1 /*
2 * Copyright 2016 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 "SkCanvas.h"
9 #include "SkSpecialImage.h"
10 #include "SkSpecialSurface.h"
11 #include "SkSurfacePriv.h"
12
13 ///////////////////////////////////////////////////////////////////////////////
14 class SkSpecialSurface_Base : public SkSpecialSurface {
15 public:
SkSpecialSurface_Base(const SkIRect & subset,const SkSurfaceProps * props)16 SkSpecialSurface_Base(const SkIRect& subset, const SkSurfaceProps* props)
17 : INHERITED(subset, props)
18 , fCanvas(nullptr) {
19 }
20
~SkSpecialSurface_Base()21 virtual ~SkSpecialSurface_Base() { }
22
23 // reset is called after an SkSpecialImage has been snapped
reset()24 void reset() { fCanvas.reset(); }
25
26 // This can return nullptr if reset has already been called or something when wrong in the ctor
onGetCanvas()27 SkCanvas* onGetCanvas() { return fCanvas.get(); }
28
29 virtual sk_sp<SkSpecialImage> onMakeImageSnapshot() = 0;
30
31 protected:
32 std::unique_ptr<SkCanvas> fCanvas; // initialized by derived classes in ctors
33
34 private:
35 typedef SkSpecialSurface INHERITED;
36 };
37
38 ///////////////////////////////////////////////////////////////////////////////
as_SB(SkSpecialSurface * surface)39 static SkSpecialSurface_Base* as_SB(SkSpecialSurface* surface) {
40 return static_cast<SkSpecialSurface_Base*>(surface);
41 }
42
SkSpecialSurface(const SkIRect & subset,const SkSurfaceProps * props)43 SkSpecialSurface::SkSpecialSurface(const SkIRect& subset,
44 const SkSurfaceProps* props)
45 : fProps(SkSurfacePropsCopyOrDefault(props).flags(), kUnknown_SkPixelGeometry)
46 , fSubset(subset) {
47 SkASSERT(fSubset.width() > 0);
48 SkASSERT(fSubset.height() > 0);
49 }
50
getCanvas()51 SkCanvas* SkSpecialSurface::getCanvas() {
52 return as_SB(this)->onGetCanvas();
53 }
54
makeImageSnapshot()55 sk_sp<SkSpecialImage> SkSpecialSurface::makeImageSnapshot() {
56 sk_sp<SkSpecialImage> image(as_SB(this)->onMakeImageSnapshot());
57 as_SB(this)->reset();
58 return image; // the caller gets the creation ref
59 }
60
61 ///////////////////////////////////////////////////////////////////////////////
62 #include "SkMallocPixelRef.h"
63
64 class SkSpecialSurface_Raster : public SkSpecialSurface_Base {
65 public:
SkSpecialSurface_Raster(sk_sp<SkPixelRef> pr,const SkIRect & subset,const SkSurfaceProps * props)66 SkSpecialSurface_Raster(sk_sp<SkPixelRef> pr,
67 const SkIRect& subset,
68 const SkSurfaceProps* props)
69 : INHERITED(subset, props) {
70 const SkImageInfo& info = pr->info();
71
72 fBitmap.setInfo(info, info.minRowBytes());
73 fBitmap.setPixelRef(std::move(pr), 0, 0);
74
75 fCanvas.reset(new SkCanvas(fBitmap, this->props()));
76 fCanvas->clipRect(SkRect::Make(subset));
77 #ifdef SK_IS_BOT
78 fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness
79 #endif
80 }
81
~SkSpecialSurface_Raster()82 ~SkSpecialSurface_Raster() override { }
83
onMakeImageSnapshot()84 sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
85 return SkSpecialImage::MakeFromRaster(this->subset(), fBitmap, &this->props());
86 }
87
88 private:
89 SkBitmap fBitmap;
90
91 typedef SkSpecialSurface_Base INHERITED;
92 };
93
