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 "include/core/SkCanvas.h"
9 #include "src/core/SkSpecialImage.h"
10 #include "src/core/SkSpecialSurface.h"
11 #include "src/core/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 "include/core/SkMallocPixelRef.h"
63
64 class SkSpecialSurface_Raster : public SkSpecialSurface_Base {
65 public:
SkSpecialSurface_Raster(const SkImageInfo & info,sk_sp<SkPixelRef> pr,const SkIRect & subset,const SkSurfaceProps * props)66 SkSpecialSurface_Raster(const SkImageInfo& info,
67 sk_sp<SkPixelRef> pr,
68 const SkIRect& subset,
69 const SkSurfaceProps* props)
70 : INHERITED(subset, props) {
71 SkASSERT(info.width() == pr->width() && info.height() == pr->height());
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 if (subset.isEmpty() || !SkSurfaceValidateRasterInfo(bm.info(), bm.rowBytes())) {
97 return nullptr;
98 }
99 return sk_make_sp<SkSpecialSurface_Raster>(bm.info(), sk_ref_sp(bm.pixelRef()), subset, props);
100 }
101
MakeRaster(const SkImageInfo & info,const SkSurfaceProps * props)102 sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(const SkImageInfo& info,
103 const SkSurfaceProps* props) {
104 if (!SkSurfaceValidateRasterInfo(info)) {
105 return nullptr;
106 }
107
108 sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(info, 0);
109 if (!pr) {
110 return nullptr;
111 }
112
113 const SkIRect subset = SkIRect::MakeWH(info.width(), info.height());
114
115 return sk_make_sp<SkSpecialSurface_Raster>(info, std::move(pr), subset, props);
116 }
117
118 #if SK_SUPPORT_GPU
119 ///////////////////////////////////////////////////////////////////////////////
120 #include "include/gpu/GrBackendSurface.h"
121 #include "include/private/GrRecordingContext.h"
122 #include "src/gpu/GrRecordingContextPriv.h"
123 #include "src/gpu/SkGpuDevice.h"
124
125 class SkSpecialSurface_Gpu : public SkSpecialSurface_Base {
126 public:
SkSpecialSurface_Gpu(GrRecordingContext * context,sk_sp<GrRenderTargetContext> renderTargetContext,int width,int height,const SkIRect & subset)127 SkSpecialSurface_Gpu(GrRecordingContext* context,
128 sk_sp<GrRenderTargetContext> renderTargetContext,
129 int width, int height, const SkIRect& subset)
130 : INHERITED(subset, &renderTargetContext->surfaceProps())
131 , fRenderTargetContext(std::move(renderTargetContext)) {
132
133 // CONTEXT TODO: remove this use of 'backdoor' to create an SkGpuDevice
134 sk_sp<SkBaseDevice> device(SkGpuDevice::Make(context->priv().backdoor(),
135 fRenderTargetContext, width, height,
136 SkGpuDevice::kUninit_InitContents));
137 if (!device) {
138 return;
139 }
140
141 fCanvas.reset(new SkCanvas(device));
142 fCanvas->clipRect(SkRect::Make(subset));
143 #ifdef SK_IS_BOT
144 fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness
145 #endif
146 }
147
~SkSpecialSurface_Gpu()148 ~SkSpecialSurface_Gpu() override { }
149
onMakeImageSnapshot()150 sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
151 if (!fRenderTargetContext->asTextureProxy()) {
152 return nullptr;
153 }
154 sk_sp<SkSpecialImage> tmp(SkSpecialImage::MakeDeferredFromGpu(
155 fCanvas->getGrContext(),
156 this->subset(),
157 kNeedNewImageUniqueID_SpecialImage,
158 fRenderTargetContext->asTextureProxyRef(),
159 fRenderTargetContext->colorSpaceInfo().refColorSpace(),
160 &this->props()));
161 fRenderTargetContext = nullptr;
162 return tmp;
163 }
164
165 private:
166 sk_sp<GrRenderTargetContext> fRenderTargetContext;
167
168 typedef SkSpecialSurface_Base INHERITED;
169 };
170
MakeRenderTarget(GrRecordingContext * context,int width,int height,GrColorType colorType,sk_sp<SkColorSpace> colorSpace,const SkSurfaceProps * props)171 sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(GrRecordingContext* context,
172 int width, int height,
173 GrColorType colorType,
174 sk_sp<SkColorSpace> colorSpace,
175 const SkSurfaceProps* props) {
176 if (!context) {
177 return nullptr;
178 }
179 sk_sp<GrRenderTargetContext> renderTargetContext(
180 context->priv().makeDeferredRenderTargetContext(
181 SkBackingFit::kApprox, width, height, colorType, std::move(colorSpace), 1,
182 GrMipMapped::kNo, kBottomLeft_GrSurfaceOrigin, props));
183 if (!renderTargetContext) {
184 return nullptr;
185 }
186
187 const SkIRect subset = SkIRect::MakeWH(width, height);
188
189 return sk_make_sp<SkSpecialSurface_Gpu>(context, std::move(renderTargetContext),
190 width, height, subset);
191 }
192
193 #endif
194