d41c4d8c73
Adds remaining missing overrides and nullptr usages, missed due to an extreme failure in tool usage. Change-Id: I56abd72975a3999ad13330003c348db40f59aebf
475 lines
18 KiB
C++
475 lines
18 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "OpenGLRenderer"
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#include <utils/Log.h>
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#include <SkMatrix.h>
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#include "Caches.h"
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#include "Extensions.h"
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#include "Layer.h"
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#include "Matrix.h"
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#include "SkiaShader.h"
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#include "Texture.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Support
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///////////////////////////////////////////////////////////////////////////////
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static const GLint gTileModes[] = {
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GL_CLAMP_TO_EDGE, // == SkShader::kClamp_TileMode
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GL_REPEAT, // == SkShader::kRepeat_Mode
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GL_MIRRORED_REPEAT // == SkShader::kMirror_TileMode
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};
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/**
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* This function does not work for n == 0.
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*/
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static inline bool isPowerOfTwo(unsigned int n) {
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return !(n & (n - 1));
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}
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static inline void bindUniformColor(int slot, uint32_t color) {
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const float a = ((color >> 24) & 0xff) / 255.0f;
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glUniform4f(slot,
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a * ((color >> 16) & 0xff) / 255.0f,
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a * ((color >> 8) & 0xff) / 255.0f,
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a * ((color ) & 0xff) / 255.0f,
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a);
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}
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static inline void bindTexture(Caches* caches, Texture* texture, GLenum wrapS, GLenum wrapT) {
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caches->bindTexture(texture->id);
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texture->setWrapST(wrapS, wrapT);
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}
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/**
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* Compute the matrix to transform to screen space.
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* @param screenSpace Output param for the computed matrix.
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* @param unitMatrix The unit matrix for gradient shaders, as returned by SkShader::asAGradient,
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* or identity.
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* @param localMatrix Local matrix, as returned by SkShader::getLocalMatrix().
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* @param modelViewMatrix Model view matrix, as supplied by the OpenGLRenderer.
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*/
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static void computeScreenSpaceMatrix(mat4& screenSpace, const SkMatrix& unitMatrix,
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const SkMatrix& localMatrix, const mat4& modelViewMatrix) {
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mat4 shaderMatrix;
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// uses implicit construction
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shaderMatrix.loadInverse(localMatrix);
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// again, uses implicit construction
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screenSpace.loadMultiply(unitMatrix, shaderMatrix);
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screenSpace.multiply(modelViewMatrix);
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}
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// Returns true if one is a bitmap and the other is a gradient
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static bool bitmapAndGradient(SkiaShaderType type1, SkiaShaderType type2) {
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return (type1 == kBitmap_SkiaShaderType && type2 == kGradient_SkiaShaderType)
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|| (type2 == kBitmap_SkiaShaderType && type1 == kGradient_SkiaShaderType);
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}
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SkiaShaderType SkiaShader::getType(const SkShader& shader) {
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// First check for a gradient shader.
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switch (shader.asAGradient(nullptr)) {
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case SkShader::kNone_GradientType:
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// Not a gradient shader. Fall through to check for other types.
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break;
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case SkShader::kLinear_GradientType:
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case SkShader::kRadial_GradientType:
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case SkShader::kSweep_GradientType:
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return kGradient_SkiaShaderType;
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default:
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// This is a Skia gradient that has no SkiaShader equivalent. Return None to skip.
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return kNone_SkiaShaderType;
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}
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// The shader is not a gradient. Check for a bitmap shader.
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if (shader.asABitmap(nullptr, nullptr, nullptr) == SkShader::kDefault_BitmapType) {
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return kBitmap_SkiaShaderType;
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}
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// Check for a ComposeShader.
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SkShader::ComposeRec rec;
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if (shader.asACompose(&rec)) {
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const SkiaShaderType shaderAType = getType(*rec.fShaderA);
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const SkiaShaderType shaderBType = getType(*rec.fShaderB);
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// Compose is only supported if one is a bitmap and the other is a
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// gradient. Otherwise, return None to skip.
