/*
* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "BitmapImage.h"
#if PLATFORM(CAIRO)
#include "AffineTransform.h"
#include "FloatRect.h"
#include "GraphicsContext.h"
#include <cairo.h>
#include <math.h>
namespace WebCore {
void FrameData::clear()
{
if (m_frame) {
cairo_surface_destroy(m_frame);
m_frame = 0;
m_duration = 0.;
m_hasAlpha = true;
}
}
// ================================================
// Image Class
// ================================================
// Drawing Routines
void BitmapImage::draw(GraphicsContext* context, const FloatRect& dst, const FloatRect& src, CompositeOperator op)
{
cairo_t* cr = context->platformContext();
if (!m_source.initialized())
return;
cairo_surface_t* image = frameAtIndex(m_currentFrame);
if (!image) // If it's too early we won't have an image yet.
return;
IntSize selfSize = size();
FloatRect srcRect(src);
FloatRect dstRect(dst);
cairo_save(cr);
// Set the compositing operation.
if (op == CompositeSourceOver && !frameHasAlphaAtIndex(m_currentFrame))
context->setCompositeOperation(CompositeCopy);
else
context->setCompositeOperation(op);
// If we're drawing a sub portion of the image or scaling then create
// a pattern transformation on the image and draw the transformed pattern.
// Test using example site at http://www.meyerweb.com/eric/css/edge/complexspiral/demo.html
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
// To avoid the unwanted gradient effect (#14017) we use
// CAIRO_FILTER_NEAREST now, but the real fix will be to have
// CAIRO_EXTEND_PAD implemented for surfaces in Cairo allowing us to still
// use bilinear filtering
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
float scaleX = srcRect.width() / dstRect.width();
float scaleY = srcRect.height() / dstRect.height();
cairo_matrix_t matrix = { scaleX, 0, 0 , scaleY, srcRect.x(), srcRect.y() };
cairo_pattern_set_matrix(pattern, &matrix);
// Draw the image.
cairo_translate(cr, dstRect.x(), dstRect.y());
cairo_set_source(cr, pattern);
cairo_rectangle(cr, 0, 0, dstRect.width(), dstRect.height());
cairo_fill(cr);
cairo_pattern_destroy(pattern);
cairo_restore(cr);
startAnimation();
}
void Image::drawPattern(GraphicsContext* context, const FloatRect& tileRect, const AffineTransform& patternTransform,
const FloatPoint& phase, CompositeOperator op, const FloatRect& destRect)
{
cairo_surface_t* image = nativeImageForCurrentFrame();
if (!image) // If it's too early we won't have an image yet.
return;
cairo_t* cr = context->platformContext();
context->save();
// TODO: Make use of tileRect.
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
// Workaround to avoid the unwanted gradient effect (#14017)
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
cairo_matrix_t pattern_matrix = cairo_matrix_t(patternTransform);
cairo_matrix_t phase_matrix = {1, 0, 0, 1, phase.x(), phase.y()};
cairo_matrix_t combined;
cairo_matrix_multiply(&combined, &pattern_matrix, &phase_matrix);
cairo_matrix_invert(&combined);
cairo_pattern_set_matrix(pattern, &combined);
context->setCompositeOperation(op);
cairo_set_source(cr, pattern);
cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
cairo_fill(cr);
cairo_pattern_destroy(pattern);
context->restore();
}
void BitmapImage::checkForSolidColor()
{
// FIXME: It's easy to implement this optimization. Just need to check the RGBA32 buffer to see if it is 1x1.
m_isSolidColor = false;
}
}
#endif // PLATFORM(CAIRO)