switch agg rendering from 16 to 32 bits screen coordinates for huge images support

nicolas-pascal · nicolas-pascal · commit 70bb03075376 · 2014-09-12T13:24:31.000+02:00
diff --git a/src/_backend_agg.h b/src/_backend_agg.h
@@ -60,10 +60,15 @@ typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_aa;
 typedef agg::renderer_scanline_bin_solid<renderer_base> renderer_bin;
 typedef agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_dbl> rasterizer;
 
-typedef agg::scanline_p8 scanline_p8;
-typedef agg::scanline_bin scanline_bin;
+// typedef agg::scanline_p8 scanline_p8; // 16 bits display rendering
+// typedef agg::scanline_bin scanline_bin; // 16 bits display rendering
+typedef agg::scanline32_p8 scanline_p8; // 32 bits display rendering
+typedef agg::scanline32_bin scanline_bin; // 32 bits display rendering
+
 typedef agg::amask_no_clip_gray8 alpha_mask_type;
-typedef agg::scanline_u8_am<alpha_mask_type> scanline_am;
+
+// typedef agg::scanline_u8_am<alpha_mask_type> scanline_am; // 16 bits display rendering
+typedef agg::scanline32_u8_am<alpha_mask_type> scanline_am; // 32 bits display rendering
 
 typedef agg::renderer_base<agg::pixfmt_gray8> renderer_base_alpha_mask_type;
 typedef agg::renderer_scanline_aa_solid<renderer_base_alpha_mask_type> renderer_alpha_mask_type;
diff --git a/src/cntr.c b/src/cntr.c
@@ -183,7 +183,8 @@
 
 /* the data about edges, zones, and points -- boundary or not, exists
  * or not, z value 0, 1, or 2 -- is kept in a mesh sized data array */
-typedef short Cdata;
+// typedef short Cdata; // 16 bits display rendering
+typedef int Cdata; // 32 bits display rendering
 
 /* information to decide on correct contour direction in saddle zones
  * is stored in a mesh sized array.  Only those entries corresponding
