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libgimpwidgets: port GimpPickButton color picking to cairo

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This commit is contained in:
Michael Natterer
2010-08-08 16:10:14 +02:00
parent 789cc05baf
commit 10574e8f22
1 changed files with 20 additions and 16 deletions
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36
libgimpwidgets/gimppickbutton.c
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@ -25,6 +25,7 @@
#include "gimpwidgetstypes.h"
#include "gimpcairo-utils.h"
#include "gimphelpui.h"
#include "gimppickbutton.h"
#include "gimpstock.h"
@ -387,25 +388,28 @@ gimp_pick_button_pick (GdkScreen *screen,
gint y_root,
GimpPickButton *button)
{
GdkColormap *colormap = gdk_screen_get_system_colormap (screen);
GdkWindow *root_window = gdk_screen_get_root_window (screen);
GdkImage *image;
guint32 pixel;
GdkColor color;
GimpRGB rgb;
GdkWindow *root_window = gdk_screen_get_root_window (screen);
cairo_surface_t *image;
cairo_t *cr;
guchar *data;
guchar color[3];
GimpRGB rgb;
image = gdk_drawable_get_image (GDK_DRAWABLE (root_window),
x_root, y_root, 1, 1);
pixel = gdk_image_get_pixel (image, 0, 0);
g_object_unref (image);
image = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 1, 1);
gdk_colormap_query_color (colormap, pixel, &color);
cr = cairo_create (image);
gimp_rgba_set (&rgb,
color.red / 65535.0,
color.green / 65535.0,
color.blue / 65535.0,
1.0);
gdk_cairo_set_source_pixmap (cr, root_window, -x_root, -y_root);
cairo_paint (cr);
cairo_destroy (cr);
data = cairo_image_surface_get_data (image);
GIMP_CAIRO_RGB24_GET_PIXEL (data, color[0], color[1], color[2]);
cairo_surface_destroy (image);
gimp_rgba_set_uchar (&rgb, color[0], color[1], color[2], 1.0);
g_signal_emit (button, pick_button_signals[COLOR_PICKED], 0, &rgb);
}