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

 /*
  * 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 "GlopBuilder.h"

 #include "Caches.h"
 #include "Glop.h"
 #include "Matrix.h"
 #include "renderstate/MeshState.h"
 #include "renderstate/RenderState.h"
 #include "SkiaShader.h"
 #include "Texture.h"
 #include "utils/PaintUtils.h"
 #include "VertexBuffer.h"

 #include <GLES2/gl2.h>
 #include <SkPaint.h>

 namespace android {
 namespace uirenderer {

 #define TRIGGER_STAGE(stageFlag) \
     LOG_ALWAYS_FATAL_IF(stageFlag & mStageFlags, "Stage %d cannot be run twice"); \
     mStageFlags = static_cast<StageFlags>(mStageFlags | stageFlag)

 GlopBuilder::GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop)
         : mRenderState(renderState)
         , mCaches(caches)
         , mOutGlop(outGlop){
     mStageFlags = kInitialStage;
 }

 GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer, bool shadowInterp) {
     TRIGGER_STAGE(kMeshStage);

     const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();

     bool alphaVertex = flags & VertexBuffer::kAlpha;
     bool indices = flags & VertexBuffer::kIndices;
     mOutGlop->mesh.vertexFlags = alphaVertex ? kAlpha_Attrib : kNone_Attrib;
     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
     mOutGlop->mesh.vertexBufferObject = 0;
     mOutGlop->mesh.vertices = vertexBuffer.getBuffer();
     mOutGlop->mesh.indexBufferObject = 0;
     mOutGlop->mesh.indices = vertexBuffer.getIndices();
     mOutGlop->mesh.vertexCount = indices
             ? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
     mOutGlop->mesh.stride = alphaVertex ? kAlphaVertexStride : kVertexStride;

     mDescription.hasVertexAlpha = alphaVertex;
     mDescription.useShadowAlphaInterp = shadowInterp;
     return *this;
 }

 GlopBuilder& GlopBuilder::setMeshUnitQuad() {
     TRIGGER_STAGE(kMeshStage);

     mOutGlop->mesh.vertexFlags = kNone_Attrib;
     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
     mOutGlop->mesh.vertexBufferObject = mRenderState.meshState().getUnitQuadVBO();
     mOutGlop->mesh.vertices = nullptr;
     mOutGlop->mesh.indexBufferObject = 0;
     mOutGlop->mesh.indices = nullptr;
     mOutGlop->mesh.vertexCount = 4;
     mOutGlop->mesh.stride = kTextureVertexStride;
     return *this;
 }

 GlopBuilder& GlopBuilder::setTransform(const Matrix4& ortho,
         const Matrix4& transform, bool fudgingOffset) {
     TRIGGER_STAGE(kTransformStage);

     mOutGlop->transform.ortho.load(ortho);
     mOutGlop->transform.canvas.load(transform);
     mOutGlop->transform.fudgingOffset = fudgingOffset;
     return *this;
 }

 GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
     TRIGGER_STAGE(kModelViewStage);
     mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
     mOutGlop->bounds = destination;
     return *this;
 }

 GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
     TRIGGER_STAGE(kModelViewStage);
     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
     mOutGlop->bounds = source;
     mOutGlop->bounds.translate(offsetX, offsetY);
     return *this;
 }

 GlopBuilder& GlopBuilder::setPaint(const SkPaint* paint, float alphaScale) {
     TRIGGER_STAGE(kFillStage);

     // TODO: support null paint
     const SkShader* shader = paint->getShader();
     const SkColorFilter* colorFilter = paint->getColorFilter();

     SkXfermode::Mode mode = PaintUtils::getXfermode(paint->getXfermode());
     if (mode != SkXfermode::kClear_Mode) {
         int color = paint->getColor();
         float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
         if (!shader) {
             float colorScale = alpha / 255.0f;
             mOutGlop->fill.color = {
                     alpha,
                     colorScale * SkColorGetR(color),
                     colorScale * SkColorGetG(color),
                     colorScale * SkColorGetB(color)
             };
         } else {
             mOutGlop->fill.color = { alpha, 1, 1, 1 };
         }
     } else {
         mOutGlop->fill.color = { 1, 0, 0, 0 };
     }
     const bool SWAP_SRC_DST = false;

     mOutGlop->blend = { GL_ZERO, GL_ZERO };
     if (mOutGlop->fill.color.a < 1.0f
             || PaintUtils::isBlendedShader(shader)
             || PaintUtils::isBlendedColorFilter(colorFilter)
             || mode != SkXfermode::kSrcOver_Mode) {
         if (CC_LIKELY(mode <= SkXfermode::kScreen_Mode)) {
             Blend::getFactors(mode, SWAP_SRC_DST,
                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
         } else {
             // These blend modes are not supported by OpenGL directly and have
             // to be implemented using shaders. Since the shader will perform
             // the blending, don't enable GL blending off here
             // If the blend mode cannot be implemented using shaders, fall
             // back to the default SrcOver blend mode instead
             if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
                 mDescription.framebufferMode = mode;
                 mDescription.swapSrcDst = SWAP_SRC_DST;
                 // blending in shader, don't enable
             } else {
                 // unsupported
                 Blend::getFactors(SkXfermode::kSrcOver_Mode, SWAP_SRC_DST,
                         &mOutGlop->blend.src, &mOutGlop->blend.dst);
             }
         }
     }

