1// Copyright (c) 2011 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 "skia/ext/platform_canvas.h"
6
7#include "skia/ext/bitmap_platform_device.h"
8#include "third_party/skia/include/core/SkTypes.h"
9
10namespace skia {
11
12SkBaseDevice* GetTopDevice(const SkCanvas& canvas) {
13  return canvas.getTopDevice(true);
14}
15
16bool SupportsPlatformPaint(const SkCanvas* canvas) {
17  PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
18  return platform_device && platform_device->SupportsPlatformPaint();
19}
20
21PlatformSurface BeginPlatformPaint(SkCanvas* canvas) {
22  PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
23  if (platform_device)
24    return platform_device->BeginPlatformPaint();
25
26  return 0;
27}
28
29void EndPlatformPaint(SkCanvas* canvas) {
30  PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
31  if (platform_device)
32    platform_device->EndPlatformPaint();
33}
34
35void DrawToNativeContext(SkCanvas* canvas, PlatformSurface context, int x,
36                         int y, const PlatformRect* src_rect) {
37  PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas));
38  if (platform_device)
39    platform_device->DrawToNativeContext(context, x, y, src_rect);
40}
41
42void MakeOpaque(SkCanvas* canvas, int x, int y, int width, int height) {
43  if (width <= 0 || height <= 0)
44    return;
45
46  SkRect rect;
47  rect.setXYWH(SkIntToScalar(x), SkIntToScalar(y),
48               SkIntToScalar(width), SkIntToScalar(height));
49  SkPaint paint;
50  paint.setColor(SK_ColorBLACK);
51  paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
52  canvas->drawRect(rect, paint);
53}
54
55size_t PlatformCanvasStrideForWidth(unsigned width) {
56  return 4 * width;
57}
58
59SkCanvas* CreateCanvas(const skia::RefPtr<SkBaseDevice>& device, OnFailureType failureType) {
60  if (!device) {
61    if (CRASH_ON_FAILURE == failureType)
62      SK_CRASH();
63    return NULL;
64  }
65  return new SkCanvas(device.get());
66}
67
68PlatformBitmap::PlatformBitmap() : surface_(0), platform_extra_(0) {}
69
70}  // namespace skia
71