The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/effects/SkBitmapSource.cpp
gfx/skia/trunk/src/effects/SkBitmapSource.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:6031f38de6d9 |
|---|---|
| 1 /* | |
| 2 * Copyright 2012 The Android Open Source Project | |
| 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 "SkBitmapSource.h" | |
| 9 #include "SkDevice.h" | |
| 10 #include "SkCanvas.h" | |
| 11 #include "SkReadBuffer.h" | |
| 12 #include "SkWriteBuffer.h" | |
| 13 #include "SkValidationUtils.h" | |
| 14 | |
| 15 SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap) | |
| 16 : INHERITED(0, 0), | |
| 17 fBitmap(bitmap), | |
| 18 fSrcRect(SkRect::MakeWH(SkIntToScalar(bitmap.width()), | |
| 19 SkIntToScalar(bitmap.height()))), | |
| 20 fDstRect(fSrcRect) { | |
| 21 } | |
| 22 | |
| 23 SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap, const SkRect& srcRect, const SkRect& dstRect) | |
| 24 : INHERITED(0, 0), | |
| 25 fBitmap(bitmap), | |
| 26 fSrcRect(srcRect), | |
| 27 fDstRect(dstRect) { | |
| 28 } | |
| 29 | |
| 30 SkBitmapSource::SkBitmapSource(SkReadBuffer& buffer) | |
| 31 : INHERITED(0, buffer) { | |
| 32 fBitmap.unflatten(buffer); | |
| 33 buffer.readRect(&fSrcRect); | |
| 34 buffer.readRect(&fDstRect); | |
| 35 buffer.validate(buffer.isValid() && SkIsValidRect(fSrcRect) && SkIsValidRect(fDstRect)); | |
| 36 } | |
| 37 | |
| 38 void SkBitmapSource::flatten(SkWriteBuffer& buffer) const { | |
| 39 this->INHERITED::flatten(buffer); | |
| 40 fBitmap.flatten(buffer); | |
| 41 buffer.writeRect(fSrcRect); | |
| 42 buffer.writeRect(fDstRect); | |
| 43 } | |
| 44 | |
| 45 bool SkBitmapSource::onFilterImage(Proxy* proxy, const SkBitmap&, const Context& ctx, | |
| 46 SkBitmap* result, SkIPoint* offset) const { | |
| 47 SkRect bounds, dstRect; | |
| 48 fBitmap.getBounds(&bounds); | |
| 49 ctx.ctm().mapRect(&dstRect, fDstRect); | |
| 50 if (fSrcRect == bounds && dstRect == bounds) { | |
| 51 // No regions cropped out or resized; return entire bitmap. | |
| 52 *result = fBitmap; | |
| 53 offset->fX = offset->fY = 0; | |
| 54 return true; | |
| 55 } | |
| 56 SkIRect dstIRect; | |
| 57 dstRect.roundOut(&dstIRect); | |
| 58 | |
| 59 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstIRect.width(), dstIRect.height())); | |
| 60 if (NULL == device.get()) { | |
| 61 return false; | |
| 62 } | |
| 63 | |
| 64 SkCanvas canvas(device.get()); | |
| 65 SkPaint paint; | |
| 66 | |
| 67 // Subtract off the integer component of the translation (will be applied in loc, below). | |
| 68 dstRect.offset(-SkIntToScalar(dstIRect.fLeft), -SkIntToScalar(dstIRect.fTop)); | |
| 69 paint.setXfermodeMode(SkXfermode::kSrc_Mode); | |
| 70 // FIXME: this probably shouldn't be necessary, but drawBitmapRectToRect asserts | |
| 71 // None filtering when it's translate-only | |
| 72 paint.setFilterLevel( | |
| 73 fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ? | |
| 74 SkPaint::kNone_FilterLevel : SkPaint::kHigh_FilterLevel); | |
| 75 canvas.drawBitmapRectToRect(fBitmap, &fSrcRect, dstRect, &paint); | |
| 76 | |
| 77 *result = device.get()->accessBitmap(false); | |
| 78 offset->fX = dstIRect.fLeft; | |
| 79 offset->fY = dstIRect.fTop; | |
| 80 return true; | |
| 81 } | |
| 82 | |
| 83 void SkBitmapSource::computeFastBounds(const SkRect&, SkRect* dst) const { | |
| 84 *dst = fDstRect; | |
| 85 } | |
| 86 | |
| 87 bool SkBitmapSource::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, | |
| 88 SkIRect* dst) const { | |
| 89 *dst = src; | |
| 90 return true; | |
| 91 } |
