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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "base/basictypes.h" | |
6 #include "base/compiler_specific.h" | |
7 #include "ui/gfx/canvas.h" | |
8 #include "ui/gfx/canvas_skia_paint.h" | |
9 #include "ui/gfx/rect.h" | |
10 | |
11 namespace gfx { | |
12 | |
13 CanvasSkiaPaint::CanvasSkiaPaint(HWND hwnd, HDC dc, const PAINTSTRUCT& ps) | |
14 : hwnd_(hwnd), | |
15 paint_dc_(dc) { | |
16 memset(&ps_, 0, sizeof(ps_)); | |
17 ps_.rcPaint.left = ps.rcPaint.left; | |
18 ps_.rcPaint.right = ps.rcPaint.right; | |
19 ps_.rcPaint.top = ps.rcPaint.top; | |
20 ps_.rcPaint.bottom = ps.rcPaint.bottom; | |
21 Init(true); | |
22 } | |
23 | |
24 CanvasSkiaPaint::CanvasSkiaPaint(HDC dc, bool opaque, int x, int y, | |
25 int w, int h) | |
26 : hwnd_(NULL), | |
27 paint_dc_(dc) { | |
28 memset(&ps_, 0, sizeof(ps_)); | |
29 ps_.rcPaint.left = x; | |
30 ps_.rcPaint.right = x + w; | |
31 ps_.rcPaint.top = y; | |
32 ps_.rcPaint.bottom = y + h; | |
33 Init(opaque); | |
34 } | |
35 | |
36 CanvasSkiaPaint::~CanvasSkiaPaint() { | |
37 if (!is_empty()) { | |
38 skia::PlatformCanvas* canvas = platform_canvas(); | |
39 canvas->restoreToCount(1); | |
40 // Commit the drawing to the screen | |
41 skia::DrawToNativeContext(canvas, paint_dc_, ps_.rcPaint.left, | |
42 ps_.rcPaint.top, NULL); | |
43 } | |
44 } | |
45 | |
46 gfx::Rect CanvasSkiaPaint::GetInvalidRect() const { | |
47 return gfx::Rect(paint_struct().rcPaint); | |
48 } | |
49 | |
50 void CanvasSkiaPaint::Init(bool opaque) { | |
51 // FIXME(brettw) for ClearType, we probably want to expand the bounds of | |
52 // painting by one pixel so that the boundaries will be correct (ClearType | |
53 // text can depend on the adjacent pixel). Then we would paint just the | |
54 // inset pixels to the screen. | |
55 const int width = ps_.rcPaint.right - ps_.rcPaint.left; | |
56 const int height = ps_.rcPaint.bottom - ps_.rcPaint.top; | |
57 | |
58 RecreateBackingCanvas(gfx::Size(width, height), | |
59 gfx::win::GetDeviceScaleFactor(), | |
60 opaque); | |
61 skia::PlatformCanvas* canvas = platform_canvas(); | |
62 | |
63 canvas->clear(SkColorSetARGB(0, 0, 0, 0)); | |
64 | |
65 // This will bring the canvas into the screen coordinate system for the | |
66 // dirty rect | |
67 canvas->translate( | |
68 -ps_.rcPaint.left / gfx::win::GetDeviceScaleFactor(), | |
69 -ps_.rcPaint.top / gfx::win::GetDeviceScaleFactor()); | |
70 } | |
71 | |
72 } // namespace gfx | |
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