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if (!bitmapAndGradient(shaderAType, shaderBType)) {
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return kNone_SkiaShaderType;
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}
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return kCompose_SkiaShaderType;
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}
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if (shader.asACustomShader(nullptr)) {
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return kLayer_SkiaShaderType;
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}
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return kNone_SkiaShaderType;
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}
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typedef void (*describeProc)(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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describeProc gDescribeProc[] = {
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InvalidSkiaShader::describe,
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SkiaBitmapShader::describe,
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SkiaGradientShader::describe,
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SkiaComposeShader::describe,
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SkiaLayerShader::describe,
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};
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typedef void (*setupProgramProc)(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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setupProgramProc gSetupProgramProc[] = {
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InvalidSkiaShader::setupProgram,
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SkiaBitmapShader::setupProgram,
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SkiaGradientShader::setupProgram,
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SkiaComposeShader::setupProgram,
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SkiaLayerShader::setupProgram,
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};
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void SkiaShader::describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader) {
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gDescribeProc[getType(shader)](caches, description, extensions, shader);
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}
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void SkiaShader::setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader) {
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gSetupProgramProc[getType(shader)](caches, modelViewMatrix, textureUnit, extensions, shader);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Layer shader
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///////////////////////////////////////////////////////////////////////////////
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void SkiaLayerShader::describe(Caches*, ProgramDescription& description,
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const Extensions&, const SkShader& shader) {
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description.hasBitmap = true;
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}
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void SkiaLayerShader::setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions&, const SkShader& shader) {
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Layer* layer;
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if (!shader.asACustomShader(reinterpret_cast<void**>(&layer))) {
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LOG_ALWAYS_FATAL("SkiaLayerShader::setupProgram called on the wrong type of shader!");
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}
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GLuint textureSlot = (*textureUnit)++;
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caches->activeTexture(textureSlot);
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const float width = layer->getWidth();
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const float height = layer->getHeight();
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mat4 textureTransform;
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computeScreenSpaceMatrix(textureTransform, SkMatrix::I(), shader.getLocalMatrix(),
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modelViewMatrix);
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// Uniforms
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layer->bindTexture();
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layer->setWrap(GL_CLAMP_TO_EDGE);
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layer->setFilter(GL_LINEAR);
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Program* program = caches->currentProgram;
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glUniform1i(program->getUniform("bitmapSampler"), textureSlot);
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glUniformMatrix4fv(program->getUniform("textureTransform"), 1,
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GL_FALSE, &textureTransform.data[0]);
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glUniform2f(program->getUniform("textureDimension"), 1.0f / width, 1.0f / height);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Bitmap shader
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///////////////////////////////////////////////////////////////////////////////
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struct BitmapShaderInfo {
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float width;
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float height;
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GLenum wrapS;
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GLenum wrapT;
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Texture* texture;
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};
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static bool bitmapShaderHelper(Caches* caches, ProgramDescription* description,
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BitmapShaderInfo* shaderInfo,
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const Extensions& extensions,
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const SkBitmap& bitmap, SkShader::TileMode tileModes[2]) {
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Texture* texture = caches->textureCache.get(&bitmap);
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if (!texture) return false;
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const float width = texture->width;
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const float height = texture->height;
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GLenum wrapS, wrapT;
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if (description) {
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description->hasBitmap = true;
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}
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// The driver does not support non-power of two mirrored/repeated
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// textures, so do it ourselves
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if (!extensions.hasNPot() && (!isPowerOfTwo(width) || !isPowerOfTwo(height)) &&
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(tileModes[0] != SkShader::kClamp_TileMode ||
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tileModes[1] != SkShader::kClamp_TileMode)) {
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if (description) {
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description->isBitmapNpot = true;
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description->bitmapWrapS = gTileModes[tileModes[0]];
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description->bitmapWrapT = gTileModes[tileModes[1]];
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}
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wrapS = GL_CLAMP_TO_EDGE;
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wrapT = GL_CLAMP_TO_EDGE;
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} else {
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wrapS = gTileModes[tileModes[0]];
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wrapT = gTileModes[tileModes[1]];
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}
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if (shaderInfo) {
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shaderInfo->width = width;
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shaderInfo->height = height;
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shaderInfo->wrapS = wrapS;
