evas render - async sw - fix context duplication by using proper dup call

valgrind pointed this one out. we access freed memory when we dup a
context because the context CONTAINS ptrs to things like rects for
cutouts. we didnt dup these. use the proper context dup call (and
properly ref pixman color image too). this was a random bug/crash
waiting to happen and valgrind caught it. suprising it hasnt turned up
before :/

@fix

diff --git a/src/lib/evas/common/evas_draw_main.c b/src/lib/evas/common/evas_draw_main.c
index 3a62d94..b444608 100644 (file)
--- a/src/lib/evas/common/evas_draw_main.c
+++ b/src/lib/evas/common/evas_draw_main.c
@@ -107,6 +107,12 @@ evas_common_draw_context_dup(RGBA_Draw_Context *dc)
    dc2 = malloc(sizeof(RGBA_Draw_Context));
    memcpy(dc2, dc, sizeof(RGBA_Draw_Context));
    evas_common_draw_context_cutouts_dup(&dc2->cutout, &dc->cutout);
+#ifdef HAVE_PIXMAN
+#if defined(PIXMAN_FONT) || defined(PIXMAN_RECT) || defined(PIXMAN_LINE) || defined(PIXMAN_POLY)
+   if (dc2->col.pixman_color_image)
+     pixman_image_ref(dc2->col.pixman_color_image);
+#endif
+#endif
    return dc2;
 }
 

diff --git a/src/modules/evas/engines/software_generic/evas_engine.c b/src/modules/evas/engines/software_generic/evas_engine.c
index 553b353..0a541d3 100644 (file)
--- a/src/modules/evas/engines/software_generic/evas_engine.c
+++ b/src/modules/evas/engines/software_generic/evas_engine.c
@@ -371,7 +371,7 @@ struct _Evas_Thread_Command_Font
 struct _Evas_Thread_Command_Map
 {
    void *image;
-   RGBA_Draw_Context image_ctx;
+   RGBA_Draw_Context *image_ctx;
    void *surface;
    Eina_Rectangle clip;
    DATA32 mul_col;
@@ -385,7 +385,7 @@ struct _Evas_Thread_Command_Map
 
 struct _Evas_Thread_Command_Multi_Font
 {
-   RGBA_Draw_Context context;
+   RGBA_Draw_Context *context;
    void *surface;
    int x, y;
    Evas_Font_Array *texts;
@@ -2068,25 +2068,25 @@ _draw_thread_map_draw(void *data)
              dw = (m->pts[2 + offset].x >> FP) - dx;
              dh = (m->pts[2 + offset].y >> FP) - dy;
 
-             col = map->image_ctx.mul.col;
-             use = map->image_ctx.mul.use;
-             if (use) map->image_ctx.mul.col = MUL4_SYM(col, m->pts[0].col);
-             else map->image_ctx.mul.col = m->pts[0].col;
-             map->image_ctx.mul.use = 1;
+             col = map->image_ctx->mul.col;
+             use = map->image_ctx->mul.use;
+             if (use) map->image_ctx->mul.col = MUL4_SYM(col, m->pts[0].col);
+             else map->image_ctx->mul.col = m->pts[0].col;
+             map->image_ctx->mul.use = 1;
 
              if (map->smooth)
                evas_common_scale_rgba_in_to_out_clip_cb
-                 (im, map->surface, &map->image_ctx,
+                 (im, map->surface, map->image_ctx,
                   0, 0, im->cache_entry.w, im->cache_entry.h,
                   dx, dy, dw, dh, _map_image_smooth_draw);
              else
                evas_common_scale_rgba_in_to_out_clip_cb
-                 (im, map->surface, &map->image_ctx,
+                 (im, map->surface, map->image_ctx,
                   0, 0, im->cache_entry.w, im->cache_entry.h,
                   dx, dy, dw, dh, _map_image_sample_draw);
 
-             map->image_ctx.mul.col = col;
-             map->image_ctx.mul.use = use;
+             map->image_ctx->mul.col = col;
+             map->image_ctx->mul.use = use;
           }
         else
           {
@@ -2106,6 +2106,7 @@ _draw_thread_map_draw(void *data)
 
  free_out:
    free(m);
+   evas_common_draw_context_free(map->image_ctx);
    eina_mempool_free(_mp_command_map, map);
 }
 
@@ -2119,7 +2120,7 @@ _map_draw_thread_cmd(RGBA_Image *src, RGBA_Image *dst, RGBA_Draw_Context *dc, RG
    if (!cm) return EINA_FALSE;
 
    cm->image = src;
-   memcpy(&cm->image_ctx, dc, sizeof(*dc));
+   cm->image_ctx = evas_common_draw_context_dup(dc);
    cm->surface = dst;
 
    if (dc->clip.use)
@@ -2402,11 +2403,12 @@ _draw_thread_multi_font_draw(void *data)
         b = itr->color.b;
         a = itr->color.a;
 
-        eng_context_color_set(NULL, &mf->context, r, g, b, a);
-        evas_common_font_draw(mf->surface, &mf->context, x, y, itr->glyphs);
+        eng_context_color_set(NULL, mf->context, r, g, b, a);
+        evas_common_font_draw(mf->surface, mf->context, x, y, itr->glyphs);
         evas_common_cpu_end_opt();
      }
 
+   evas_common_draw_context_free(mf->context);
    eina_mempool_free(_mp_command_multi_font, mf);
 }
 
@@ -2424,7 +2426,7 @@ _multi_font_draw_thread_cmd(RGBA_Image *dst, RGBA_Draw_Context *dc, int x, int y
         return EINA_FALSE;
      }
 
-   memcpy(&mf->context, dc, sizeof(*dc));
+   mf->context = evas_common_draw_context_dup(dc);
    mf->surface = dst;
    mf->x = x;
    mf->y = y;