1 /*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #include "PlatformCanvas.h"
29
30 #include "GraphicsContext.h"
31
32 #if USE(SKIA)
33 #include "NativeImageSkia.h"
34 #include "PlatformContextSkia.h"
35 #include "SkColorPriv.h"
36 #include "skia/ext/platform_canvas.h"
37 #elif USE(CG)
38 #include <CoreGraphics/CGBitmapContext.h>
39 #endif
40
41 namespace WebCore {
42
PlatformCanvas()43 PlatformCanvas::PlatformCanvas()
44 {
45 }
46
~PlatformCanvas()47 PlatformCanvas::~PlatformCanvas()
48 {
49 }
50
resize(const IntSize & size)51 void PlatformCanvas::resize(const IntSize& size)
52 {
53 m_size = size;
54 #if USE(SKIA)
55 m_skiaCanvas = skia::CreateBitmapCanvas(size.width(), size.height(), false);
56 #elif USE(CG)
57 size_t bufferSize = size.width() * size.height() * 4;
58 m_pixelData = adoptArrayPtr(new uint8_t[bufferSize]);
59 memset(m_pixelData.get(), 0, bufferSize);
60 #endif
61 }
62
AutoLocker(PlatformCanvas * canvas)63 PlatformCanvas::AutoLocker::AutoLocker(PlatformCanvas* canvas)
64 : m_canvas(canvas)
65 , m_pixels(0)
66 {
67 #if USE(SKIA)
68 if (m_canvas->m_skiaCanvas) {
69 m_bitmap = &m_canvas->m_skiaCanvas->getDevice()->accessBitmap(false);
70 m_bitmap->lockPixels();
71
72 if (m_bitmap->config() == SkBitmap::kARGB_8888_Config)
73 m_pixels = static_cast<uint8_t*>(m_bitmap->getPixels());
74 } else
75 m_bitmap = 0;
76 #elif USE(CG)
77 if (canvas->m_pixelData)
78 m_pixels = &canvas->m_pixelData[0];
79 #endif
80 }
81
~AutoLocker()82 PlatformCanvas::AutoLocker::~AutoLocker()
83 {
84 #if USE(SKIA)
85 if (m_bitmap)
86 m_bitmap->unlockPixels();
87 #endif
88 }
89
Painter(PlatformCanvas * canvas,PlatformCanvas::Painter::TextOption option)90 PlatformCanvas::Painter::Painter(PlatformCanvas* canvas, PlatformCanvas::Painter::TextOption option)
91 {
92 #if USE(SKIA)
93 m_skiaContext = adoptPtr(new PlatformContextSkia(canvas->m_skiaCanvas.get()));
94
95 m_skiaContext->setDrawingToImageBuffer(option == GrayscaleText);
96
97 m_context = adoptPtr(new GraphicsContext(reinterpret_cast<PlatformGraphicsContext*>(m_skiaContext.get())));
98 #elif USE(CG)
99
100 m_colorSpace = CGColorSpaceCreateDeviceRGB();
101 size_t rowBytes = canvas->size().width() * 4;
102 m_contextCG = CGBitmapContextCreate(canvas->m_pixelData.get(),
103 canvas->size().width(), canvas->size().height(), 8, rowBytes,
104 m_colorSpace.get(),
105 kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
106 CGContextTranslateCTM(m_contextCG.get(), 0, canvas->size().height());
107 CGContextScaleCTM(m_contextCG.get(), 1, -1);
108 m_context = adoptPtr(new GraphicsContext(m_contextCG.get()));
109 #endif
110 }
111
~Painter()112 PlatformCanvas::Painter::~Painter()
113 {
114 }
115
116 } // namespace WebCore
117