWAYS_FATAL_IF(status != GL_FRAMEBUFFER_COMPLETE,
	"framebuffer incomplete, status %d, textureId %d, size %dx%d",
	status,
	offscreenBuffer->texture.id(),
	offscreenBuffer->texture.width(),
	offscreenBuffer->texture.height());

	// Change the viewport & ortho projection
	setViewport(offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight);

	clearColorBuffer(repaintRect);
	}

	void BakedOpRenderer::endLayer() {
	if (mRenderTarget.stencil) {
	// if stencil was used for clipping, detach it and return it to pool
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
	GL_CHECKPOINT(MODERATE);
	mCaches.renderBufferCache.put(mRenderTarget.stencil);
	mRenderTarget.stencil = nullptr;
	}
	mRenderTarget.lastStencilClip = nullptr;

	mRenderTarget.offscreenBuffer->updateMeshFromRegion();
	mRenderTarget.offscreenBuffer = nullptr; // It's in drawLayerOp's hands now.

	// Detach the texture from the FBO
	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
	GL_CHECKPOINT(LOW);
	mRenderState.deleteFramebuffer(mRenderTarget.frameBufferId);
	mRenderTarget.frameBufferId = 0;
	}

	OffscreenBuffer* BakedOpRenderer::copyToLayer(const Rect& area) {
	const uint32_t width = area.getWidth();
	const uint32_t height = area.getHeight();
	OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState, width, height);
	if (!area.isEmpty() && width != 0 && height != 0) {
	mCaches.textureState().activateTexture(0);
	mCaches.textureState().bindTexture(buffer->texture.id());

	glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
	area.left, mRenderTarget.viewportHeight - area.bottom, width, height);
	}
	return buffer;
	}

	void BakedOpRenderer::startFrame(uint32_t width, uint32_t height, const Rect& repaintRect) {
	LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "primary framebufferId must be 0");
	mRenderState.bindFramebuffer(0);
	setViewport(width, height);

	if (!mOpaque) {
	clearColorBuffer(repaintRect);
	}

	mRenderState.debugOverdraw(true, true);
	}

	void BakedOpRenderer::endFrame(const Rect& repaintRect) {
	if (CC_UNLIKELY(Properties::debugOverdraw)) {
	ClipRect overdrawClip(repaintRect);
	Rect viewportRect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight);
	// overdraw visualization
	for (int i = 1; i <= 4; i++) {
	if (i < 4) {
	// nth level of overdraw tests for n+1 draws per pixel
	mRenderState.stencil().enableDebugTest(i + 1, false);
	} else {
	// 4th level tests for 4 or higher draws per pixel
	mRenderState.stencil().enableDebugTest(4, true);
	}

	SkPaint paint;
	paint.setColor(mCaches.getOverdrawColor(i));
	Glop glop;
	GlopBuilder(mRenderState, mCaches, &glop)
	.setRoundRectClipState(nullptr)
	.setMeshUnitQuad()
	.setFillPaint(paint, 1.0f)
	.setTransform(Matrix4::identity(), TransformFlags::None)
	.setModelViewMapUnitToRect(viewportRect)
	.build();
	renderGlop(nullptr, &overdrawClip, glop);
	}
	mRenderState.stencil().disable();
	}

	// Note: we leave FBO 0 renderable here, for post-frame-content decoration
	}

	void BakedOpRenderer::setViewport(uint32_t width, uint32_t height) {
	mRenderTarget.viewportWidth = width;
	mRenderTarget.viewportHeight = height;
	mRenderTarget.orthoMatrix.loadOrtho(width, height);

	mRenderState.setViewport(width, height);
	mRenderState.blend().syncEnabled();
	}

	void BakedOpRenderer::clearColorBuffer(const Rect& rect) {
	if (rect.contains(Rect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight))) {
	// Full viewport is being cleared - disable scissor
	mRenderState.scissor().setEnabled(false);
	} else {
	// Requested rect is subset of viewport - scissor to it to avoid over-clearing
	mRenderState.scissor().setEnabled(true);
	mRenderState.scissor().set(rect.left, mRenderTarget.viewportHeight - rect.bottom,
	rect.getWidth(), rect.getHeight());
	}
	glClear(GL_COLOR_BUFFER_BIT);
	if (!mRenderTarget.frameBufferId) mHasDrawn = true;
	}

