renderer: avoid overhead of constantly setting negative viewport uniform

This seems to remove some cpu overheads here.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
macos/master
Dave Airlie 6 years ago
parent 69d7f802b7
commit e07534645b
  1. 7
      src/vrend_renderer.c

@ -285,6 +285,7 @@ struct vrend_linked_shader_program {
GLuint *ubo_locs[PIPE_SHADER_TYPES];
GLuint vs_ws_adjust_loc;
float viewport_neg_val;
GLint fs_stipple_loc;
@ -3962,7 +3963,11 @@ int vrend_draw_vbo(struct vrend_context *ctx,
fprintf(stderr,"illegal VE setup - skipping renderering\n");
return 0;
}
glUniform1f(ctx->sub->prog->vs_ws_adjust_loc, ctx->sub->viewport_is_negative ? -1.0 : 1.0);
float viewport_neg_val = ctx->sub->viewport_is_negative ? -1.0 : 1.0;
if (ctx->sub->prog->viewport_neg_val != viewport_neg_val) {
glUniform1f(ctx->sub->prog->vs_ws_adjust_loc, viewport_neg_val);
ctx->sub->prog->viewport_neg_val = viewport_neg_val;
}
if (ctx->sub->rs_state.clip_plane_enable) {
for (i = 0 ; i < 8; i++) {

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