Author: Carlos Lopez <genet...@gmail.com>
Date: Mon Sep 3 22:21:26 2012 +0200
Layer_Freetype: add support for inverted text in Cairo-Pango render.
---
.../src/modules/lyr_freetype/lyr_freetype.cpp | 30 ++++++++++++++++++--
1 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
b/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
index 14f3901..4fa1185 100644
--- a/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
+++ b/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
@@ -944,8 +944,17 @@ Layer_Freetype::accelerated_cairorender(Context
context,cairo_surface_t *surface
// Cairo context
cairo_surface_t* subimage;
+ cairo_surface_t* inverted;
subimage=cairo_surface_create_similar(surface,
CAIRO_CONTENT_COLOR_ALPHA, w, h);
cairo_t* subcr=cairo_create(subimage);
+ cairo_t* invertcr;
+ if(invert)
+ {
+ inverted=cairo_surface_create_similar(surface,
CAIRO_CONTENT_COLOR_ALPHA, w, h);
+ invertcr=cairo_create(inverted);
+ cairo_set_source_rgba(invertcr, color.get_r(), color.get_g(),
color.get_b(), color.get_a());
+ cairo_paint_with_alpha(invertcr, get_amount());
+ }
// Pango
PangoLayout *layout;
@@ -1007,7 +1016,8 @@ Layer_Freetype::accelerated_cairorender(Context
context,cairo_surface_t *surface
cairo_move_to(subcr, tx-logical_layout.width*orient[0],
(ty-(logical_layout.height+vspace_total)*vscale*orient[1])/vscale);
pango_cairo_show_layout(subcr, layout);
- if(0) // Debug
+ // Debug ink and logical lines
+ if(0)
{
pango_layout_get_pixel_extents(layout, &ink_rect,
&logical_rect);
// Render logical and ink rectangles
@@ -1037,16 +1047,30 @@ Layer_Freetype::accelerated_cairorender(Context
context,cairo_surface_t *surface
// Render the text on the target surface with the proper operator
cairo_restore(subcr);
+ if(invert)
+ {
+ cairo_set_source_surface(invertcr, subimage, 0,0);
+ cairo_set_operator(invertcr, CAIRO_OPERATOR_DEST_OUT);
+ cairo_paint_with_alpha(invertcr, get_amount());
+ }
cairo_t* cr=cairo_create(surface);
cairo_save(cr);
- cairo_set_source_surface(cr, subimage, 0, 0);
+ if(invert)
+ cairo_set_source_surface(cr, inverted, 0, 0);
+ else
+ cairo_set_source_surface(cr, subimage, 0, 0);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER); // TODO: this has to be
the real operator
cairo_paint_with_alpha(cr, get_amount());
cairo_restore(cr);
- // Debug ink and logical lines
// Destroy and return
+ cairo_surface_destroy(subimage);
cairo_destroy(subcr);
+ if(invert)
+ {
+ cairo_surface_destroy(inverted);
+ cairo_destroy(invertcr);
+ }
cairo_destroy(cr);
pango_attr_list_unref(attrlist);
g_object_unref (layout);
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