1/*
2 * Copyright (C) 2006 Dirk Mueller <mueller@kde.org>
3 * Copyright (C) 2006 Zack Rusin <zack@kde.org>
4 * Copyright (C) 2006 Simon Hausmann <hausmann@kde.org>
5 * Copyright (C) 2007 Ryan Leavengood <leavengood@gmail.com>
6 * Copyright (C) 2008 Andrea Anzani <andrea.anzani@gmail.com>
7 * Copyright (C) 2010 Stephan AÃmus <superstippi@gmx.de>
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
28 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "config.h"
34#include "Image.h"
35
36#include "BitmapImage.h"
37#include "FloatRect.h"
38#include "GraphicsContext.h"
39#include "ImageObserver.h"
40#include "NotImplemented.h"
41#include "PlatformString.h"
42#include "TransformationMatrix.h"
43#include <Application.h>
44#include <Bitmap.h>
45#include <View.h>
46
47// This function loads resources from WebKit
48Vector<char> loadResourceIntoArray(const char*);
49
50
51namespace WebCore {
52
53bool FrameData::clear(bool clearMetadata)
54{
55    if (clearMetadata)
56        m_haveMetadata = false;
57
58    if (m_frame) {
59        delete m_frame;
60        m_frame = 0;
61        m_duration = 0.0f;
62        m_hasAlpha = true;
63        return true;
64    }
65
66    return false;
67}
68
69WTF::PassRefPtr<Image> Image::loadPlatformResource(const char* name)
70{
71    Vector<char> array = loadResourceIntoArray(name);
72    WTF::PassRefPtr<BitmapImage> image = BitmapImage::create();
73    RefPtr<SharedBuffer> buffer = SharedBuffer::create(array.data(), array.size());
74    image->setData(buffer, true);
75
76    return image;
77}
78
79void BitmapImage::initPlatformData()
80{
81}
82
83void BitmapImage::invalidatePlatformData()
84{
85}
86
87// Drawing Routines
88void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& dst, const FloatRect& src, ColorSpace styleColorSpace, CompositeOperator op)
89{
90    if (!m_source.initialized())
91        return;
92
93    // Spin the animation to the correct frame before we try to draw it, so we
94    // don't draw an old frame and then immediately need to draw a newer one,
95    // causing flicker and wasting CPU.
96    startAnimation();
97
98    BBitmap* image = nativeImageForCurrentFrame();
99    if (!image || !image->IsValid()) // If the image hasn't fully loaded.
100        return;
101
102    if (mayFillWithSolidColor()) {
103        fillWithSolidColor(ctxt, dst, solidColor(), styleColorSpace, op);
104        return;
105    }
106
107    ctxt->save();
108    ctxt->setCompositeOperation(op);
109
110    BRect srcRect(src);
111    BRect dstRect(dst);
112
113    // Test using example site at
114    // http://www.meyerweb.com/eric/css/edge/complexspiral/demo.html
115    ctxt->platformContext()->SetDrawingMode(B_OP_ALPHA);
116    ctxt->platformContext()->DrawBitmapAsync(image, srcRect, dstRect);
117    ctxt->restore();
118
119    if (imageObserver())
120        imageObserver()->didDraw(this);
121}
122
123void Image::drawPattern(GraphicsContext* context, const FloatRect& tileRect, const AffineTransform& patternTransform, const FloatPoint& srcPoint, ColorSpace, CompositeOperator op, const FloatRect& dstRect)
124{
125    BBitmap* image = nativeImageForCurrentFrame();
126    if (!image || !image->IsValid()) // If the image hasn't fully loaded.
127        return;
128
129    // Figure out if the image has any alpha transparency, we can use faster drawing if not
130    bool hasAlpha = false;
131
132    uint8* bits = reinterpret_cast<uint8*>(image->Bits());
133    uint32 width = image->Bounds().IntegerWidth() + 1;
134    uint32 height = image->Bounds().IntegerHeight() + 1;
135
136    uint32 bytesPerRow = image->BytesPerRow();
137    for (uint32 y = 0; y < height && !hasAlpha; y++) {
138        uint8* p = bits;
139        for (uint32 x = 0; x < width && !hasAlpha; x++) {
140            hasAlpha = p[3] < 255;
141            p += 4;
142        }
143        bits += bytesPerRow;
144    }
145
146    context->save();
147    if (hasAlpha)
148        context->platformContext()->SetDrawingMode(B_OP_ALPHA);
149    else
150        context->platformContext()->SetDrawingMode(B_OP_COPY);
151    context->clip(enclosingIntRect(dstRect));
152    float currentW = phase.x();
153    BRect bTileRect(tileRect);
154    while (currentW < dstRect.x() + dstRect.width()) {
155        float currentH = phase.y();
156        while (currentH < dstRect.y() + dstRect.height()) {
157            BRect bDstRect(currentW, currentH, currentW + width - 1, currentH + height - 1);
158            context->platformContext()->DrawBitmapAsync(image, bTileRect, bDstRect);
159            currentH += height;
160        }
161        currentW += width;
162    }
163    context->restore();
164
165    if (imageObserver())
166        imageObserver()->didDraw(this);
167}
168
169void BitmapImage::checkForSolidColor()
170{
171    m_isSolidColor = false;
172    m_checkedForSolidColor = true;
173
174    if (frameCount() > 1)
175        return;
176
177    BBitmap* image = getBBitmap();
178    if (!image || !image->Bounds().IsValid()
179        || image->Bounds().IntegerWidth() > 0 || image->Bounds().IntegerHeight() > 0) {
180        return;
181    }
182
183    m_isSolidColor = true;
184    uint8* bits = reinterpret_cast<uint8*>(image->Bits());
185    m_solidColor = Color(bits[2], bits[1], bits[0], bits[3]);
186}
187
188BBitmap* BitmapImage::getBBitmap() const
189{
190    return const_cast<BitmapImage*>(this)->frameAtIndex(0);
191}
192
193} // namespace WebCore
194
195