Move symbolic pixbuf recoloring code

This function is better off next to the other
symbolic png code in gdkpixbufutils.c.

1 files changed, 93 insertions, 0 deletions

diff --git a/gtk/tools/gdkpixbufutils.c b/gtk/tools/gdkpixbufutils.c
index ae2684adb2..7d206f05a4 100644
--- a/gtk/tools/gdkpixbufutils.c
+++ b/gtk/tools/gdkpixbufutils.c
@@ -285,6 +285,99 @@ load_symbolic_svg (const char     *escaped_file_data,
 }
 
 static void
+rgba_to_pixel (const GdkRGBA *rgba,
+               guint8         pixel[4])
+{
+  pixel[0] = rgba->red * 255;
+  pixel[1] = rgba->green * 255;
+  pixel[2] = rgba->blue * 255;
+  pixel[3] = 255;
+}
+
+GdkPixbuf *
+gtk_color_symbolic_pixbuf (GdkPixbuf     *symbolic,
+                           const GdkRGBA *fg_color,
+                           const GdkRGBA *success_color,
+                           const GdkRGBA *warning_color,
+                           const GdkRGBA *error_color)
+{
+  int width, height, x, y, src_stride, dst_stride;
+  guchar *src_data, *dst_data;
+  guchar *src_row, *dst_row;
+  int alpha;
+  GdkPixbuf *colored;
+  guint8 fg_pixel[4], success_pixel[4], warning_pixel[4], error_pixel[4];
+
+  alpha = fg_color->alpha * 255;
+
+  rgba_to_pixel (fg_color, fg_pixel);
+  rgba_to_pixel (success_color, success_pixel);
+  rgba_to_pixel (warning_color, warning_pixel);
+  rgba_to_pixel (error_color, error_pixel);
+
+  width = gdk_pixbuf_get_width (symbolic);
+  height = gdk_pixbuf_get_height (symbolic);
+
+  colored = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height);
+
+  src_stride = gdk_pixbuf_get_rowstride (symbolic);
+  src_data = gdk_pixbuf_get_pixels (symbolic);
+
+  dst_data = gdk_pixbuf_get_pixels (colored);
+  dst_stride = gdk_pixbuf_get_rowstride (colored);
+  for (y = 0; y < height; y++)
+    {
+      src_row = src_data + src_stride * y;
+      dst_row = dst_data + dst_stride * y;
+      for (x = 0; x < width; x++)
+        {
+          guint r, g, b, a;
+          int c1, c2, c3, c4;
+
+          a = src_row[3];
+          dst_row[3] = a * alpha / 255;
+
+          if (a == 0)
+            {
+              dst_row[0] = 0;
+              dst_row[1] = 0;
+              dst_row[2] = 0;
+            }
+          else
+            {
+              c2 = src_row[0];
+              c3 = src_row[1];
+              c4 = src_row[2];
+
+              if (c2 == 0 && c3 == 0 && c4 == 0)
+                {
+                  dst_row[0] = fg_pixel[0];
+                  dst_row[1] = fg_pixel[1];
+                  dst_row[2] = fg_pixel[2];
+                }
+              else
+                {
+                  c1 = 255 - c2 - c3 - c4;
+
+                  r = fg_pixel[0] * c1 + success_pixel[0] * c2 +  warning_pixel[0] * c3 +  error_pixel[0] * c4;
+                  g = fg_pixel[1] * c1 + success_pixel[1] * c2 +  warning_pixel[1] * c3 +  error_pixel[1] * c4;
+                  b = fg_pixel[2] * c1 + success_pixel[2] * c2 +  warning_pixel[2] * c3 +  error_pixel[2] * c4;
+
+                  dst_row[0] = r / 255;
+                  dst_row[1] = g / 255;
+                  dst_row[2] = b / 255;
+                }
+            }
+
+          src_row += 4;
+          dst_row += 4;
+        }
+    }
+
+  return colored;
+}
+
+static void
 extract_plane (GdkPixbuf *src,
                GdkPixbuf *dst,
                int        from_plane,