+// scale a pixbuf, return new pixbuf, unref old one
+static GdkPixbuf*
+Scale(GdkPixbuf* pixbuf, int dst_w, int dst_h, double sx, double sy)
+{
+ GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
+ GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, dst_w, dst_h);
+ gdk_pixbuf_scale(pixbuf, pixbuf_scaled,
+ 0, 0, dst_w, dst_h, 0, 0, sx, sy, GDK_INTERP_NEAREST);
+ g_object_unref(pixbuf);
+ return pixbuf_scaled;
+}
+
+// scale part of a pixmap using pixbuf scaling, return pixbuf
+static GdkPixbuf*
+Scale(GdkPixmap* pixmap, int x, int y, int w, int h, int dst_w, int dst_h, double sx, double sy)
+{
+ GdkPixbuf* pixbuf = gdk_pixbuf_get_from_drawable(
+ NULL, pixmap, NULL, x, y, 0, 0, w, h);
+ return Scale(pixbuf, dst_w, dst_h, sx, sy);
+}
+
+// scale part of a mask pixmap, return new mask, unref old one
+static GdkPixmap*
+ScaleMask(GdkPixmap* mask, int x, int y, int w, int h, int dst_w, int dst_h, double sx, double sy)
+{
+ GdkPixbuf* pixbuf = Scale(mask, x, y, w, h, dst_w, dst_h, sx, sy);
+
+ // convert black and white pixbuf back to a mono pixmap
+ const unsigned out_rowstride = (dst_w + 7) / 8;
+ const size_t data_size = out_rowstride * size_t(dst_h);
+ char* data = new char[data_size];
+ char* out = data;
+ const guchar* row = gdk_pixbuf_get_pixels(pixbuf);
+ const int rowstride = gdk_pixbuf_get_rowstride(pixbuf);
+ memset(data, 0, data_size);
+ for (int j = 0; j < dst_h; j++, row += rowstride, out += out_rowstride)
+ {
+ const guchar* in = row;
+ for (int i = 0; i < dst_w; i++, in += 3)
+ if (*in)
+ out[i >> 3] |= 1 << (i & 7);
+ }
+ g_object_unref(pixbuf);
+ GdkPixmap* pixmap = gdk_bitmap_create_from_data(mask, data, dst_w, dst_h);
+ delete[] data;
+ g_object_unref(mask);
+ return pixmap;
+}
+
+// Make a new mask from part of a mask and a clip region.
+// Return new mask, unref old one.
+static GdkPixmap*
+ClipMask(GdkPixmap* mask, GdkRegion* clipRegion, int x, int y, int dst_x, int dst_y, int w, int h)
+{
+ GdkGCValues gcValues;
+ gcValues.foreground.pixel = 0;
+ GdkGC* gc = gdk_gc_new_with_values(mask, &gcValues, GDK_GC_FOREGROUND);
+ GdkPixmap* pixmap = gdk_pixmap_new(mask, w, h, 1);
+ // clear new mask, so clipped areas will be masked
+ gdk_draw_rectangle(pixmap, gc, true, 0, 0, w, h);
+ gdk_gc_set_clip_region(gc, clipRegion);
+ gdk_gc_set_clip_origin(gc, -dst_x, -dst_y);
+ // draw old mask onto new one, with clip
+ gdk_draw_drawable(pixmap, gc, mask, x, y, 0, 0, w, h);
+ g_object_unref(gc);
+ g_object_unref(mask);
+ return pixmap;
+}
+
+// make a color pixmap from part of a mono one, using text fg/bg colors
+GdkPixmap*
+wxWindowDCImpl::MonoToColor(GdkPixmap* monoPixmap, int x, int y, int w, int h) const
+{
+ GdkPixmap* pixmap = gdk_pixmap_new(m_gdkwindow, w, h, -1);
+ GdkGCValues gcValues;
+ gcValues.foreground.pixel = m_textForegroundColour.GetColor()->pixel;
+ gcValues.background.pixel = m_textBackgroundColour.GetColor()->pixel;
+ gcValues.stipple = monoPixmap;
+ gcValues.fill = GDK_OPAQUE_STIPPLED;
+ gcValues.ts_x_origin = -x;
+ gcValues.ts_y_origin = -y;
+ GdkGC* gc = gdk_gc_new_with_values(pixmap, &gcValues, GdkGCValuesMask(
+ GDK_GC_FOREGROUND | GDK_GC_BACKGROUND | GDK_GC_STIPPLE | GDK_GC_FILL |
+ GDK_GC_TS_X_ORIGIN | GDK_GC_TS_Y_ORIGIN));
+ gdk_draw_rectangle(pixmap, gc, true, 0, 0, w, h);
+ g_object_unref(gc);
+ return pixmap;
+}
+
projects / wxWidgets.git / blobdiff