gfx/skia/trunk/src/image/SkImage.cpp@6474c204b198 (annotated)
gfx/skia/trunk/src/image/SkImage.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2012 Google Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | * found in the LICENSE file. |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "SkBitmap.h" |
| michael@0 | 9 | #include "SkCanvas.h" |
| michael@0 | 10 | #include "SkImagePriv.h" |
| michael@0 | 11 | #include "SkImage_Base.h" |
| michael@0 | 12 | |
| michael@0 | 13 | static SkImage_Base* as_IB(SkImage* image) { |
| michael@0 | 14 | return static_cast<SkImage_Base*>(image); |
| michael@0 | 15 | } |
| michael@0 | 16 | |
| michael@0 | 17 | static const SkImage_Base* as_IB(const SkImage* image) { |
| michael@0 | 18 | return static_cast<const SkImage_Base*>(image); |
| michael@0 | 19 | } |
| michael@0 | 20 | |
| michael@0 | 21 | uint32_t SkImage::NextUniqueID() { |
| michael@0 | 22 | static int32_t gUniqueID; |
| michael@0 | 23 | |
| michael@0 | 24 | // never return 0; |
| michael@0 | 25 | uint32_t id; |
| michael@0 | 26 | do { |
| michael@0 | 27 | id = sk_atomic_inc(&gUniqueID) + 1; |
| michael@0 | 28 | } while (0 == id); |
| michael@0 | 29 | return id; |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | void SkImage::draw(SkCanvas* canvas, SkScalar x, SkScalar y, |
| michael@0 | 33 | const SkPaint* paint) { |
| michael@0 | 34 | as_IB(this)->onDraw(canvas, x, y, paint); |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | void SkImage::draw(SkCanvas* canvas, const SkRect* src, const SkRect& dst, |
| michael@0 | 38 | const SkPaint* paint) { |
| michael@0 | 39 | as_IB(this)->onDrawRectToRect(canvas, src, dst, paint); |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | const void* SkImage::peekPixels(SkImageInfo* info, size_t* rowBytes) const { |
| michael@0 | 43 | SkImageInfo infoStorage; |
| michael@0 | 44 | size_t rowBytesStorage; |
| michael@0 | 45 | if (NULL == info) { |
| michael@0 | 46 | info = &infoStorage; |
| michael@0 | 47 | } |
| michael@0 | 48 | if (NULL == rowBytes) { |
| michael@0 | 49 | rowBytes = &rowBytesStorage; |
| michael@0 | 50 | } |
| michael@0 | 51 | return as_IB(this)->onPeekPixels(info, rowBytes); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | bool SkImage::readPixels(SkBitmap* bitmap, const SkIRect* subset) const { |
| michael@0 | 55 | if (NULL == bitmap) { |
| michael@0 | 56 | return false; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | SkIRect bounds = SkIRect::MakeWH(this->width(), this->height()); |
| michael@0 | 60 | |
| michael@0 | 61 | // trim against the bitmap, if its already been allocated |
| michael@0 | 62 | if (bitmap->pixelRef()) { |
| michael@0 | 63 | bounds.fRight = SkMin32(bounds.fRight, bitmap->width()); |
| michael@0 | 64 | bounds.fBottom = SkMin32(bounds.fBottom, bitmap->height()); |
| michael@0 | 65 | if (bounds.isEmpty()) { |
| michael@0 | 66 | return false; |
| michael@0 | 67 | } |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | if (subset && !bounds.intersect(*subset)) { |
| michael@0 | 71 | // perhaps we could return true + empty-bitmap? |
| michael@0 | 72 | return false; |
| michael@0 | 73 | } |
| michael@0 | 74 | return as_IB(this)->onReadPixels(bitmap, bounds); |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | GrTexture* SkImage::getTexture() { |
| michael@0 | 78 | return as_IB(this)->onGetTexture(); |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const { |
| michael@0 | 82 | SkBitmap bm; |
| michael@0 | 83 | if (as_IB(this)->getROPixels(&bm)) { |
| michael@0 | 84 | return SkImageEncoder::EncodeData(bm, type, quality); |
| michael@0 | 85 | } |
| michael@0 | 86 | return NULL; |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | /////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 90 | |
| michael@0 | 91 | static bool raster_canvas_supports(const SkImageInfo& info) { |
| michael@0 | 92 | switch (info.fColorType) { |
| michael@0 | 93 | case kPMColor_SkColorType: |
| michael@0 | 94 | return kUnpremul_SkAlphaType != info.fAlphaType; |
| michael@0 | 95 | case kRGB_565_SkColorType: |
| michael@0 | 96 | return true; |
| michael@0 | 97 | case kAlpha_8_SkColorType: |
| michael@0 | 98 | return true; |
| michael@0 | 99 | default: |
| michael@0 | 100 | break; |
| michael@0 | 101 | } |
| michael@0 | 102 | return false; |
| michael@0 | 103 | } |
| michael@0 | 104 | |
| michael@0 | 105 | bool SkImage_Base::onReadPixels(SkBitmap* bitmap, const SkIRect& subset) const { |
| michael@0 | 106 | SkImageInfo info; |
| michael@0 | 107 | |
| michael@0 | 108 | if (bitmap->pixelRef()) { |
| michael@0 | 109 | if (!bitmap->asImageInfo(&info)) { |
| michael@0 | 110 | return false; |
| michael@0 | 111 | } |
| michael@0 | 112 | if (!raster_canvas_supports(info)) { |
| michael@0 | 113 | return false; |
| michael@0 | 114 | } |
| michael@0 | 115 | } else { |
| michael@0 | 116 | SkImageInfo info = SkImageInfo::MakeN32Premul(subset.width(), |
| michael@0 | 117 | subset.height()); |
| michael@0 | 118 | SkBitmap tmp; |
| michael@0 | 119 | if (!tmp.allocPixels(info)) { |
| michael@0 | 120 | return false; |
| michael@0 | 121 | } |
| michael@0 | 122 | *bitmap = tmp; |
| michael@0 | 123 | } |
| michael@0 | 124 | |
| michael@0 | 125 | SkRect srcR, dstR; |
| michael@0 | 126 | srcR.set(subset); |
| michael@0 | 127 | dstR = srcR; |
| michael@0 | 128 | dstR.offset(-dstR.left(), -dstR.top()); |
| michael@0 | 129 | |
| michael@0 | 130 | SkCanvas canvas(*bitmap); |
| michael@0 | 131 | |
| michael@0 | 132 | SkPaint paint; |
| michael@0 | 133 | paint.setXfermodeMode(SkXfermode::kClear_Mode); |
| michael@0 | 134 | canvas.drawRect(dstR, paint); |
| michael@0 | 135 | |
| michael@0 | 136 | const_cast<SkImage_Base*>(this)->onDrawRectToRect(&canvas, &srcR, dstR, NULL); |
| michael@0 | 137 | return true; |
| michael@0 | 138 | } |
