robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 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 | |
| 12 | /////////////////////////////////////////////////////////////////////////////// |
| 13 | class SkSpecialImage_Base : public SkSpecialImage { |
| 14 | public: |
| 15 | SkSpecialImage_Base(const SkIRect& subset) : INHERITED(subset) { } |
| 16 | virtual ~SkSpecialImage_Base() { } |
| 17 | |
robertphillips | e8c3497 | 2016-02-16 12:09:36 -0800 | [diff] [blame^] | 18 | virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) const = 0; |
robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 19 | |
| 20 | virtual bool onPeekPixels(SkPixmap*) const { return false; } |
| 21 | |
| 22 | virtual GrTexture* onPeekTexture() const { return nullptr; } |
| 23 | |
| 24 | virtual SkSpecialSurface* onNewSurface(const SkImageInfo& info) const { return nullptr; } |
| 25 | |
| 26 | private: |
| 27 | typedef SkSpecialImage INHERITED; |
| 28 | }; |
| 29 | |
| 30 | /////////////////////////////////////////////////////////////////////////////// |
| 31 | static inline const SkSpecialImage_Base* as_IB(const SkSpecialImage* image) { |
| 32 | return static_cast<const SkSpecialImage_Base*>(image); |
| 33 | } |
| 34 | |
robertphillips | e8c3497 | 2016-02-16 12:09:36 -0800 | [diff] [blame^] | 35 | void SkSpecialImage::draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const { |
robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 36 | return as_IB(this)->onDraw(canvas, x, y, paint); |
| 37 | } |
| 38 | |
| 39 | bool SkSpecialImage::peekPixels(SkPixmap* pixmap) const { |
| 40 | return as_IB(this)->onPeekPixels(pixmap); |
| 41 | } |
| 42 | |
| 43 | GrTexture* SkSpecialImage::peekTexture() const { |
| 44 | return as_IB(this)->onPeekTexture(); |
| 45 | } |
| 46 | |
| 47 | SkSpecialSurface* SkSpecialImage::newSurface(const SkImageInfo& info) const { |
| 48 | return as_IB(this)->onNewSurface(info); |
| 49 | } |
| 50 | |
| 51 | /////////////////////////////////////////////////////////////////////////////// |
| 52 | #include "SkImage.h" |
| 53 | #if SK_SUPPORT_GPU |
| 54 | #include "SkGr.h" |
| 55 | #include "SkGrPriv.h" |
| 56 | #endif |
| 57 | |
| 58 | class SkSpecialImage_Image : public SkSpecialImage_Base { |
| 59 | public: |
| 60 | SkSpecialImage_Image(const SkIRect& subset, const SkImage* image) |
| 61 | : INHERITED(subset) |
| 62 | , fImage(SkRef(image)) { |
| 63 | } |
| 64 | |
| 65 | ~SkSpecialImage_Image() override { } |
| 66 | |
robertphillips | e8c3497 | 2016-02-16 12:09:36 -0800 | [diff] [blame^] | 67 | void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const override { |
robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 68 | SkRect dst = SkRect::MakeXYWH(x, y, this->subset().width(), this->subset().height()); |
| 69 | |
| 70 | canvas->drawImageRect(fImage, this->subset(), |
| 71 | dst, paint, SkCanvas::kStrict_SrcRectConstraint); |
| 72 | } |
| 73 | |
| 74 | bool onPeekPixels(SkPixmap* pixmap) const override { |
| 75 | return fImage->peekPixels(pixmap); |
| 76 | } |
| 77 | |
| 78 | GrTexture* onPeekTexture() const override { return fImage->getTexture(); } |
| 79 | |
| 80 | SkSpecialSurface* onNewSurface(const SkImageInfo& info) const override { |
| 81 | #if SK_SUPPORT_GPU |
| 82 | GrTexture* texture = fImage->getTexture(); |
| 83 | if (texture) { |
| 84 | GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(info); |
| 85 | desc.fFlags = kRenderTarget_GrSurfaceFlag; |
| 86 | |
| 87 | return SkSpecialSurface::NewRenderTarget(texture->getContext(), desc); |
| 88 | } |
| 89 | #endif |
| 90 | return SkSpecialSurface::NewRaster(info, nullptr); |
| 91 | } |
| 92 | |
| 93 | private: |
| 94 | SkAutoTUnref<const SkImage> fImage; |
| 95 | |
| 96 | typedef SkSpecialImage_Base INHERITED; |
| 97 | }; |
| 98 | |
| 99 | #ifdef SK_DEBUG |
| 100 | static bool rect_fits(const SkIRect& rect, int width, int height) { |
| 101 | return rect.fLeft >= 0 && rect.fLeft < width && rect.fLeft < rect.fRight && |
| 102 | rect.fRight >= 0 && rect.fRight <= width && |
| 103 | rect.fTop >= 0 && rect.fTop < height && rect.fTop < rect.fBottom && |
| 104 | rect.fBottom >= 0 && rect.fBottom <= height; |
| 105 | } |
| 106 | #endif |
| 107 | |
| 108 | SkSpecialImage* SkSpecialImage::NewFromImage(const SkIRect& subset, const SkImage* image) { |
| 109 | SkASSERT(rect_fits(subset, image->width(), image->height())); |
| 110 | return new SkSpecialImage_Image(subset, image); |
| 111 | } |