     if (shader) {
         SkiaShader::describe(&mCaches, mDescription, mCaches.extensions(), *shader);
         // TODO: store shader data
         LOG_ALWAYS_FATAL("shaders not yet supported");
     }

     if (colorFilter) {
         SkColor color;
         SkXfermode::Mode mode;
         SkScalar srcColorMatrix[20];
         if (colorFilter->asColorMode(&color, &mode)) {
             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorBlend;
             mDescription.colorMode = mode;

             const float alpha = SkColorGetA(color) / 255.0f;
             float colorScale = alpha / 255.0f;
             mOutGlop->fill.filter.color = {
                     alpha,
                     colorScale * SkColorGetR(color),
                     colorScale * SkColorGetG(color),
                     colorScale * SkColorGetB(color),
             };
         } else if (colorFilter->asColorMatrix(srcColorMatrix)) {
             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorMatrix;

             float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
             memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
             memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
             memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
             memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));

             // Skia uses the range [0..255] for the addition vector, but we need
             // the [0..1] range to apply the vector in GLSL
             float* colorVector = mOutGlop->fill.filter.matrix.vector;
             colorVector[0] = srcColorMatrix[4] / 255.0f;
             colorVector[1] = srcColorMatrix[9] / 255.0f;
             colorVector[2] = srcColorMatrix[14] / 255.0f;
             colorVector[3] = srcColorMatrix[19] / 255.0f;
         }
     } else {
         mOutGlop->fill.filterMode = ProgramDescription::kColorNone;
     }

     return *this;
 }

 void GlopBuilder::build() {
     LOG_ALWAYS_FATAL_IF(mStageFlags != kAllStages, "glop not fully prepared!");

     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
     mOutGlop->fill.program = mCaches.programCache.get(mDescription);
     mOutGlop->transform.canvas.mapRect(mOutGlop->bounds);
 }

 } /* 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 "GlopBuilder.h"

	#include "Caches.h"
	#include "Glop.h"
	#include "Matrix.h"
	#include "renderstate/MeshState.h"
	#include "renderstate/RenderState.h"
	#include "SkiaShader.h"
	#include "Texture.h"
	#include "utils/PaintUtils.h"
	#include "VertexBuffer.h"

	#include <GLES2/gl2.h>
	#include <SkPaint.h>

	namespace android {
	namespace uirenderer {

	#define TRIGGER_STAGE(stageFlag) \
	LOG_ALWAYS_FATAL_IF(stageFlag & mStageFlags, "Stage %d cannot be run twice"); \
	mStageFlags = static_cast<StageFlags>(mStageFlags \| stageFlag)

	GlopBuilder::GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop)
	: mRenderState(renderState)
	, mCaches(caches)
	, mOutGlop(outGlop){
	mStageFlags = kInitialStage;
	}

	GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer, bool shadowInterp) {
	TRIGGER_STAGE(kMeshStage);

	const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();

	bool alphaVertex = flags & VertexBuffer::kAlpha;
	bool indices = flags & VertexBuffer::kIndices;
	mOutGlop->mesh.vertexFlags = alphaVertex ? kAlpha_Attrib : kNone_Attrib;
	mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
	mOutGlop->mesh.vertexBufferObject = 0;
	mOutGlop->mesh.vertices = vertexBuffer.getBuffer();
	mOutGlop->mesh.indexBufferObject = 0;
	mOutGlop->mesh.indices = vertexBuffer.getIndices();
	mOutGlop->mesh.vertexCount = indices
	? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
	mOutGlop->mesh.stride = alphaVertex ? kAlphaVertexStride : kVertexStride;

	mDescription.hasVertexAlpha = alphaVertex;
	mDescription.useShadowAlphaInterp = shadowInterp;
	return *this;
	}

	GlopBuilder& GlopBuilder::setMeshUnitQuad() {
	TRIGGER_STAGE(kMeshStage);

	mOutGlop->mesh.vertexFlags = kNone_Attrib;
	mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
	mOutGlop->mesh.vertexBufferObject = mRenderState.meshState().getUnitQuadVBO();
	mOutGlop->mesh.vertices = nullptr;
	mOutGlop->mesh.indexBufferObject = 0;
	mOutGlop->mesh.indices = nullptr;
	mOutGlop->mesh.vertexCount = 4;
	mOutGlop->mesh.stride = kTextureVertexStride;
	return *this;
	}

