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 "GrCaps.h"
9 #include "GrContext.h"
10 #include "GrDrawContext.h"
11 #include "GrImageIDTextureAdjuster.h"
12 #include "effects/GrYUVEffect.h"
13 #include "SkCanvas.h"
14 #include "SkBitmapCache.h"
15 #include "SkGpuDevice.h"
16 #include "SkGrPixelRef.h"
17 #include "SkGrPriv.h"
18 #include "SkImageFilter.h"
19 #include "SkImage_Gpu.h"
20 #include "SkPixelRef.h"
21
SkImage_Gpu(int w,int h,uint32_t uniqueID,SkAlphaType at,GrTexture * tex,SkBudgeted budgeted)22 SkImage_Gpu::SkImage_Gpu(int w, int h, uint32_t uniqueID, SkAlphaType at, GrTexture* tex,
23 SkBudgeted budgeted)
24 : INHERITED(w, h, uniqueID)
25 , fTexture(SkRef(tex))
26 , fAlphaType(at)
27 , fBudgeted(budgeted)
28 , fAddedRasterVersionToCache(false)
29 {
30 SkASSERT(tex->width() == w);
31 SkASSERT(tex->height() == h);
32 }
33
~SkImage_Gpu()34 SkImage_Gpu::~SkImage_Gpu() {
35 if (fAddedRasterVersionToCache.load()) {
36 SkNotifyBitmapGenIDIsStale(this->uniqueID());
37 }
38 }
39
SkTextureImageApplyBudgetedDecision(SkImage * image)40 extern void SkTextureImageApplyBudgetedDecision(SkImage* image) {
41 if (as_IB(image)->getTexture()) {
42 ((SkImage_Gpu*)image)->applyBudgetDecision();
43 }
44 }
45
make_info(int w,int h,bool isOpaque)46 static SkImageInfo make_info(int w, int h, bool isOpaque) {
47 return SkImageInfo::MakeN32(w, h, isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
48 }
49
getROPixels(SkBitmap * dst,CachingHint chint) const50 bool SkImage_Gpu::getROPixels(SkBitmap* dst, CachingHint chint) const {
51 if (SkBitmapCache::Find(this->uniqueID(), dst)) {
52 SkASSERT(dst->getGenerationID() == this->uniqueID());
53 SkASSERT(dst->isImmutable());
54 SkASSERT(dst->getPixels());
55 return true;
56 }
57
58 if (!dst->tryAllocPixels(make_info(this->width(), this->height(), this->isOpaque()))) {
59 return false;
60 }
61 if (!fTexture->readPixels(0, 0, dst->width(), dst->height(), kSkia8888_GrPixelConfig,
62 dst->getPixels(), dst->rowBytes())) {
63 return false;
64 }
65
66 dst->pixelRef()->setImmutableWithID(this->uniqueID());
67 if (kAllow_CachingHint == chint) {
68 SkBitmapCache::Add(this->uniqueID(), *dst);
69 fAddedRasterVersionToCache.store(true);
70 }
71 return true;
72 }
73
asBitmapForImageFilters(SkBitmap * bitmap) const74 bool SkImage_Gpu::asBitmapForImageFilters(SkBitmap* bitmap) const {
75 bitmap->setInfo(make_info(this->width(), this->height(), this->isOpaque()));
76 bitmap->setPixelRef(new SkGrPixelRef(bitmap->info(), fTexture))->unref();
77 bitmap->pixelRef()->setImmutableWithID(this->uniqueID());
78 return true;
79 }
80
asTextureRef(GrContext * ctx,const GrTextureParams & params) const81 GrTexture* SkImage_Gpu::asTextureRef(GrContext* ctx, const GrTextureParams& params) const {
82 return GrImageTextureAdjuster(as_IB(this)).refTextureSafeForParams(params, nullptr);
83 }
84
isOpaque() const85 bool SkImage_Gpu::isOpaque() const {
86 return GrPixelConfigIsOpaque(fTexture->config()) || fAlphaType == kOpaque_SkAlphaType;
87 }
88
apply_premul(const SkImageInfo & info,void * pixels,size_t rowBytes)89 static void apply_premul(const SkImageInfo& info, void* pixels, size_t rowBytes) {
90 switch (info.colorType()) {
91 case kRGBA_8888_SkColorType:
92 case kBGRA_8888_SkColorType:
