1/* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "GrYUVProvider.h" 9#include "GrClip.h" 10#include "GrContext.h" 11#include "GrContextPriv.h" 12#include "GrRenderTargetContext.h" 13#include "GrTextureProxy.h" 14#include "SkAutoMalloc.h" 15#include "SkCachedData.h" 16#include "SkRefCnt.h" 17#include "SkResourceCache.h" 18#include "SkYUVPlanesCache.h" 19#include "effects/GrSRGBEffect.h" 20#include "effects/GrYUVEffect.h" 21 22namespace { 23/** 24 * Helper class to manage the resources used for storing the YUV planar data. Depending on the 25 * useCache option, we may find (and lock) the data in our ResourceCache, or we may have allocated 26 * it in scratch storage. 27 */ 28class YUVScoper { 29public: 30 bool init(GrYUVProvider*, SkYUVPlanesCache::Info*, void* planes[3], bool useCache); 31 32private: 33 // we only use one or the other of these 34 sk_sp<SkCachedData> fCachedData; 35 SkAutoMalloc fStorage; 36}; 37} 38 39bool YUVScoper::init(GrYUVProvider* provider, SkYUVPlanesCache::Info* yuvInfo, void* planes[3], 40 bool useCache) { 41 if (useCache) { 42 fCachedData.reset(SkYUVPlanesCache::FindAndRef(provider->onGetID(), yuvInfo)); 43 } 44 45 if (fCachedData.get()) { 46 planes[0] = (void*)fCachedData->data(); 47 planes[1] = (uint8_t*)planes[0] + (yuvInfo->fSizeInfo.fWidthBytes[SkYUVSizeInfo::kY] * 48 yuvInfo->fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight); 49 planes[2] = (uint8_t*)planes[1] + (yuvInfo->fSizeInfo.fWidthBytes[SkYUVSizeInfo::kU] * 50 yuvInfo->fSizeInfo.fSizes[SkYUVSizeInfo::kU].fHeight); 51 } else { 52 // Fetch yuv plane sizes for memory allocation. 53 if (!provider->onQueryYUV8(&yuvInfo->fSizeInfo, &yuvInfo->fColorSpace)) { 54 return false; 55 } 56 57 // Allocate the memory for YUV 58 size_t totalSize(0); 59 for (int i = 0; i < 3; i++) { 60 totalSize += yuvInfo->fSizeInfo.fWidthBytes[i] * yuvInfo->fSizeInfo.fSizes[i].fHeight; 61 } 62 if (useCache) { 63 fCachedData.reset(SkResourceCache::NewCachedData(totalSize)); 64 planes[0] = fCachedData->writable_data(); 65 } else { 66 fStorage.reset(totalSize); 67 planes[0] = fStorage.get(); 68 } 69 planes[1] = (uint8_t*)planes[0] + (yuvInfo->fSizeInfo.fWidthBytes[SkYUVSizeInfo::kY] * 70 yuvInfo->fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight); 71 planes[2] = (uint8_t*)planes[1] + (yuvInfo->fSizeInfo.fWidthBytes[SkYUVSizeInfo::kU] * 72 yuvInfo->fSizeInfo.fSizes[SkYUVSizeInfo::kU].fHeight); 73 74 // Get the YUV planes. 75 if (!provider->onGetYUV8Planes(yuvInfo->fSizeInfo, planes)) { 76 return false; 77 } 78 79 if (useCache) { 80 // Decoding is done, cache the resulting YUV planes 81 SkYUVPlanesCache::Add(provider->onGetID(), fCachedData.get(), yuvInfo); 82 } 83 } 84 return true; 85} 86 87sk_sp<GrTextureProxy> GrYUVProvider::refAsTextureProxy(GrContext* ctx, 88 const GrSurfaceDesc& desc, 89 bool useCache) { 90 SkYUVPlanesCache::Info yuvInfo; 91 void* planes[3]; 92 YUVScoper scoper; 93 if (!scoper.init(this, &yuvInfo, planes, useCache)) { 94 return nullptr; 95 } 96 97 GrSurfaceDesc yuvDesc; 98 yuvDesc.fOrigin = kTopLeft_GrSurfaceOrigin; 99 yuvDesc.fConfig = kAlpha_8_GrPixelConfig; 100 sk_sp<GrSurfaceContext> yuvTextureContexts[3]; 101 for (int i = 0; i < 3; i++) { 102 yuvDesc.fWidth = yuvInfo.fSizeInfo.fSizes[i].fWidth; 103 yuvDesc.fHeight = yuvInfo.fSizeInfo.fSizes[i].fHeight; 104 // TODO: why do we need this check? 105 SkBackingFit fit = 106 (yuvDesc.fWidth != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth) || 107 (yuvDesc.fHeight != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight) 108 ? SkBackingFit::kExact : SkBackingFit::kApprox; 109 110 yuvTextureContexts[i] = ctx->contextPriv().makeDeferredSurfaceContext(yuvDesc, fit, 111 SkBudgeted::kYes); 112 if (!yuvTextureContexts[i]) { 113 return nullptr; 114 } 115 116 const SkImageInfo ii = SkImageInfo::MakeA8(yuvDesc.fWidth, yuvDesc.fHeight); 117 if (!yuvTextureContexts[i]->writePixels(ii, planes[i], 118 yuvInfo.fSizeInfo.fWidthBytes[i], 0, 0)) { 119 return nullptr; 120 } 121 } 122 123 // We never want to perform color-space conversion during the decode 124 sk_sp<GrRenderTargetContext> renderTargetContext(ctx->makeRenderTargetContext( 125 SkBackingFit::kExact, 126 desc.fWidth, desc.fHeight, 127 desc.fConfig, nullptr, 128 desc.fSampleCnt)); 129 if (!renderTargetContext) { 130 return nullptr; 131 } 132 133 GrPaint paint; 134 sk_sp<GrFragmentProcessor> yuvToRgbProcessor( 135 GrYUVEffect::MakeYUVToRGB(ctx->resourceProvider(), 136 yuvTextureContexts[0]->asTextureProxyRef(), 137 yuvTextureContexts[1]->asTextureProxyRef(), 138 yuvTextureContexts[2]->asTextureProxyRef(), 139 yuvInfo.fSizeInfo.fSizes, yuvInfo.fColorSpace, false)); 140 paint.addColorFragmentProcessor(std::move(yuvToRgbProcessor)); 141 142 // If we're decoding an sRGB image, the result of our linear math on the YUV planes is already 143 // in sRGB. (The encoding is just math on bytes, with no concept of color spaces.) So, we need 144 // to output the results of that math directly to the buffer that we will then consider sRGB. 145 // If we have sRGB write control, we can just tell the HW not to do the Linear -> sRGB step. 146 // Otherwise, we do our shader math to go from YUV -> sRGB, manually convert sRGB -> Linear, 147 // then let the HW convert Linear -> sRGB. 148 if (GrPixelConfigIsSRGB(desc.fConfig)) { 149 if (ctx->caps()->srgbWriteControl()) { 150 paint.setDisableOutputConversionToSRGB(true); 151 } else { 152 paint.addColorFragmentProcessor(GrSRGBEffect::Make(GrSRGBEffect::Mode::kSRGBToLinear)); 153 } 154 } 155 156 paint.setPorterDuffXPFactory(SkBlendMode::kSrc); 157 const SkRect r = SkRect::MakeIWH(yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth, 158 yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight); 159 160 renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), r); 161 162 return renderTargetContext->asTextureProxyRef(); 163} 164