summaryrefslogtreecommitdiffstats
path: root/src/gallium/auxiliary/gallivm/lp_bld_sample.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample.c')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_sample.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
index d9fbc0f3057..d9fbbbe70f7 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
@@ -46,6 +46,39 @@
/**
+ * Does the given texture wrap mode allow sampling the texture border color?
+ * XXX maybe move this into gallium util code.
+ */
+boolean
+lp_sampler_wrap_mode_uses_border_color(unsigned mode,
+ unsigned min_img_filter,
+ unsigned mag_img_filter)
+{
+ switch (mode) {
+ case PIPE_TEX_WRAP_REPEAT:
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ case PIPE_TEX_WRAP_MIRROR_REPEAT:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
+ return FALSE;
+ case PIPE_TEX_WRAP_CLAMP:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP:
+ if (min_img_filter == PIPE_TEX_FILTER_NEAREST &&
+ mag_img_filter == PIPE_TEX_FILTER_NEAREST) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
+ return TRUE;
+ default:
+ assert(0 && "unexpected wrap mode");
+ return FALSE;
+ }
+}
+
+
+/**
* Initialize lp_sampler_static_state object with the gallium sampler
* and texture state.
* The former is considered to be static and the later dynamic.