93 break;
94 default:
95 return; // nothing to do
96 }
97
98 // SkColor is not necesarily RGBA or BGRA, but it is one of them on little-endian,
99 // and in either case, the alpha-byte is always in the same place, so we can safely call
100 // SkPreMultiplyColor()
101 //
102 SkColor* row = (SkColor*)pixels;
103 for (int y = 0; y < info.height(); ++y) {
104 for (int x = 0; x < info.width(); ++x) {
105 row[x] = SkPreMultiplyColor(row[x]);
106 }
107 }
108 }
109
onReadPixels(const SkImageInfo & info,void * pixels,size_t rowBytes,int srcX,int srcY,CachingHint) const110 bool SkImage_Gpu::onReadPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
111 int srcX, int srcY, CachingHint) const {
112 GrPixelConfig config = SkImageInfo2GrPixelConfig(info.colorType(), info.alphaType(),
113 info.profileType());
114 uint32_t flags = 0;
115 if (kUnpremul_SkAlphaType == info.alphaType() && kPremul_SkAlphaType == fAlphaType) {
116 // let the GPU perform this transformation for us
117 flags = GrContext::kUnpremul_PixelOpsFlag;
118 }
119 if (!fTexture->readPixels(srcX, srcY, info.width(), info.height(), config,
120 pixels, rowBytes, flags)) {
121 return false;
122 }
123 // do we have to manually fix-up the alpha channel?
124 // src dst
125 // unpremul premul fix manually
126 // premul unpremul done by kUnpremul_PixelOpsFlag
127 // all other combos need to change.
128 //
129 // Should this be handled by Ganesh? todo:?
130 //
131 if (kPremul_SkAlphaType == info.alphaType() && kUnpremul_SkAlphaType == fAlphaType) {
132 apply_premul(info, pixels, rowBytes);
133 }
134 return true;
135 }
136
onNewSubset(const SkIRect & subset) const137 SkImage* SkImage_Gpu::onNewSubset(const SkIRect& subset) const {
138 GrContext* ctx = fTexture->getContext();
139 GrSurfaceDesc desc = fTexture->desc();
140 desc.fWidth = subset.width();
141 desc.fHeight = subset.height();
142
143 GrTexture* subTx = ctx->textureProvider()->createTexture(desc, fBudgeted);
144 if (!subTx) {
145 return nullptr;
146 }
147 ctx->copySurface(subTx, fTexture, subset, SkIPoint::Make(0, 0));
148 return new SkImage_Gpu(desc.fWidth, desc.fHeight, kNeedNewImageUniqueID, fAlphaType, subTx,
149 fBudgeted);
150 }
151
152 ///////////////////////////////////////////////////////////////////////////////////////////////////
153
new_wrapped_texture_common(GrContext * ctx,const GrBackendTextureDesc & desc,SkAlphaType at,GrWrapOwnership ownership,SkImage::TextureReleaseProc releaseProc,SkImage::ReleaseContext releaseCtx)154 static SkImage* new_wrapped_texture_common(GrContext* ctx, const GrBackendTextureDesc& desc,
155 SkAlphaType at, GrWrapOwnership ownership,
156 SkImage::TextureReleaseProc releaseProc,
157 SkImage::ReleaseContext releaseCtx) {
158 if (desc.fWidth <= 0 || desc.fHeight <= 0) {
159 return nullptr;
160 }
161 SkAutoTUnref<GrTexture> tex(ctx->textureProvider()->wrapBackendTexture(desc, ownership));
162 if (!tex) {
163 return nullptr;
164 }
165 if (releaseProc) {
166 tex->setRelease(releaseProc, releaseCtx);
167 }
168
169 const SkBudgeted budgeted = SkBudgeted::kNo;
170 return new SkImage_Gpu(desc.fWidth, desc.fHeight, kNeedNewImageUniqueID, at, tex, budgeted);
171 }
172
