1/* 2 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> 4 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "config.h" 29#include "BitmapImage.h" 30 31#if USE(CAIRO) 32 33#include "AffineTransform.h" 34#include "CairoUtilities.h" 35#include "Color.h" 36#include "ContextShadow.h" 37#include "FloatRect.h" 38#include "GraphicsContext.h" 39#include "PlatformContextCairo.h" 40#include "ImageBuffer.h" 41#include "ImageObserver.h" 42#include "RefPtrCairo.h" 43#include <cairo.h> 44#include <math.h> 45#include <wtf/OwnPtr.h> 46 47namespace WebCore { 48 49bool FrameData::clear(bool clearMetadata) 50{ 51 if (clearMetadata) 52 m_haveMetadata = false; 53 54 if (m_frame) { 55 cairo_surface_destroy(m_frame); 56 m_frame = 0; 57 return true; 58 } 59 return false; 60} 61 62BitmapImage::BitmapImage(cairo_surface_t* surface, ImageObserver* observer) 63 : Image(observer) 64 , m_currentFrame(0) 65 , m_frames(0) 66 , m_frameTimer(0) 67 , m_repetitionCount(cAnimationNone) 68 , m_repetitionCountStatus(Unknown) 69 , m_repetitionsComplete(0) 70 , m_isSolidColor(false) 71 , m_checkedForSolidColor(false) 72 , m_animationFinished(true) 73 , m_allDataReceived(true) 74 , m_haveSize(true) 75 , m_sizeAvailable(true) 76 , m_decodedSize(0) 77 , m_haveFrameCount(true) 78 , m_frameCount(1) 79{ 80 initPlatformData(); 81 82 // TODO: check to be sure this is an image surface 83 84 int width = cairo_image_surface_get_width(surface); 85 int height = cairo_image_surface_get_height(surface); 86 m_decodedSize = width * height * 4; 87 m_size = IntSize(width, height); 88 89 m_frames.grow(1); 90 m_frames[0].m_frame = surface; 91 m_frames[0].m_hasAlpha = cairo_surface_get_content(surface) != CAIRO_CONTENT_COLOR; 92 m_frames[0].m_haveMetadata = true; 93 checkForSolidColor(); 94} 95 96void BitmapImage::draw(GraphicsContext* context, const FloatRect& dst, const FloatRect& src, ColorSpace styleColorSpace, CompositeOperator op) 97{ 98 FloatRect srcRect(src); 99 FloatRect dstRect(dst); 100 101 if (dstRect.width() == 0.0f || dstRect.height() == 0.0f || 102 srcRect.width() == 0.0f || srcRect.height() == 0.0f) 103 return; 104 105 startAnimation(); 106 107 cairo_surface_t* image = frameAtIndex(m_currentFrame); 108 if (!image) // If it's too early we won't have an image yet. 109 return; 110 111 if (mayFillWithSolidColor()) { 112 fillWithSolidColor(context, dstRect, solidColor(), styleColorSpace, op); 113 return; 114 } 115 116 IntSize selfSize = size(); 117 118 cairo_t* cr = context->platformContext()->cr(); 119 context->save(); 120 121 // Set the compositing operation. 122 if (op == CompositeSourceOver && !frameHasAlphaAtIndex(m_currentFrame)) 123 context->setCompositeOperation(CompositeCopy); 124 else 125 context->setCompositeOperation(op); 126 127 // If we're drawing a sub portion of the image or scaling then create 128 // a pattern transformation on the image and draw the transformed pattern. 129 // Test using example site at http://www.meyerweb.com/eric/css/edge/complexspiral/demo.html 130 cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image); 131 132 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD); 133 134 float scaleX = srcRect.width() / dstRect.width(); 135 float scaleY = srcRect.height() / dstRect.height(); 136 cairo_matrix_t matrix = { scaleX, 0, 0, scaleY, srcRect.x(), srcRect.y() }; 137 cairo_pattern_set_matrix(pattern, &matrix); 138 139 ContextShadow* shadow = context->contextShadow(); 140 ASSERT(shadow); 141 if (shadow->m_type != ContextShadow::NoShadow) { 142 cairo_t* shadowContext = shadow->beginShadowLayer(context, dstRect); 143 if (shadowContext) { 144 cairo_translate(shadowContext, dstRect.x(), dstRect.y()); 145 cairo_set_source(shadowContext, pattern); 146 cairo_rectangle(shadowContext, 0, 0, dstRect.width(), dstRect.height()); 147 cairo_fill(shadowContext); 148 shadow->endShadowLayer(context); 149 } 150 } 151 152 // Draw the image. 153 cairo_translate(cr, dstRect.x(), dstRect.y()); 154 cairo_set_source(cr, pattern); 155 cairo_pattern_destroy(pattern); 156 cairo_rectangle(cr, 0, 0, dstRect.width(), dstRect.height()); 157 cairo_clip(cr); 158 cairo_paint_with_alpha(cr, context->getAlpha()); 159 160 context->restore(); 161 162 if (imageObserver()) 163 imageObserver()->didDraw(this); 164} 165 166void Image::drawPattern(GraphicsContext* context, const FloatRect& tileRect, const AffineTransform& patternTransform, 167 const FloatPoint& phase, ColorSpace colorSpace, CompositeOperator op, const FloatRect& destRect) 168{ 169 cairo_surface_t* image = nativeImageForCurrentFrame(); 170 if (!image) // If it's too early we won't have an image yet. 171 return; 172 173 cairo_t* cr = context->platformContext()->cr(); 174 drawPatternToCairoContext(cr, image, size(), tileRect, patternTransform, phase, toCairoOperator(op), destRect); 175 176 if (imageObserver()) 177 imageObserver()->didDraw(this); 178} 179 180void BitmapImage::checkForSolidColor() 181{ 182 m_isSolidColor = false; 183 m_checkedForSolidColor = true; 184 185 if (frameCount() > 1) 186 return; 187 188 cairo_surface_t* frameSurface = frameAtIndex(0); 189 if (!frameSurface) 190 return; 191 192 ASSERT(cairo_surface_get_type(frameSurface) == CAIRO_SURFACE_TYPE_IMAGE); 193 194 int width = cairo_image_surface_get_width(frameSurface); 195 int height = cairo_image_surface_get_height(frameSurface); 196 197 if (width != 1 || height != 1) 198 return; 199 200 unsigned* pixelColor = reinterpret_cast<unsigned*>(cairo_image_surface_get_data(frameSurface)); 201 m_solidColor = colorFromPremultipliedARGB(*pixelColor); 202 203 m_isSolidColor = true; 204} 205 206} 207 208#endif // USE(CAIRO) 209