	Texture* BakedOpRenderer::getTexture(const SkBitmap* bitmap) {
	Texture* texture = mRenderState.assetAtlas().getEntryTexture(bitmap->pixelRef());
	if (!texture) {
	return mCaches.textureCache.get(bitmap);
	}
	return texture;
	}

	void BakedOpRenderer::drawRects(const float* rects, int count, const SkPaint* paint) {
	std::vector<Vertex> vertices;
	vertices.reserve(count);
	Vertex* vertex = vertices.data();

	for (int index = 0; index < count; index += 4) {
	float l = rects[index + 0];
	float t = rects[index + 1];
	float r = rects[index + 2];
	float b = rects[index + 3];

	Vertex::set(vertex++, l, t);
	Vertex::set(vertex++, r, t);
	Vertex::set(vertex++, l, b);
	Vertex::set(vertex++, r, b);
	}

	LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "decoration only supported for FBO 0");
	// TODO: Currently assume full FBO damage, due to FrameInfoVisualizer::unionDirty.
	// Should should scissor/set mHasDrawn safely.
	mRenderState.scissor().setEnabled(false);
	mHasDrawn = true;
	Glop glop;
	GlopBuilder(mRenderState, mCaches, &glop)
	.setRoundRectClipState(nullptr)
	.setMeshIndexedQuads(vertices.data(), count / 4)
	.setFillPaint(*paint, 1.0f)
	.setTransform(Matrix4::identity(), TransformFlags::None)
	.setModelViewIdentityEmptyBounds()
	.build();
	mRenderState.render(glop, mRenderTarget.orthoMatrix);
	}

	// clears and re-fills stencil with provided rendertarget space quads,
	// and then put stencil into test mode
	void BakedOpRenderer::setupStencilQuads(std::vector<Vertex>& quadVertices,
	int incrementThreshold) {
	mRenderState.stencil().enableWrite(incrementThreshold);
	mRenderState.stencil().clear();
	Glop glop;
	GlopBuilder(mRenderState, mCaches, &glop)
	.setRoundRectClipState(nullptr)
	.setMeshIndexedQuads(quadVertices.data(), quadVertices.size() / 4)
	.setFillBlack()
	.setTransform(Matrix4::identity(), TransformFlags::None)
	.setModelViewIdentityEmptyBounds()
	.build();
	mRenderState.render(glop, mRenderTarget.orthoMatrix);
	mRenderState.stencil().enableTest(incrementThreshold);
	}

	void BakedOpRenderer::setupStencilRectList(const ClipBase* clip) {
	LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::RectangleList, "can't rectlist clip without rectlist");
	auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
	int quadCount = rectList.getTransformedRectanglesCount();
	std::vector<Vertex> rectangleVertices;
	rectangleVertices.reserve(quadCount * 4);
	for (int i = 0; i < quadCount; i++) {
	const TransformedRectangle& tr(rectList.getTransformedRectangle(i));
	const Matrix4& transform = tr.getTransform();
	Rect bounds = tr.getBounds();
	if (transform.rectToRect()) {
	// If rectToRect, can simply map bounds before storing verts
	transform.mapRect(bounds);
	bounds.doIntersect(clip->rect);
	if (bounds.isEmpty()) {
	continue; // will be outside of scissor, skip
	}
	}

	rectangleVertices.push_back(Vertex{bounds.left, bounds.top});
	rectangleVertices.push_back(Vertex{bounds.right, bounds.top});
	rectangleVertices.push_back(Vertex{bounds.left, bounds.bottom});
	rectangleVertices.push_back(Vertex{bounds.right, bounds.bottom});

	if (!transform.rectToRect()) {
	// If not rectToRect, must map each point individually
	for (auto cur = rectangleVertices.end() - 4; cur < rectangleVertices.end(); cur++) {
	transform.mapPoint(cur->x, cur->y);
	}
	}
	}
	setupStencilQuads(rectangleVertices, rectList.getTransformedRectanglesCount());
	}

