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// Copyright (c) 2009 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 "base/gfx/gtk_util.h"
#include <gdk/gdk.h>
#include "base/gfx/rect.h"
#include "skia/include/SkBitmap.h"
namespace gfx {
void SubtractRectanglesFromRegion(GdkRegion* region,
const std::vector<gfx::Rect>& cutouts) {
for (size_t i = 0; i < cutouts.size(); ++i) {
GdkRectangle rect = cutouts[i].ToGdkRectangle();
GdkRegion* rect_region = gdk_region_rectangle(&rect);
gdk_region_subtract(region, rect_region);
// TODO(deanm): It would be nice to be able to reuse the GdkRegion here.
gdk_region_destroy(rect_region);
}
}
static void FreePixels(guchar* pixels, gpointer data) {
free(data);
}
GdkPixbuf* GdkPixbufFromSkBitmap(const SkBitmap* bitmap) {
bitmap->lockPixels();
int width = bitmap->width();
int height = bitmap->height();
int stride = bitmap->rowBytes();
const guchar* orig_data = static_cast<guchar*>(bitmap->getPixels());
guchar* data = static_cast<guchar*>(malloc(height * stride));
// We have to copy the pixels and swap from BGRA to RGBA.
for (int i = 0; i < height; ++i) {
for (int j = 0; j < width; ++j) {
int idx = i * stride + j * 4;
data[idx] = orig_data[idx + 2];
data[idx + 1] = orig_data[idx + 1];
data[idx + 2] = orig_data[idx];
data[idx + 3] = orig_data[idx + 3];
}
}
// This pixbuf takes ownership of our malloc()ed data and will
// free it for us when it is destroyed.
GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
data,
GDK_COLORSPACE_RGB, // The only colorspace gtk supports.
true, // There is an alpha channel.
8,
width, height, stride, &FreePixels, data);
// Assume ownership of pixbuf.
g_object_ref_sink(pixbuf);
bitmap->unlockPixels();
return pixbuf;
}
} // namespace gfx
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