MakeFromBitmap(const SkIRect & subset,SkBitmap & bm,const SkSurfaceProps * props)94 sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromBitmap(const SkIRect& subset, SkBitmap& bm,
95 const SkSurfaceProps* props) {
96 return sk_make_sp<SkSpecialSurface_Raster>(sk_ref_sp(bm.pixelRef()), subset, props);
97 }
98
MakeRaster(const SkImageInfo & info,const SkSurfaceProps * props)99 sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(const SkImageInfo& info,
100 const SkSurfaceProps* props) {
101 sk_sp<SkPixelRef> pr(SkMallocPixelRef::NewZeroed(info, 0, nullptr));
102 if (nullptr == pr.get()) {
103 return nullptr;
104 }
105
106 const SkIRect subset = SkIRect::MakeWH(pr->info().width(), pr->info().height());
107
108 return sk_make_sp<SkSpecialSurface_Raster>(std::move(pr), subset, props);
109 }
110
111 #if SK_SUPPORT_GPU
112 ///////////////////////////////////////////////////////////////////////////////
113 #include "GrContext.h"
114 #include "SkGpuDevice.h"
115
116 class SkSpecialSurface_Gpu : public SkSpecialSurface_Base {
117 public:
SkSpecialSurface_Gpu(GrContext * context,sk_sp<GrRenderTargetContext> renderTargetContext,int width,int height,const SkIRect & subset)118 SkSpecialSurface_Gpu(GrContext* context, sk_sp<GrRenderTargetContext> renderTargetContext,
119 int width, int height, const SkIRect& subset)
120 : INHERITED(subset, &renderTargetContext->surfaceProps())
121 , fRenderTargetContext(std::move(renderTargetContext)) {
122
123 sk_sp<SkBaseDevice> device(SkGpuDevice::Make(context, fRenderTargetContext, width, height,
124 SkGpuDevice::kUninit_InitContents));
125 if (!device) {
126 return;
127 }
128
129 fCanvas.reset(new SkCanvas(device.get()));
130 fCanvas->clipRect(SkRect::Make(subset));
131 #ifdef SK_IS_BOT
132 fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness
133 #endif
134 }
135
~SkSpecialSurface_Gpu()136 ~SkSpecialSurface_Gpu() override { }
137
onMakeImageSnapshot()138 sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
139 if (!fRenderTargetContext->asTexture()) {
140 return nullptr;
141 }
142 sk_sp<SkSpecialImage> tmp(SkSpecialImage::MakeDeferredFromGpu(
143 fCanvas->getGrContext(),
144 this->subset(),
145 kNeedNewImageUniqueID_SpecialImage,
146 fRenderTargetContext->asTextureProxyRef(),
147 fRenderTargetContext->refColorSpace(),
148 &this->props()));
149 fRenderTargetContext = nullptr;
150 return tmp;
151 }
152
153 private:
154 sk_sp<GrRenderTargetContext> fRenderTargetContext;
155
156 typedef SkSpecialSurface_Base INHERITED;
157 };
158
MakeRenderTarget(GrContext * context,int width,int height,GrPixelConfig config,sk_sp<SkColorSpace> colorSpace)159 sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(GrContext* context,
160 int width, int height,
161 GrPixelConfig config,
162 sk_sp<SkColorSpace> colorSpace) {
163 if (!context) {
164 return nullptr;
165 }
166
167 sk_sp<GrRenderTargetContext> renderTargetContext(context->makeRenderTargetContext(
168 SkBackingFit::kApprox, width, height, config, std::move(colorSpace)));
169 if (!renderTargetContext) {
170 return nullptr;
171 }
172
173 const SkIRect subset = SkIRect::MakeWH(width, height);
174
175 return sk_make_sp<SkSpecialSurface_Gpu>(context, std::move(renderTargetContext),
176 width, height, subset);
177 }
178
179 #endif
180