draw/gs: Correctly iterate the emitted primitives

We were assuming that each emitted primitive had the same
number of vertices. That is incorrect. Emitted primitives
can have arbirtrary number of vertices. Simply increment
index on iteration to fix it.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>

diff --git a/src/gallium/auxiliary/draw/draw_gs.c b/src/gallium/auxiliary/draw/draw_gs.c
index 99335af12d31d424449ccf36999b5ad263828d6e..e605965fd87c4ba53f80f47f019ed11bf111c22d 100644 (file)
--- a/src/gallium/auxiliary/draw/draw_gs.c
+++ b/src/gallium/auxiliary/draw/draw_gs.c
@@ -172,6 +172,7 @@ draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
 {
    struct tgsi_exec_machine *machine = shader->machine;
    unsigned prim_idx, j, slot;
+   unsigned current_idx = 0;
    float (*output)[4];
 
    output = *p_output;
@@ -184,9 +185,8 @@ draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
       shader->primitive_lengths[prim_idx +   shader->emitted_primitives] =
          machine->Primitives[prim_idx];
       shader->emitted_vertices += num_verts_per_prim;
-      for (j = 0; j < num_verts_per_prim; j++) {
-         int idx = (prim_idx * num_verts_per_prim + j) *
-                   shader->info.num_outputs;
+      for (j = 0; j < num_verts_per_prim; j++, current_idx++) {
+         int idx = current_idx * shader->info.num_outputs;
 #ifdef DEBUG_OUTPUTS
          debug_printf("%d) Output vert:\n", idx / shader->info.num_outputs);
 #endif
@@ -208,7 +208,7 @@ draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
       }
    }
    *p_output = output;
-         shader->emitted_primitives += num_primitives;
+   shader->emitted_primitives += num_primitives;
 }
 
 /*#define DEBUG_INPUTS 1*/