1 files changed, 187 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/cairo/ImageCairo.cpp b/WebCore/platform/graphics/cairo/ImageCairo.cpp
new file mode 100644
index 0000000..0a35cf2
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+++ b/WebCore/platform/graphics/cairo/ImageCairo.cpp
@@ -0,0 +1,187 @@
+/*
+ * 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 "ImageObserver.h"
+#include <cairo.h>
+#include <math.h>
+
+namespace WebCore {
+
+void FrameData::clear()
+{
+    if (m_frame) {
+        cairo_surface_destroy(m_frame);
+        m_frame = 0;
+        // NOTE: We purposefully don't reset metadata here, so that even if we
+        // throw away previously-decoded data, animation loops can still access
+        // properties like frame durations without re-decoding.
+    }
+}
+
+BitmapImage::BitmapImage(cairo_surface_t* surface, ImageObserver* observer)
+    : Image(observer)
+    , m_currentFrame(0)
+    , m_frames(0)
+    , m_frameTimer(0)
+    , m_repetitionCount(cAnimationNone)
+    , m_repetitionCountStatus(Unknown)
+    , m_repetitionsComplete(0)
+    , m_isSolidColor(false)
+    , m_animationFinished(true)
+    , m_allDataReceived(true)
+    , m_haveSize(true)
+    , m_sizeAvailable(true)
+    , m_decodedSize(0)
+    , m_haveFrameCount(true)
+    , m_frameCount(1)
+{
+    initPlatformData();
+
+    // TODO: check to be sure this is an image surface
+
+    int width = cairo_image_surface_get_width(surface);
+    int height = cairo_image_surface_get_height(surface);
+    m_decodedSize = width * height * 4;
+    m_size = IntSize(width, height);
+
+    m_frames.grow(1);
+    m_frames[0].m_frame = surface;
+    m_frames[0].m_hasAlpha = cairo_surface_get_content(surface) != CAIRO_CONTENT_COLOR;
+    m_frames[0].m_haveMetadata = true;
+    checkForSolidColor();
+}
+
+void BitmapImage::draw(GraphicsContext* context, const FloatRect& dst, const FloatRect& src, CompositeOperator op)
+{
+    startAnimation();
+
+    cairo_surface_t* image = frameAtIndex(m_currentFrame);
+    if (!image) // If it's too early we won't have an image yet.
+        return;
+
+    FloatRect srcRect(src);
+    FloatRect dstRect(dst);
+
+    if (mayFillWithSolidColor()) {
+        fillWithSolidColor(context, dstRect, solidColor(), op);
+        return;
+    }
+
+    IntSize selfSize = size();
+
+    cairo_t* cr = context->platformContext();
+    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_pattern_destroy(pattern);
+    cairo_rectangle(cr, 0, 0, dstRect.width(), dstRect.height());
+    cairo_clip(cr);
+    cairo_paint_with_alpha(cr, context->getAlpha());
+
+    cairo_restore(cr);
+
+    if (imageObserver())
+        imageObserver()->didDraw(this);
+}
+
+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_pattern_destroy(pattern);
+    cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
+    cairo_fill(cr);
+
+    context->restore();
+
+    if (imageObserver())
+        imageObserver()->didDraw(this);
+}
+
+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)