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comparison: gfx/skia/trunk/src/image/SkSurface_Gpu.cpp
gfx/skia/trunk/src/image/SkSurface_Gpu.cpp
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| -1:000000000000 | 0:9f498383f63f |
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| 1 /* | |
| 2 * Copyright 2012 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 "SkSurface_Base.h" | |
| 9 #include "SkImagePriv.h" | |
| 10 #include "SkCanvas.h" | |
| 11 #include "SkGpuDevice.h" | |
| 12 | |
| 13 class SkSurface_Gpu : public SkSurface_Base { | |
| 14 public: | |
| 15 SK_DECLARE_INST_COUNT(SkSurface_Gpu) | |
| 16 | |
| 17 SkSurface_Gpu(GrRenderTarget*); | |
| 18 virtual ~SkSurface_Gpu(); | |
| 19 | |
| 20 virtual SkCanvas* onNewCanvas() SK_OVERRIDE; | |
| 21 virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE; | |
| 22 virtual SkImage* onNewImageSnapshot() SK_OVERRIDE; | |
| 23 virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, | |
| 24 const SkPaint*) SK_OVERRIDE; | |
| 25 virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE; | |
| 26 | |
| 27 private: | |
| 28 SkGpuDevice* fDevice; | |
| 29 | |
| 30 typedef SkSurface_Base INHERITED; | |
| 31 }; | |
| 32 | |
| 33 /////////////////////////////////////////////////////////////////////////////// | |
| 34 | |
| 35 SkSurface_Gpu::SkSurface_Gpu(GrRenderTarget* renderTarget) | |
| 36 : INHERITED(renderTarget->width(), renderTarget->height()) { | |
| 37 fDevice = SkNEW_ARGS(SkGpuDevice, (renderTarget->getContext(), renderTarget)); | |
| 38 | |
| 39 if (kRGB_565_GrPixelConfig != renderTarget->config()) { | |
| 40 fDevice->clear(0x0); | |
| 41 } | |
| 42 } | |
| 43 | |
| 44 SkSurface_Gpu::~SkSurface_Gpu() { | |
| 45 SkSafeUnref(fDevice); | |
| 46 } | |
| 47 | |
| 48 SkCanvas* SkSurface_Gpu::onNewCanvas() { | |
| 49 return SkNEW_ARGS(SkCanvas, (fDevice)); | |
| 50 } | |
| 51 | |
| 52 SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) { | |
| 53 GrRenderTarget* rt = fDevice->accessRenderTarget(); | |
| 54 int sampleCount = rt->numSamples(); | |
| 55 return SkSurface::NewRenderTarget(fDevice->context(), info, sampleCount); | |
| 56 } | |
| 57 | |
| 58 SkImage* SkSurface_Gpu::onNewImageSnapshot() { | |
| 59 return SkImage::NewTexture(fDevice->accessBitmap(false)); | |
| 60 } | |
| 61 | |
| 62 void SkSurface_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, | |
| 63 const SkPaint* paint) { | |
| 64 canvas->drawBitmap(fDevice->accessBitmap(false), x, y, paint); | |
| 65 } | |
| 66 | |
| 67 // Create a new SkGpuDevice and, if necessary, copy the contents of the old | |
| 68 // device into it. Note that this flushes the SkGpuDevice but | |
| 69 // doesn't force an OpenGL flush. | |
| 70 void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) { | |
| 71 GrRenderTarget* rt = fDevice->accessRenderTarget(); | |
| 72 // are we sharing our render target with the image? | |
| 73 SkASSERT(NULL != this->getCachedImage()); | |
| 74 if (rt->asTexture() == SkTextureImageGetTexture(this->getCachedImage())) { | |
| 75 // We call createCompatibleDevice because it uses the texture cache. This isn't | |
| 76 // necessarily correct (http://skbug.com/2252), but never using the cache causes | |
| 77 // a Chromium regression. (http://crbug.com/344020) | |
| 78 SkGpuDevice* newDevice = static_cast<SkGpuDevice*>( | |
| 79 fDevice->createCompatibleDevice(fDevice->imageInfo())); | |
| 80 SkAutoTUnref<SkGpuDevice> aurd(newDevice); | |
| 81 if (kRetain_ContentChangeMode == mode) { | |
| 82 fDevice->context()->copyTexture(rt->asTexture(), newDevice->accessRenderTarget()); | |
| 83 } | |
| 84 SkASSERT(NULL != this->getCachedCanvas()); | |
| 85 SkASSERT(this->getCachedCanvas()->getDevice() == fDevice); | |
| 86 | |
| 87 this->getCachedCanvas()->setRootDevice(newDevice); | |
| 88 SkRefCnt_SafeAssign(fDevice, newDevice); | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 /////////////////////////////////////////////////////////////////////////////// | |
| 93 | |
| 94 SkSurface* SkSurface::NewRenderTargetDirect(GrRenderTarget* target) { | |
| 95 if (NULL == target) { | |
| 96 return NULL; | |
| 97 } | |
| 98 return SkNEW_ARGS(SkSurface_Gpu, (target)); | |
| 99 } | |
| 100 | |
| 101 SkSurface* SkSurface::NewRenderTarget(GrContext* ctx, const SkImageInfo& info, int sampleCount) { | |
| 102 if (NULL == ctx) { | |
| 103 return NULL; | |
| 104 } | |
| 105 | |
| 106 SkBitmap::Config config = SkImageInfoToBitmapConfig(info); | |
| 107 | |
| 108 GrTextureDesc desc; | |
| 109 desc.fFlags = kRenderTarget_GrTextureFlagBit | kCheckAllocation_GrTextureFlagBit; | |
| 110 desc.fWidth = info.fWidth; | |
| 111 desc.fHeight = info.fHeight; | |
| 112 desc.fConfig = SkBitmapConfig2GrPixelConfig(config); | |
| 113 desc.fSampleCnt = sampleCount; | |
| 114 | |
| 115 SkAutoTUnref<GrTexture> tex(ctx->createUncachedTexture(desc, NULL, 0)); | |
| 116 if (NULL == tex) { | |
| 117 return NULL; | |
| 118 } | |
| 119 | |
| 120 return SkNEW_ARGS(SkSurface_Gpu, (tex->asRenderTarget())); | |
| 121 } |