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shaderInfo->wrapT = wrapT;
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shaderInfo->texture = texture;
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}
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return true;
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}
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void SkiaBitmapShader::describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader) {
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SkBitmap bitmap;
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SkShader::TileMode xy[2];
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if (shader.asABitmap(&bitmap, nullptr, xy) != SkShader::kDefault_BitmapType) {
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LOG_ALWAYS_FATAL("SkiaBitmapShader::describe called with a different kind of shader!");
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}
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bitmapShaderHelper(caches, &description, nullptr, extensions, bitmap, xy);
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}
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void SkiaBitmapShader::setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader) {
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SkBitmap bitmap;
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SkShader::TileMode xy[2];
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if (shader.asABitmap(&bitmap, nullptr, xy) != SkShader::kDefault_BitmapType) {
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LOG_ALWAYS_FATAL("SkiaBitmapShader::setupProgram called with a different kind of shader!");
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}
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GLuint textureSlot = (*textureUnit)++;
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Caches::getInstance().activeTexture(textureSlot);
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BitmapShaderInfo shaderInfo;
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if (!bitmapShaderHelper(caches, nullptr, &shaderInfo, extensions, bitmap, xy)) {
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return;
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}
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Program* program = caches->currentProgram;
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Texture* texture = shaderInfo.texture;
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const AutoTexture autoCleanup(texture);
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mat4 textureTransform;
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computeScreenSpaceMatrix(textureTransform, SkMatrix::I(), shader.getLocalMatrix(),
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modelViewMatrix);
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// Uniforms
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bindTexture(caches, texture, shaderInfo.wrapS, shaderInfo.wrapT);
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texture->setFilter(GL_LINEAR);
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glUniform1i(program->getUniform("bitmapSampler"), textureSlot);
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glUniformMatrix4fv(program->getUniform("textureTransform"), 1,
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GL_FALSE, &textureTransform.data[0]);
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glUniform2f(program->getUniform("textureDimension"), 1.0f / shaderInfo.width,
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1.0f / shaderInfo.height);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Linear gradient shader
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///////////////////////////////////////////////////////////////////////////////
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static void toUnitMatrix(const SkPoint pts[2], SkMatrix* matrix) {
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SkVector vec = pts[1] - pts[0];
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const float mag = vec.length();
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const float inv = mag ? 1.0f / mag : 0;
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vec.scale(inv);
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matrix->setSinCos(-vec.fY, vec.fX, pts[0].fX, pts[0].fY);
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matrix->postTranslate(-pts[0].fX, -pts[0].fY);
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matrix->postScale(inv, inv);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Circular gradient shader
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///////////////////////////////////////////////////////////////////////////////
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static void toCircularUnitMatrix(const float x, const float y, const float radius,
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SkMatrix* matrix) {
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const float inv = 1.0f / radius;
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matrix->setTranslate(-x, -y);
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matrix->postScale(inv, inv);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Sweep gradient shader
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///////////////////////////////////////////////////////////////////////////////
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static void toSweepUnitMatrix(const float x, const float y, SkMatrix* matrix) {
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matrix->setTranslate(-x, -y);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Common gradient code
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///////////////////////////////////////////////////////////////////////////////
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static bool isSimpleGradient(const SkShader::GradientInfo& gradInfo) {
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return gradInfo.fColorCount == 2 && gradInfo.fTileMode == SkShader::kClamp_TileMode;
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}
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void SkiaGradientShader::describe(Caches*, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader) {
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SkShader::GradientInfo gradInfo;
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gradInfo.fColorCount = 0;
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gradInfo.fColors = nullptr;
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gradInfo.fColorOffsets = nullptr;
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switch (shader.asAGradient(&gradInfo)) {
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case SkShader::kLinear_GradientType:
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description.gradientType = ProgramDescription::kGradientLinear;
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break;
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case SkShader::kRadial_GradientType:
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description.gradientType = ProgramDescription::kGradientCircular;
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break;
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case SkShader::kSweep_GradientType:
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description.gradientType = ProgramDescription::kGradientSweep;
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break;
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default:
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// Do nothing. This shader is unsupported.
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return;
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}
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description.hasGradient = true;
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description.isSimpleGradient = isSimpleGradient(gradInfo);
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}
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void SkiaGradientShader::setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions&, const SkShader& shader) {
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// SkShader::GradientInfo.fColorCount is an in/out parameter. As input, it tells asAGradient
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// how much space has been allocated for fColors and fColorOffsets. 10 was chosen
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// arbitrarily, but should be >= 2.
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// As output, it tells the number of actual colors/offsets in the gradient.
