Mercurial > MadButterfly

changeset 597:3300992b29ff openvg

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Define mbe_clear() for VG
author Thinker K.F. Li <thinker@branda.to>
date Thu, 01 Jul 2010 15:52:29 +0800
parents aaab76730beb
children aba62eb9362d
files include/mb_graph_engine_openvg.h src/graph_engine_openvg.c
diffstat 2 files changed, 21 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/include/mb_graph_engine_openvg.h	Thu Jul 01 14:48:57 2010 +0800
+++ b/include/mb_graph_engine_openvg.h	Thu Jul 01 15:52:29 2010 +0800
@@ -62,7 +62,6 @@
 #define mbe_move_to(canvas, x, y)
 #define mbe_line_to(canvas, x, y)
 #define mbe_in_fill(canvas, x, y) (0)
-#define mbe_clear(canvas)
 #define mbe_save(canvas)
 #define mbe_arc(canvas, x, y, radius, angle_start, angle_stop)
 
@@ -177,6 +176,7 @@
 extern mbe_t *mbe_create(mbe_surface_t *surface);
 extern void mbe_destroy(mbe_t *canvas);
 extern void mbe_paint(mbe_t *canvas);
+extern void mbe_clear(mbe_t *canvas);
 
 static void
 mbe_stroke(mbe_t *canvas) {
--- a/src/graph_engine_openvg.c	Thu Jul 01 14:48:57 2010 +0800
+++ b/src/graph_engine_openvg.c	Thu Jul 01 15:52:29 2010 +0800
@@ -267,6 +267,7 @@
     
     canvas->src = NULL;
     canvas->paint = VG_INVALID_HANDLE;
+    canvas->paint_installed = 0;
     canvas->tgt = surface;
     canvas->ctx = ctx;
     canvas->path = path;
@@ -314,3 +315,22 @@
     vgSeti(VG_SCISSORING, VG_TRUE);
 }
 
+void
+mbe_clear(mbe_t *canvas) {
+    VGPaint paint;
+
+    _MK_CURRENT_CTX(canvas);
+
+    paint = vgCreatePaint();
+    ASSERT(paint != VG_INVALID_HANDLE);
+    vgSetColor(paint, 0);
+    
+    vgSetPaint(paint, VG_FILL_PATH);
+    vgSeti(VG_BLEND_MODE, VG_BLEND_SRC);
+    vgDrawPath(canvas->path, VG_FILL_PATH);
+    vgSeti(VG_BLEND_MODE, VG_BLEND_SRC_OVER);
+
+    vgDestroyPaint(paint);
+
+    canvas->paint_installed = 0;
+}