- qglGetQueryObjectivARB(rtlight->corona_queryindex_visiblepixels, GL_QUERY_RESULT_ARB, &visiblepixels);
- qglGetQueryObjectivARB(rtlight->corona_queryindex_allpixels, GL_QUERY_RESULT_ARB, &allpixels);
+ // See if we can use the GPU-side method to prevent implicit sync
+ if (vid.support.arb_query_buffer_object) {
+#define BUFFER_OFFSET(i) ((void*)NULL + (i))
+ if (!r_shadow_occlusion_buf) {
+ qglGenBuffersARB(1, &r_shadow_occlusion_buf);
+ qglBindBufferARB(GL_QUERY_BUFFER_ARB, r_shadow_occlusion_buf);
+ qglBufferDataARB(GL_QUERY_BUFFER_ARB, 8, NULL, GL_DYNAMIC_COPY);
+ } else {
+ qglBindBufferARB(GL_QUERY_BUFFER_ARB, r_shadow_occlusion_buf);
+ }
+ qglGetQueryObjectivARB(rtlight->corona_queryindex_visiblepixels, GL_QUERY_RESULT_ARB, BUFFER_OFFSET(0));
+ qglGetQueryObjectivARB(rtlight->corona_queryindex_allpixels, GL_QUERY_RESULT_ARB, BUFFER_OFFSET(4));
+ qglBindBufferBase(GL_UNIFORM_BUFFER, 0, r_shadow_occlusion_buf);
+ occlude = MATERIALFLAG_OCCLUDE;
+ } else {
+ qglGetQueryObjectivARB(rtlight->corona_queryindex_visiblepixels, GL_QUERY_RESULT_ARB, &visiblepixels);
+ qglGetQueryObjectivARB(rtlight->corona_queryindex_allpixels, GL_QUERY_RESULT_ARB, &allpixels);
+ if (visiblepixels < 1 || allpixels < 1)
+ return;
+ rtlight->corona_visibility *= bound(0, (float)visiblepixels / (float)allpixels, 1);
+ }
+ cscale *= rtlight->corona_visibility;