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 "SharedBuffer.h"
43#include "TransformationMatrix.h"
44#include <Application.h>
45#include <Bitmap.h>
46#include <View.h>
47
48// This function loads resources from WebKit
49Vector<char> loadResourceIntoArray(const char*);
50
51
52namespace WebCore {
53
54bool FrameData::clear(bool clearMetadata)
55{
56    if (clearMetadata)
57        m_haveMetadata = false;
58
59    if (m_frame) {
60        delete m_frame;
61        m_frame = 0;
62        m_duration = 0.0f;
63        m_hasAlpha = true;
64        return true;
65    }
66
67    return false;
68}
69
70WTF::PassRefPtr<Image> Image::loadPlatformResource(const char* name)
71{
72    Vector<char> array = loadResourceIntoArray(name);
73    WTF::PassRefPtr<BitmapImage> image = BitmapImage::create();
74    RefPtr<SharedBuffer> buffer = SharedBuffer::create(array.data(), array.size());
75    image->setData(buffer, true);
76
77    return image;
78}
79
80void BitmapImage::initPlatformData()
81{
82}
83
84void BitmapImage::invalidatePlatformData()
85{
86}
87
88// Drawing Routines
89void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& dst, const FloatRect& src, ColorSpace styleColorSpace, CompositeOperator op)
90{
91    if (!m_source.initialized())
92        return;
93
94    // Spin the animation to the correct frame before we try to draw it, so we
95    // don't draw an old frame and then immediately need to draw a newer one,
96    // causing flicker and wasting CPU.
97    startAnimation();
98
99    BBitmap* image = nativeImageForCurrentFrame();
100    if (!image || !image->IsValid()) // If the image hasn't fully loaded.
101        return;
102
103    if (mayFillWithSolidColor()) {
104        fillWithSolidColor(ctxt, dst, solidColor(), styleColorSpace, op);
105        return;
106    }
107
108    ctxt->save();
109    ctxt->setCompositeOperation(op);
110
111    BRect srcRect(src);
112    BRect dstRect(dst);
113
114    // Test using example site at
115    // http://www.meyerweb.com/eric/css/edge/complexspiral/demo.html
116    ctxt->platformContext()->SetDrawingMode(B_OP_ALPHA);
117    ctxt->platformContext()->DrawBitmapAsync(image, srcRect, dstRect);
118    ctxt->restore();
119
120    if (imageObserver())
121        imageObserver()->didDraw(this);
122}
123
124void Image::drawPattern(GraphicsContext* context, const FloatRect& tileRect, const AffineTransform& patternTransform, const FloatPoint& phase, ColorSpace, CompositeOperator op, const FloatRect& dstRect)
125{
126    BBitmap* image = nativeImageForCurrentFrame();
127    if (!image || !image->IsValid()) // If the image hasn't fully loaded.
128        return;
129
130    // Figure out if the image has any alpha transparency, we can use faster drawing if not
131    bool hasAlpha = false;
132
133    uint8* bits = reinterpret_cast<uint8*>(image->Bits());
134    uint32 width = image->Bounds().IntegerWidth() + 1;
135    uint32 height = image->Bounds().IntegerHeight() + 1;
136
137    uint32 bytesPerRow = image->BytesPerRow();
138    for (uint32 y = 0; y < height && !hasAlpha; y++) {
139        uint8* p = bits;
140        for (uint32 x = 0; x < width && !hasAlpha; x++) {
141            hasAlpha = p[3] < 255;
142            p += 4;
143        }
144        bits += bytesPerRow;
145    }
146
147    context->save();
148    if (hasAlpha)
149        context->platformContext()->SetDrawingMode(B_OP_ALPHA);
150    else
151        context->platformContext()->SetDrawingMode(B_OP_COPY);
152    context->clip(enclosingIntRect(dstRect));
153    float currentW = phase.x();
154    BRect bTileRect(tileRect);
155    while (currentW < dstRect.x() + dstRect.width()) {
156        float currentH = phase.y();
157        while (currentH < dstRect.y() + dstRect.height()) {
158            BRect bDstRect(currentW, currentH, currentW + width - 1, currentH + height - 1);
159            context->platformContext()->DrawBitmapAsync(image, bTileRect, bDstRect);
160            currentH += height;
161        }
162        currentW += width;
163    }
164    context->restore();
165
166    if (imageObserver())
167        imageObserver()->didDraw(this);
168}
169
170void BitmapImage::checkForSolidColor()
171{
172    m_isSolidColor = false;
173    m_checkedForSolidColor = true;
174
175    if (frameCount() > 1)
176        return;
177
178    BBitmap* image = getBBitmap();
179    if (!image || !image->Bounds().IsValid()
180        || image->Bounds().IntegerWidth() > 0 || image->Bounds().IntegerHeight() > 0) {
181        return;
182    }
183
184    m_isSolidColor = true;
185    uint8* bits = reinterpret_cast<uint8*>(image->Bits());
186    m_solidColor = Color(bits[2], bits[1], bits[0], bits[3]);
187}
188
189BBitmap* BitmapImage::getBBitmap() const
190{
191    return const_cast<BitmapImage*>(this)->frameAtIndex(0);
192}
193
194} // namespace WebCore
195
196