83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
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// Copyright (c) 2019 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/browser/ui/gtk_util.h"
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#include <gdk/gdk.h>
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#include <gtk/gtk.h>
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#include <stdint.h>
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#include "third_party/skia/include/core/SkBitmap.h"
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#include "third_party/skia/include/core/SkColor.h"
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#include "third_party/skia/include/core/SkUnPreMultiply.h"
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namespace gtk_util {
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// Copied from L40-L55 in
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// https://cs.chromium.org/chromium/src/chrome/browser/ui/libgtkui/select_file_dialog_impl_gtk.cc
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#if GTK_CHECK_VERSION(3, 90, 0)
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// GTK stock items have been deprecated. The docs say to switch to using the
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// strings "_Open", etc. However this breaks i18n. We could supply our own
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// internationalized strings, but the "_" in these strings is significant: it's
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// the keyboard shortcut to select these actions. TODO: Provide
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// internationalized strings when GTK provides support for it.
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const char* const kCancelLabel = "_Cancel";
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const char* const kNoLabel = "_No";
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const char* const kOkLabel = "_OK";
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const char* const kOpenLabel = "_Open";
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const char* const kSaveLabel = "_Save";
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const char* const kYesLabel = "_Yes";
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#else
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS
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const char* const kCancelLabel = GTK_STOCK_CANCEL;
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const char* const kNoLabel = GTK_STOCK_NO;
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const char* const kOkLabel = GTK_STOCK_OK;
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const char* const kOpenLabel = GTK_STOCK_OPEN;
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const char* const kSaveLabel = GTK_STOCK_SAVE;
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const char* const kYesLabel = GTK_STOCK_YES;
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G_GNUC_END_IGNORE_DEPRECATIONS
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#endif
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GdkPixbuf* GdkPixbufFromSkBitmap(const SkBitmap& bitmap) {
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if (bitmap.isNull())
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return nullptr;
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int width = bitmap.width();
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int height = bitmap.height();
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GdkPixbuf* pixbuf =
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gdk_pixbuf_new(GDK_COLORSPACE_RGB, // The only colorspace gtk supports.
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TRUE, // There is an alpha channel.
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8, width, height);
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// SkBitmaps are premultiplied, we need to unpremultiply them.
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const int kBytesPerPixel = 4;
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uint8_t* divided = gdk_pixbuf_get_pixels(pixbuf);
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for (int y = 0, i = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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uint32_t pixel = bitmap.getAddr32(0, y)[x];
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int alpha = SkColorGetA(pixel);
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if (alpha != 0 && alpha != 255) {
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SkColor unmultiplied = SkUnPreMultiply::PMColorToColor(pixel);
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divided[i + 0] = SkColorGetR(unmultiplied);
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divided[i + 1] = SkColorGetG(unmultiplied);
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divided[i + 2] = SkColorGetB(unmultiplied);
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divided[i + 3] = alpha;
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} else {
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divided[i + 0] = SkColorGetR(pixel);
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divided[i + 1] = SkColorGetG(pixel);
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divided[i + 2] = SkColorGetB(pixel);
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divided[i + 3] = alpha;
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}
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i += kBytesPerPixel;
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}
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}
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return pixbuf;
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}
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} // namespace gtk_util
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