	GlopBuilder& GlopBuilder::setTransform(const Matrix4& ortho,
	const Matrix4& transform, bool fudgingOffset) {
	TRIGGER_STAGE(kTransformStage);

	mOutGlop->transform.ortho.load(ortho);
	mOutGlop->transform.canvas.load(transform);
	mOutGlop->transform.fudgingOffset = fudgingOffset;
	return *this;
	}

	GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
	TRIGGER_STAGE(kModelViewStage);
	mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
	mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
	mOutGlop->bounds = destination;
	return *this;
	}

	GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
	TRIGGER_STAGE(kModelViewStage);
	mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
	mOutGlop->bounds = source;
	mOutGlop->bounds.translate(offsetX, offsetY);
	return *this;
	}

	GlopBuilder& GlopBuilder::setPaint(const SkPaint* paint, float alphaScale) {
	TRIGGER_STAGE(kFillStage);

	// TODO: support null paint
	const SkShader* shader = paint->getShader();
	const SkColorFilter* colorFilter = paint->getColorFilter();

	SkXfermode::Mode mode = PaintUtils::getXfermode(paint->getXfermode());
	if (mode != SkXfermode::kClear_Mode) {
	int color = paint->getColor();
	float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
	if (!shader) {
	float colorScale = alpha / 255.0f;
	mOutGlop->fill.color = {
	alpha,
	colorScale * SkColorGetR(color),
	colorScale * SkColorGetG(color),
	colorScale * SkColorGetB(color)
	};
	} else {
	mOutGlop->fill.color = { alpha, 1, 1, 1 };
	}
	} else {
	mOutGlop->fill.color = { 1, 0, 0, 0 };
	}
	const bool SWAP_SRC_DST = false;

	mOutGlop->blend = { GL_ZERO, GL_ZERO };
	if (mOutGlop->fill.color.a < 1.0f
	\|\| PaintUtils::isBlendedShader(shader)
	\|\| PaintUtils::isBlendedColorFilter(colorFilter)
	\|\| mode != SkXfermode::kSrcOver_Mode) {
	if (CC_LIKELY(mode <= SkXfermode::kScreen_Mode)) {
	Blend::getFactors(mode, SWAP_SRC_DST,
	&mOutGlop->blend.src, &mOutGlop->blend.dst);
	} else {
	// These blend modes are not supported by OpenGL directly and have
	// to be implemented using shaders. Since the shader will perform
	// the blending, don't enable GL blending off here
	// If the blend mode cannot be implemented using shaders, fall
	// back to the default SrcOver blend mode instead
	if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
	mDescription.framebufferMode = mode;
	mDescription.swapSrcDst = SWAP_SRC_DST;
	// blending in shader, don't enable
	} else {
	// unsupported
	Blend::getFactors(SkXfermode::kSrcOver_Mode, SWAP_SRC_DST,
	&mOutGlop->blend.src, &mOutGlop->blend.dst);
	}
	}
	}

	if (shader) {
	SkiaShader::describe(&mCaches, mDescription, mCaches.extensions(), *shader);
	// TODO: store shader data
	LOG_ALWAYS_FATAL("shaders not yet supported");
	}

	if (colorFilter) {
	SkColor color;
	SkXfermode::Mode mode;
	SkScalar srcColorMatrix[20];
	if (colorFilter->asColorMode(&color, &mode)) {
	mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorBlend;
	mDescription.colorMode = mode;

	const float alpha = SkColorGetA(color) / 255.0f;
	float colorScale = alpha / 255.0f;
	mOutGlop->fill.filter.color = {
	alpha,
	colorScale * SkColorGetR(color),
	colorScale * SkColorGetG(color),
	colorScale * SkColorGetB(color),
	};
	} else if (colorFilter->asColorMatrix(srcColorMatrix)) {
	mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorMatrix;

	float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
	memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
	memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
	memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
	memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));

	// Skia uses the range [0..255] for the addition vector, but we need
	// the [0..1] range to apply the vector in GLSL
	float* colorVector = mOutGlop->fill.filter.matrix.vector;
	colorVector[0] = srcColorMatrix[4] / 255.0f;
	colorVector[1] = srcColorMatrix[9] / 255.0f;
	colorVector[2] = srcColorMatrix[14] / 255.0f;
	colorVector[3] = srcColorMatrix[19] / 255.0f;
	}
	} else {
	mOutGlop->fill.filterMode = ProgramDescription::kColorNone;
	}

	return *this;
	}

	void GlopBuilder::build() {
	LOG_ALWAYS_FATAL_IF(mStageFlags != kAllStages, "glop not fully prepared!");

	mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
	mOutGlop->fill.program = mCaches.programCache.get(mDescription);
	mOutGlop->transform.canvas.mapRect(mOutGlop->bounds);
	}

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