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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ui/gfx/canvas.h" | 5 #include "ui/gfx/canvas.h" |
6 | 6 |
7 #include <cmath> | 7 #include <cmath> |
8 #include <limits> | 8 #include <limits> |
9 | 9 |
10 #include "base/i18n/rtl.h" | 10 #include "base/i18n/rtl.h" |
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24 #include "ui/gfx/geometry/size_conversions.h" | 24 #include "ui/gfx/geometry/size_conversions.h" |
25 #include "ui/gfx/scoped_canvas.h" | 25 #include "ui/gfx/scoped_canvas.h" |
26 #include "ui/gfx/skia_paint_util.h" | 26 #include "ui/gfx/skia_paint_util.h" |
27 #include "ui/gfx/skia_util.h" | 27 #include "ui/gfx/skia_util.h" |
28 #include "ui/gfx/transform.h" | 28 #include "ui/gfx/transform.h" |
29 | 29 |
30 namespace gfx { | 30 namespace gfx { |
31 | 31 |
32 namespace { | 32 namespace { |
33 | 33 |
34 sk_sp<cc::PaintSurface> CreateSurface(const Size& size, bool is_opaque) { | 34 SkBitmap CreateBitmap(const Size& size, bool is_opaque) { |
35 // SkSurface cannot be zero-sized, but clients of Canvas sometimes request | 35 // SkSurface cannot be zero-sized, but clients of Canvas sometimes request |
36 // that (and then later resize). | 36 // that (and then later resize). |
37 int width = std::max(size.width(), 1); | 37 int width = std::max(size.width(), 1); |
38 int height = std::max(size.height(), 1); | 38 int height = std::max(size.height(), 1); |
39 SkAlphaType alpha = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType; | 39 SkAlphaType alpha = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType; |
40 SkImageInfo info = SkImageInfo::MakeN32(width, height, alpha); | 40 SkImageInfo info = SkImageInfo::MakeN32(width, height, alpha); |
41 return cc::PaintSurface::MakeRaster(info); | 41 SkBitmap bitmap; |
42 bool success = bitmap.tryAllocPixels(info); | |
danakj
2017/03/21 20:02:56
why not allocPixels? We should crash on OOM
vmpstr
2017/03/21 22:34:53
Done.
| |
43 DCHECK(success); | |
44 return bitmap; | |
42 } | 45 } |
43 | 46 |
44 } // namespace | 47 } // namespace |
45 | 48 |
46 Canvas::Canvas(const Size& size, float image_scale, bool is_opaque) | 49 Canvas::Canvas(const Size& size, float image_scale, bool is_opaque) |
47 : image_scale_(image_scale) { | 50 : image_scale_(image_scale) { |
48 Size pixel_size = ScaleToCeiledSize(size, image_scale); | 51 Size pixel_size = ScaleToCeiledSize(size, image_scale); |
49 surface_ = CreateSurface(pixel_size, is_opaque); | 52 canvas_ = CreateOwnedCanvas(pixel_size, is_opaque); |
50 canvas_ = surface_->getCanvas(); | |
51 | 53 |
52 #if !defined(USE_CAIRO) | 54 #if !defined(USE_CAIRO) |
53 // skia::PlatformCanvas instances are initialized to 0 by Cairo, but | 55 // skia::PlatformCanvas instances are initialized to 0 by Cairo, but |
54 // uninitialized on other platforms. | 56 // uninitialized on other platforms. |
55 if (!is_opaque) | 57 if (!is_opaque) |
56 canvas_->clear(SkColorSetARGB(0, 0, 0, 0)); | 58 canvas_->clear(SkColorSetARGB(0, 0, 0, 0)); |
57 #endif | 59 #endif |
58 | 60 |
59 SkScalar scale_scalar = SkFloatToScalar(image_scale); | 61 SkScalar scale_scalar = SkFloatToScalar(image_scale); |
60 canvas_->scale(scale_scalar, scale_scalar); | 62 canvas_->scale(scale_scalar, scale_scalar); |
61 } | 63 } |
62 | 64 |
63 Canvas::Canvas() | 65 Canvas::Canvas() |
64 : image_scale_(1.f), | 66 : image_scale_(1.f), canvas_(CreateOwnedCanvas({0, 0}, false)) {} |
65 surface_(CreateSurface({0, 0}, false)), | |
66 canvas_(surface_->getCanvas()) {} | |
67 | 67 |
68 Canvas::Canvas(cc::PaintCanvas* canvas, float image_scale) | 68 Canvas::Canvas(cc::PaintCanvas* canvas, float image_scale) |
69 : image_scale_(image_scale), canvas_(canvas) { | 69 : image_scale_(image_scale), canvas_(canvas) { |
70 DCHECK(canvas_); | 70 DCHECK(canvas_); |
71 } | 71 } |
