1/*
2 * Copyright (C) 2008 Apple 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 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "Image.h"
28#include "BitmapImage.h"
29#include "GraphicsContext.h"
30#include <cairo.h>
31#include <cairo-win32.h>
32
33#include <windows.h>
34#include "PlatformString.h"
35
36namespace WebCore {
37
38PassRefPtr<BitmapImage> BitmapImage::create(HBITMAP hBitmap)
39{
40    DIBSECTION dibSection;
41    if (!GetObject(hBitmap, sizeof(DIBSECTION), &dibSection))
42        return 0;
43
44    ASSERT(dibSection.dsBm.bmBitsPixel == 32);
45    if (dibSection.dsBm.bmBitsPixel != 32)
46        return 0;
47
48    ASSERT(dibSection.dsBm.bmBits);
49    if (!dibSection.dsBm.bmBits)
50        return 0;
51
52    cairo_surface_t* image = cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32, dibSection.dsBm.bmWidth, dibSection.dsBm.bmHeight);
53
54    // The BitmapImage object takes over ownership of the cairo_surface_t*, so no need to destroy here.
55    return adoptRef(new BitmapImage(image));
56}
57
58bool BitmapImage::getHBITMAPOfSize(HBITMAP bmp, LPSIZE size)
59{
60    ASSERT(bmp);
61
62    BITMAP bmpInfo;
63    GetObject(bmp, sizeof(BITMAP), &bmpInfo);
64
65    // If this is a 32bpp bitmap, which it always should be, we'll clear it so alpha-wise it will be visible
66    if (bmpInfo.bmBitsPixel == 32) {
67        int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
68        memset(bmpInfo.bmBits, 255, bufferSize);
69    }
70
71    cairo_surface_t* image = cairo_image_surface_create_for_data((unsigned char*)bmpInfo.bmBits,
72                                               CAIRO_FORMAT_ARGB32,
73                                               bmpInfo.bmWidth,
74                                               bmpInfo.bmHeight,
75                                               bmpInfo.bmWidthBytes);
76
77
78    cairo_t* targetRef = cairo_create(image);
79    cairo_surface_destroy(image);
80
81    GraphicsContext gc(targetRef);
82
83    IntSize imageSize = BitmapImage::size();
84    if (size)
85        drawFrameMatchingSourceSize(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), IntSize(*size), ColorSpaceDeviceRGB, CompositeCopy);
86    else
87        draw(&gc, FloatRect(0.0f, 0.0f, bmpInfo.bmWidth, bmpInfo.bmHeight), FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), ColorSpaceDeviceRGB, CompositeCopy);
88
89    // Do cleanup
90    cairo_destroy(targetRef);
91
92    return true;
93}
94
95void BitmapImage::drawFrameMatchingSourceSize(GraphicsContext* ctxt, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator compositeOp)
96{
97    size_t frames = frameCount();
98    for (size_t i = 0; i < frames; ++i) {
99        cairo_surface_t* image = frameAtIndex(i);
100        if (cairo_image_surface_get_height(image) == static_cast<size_t>(srcSize.height()) && cairo_image_surface_get_width(image) == static_cast<size_t>(srcSize.width())) {
101            size_t currentFrame = m_currentFrame;
102            m_currentFrame = i;
103            draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, srcSize.width(), srcSize.height()), ColorSpaceDeviceRGB, compositeOp);
104            m_currentFrame = currentFrame;
105            return;
106        }
107    }
108
109    // No image of the correct size was found, fallback to drawing the current frame
110    IntSize imageSize = BitmapImage::size();
111    draw(ctxt, dstRect, FloatRect(0.0f, 0.0f, imageSize.width(), imageSize.height()), ColorSpaceDeviceRGB, compositeOp);
112}
113
114} // namespace WebCore
115