NewFromTexture(GrContext * ctx,const GrBackendTextureDesc & desc,SkAlphaType at,TextureReleaseProc releaseP,ReleaseContext releaseC)173 SkImage* SkImage::NewFromTexture(GrContext* ctx, const GrBackendTextureDesc& desc, SkAlphaType at,
174 TextureReleaseProc releaseP, ReleaseContext releaseC) {
175 return new_wrapped_texture_common(ctx, desc, at, kBorrow_GrWrapOwnership, releaseP, releaseC);
176 }
177
NewFromAdoptedTexture(GrContext * ctx,const GrBackendTextureDesc & desc,SkAlphaType at)178 SkImage* SkImage::NewFromAdoptedTexture(GrContext* ctx, const GrBackendTextureDesc& desc,
179 SkAlphaType at) {
180 return new_wrapped_texture_common(ctx, desc, at, kAdopt_GrWrapOwnership, nullptr, nullptr);
181 }
182
NewFromTextureCopy(GrContext * ctx,const GrBackendTextureDesc & desc,SkAlphaType at)183 SkImage* SkImage::NewFromTextureCopy(GrContext* ctx, const GrBackendTextureDesc& desc,
184 SkAlphaType at) {
185 if (desc.fWidth <= 0 || desc.fHeight <= 0) {
186 return nullptr;
187 }
188
189 SkAutoTUnref<GrTexture> src(ctx->textureProvider()->wrapBackendTexture(
190 desc, kBorrow_GrWrapOwnership));
191 if (!src) {
192 return nullptr;
193 }
194
195 SkAutoTUnref<GrTexture> dst(GrDeepCopyTexture(src, SkBudgeted::kYes));
196 if (!dst) {
197 return nullptr;
198 }
199
200 return new SkImage_Gpu(desc.fWidth, desc.fHeight, kNeedNewImageUniqueID, at, dst,
201 SkBudgeted::kYes);
202 }
203
NewFromYUVTexturesCopy(GrContext * ctx,SkYUVColorSpace colorSpace,const GrBackendObject yuvTextureHandles[3],const SkISize yuvSizes[3],GrSurfaceOrigin origin)204 SkImage* SkImage::NewFromYUVTexturesCopy(GrContext* ctx , SkYUVColorSpace colorSpace,
205 const GrBackendObject yuvTextureHandles[3],
206 const SkISize yuvSizes[3],
207 GrSurfaceOrigin origin) {
208 const SkBudgeted budgeted = SkBudgeted::kYes;
209
210 if (yuvSizes[0].fWidth <= 0 || yuvSizes[0].fHeight <= 0 ||
211 yuvSizes[1].fWidth <= 0 || yuvSizes[1].fHeight <= 0 ||
212 yuvSizes[2].fWidth <= 0 || yuvSizes[2].fHeight <= 0) {
213 return nullptr;
214 }
215 static const GrPixelConfig kConfig = kAlpha_8_GrPixelConfig;
216 GrBackendTextureDesc yDesc;
217 yDesc.fConfig = kConfig;
218 yDesc.fOrigin = origin;
219 yDesc.fSampleCnt = 0;
220 yDesc.fTextureHandle = yuvTextureHandles[0];
221 yDesc.fWidth = yuvSizes[0].fWidth;
222 yDesc.fHeight = yuvSizes[0].fHeight;
223
224 GrBackendTextureDesc uDesc;
225 uDesc.fConfig = kConfig;
226 uDesc.fOrigin = origin;
227 uDesc.fSampleCnt = 0;
228 uDesc.fTextureHandle = yuvTextureHandles[1];
229 uDesc.fWidth = yuvSizes[1].fWidth;
230 uDesc.fHeight = yuvSizes[1].fHeight;
231
232 GrBackendTextureDesc vDesc;
233 vDesc.fConfig = kConfig;
234 vDesc.fOrigin = origin;
235 vDesc.fSampleCnt = 0;
236 vDesc.fTextureHandle = yuvTextureHandles[2];
237 vDesc.fWidth = yuvSizes[2].fWidth;
238 vDesc.fHeight = yuvSizes[2].fHeight;
239
240 SkAutoTUnref<GrTexture> yTex(ctx->textureProvider()->wrapBackendTexture(
241 yDesc, kBorrow_GrWrapOwnership));
242 SkAutoTUnref<GrTexture> uTex(ctx->textureProvider()->wrapBackendTexture(
243 uDesc, kBorrow_GrWrapOwnership));
244 SkAutoTUnref<GrTexture> vTex(ctx->textureProvider()->wrapBackendTexture(
245 vDesc, kBorrow_GrWrapOwnership));
246 if (!yTex || !uTex || !vTex) {
247 return nullptr;
248 }
249
250 GrSurfaceDesc dstDesc;
251 // Needs to be a render target in order to draw to it for the yuv->rgb conversion.