| 112 | |
| 113 | /////////////////////////////////////////////////////////////////////////////// |
| 114 | #include "SkBitmap.h" |
| 115 | #include "SkImageInfo.h" |
| 116 | #include "SkPixelRef.h" |
| 117 | |
| 118 | class SkSpecialImage_Raster : public SkSpecialImage_Base { |
| 119 | public: |
| 120 | SkSpecialImage_Raster(const SkIRect& subset, const SkBitmap& bm) |
| 121 | : INHERITED(subset) |
| 122 | , fBitmap(bm) { |
| 123 | if (bm.pixelRef()->isPreLocked()) { |
| 124 | // we only preemptively lock if there is no chance of triggering something expensive |
| 125 | // like a lazy decode or imagegenerator. PreLocked means it is flat pixels already. |
| 126 | fBitmap.lockPixels(); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | ~SkSpecialImage_Raster() override { } |
| 131 | |
robertphillips | e8c3497 | 2016-02-16 12:09:36 -0800 | [diff] [blame^] | 132 | void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const override { |
robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 133 | SkRect dst = SkRect::MakeXYWH(x, y, |
| 134 | this->subset().width(), this->subset().height()); |
| 135 | |
| 136 | canvas->drawBitmapRect(fBitmap, this->subset(), |
| 137 | dst, paint, SkCanvas::kStrict_SrcRectConstraint); |
| 138 | } |
| 139 | |
| 140 | bool onPeekPixels(SkPixmap* pixmap) const override { |
| 141 | const SkImageInfo info = fBitmap.info(); |
| 142 | if ((kUnknown_SkColorType == info.colorType()) || !fBitmap.getPixels()) { |
| 143 | return false; |
| 144 | } |
| 145 | const void* pixels = fBitmap.getPixels(); |
| 146 | if (pixels) { |
| 147 | if (pixmap) { |
| 148 | pixmap->reset(info, pixels, fBitmap.rowBytes()); |
| 149 | } |
| 150 | return true; |
| 151 | } |
| 152 | return false; |
| 153 | } |
| 154 | |
| 155 | SkSpecialSurface* onNewSurface(const SkImageInfo& info) const override { |
| 156 | return SkSpecialSurface::NewRaster(info, nullptr); |
| 157 | } |
| 158 | |
| 159 | private: |
| 160 | SkBitmap fBitmap; |
| 161 | |
| 162 | typedef SkSpecialImage_Base INHERITED; |
| 163 | }; |
| 164 | |
| 165 | SkSpecialImage* SkSpecialImage::NewFromRaster(const SkIRect& subset, const SkBitmap& bm) { |
| 166 | SkASSERT(nullptr == bm.getTexture()); |
| 167 | SkASSERT(rect_fits(subset, bm.width(), bm.height())); |
| 168 | return new SkSpecialImage_Raster(subset, bm); |
| 169 | } |
| 170 | |
| 171 | #if SK_SUPPORT_GPU |
| 172 | /////////////////////////////////////////////////////////////////////////////// |
| 173 | #include "GrTexture.h" |
| 174 | |
| 175 | class SkSpecialImage_Gpu : public SkSpecialImage_Base { |
| 176 | public: |
| 177 | SkSpecialImage_Gpu(const SkIRect& subset, GrTexture* tex) |
| 178 | : INHERITED(subset) |
| 179 | , fTexture(SkRef(tex)) { |
| 180 | } |
| 181 | |
| 182 | ~SkSpecialImage_Gpu() override { } |
| 183 | |
robertphillips | e8c3497 | 2016-02-16 12:09:36 -0800 | [diff] [blame^] | 184 | void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const override { |
robertphillips | b6c65e9 | 2016-02-04 10:52:42 -0800 | [diff] [blame] | 185 | SkRect dst = SkRect::MakeXYWH(x, y, |
| 186 | this->subset().width(), this->subset().height()); |
| 187 | |
| 188 | SkBitmap bm; |
| 189 | |
| 190 | static const bool kUnknownOpacity = false; |
| 191 | GrWrapTextureInBitmap(fTexture, |
| 192 | fTexture->width(), fTexture->height(), kUnknownOpacity, &bm); |
| 193 | |
| 194 | canvas->drawBitmapRect(bm, this->subset(), |
| 195 | dst, paint, SkCanvas::kStrict_SrcRectConstraint); |
| 196 | } |
| 197 | |
| 198 | GrTexture* onPeekTexture() const override { return fTexture; } |
| 199 | |
| 200 | SkSpecialSurface* onNewSurface(const SkImageInfo& info) const override { |
| 201 | GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(info); |
| 202 | desc.fFlags = kRenderTarget_GrSurfaceFlag; |
| 203 | |
| 204 | return SkSpecialSurface::NewRenderTarget(fTexture->getContext(), desc); |
| 205 | } |
| 206 | |
| 207 | private: |
| 208 | SkAutoTUnref<GrTexture> fTexture; |
| 209 | |
| 210 | typedef SkSpecialImage_Base INHERITED; |
| 211 | }; |
| 212 | |
| 213 | SkSpecialImage* SkSpecialImage::NewFromGpu(const SkIRect& subset, GrTexture* tex) { |
| 214 | SkASSERT(rect_fits(subset, tex->width(), tex->height())); |
| 215 | return new SkSpecialImage_Gpu(subset, tex); |
| 216 | } |
| 217 | |
| 218 | #else |
| 219 | |
| 220 | SkSpecialImage* SkSpecialImage::NewFromGpu(const SkIRect& subset, GrTexture* tex) { |
| 221 | return nullptr; |
| 222 | } |
| 223 | |
| 224 | #endif |