72 | 72 |
73 Canvas::~Canvas() { | 73 Canvas::~Canvas() { |
74 } | 74 } |
75 | 75 |
76 void Canvas::RecreateBackingCanvas(const Size& size, | 76 void Canvas::RecreateBackingCanvas(const Size& size, |
77 float image_scale, | 77 float image_scale, |
78 bool is_opaque) { | 78 bool is_opaque) { |
79 image_scale_ = image_scale; | 79 image_scale_ = image_scale; |
80 Size pixel_size = ScaleToFlooredSize(size, image_scale); | 80 Size pixel_size = ScaleToFlooredSize(size, image_scale); |
81 surface_ = CreateSurface(pixel_size, is_opaque); | 81 canvas_ = CreateOwnedCanvas(pixel_size, is_opaque); |
82 canvas_ = surface_->getCanvas(); | |
83 | 82 |
84 SkScalar scale_scalar = SkFloatToScalar(image_scale); | 83 SkScalar scale_scalar = SkFloatToScalar(image_scale); |
85 canvas_->scale(scale_scalar, scale_scalar); | 84 canvas_->scale(scale_scalar, scale_scalar); |
86 } | 85 } |
87 | 86 |
88 // static | 87 // static |
89 void Canvas::SizeStringInt(const base::string16& text, | 88 void Canvas::SizeStringInt(const base::string16& text, |
90 const FontList& font_list, | 89 const FontList& font_list, |
91 int* width, | 90 int* width, |
92 int* height, | 91 int* height, |
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552 shader_scale)); | 551 shader_scale)); |
553 flags->setBlendMode(SkBlendMode::kSrcOver); | 552 flags->setBlendMode(SkBlendMode::kSrcOver); |
554 return true; | 553 return true; |
555 } | 554 } |
556 | 555 |
557 void Canvas::Transform(const gfx::Transform& transform) { | 556 void Canvas::Transform(const gfx::Transform& transform) { |
558 canvas_->concat(transform.matrix()); | 557 canvas_->concat(transform.matrix()); |
559 } | 558 } |
560 | 559 |
561 SkBitmap Canvas::ToBitmap() { | 560 SkBitmap Canvas::ToBitmap() { |
562 SkBitmap bitmap; | 561 DCHECK(bitmap_); |
563 bitmap.setInfo(canvas_->imageInfo()); | 562 return *bitmap_; |
564 canvas_->readPixels(&bitmap, 0, 0); | |
565 return bitmap; | |
566 } | 563 } |
567 | 564 |
568 bool Canvas::IntersectsClipRect(const SkRect& rect) { | 565 bool Canvas::IntersectsClipRect(const SkRect& rect) { |
569 SkRect clip; | 566 SkRect clip; |
570 return canvas_->getLocalClipBounds(&clip) && clip.intersects(rect); | 567 return canvas_->getLocalClipBounds(&clip) && clip.intersects(rect); |
571 } | 568 } |
572 | 569 |
573 void Canvas::DrawImageIntHelper(const ImageSkiaRep& image_rep, | 570 void Canvas::DrawImageIntHelper(const ImageSkiaRep& image_rep, |
574 int src_x, | 571 int src_x, |
575 int src_y, | 572 int src_y, |
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612 cc::PaintFlags flags(original_flags); | 609 cc::PaintFlags flags(original_flags); |
613 flags.setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality); | 610 flags.setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality); |
614 flags.setShader(CreateImageRepShaderForScale( | 611 flags.setShader(CreateImageRepShaderForScale( |
615 image_rep, SkShader::kRepeat_TileMode, shader_scale, | 612 image_rep, SkShader::kRepeat_TileMode, shader_scale, |
616 remove_image_scale ? image_rep.scale() : 1.f)); | 613 remove_image_scale ? image_rep.scale() : 1.f)); |
617 | 614 |
618 // The rect will be filled by the bitmap. | 615 // The rect will be filled by the bitmap. |
619 canvas_->drawRect(dest_rect, flags); | 616 canvas_->drawRect(dest_rect, flags); |
620 } | 617 } |
621 | 618 |
619 cc::PaintCanvas* Canvas::CreateOwnedCanvas(const Size& size, bool is_opaque) { | |
620 bitmap_ = CreateBitmap(size, is_opaque); | |
danakj
2017/03/21 20:02:56
This is the only caller of CreateBitmap, inline it
vmpstr
2017/03/21 22:34:53
Done.
| |
621 owned_canvas_ = cc::SkiaPaintCanvas(bitmap_.value()); | |
622 return &owned_canvas_.value(); | |
623 } | |
624 | |
622 } // namespace gfx | 625 } // namespace gfx |
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