	void BakedOpRenderer::setupStencilRegion(const ClipBase* clip) {
	LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::Region, "can't region clip without region");
	auto&& region = reinterpret_cast<const ClipRegion*>(clip)->region;

	std::vector<Vertex> regionVertices;
	SkRegion::Cliperator it(region, clip->rect.toSkIRect());
	while (!it.done()) {
	const SkIRect& r = it.rect();
	regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fTop});
	regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fTop});
	regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fBottom});
	regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fBottom});
	it.next();
	}
	setupStencilQuads(regionVertices, 0);
	}

	void BakedOpRenderer::prepareRender(const Rect* dirtyBounds, const ClipBase* clip) {
	// Prepare scissor (done before stencil, to simplify filling stencil)
	mRenderState.scissor().setEnabled(clip != nullptr);
	if (clip) {
	mRenderState.scissor().set(mRenderTarget.viewportHeight, clip->rect);
	}

	// If stencil may be used for clipping, enable it, fill it, or disable it as appropriate
	if (CC_LIKELY(!Properties::debugOverdraw)) {
	// only modify stencil mode and content when it's not used for overdraw visualization
	if (CC_UNLIKELY(clip && clip->mode != ClipMode::Rectangle)) {
	// NOTE: this pointer check is only safe for non-rect clips,
	// since rect clips may be created on the stack
	if (mRenderTarget.lastStencilClip != clip) {
	// Stencil needed, but current stencil isn't up to date
	mRenderTarget.lastStencilClip = clip;

	if (mRenderTarget.frameBufferId != 0 && !mRenderTarget.stencil) {
	OffscreenBuffer* layer = mRenderTarget.offscreenBuffer;
	mRenderTarget.stencil = mCaches.renderBufferCache.get(
	Stencil::getLayerStencilFormat(),
	layer->texture.width(), layer->texture.height());
	// stencil is bound + allocated - associate it with current FBO
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
	GL_RENDERBUFFER, mRenderTarget.stencil->getName());
	}

	if (clip->mode == ClipMode::RectangleList) {
	setupStencilRectList(clip);
	} else {
	setupStencilRegion(clip);
	}
	} else {
	// stencil is up to date - just need to ensure it's enabled (since an unclipped
	// or scissor-only clipped op may have been drawn, disabling the stencil)
	int incrementThreshold = 0;
	if (CC_LIKELY(clip->mode == ClipMode::RectangleList)) {
	auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
	incrementThreshold = rectList.getTransformedRectanglesCount();
	}
	mRenderState.stencil().enableTest(incrementThreshold);
	}
	} else {
	// either scissor or no clip, so disable stencil test
	mRenderState.stencil().disable();
	}
	}

	if (dirtyBounds) {
	// dirty offscreenbuffer if present
	dirtyRenderTarget(*dirtyBounds);
	}
	}

	void BakedOpRenderer::renderGlopImpl(const Rect* dirtyBounds, const ClipBase* clip,
	const Glop& glop) {
	prepareRender(dirtyBounds, clip);
	mRenderState.render(glop, mRenderTarget.orthoMatrix);
	if (!mRenderTarget.frameBufferId) mHasDrawn = true;
	}

	void BakedOpRenderer::renderFunctor(const FunctorOp& op, const BakedOpState& state) {
	prepareRender(&state.computedState.clippedBounds, state.computedState.getClipIfNeeded());

	DrawGlInfo info;
	auto&& clip = state.computedState.clipRect();
	info.clipLeft = clip.left;
	info.clipTop = clip.top;
	info.clipRight = clip.right;
	info.clipBottom = clip.bottom;
	info.isLayer = offscreenRenderTarget();
	info.width = mRenderTarget.viewportWidth;
	info.height = mRenderTarget.viewportHeight;
	state.computedState.transform.copyTo(&info.transform[0]);

	mRenderState.invokeFunctor(op.functor, DrawGlInfo::kModeDraw, &info);
	}

	void BakedOpRenderer::dirtyRenderTarget(const Rect& uiDirty) {
	if (mRenderTarget.offscreenBuffer) {
	mRenderTarget.offscreenBuffer->dirty(uiDirty);
	}
	}

	} // namespace uirenderer
	} // namespace android