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-rw-r--r--src/mesa/drivers/dri/tdfx/tdfx_context.c2
-rw-r--r--src/mesa/drivers/dri/tdfx/tdfx_dd.c54
2 files changed, 55 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/tdfx/tdfx_context.c b/src/mesa/drivers/dri/tdfx/tdfx_context.c
index 5ac1fb5986..e9c07bd862 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_context.c
+++ b/src/mesa/drivers/dri/tdfx/tdfx_context.c
@@ -60,6 +60,7 @@
#define need_GL_ARB_multisample
/* #define need_GL_ARB_point_parameters */
+#define need_GL_ARB_occlusion_query
#define need_GL_ARB_texture_compression
#define need_GL_ARB_vertex_buffer_object
/* #define need_GL_ARB_vertex_program */
@@ -82,6 +83,7 @@
const struct dri_extension card_extensions[] =
{
{ "GL_ARB_multisample", GL_ARB_multisample_functions },
+ { "GL_ARB_occlusion_query", GL_ARB_occlusion_query_functions },
{ "GL_ARB_texture_mirrored_repeat", NULL },
{ "GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions },
diff --git a/src/mesa/drivers/dri/tdfx/tdfx_dd.c b/src/mesa/drivers/dri/tdfx/tdfx_dd.c
index b55af8571e..adbe0c0f33 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_dd.c
+++ b/src/mesa/drivers/dri/tdfx/tdfx_dd.c
@@ -38,6 +38,7 @@
#include "tdfx_vb.h"
#include "tdfx_pixels.h"
+#include "utils.h"
#include "context.h"
#include "enums.h"
#include "framebuffer.h"
@@ -108,6 +109,55 @@ static const GLubyte *tdfxDDGetString( GLcontext *ctx, GLenum name )
}
+static void
+tdfxBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+
+ (void) q;
+
+ if (target == GL_SAMPLES_PASSED_ARB) {
+ LOCK_HARDWARE(fxMesa);
+ fxMesa->Glide.grFinish();
+ fxMesa->Glide.grReset(GR_STATS_PIXELS);
+ UNLOCK_HARDWARE(fxMesa);
+ }
+}
+
+
+static void
+tdfxEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+ tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+ FxI32 total_pixels;
+ FxI32 z_fail_pixels;
+
+
+ if (target == GL_SAMPLES_PASSED_ARB) {
+ LOCK_HARDWARE(fxMesa);
+ fxMesa->Glide.grFinish();
+
+ fxMesa->Glide.grGet(GR_STATS_PIXELS_DEPTHFUNC_FAIL, sizeof(FxI32),
+ &z_fail_pixels);
+ fxMesa->Glide.grGet(GR_STATS_PIXELS_IN, sizeof(FxI32), &total_pixels);
+
+ q->Result = total_pixels - z_fail_pixels;
+
+ /* Apparently, people have seen z_fail_pixels > total_pixels under
+ * some conditions on some 3Dfx hardware. The occlusion query spec
+ * requires that we clamp to 0.
+ */
+ if (q->Result < 0) {
+ q->Result = 0;
+ }
+
+ q->Ready = GL_TRUE;
+
+ UNLOCK_HARDWARE(fxMesa);
+ }
+}
+
+
#define VISUAL_EQUALS_RGBA(vis, r, g, b, a) \
((vis->redBits == r) && \
(vis->greenBits == g) && \
@@ -121,7 +171,9 @@ void tdfxDDInitDriverFuncs( const __GLcontextModes *visual,
fprintf( stderr, "tdfx: %s()\n", __FUNCTION__ );
}
- functions->GetString = tdfxDDGetString;
+ functions->GetString = tdfxDDGetString;
+ functions->BeginQuery = tdfxBeginQuery;
+ functions->EndQuery = tdfxEndQuery;
/* Accelerated paths
*/