252 dstDesc.fFlags = kRenderTarget_GrSurfaceFlag;
253 dstDesc.fOrigin = origin;
254 dstDesc.fWidth = yuvSizes[0].fWidth;
255 dstDesc.fHeight = yuvSizes[0].fHeight;
256 dstDesc.fConfig = kRGBA_8888_GrPixelConfig;
257 dstDesc.fSampleCnt = 0;
258
259 SkAutoTUnref<GrTexture> dst(ctx->textureProvider()->createTexture(dstDesc, SkBudgeted::kYes));
260 if (!dst) {
261 return nullptr;
262 }
263
264 GrPaint paint;
265 paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
266 paint.addColorFragmentProcessor(GrYUVEffect::CreateYUVToRGB(yTex, uTex, vTex, yuvSizes,
267 colorSpace))->unref();
268
269 const SkRect rect = SkRect::MakeWH(SkIntToScalar(dstDesc.fWidth),
270 SkIntToScalar(dstDesc.fHeight));
271 SkAutoTUnref<GrDrawContext> drawContext(ctx->drawContext(dst->asRenderTarget()));
272 if (!drawContext) {
273 return nullptr;
274 }
275
276 drawContext->drawRect(GrClip::WideOpen(), paint, SkMatrix::I(), rect);
277 ctx->flushSurfaceWrites(dst);
278 return new SkImage_Gpu(dstDesc.fWidth, dstDesc.fHeight, kNeedNewImageUniqueID,
279 kOpaque_SkAlphaType, dst, budgeted);
280 }
281
create_image_from_maker(GrTextureMaker * maker,SkAlphaType at,uint32_t id)282 static SkImage* create_image_from_maker(GrTextureMaker* maker, SkAlphaType at, uint32_t id) {
283 SkAutoTUnref<GrTexture> texture(maker->refTextureForParams(GrTextureParams::ClampNoFilter()));
284 if (!texture) {
285 return nullptr;
286 }
287 return new SkImage_Gpu(texture->width(), texture->height(), id, at, texture,
288 SkBudgeted::kNo);
289 }
290
newTextureImage(GrContext * context) const291 SkImage* SkImage::newTextureImage(GrContext *context) const {
292 if (!context) {
293 return nullptr;
294 }
295 if (GrTexture* peek = as_IB(this)->peekTexture()) {
296 return peek->getContext() == context ? SkRef(const_cast<SkImage*>(this)) : nullptr;
297 }
298 // No way to check whether a image is premul or not?
299 SkAlphaType at = this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
300
301 if (SkImageCacherator* cacher = as_IB(this)->peekCacherator()) {
302 GrImageTextureMaker maker(context, cacher, this, kDisallow_CachingHint);
303 return create_image_from_maker(&maker, at, this->uniqueID());
304 }
305 SkBitmap bmp;
306 if (!this->asLegacyBitmap(&bmp, kRO_LegacyBitmapMode)) {
307 return nullptr;
308 }
309 GrBitmapTextureMaker maker(context, bmp);
310 return create_image_from_maker(&maker, at, this->uniqueID());
311 }
312
313 ///////////////////////////////////////////////////////////////////////////////////////////////////
314
GrDeepCopyTexture(GrTexture * src,SkBudgeted budgeted)315 GrTexture* GrDeepCopyTexture(GrTexture* src, SkBudgeted budgeted) {
316 GrContext* ctx = src->getContext();
317
318 GrSurfaceDesc desc = src->desc();
319 GrTexture* dst = ctx->textureProvider()->createTexture(desc, budgeted, nullptr, 0);
320 if (!dst) {
321 return nullptr;
322 }
323
324 const SkIRect srcR = SkIRect::MakeWH(desc.fWidth, desc.fHeight);
325 const SkIPoint dstP = SkIPoint::Make(0, 0);
326 ctx->copySurface(dst, src, srcR, dstP);
327 ctx->flushSurfaceWrites(dst);
328 return dst;
329 }
330
331