More informative error message when data is too large for Agg to draw it.

mdboom · mdboom · commit e9fcc085c340 · 2008-10-08T18:16:49.000Z
svn path=/trunk/matplotlib/; revision=6172
diff --git a/agg24/include/agg_rasterizer_cells_aa.h b/agg24/include/agg_rasterizer_cells_aa.h
@@ -185,7 +185,10 @@ namespace agg
             if((m_num_cells & cell_block_mask) == 0)
             {
                 if(m_num_blocks >= cell_block_limit) {
-                    throw "Agg rendering complexity exceeded.";
+                    /* If this exception is thrown too often, one can
+                       increase cell_block_limit */
+                    throw "Agg rendering complexity exceeded. "
+                        "Consider downsampling or decimating your data.";
                 }
                 allocate_block();
             }

Original file line number	Diff line number	Diff line change
`@@ -185,7 +185,10 @@ namespace agg`
`185`	`185`	`if((m_num_cells & cell_block_mask) == 0)`
`186`	`186`	`{`
`187`	`187`	`if(m_num_blocks >= cell_block_limit) {`
`188`		`- throw "Agg rendering complexity exceeded.";`
	`188`	`+ /* If this exception is thrown too often, one can`
	`189`	`+ increase cell_block_limit */`
	`190`	`+ throw "Agg rendering complexity exceeded. "`
	`191`	`+ "Consider downsampling or decimating your data.";`
`189`	`192`	`}`
`190`	`193`	`allocate_block();`
`191`	`194`	`}`