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
22SkImage_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
34SkImage_Gpu::~SkImage_Gpu() {
35    if (fAddedRasterVersionToCache.load()) {
36        SkNotifyBitmapGenIDIsStale(this->uniqueID());
37    }
38}
39
40extern void SkTextureImageApplyBudgetedDecision(SkImage* image) {
41    if (as_IB(image)->getTexture()) {
42        ((SkImage_Gpu*)image)->applyBudgetDecision();
43    }
44}
45
46static SkImageInfo make_info(int w, int h, bool isOpaque) {
47    return SkImageInfo::MakeN32(w, h, isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
48}
49
50bool 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
74bool 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
81GrTexture* SkImage_Gpu::asTextureRef(GrContext* ctx, const GrTextureParams& params) const {
82    return GrImageTextureAdjuster(as_IB(this)).refTextureSafeForParams(params, nullptr);
83}
84
85bool SkImage_Gpu::isOpaque() const {
86    return GrPixelConfigIsOpaque(fTexture->config()) || fAlphaType == kOpaque_SkAlphaType;
87}
88
89static 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
110bool 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
137SkImage* 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
154static 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
173SkImage* 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
178SkImage* 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
183SkImage* 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
204SkImage* 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
282static 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
291SkImage* 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
315GrTexture* 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