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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/image/cairo_cached_surface.h"
#include <gtk/gtk.h>
#include "base/basictypes.h"
#include "base/logging.h"
namespace gfx {
CairoCachedSurface::CairoCachedSurface() : pixbuf_(NULL) {
}
CairoCachedSurface::~CairoCachedSurface() {
Reset();
}
void CairoCachedSurface::Reset() {
for (SurfaceVector::iterator it = surface_map_.begin();
it != surface_map_.end(); ++it) {
cairo_surface_destroy(it->second);
}
surface_map_.clear();
if (pixbuf_) {
g_object_unref(pixbuf_);
pixbuf_ = NULL;
}
}
int CairoCachedSurface::Width() const {
return pixbuf_ ? gdk_pixbuf_get_width(pixbuf_) : -1;
}
int CairoCachedSurface::Height() const {
return pixbuf_ ? gdk_pixbuf_get_height(pixbuf_) : -1;
}
void CairoCachedSurface::UsePixbuf(GdkPixbuf* pixbuf) {
if (pixbuf)
g_object_ref(pixbuf);
Reset();
pixbuf_ = pixbuf;
}
void CairoCachedSurface::SetSource(cairo_t* cr, GtkWidget* widget,
int x, int y) const {
SetSource(cr, gtk_widget_get_display(widget), x, y);
}
void CairoCachedSurface::SetSource(cairo_t* cr, GdkDisplay* display,
int x, int y) const {
DCHECK(pixbuf_);
DCHECK(cr);
DCHECK(display);
cairo_surface_t* surface = GetSurfaceFor(cr, display);
cairo_set_source_surface(cr, surface, x, y);
}
void CairoCachedSurface::MaskSource(cairo_t* cr, GtkWidget* widget,
int x, int y) const {
MaskSource(cr, gtk_widget_get_display(widget), x, y);
}
void CairoCachedSurface::MaskSource(cairo_t* cr, GdkDisplay* display,
int x, int y) const {
DCHECK(pixbuf_);
DCHECK(cr);
DCHECK(display);
cairo_surface_t* surface = GetSurfaceFor(cr, display);
cairo_mask_surface(cr, surface, x, y);
}
cairo_surface_t* CairoCachedSurface::GetSurfaceFor(cairo_t* cr,
GdkDisplay* display) const {
for (SurfaceVector::const_iterator it = surface_map_.begin();
it != surface_map_.end(); ++it) {
if (display == it->first) {
return it->second;
}
}
// First time here since last UsePixbuf call. Generate the surface.
cairo_surface_t* target = cairo_get_target(cr);
cairo_surface_t* out = cairo_surface_create_similar(
target,
CAIRO_CONTENT_COLOR_ALPHA,
gdk_pixbuf_get_width(pixbuf_),
gdk_pixbuf_get_height(pixbuf_));
DCHECK(out);
cairo_t* copy_cr = cairo_create(out);
gdk_cairo_set_source_pixbuf(copy_cr, pixbuf_, 0, 0);
cairo_paint(copy_cr);
cairo_destroy(copy_cr);
surface_map_.push_back(std::make_pair(display, out));
return out;
}
} // namespace gfx
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