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const int COLOR_COUNT = 10;
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SkAutoSTMalloc<COLOR_COUNT, SkColor> colorStorage(COLOR_COUNT);
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SkAutoSTMalloc<COLOR_COUNT, SkScalar> positionStorage(COLOR_COUNT);
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SkShader::GradientInfo gradInfo;
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gradInfo.fColorCount = COLOR_COUNT;
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gradInfo.fColors = colorStorage.get();
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gradInfo.fColorOffsets = positionStorage.get();
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SkShader::GradientType gradType = shader.asAGradient(&gradInfo);
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Program* program = caches->currentProgram;
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if (CC_UNLIKELY(!isSimpleGradient(gradInfo))) {
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if (gradInfo.fColorCount > COLOR_COUNT) {
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// There was not enough room in our arrays for all the colors and offsets. Try again,
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// now that we know the true number of colors.
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gradInfo.fColors = colorStorage.reset(gradInfo.fColorCount);
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gradInfo.fColorOffsets = positionStorage.reset(gradInfo.fColorCount);
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shader.asAGradient(&gradInfo);
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}
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GLuint textureSlot = (*textureUnit)++;
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caches->activeTexture(textureSlot);
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#ifndef SK_SCALAR_IS_FLOAT
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#error Need to convert gradInfo.fColorOffsets to float!
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#endif
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Texture* texture = caches->gradientCache.get(gradInfo.fColors, gradInfo.fColorOffsets,
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gradInfo.fColorCount);
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// Uniforms
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bindTexture(caches, texture, gTileModes[gradInfo.fTileMode], gTileModes[gradInfo.fTileMode]);
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glUniform1i(program->getUniform("gradientSampler"), textureSlot);
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} else {
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bindUniformColor(program->getUniform("startColor"), gradInfo.fColors[0]);
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bindUniformColor(program->getUniform("endColor"), gradInfo.fColors[1]);
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}
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caches->dither.setupProgram(program, textureUnit);
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SkMatrix unitMatrix;
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switch (gradType) {
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case SkShader::kLinear_GradientType:
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toUnitMatrix(gradInfo.fPoint, &unitMatrix);
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break;
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case SkShader::kRadial_GradientType:
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toCircularUnitMatrix(gradInfo.fPoint[0].fX, gradInfo.fPoint[0].fY,
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gradInfo.fRadius[0], &unitMatrix);
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break;
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case SkShader::kSweep_GradientType:
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toSweepUnitMatrix(gradInfo.fPoint[0].fX, gradInfo.fPoint[0].fY, &unitMatrix);
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break;
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default:
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LOG_ALWAYS_FATAL("Invalid SkShader gradient type %d", gradType);
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}
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mat4 screenSpace;
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computeScreenSpaceMatrix(screenSpace, unitMatrix, shader.getLocalMatrix(), modelViewMatrix);
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glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Compose shader
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///////////////////////////////////////////////////////////////////////////////
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void SkiaComposeShader::describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader) {
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SkShader::ComposeRec rec;
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if (!shader.asACompose(&rec)) {
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LOG_ALWAYS_FATAL("SkiaComposeShader::describe called on the wrong shader type!");
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}
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SkiaShader::describe(caches, description, extensions, *rec.fShaderA);
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SkiaShader::describe(caches, description, extensions, *rec.fShaderB);
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if (SkiaShader::getType(*rec.fShaderA) == kBitmap_SkiaShaderType) {
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description.isBitmapFirst = true;
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}
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if (!SkXfermode::AsMode(rec.fMode, &description.shadersMode)) {
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// TODO: Support other modes.
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description.shadersMode = SkXfermode::kSrcOver_Mode;
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}
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}
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void SkiaComposeShader::setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader) {
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SkShader::ComposeRec rec;
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if (!shader.asACompose(&rec)) {
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LOG_ALWAYS_FATAL("SkiaComposeShader::setupProgram called on the wrong shader type!");
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}
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// Apply this compose shader's local transform and pass it down to
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// the child shaders. They will in turn apply their local transform
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// to this matrix.
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mat4 transform;
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computeScreenSpaceMatrix(transform, SkMatrix::I(), shader.getLocalMatrix(),
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modelViewMatrix);
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SkiaShader::setupProgram(caches, transform, textureUnit, extensions, *rec.fShaderA);
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SkiaShader::setupProgram(caches, transform, textureUnit, extensions, *rec.fShaderB);
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}
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}; // namespace uirenderer
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}; // namespace android
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