From: Chad Versace <chad.vers...@intel.com>
Valid values for INTEL_USE_HIZ are "0" or "1".
Overriding HiZ is useful for performance profiling and testing.
Signed-off-by: Chad Versace <chad.vers...@intel.com>
---
src/mesa/drivers/dri/intel/intel_context.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/intel/intel_context.c
b/src/mesa/drivers/dri/intel/intel_context.c
index 07ce8de..940478a 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -609,6 +609,29 @@ intelInitDriverFunctions(struct dd_function_table
*functions)
intel_init_syncobj_functions(functions);
}
+/**
+ * \brief Override intel->use_hiz with environment variable INTEL_USE_HIZ.
+ *
+ * Valid values for INTEL_USE_HIZ are "0" and "1". If an invalid valid value
+ * is encountered, an error is emitted and INTEL_USE_HIZ is ignored.
+ */
+static void
+intel_override_hiz(struct intel_context *intel)
+{
+ const char *s = getenv("INTEL_USE_HIZ");
+ if (!s) {
+ return;
+ } else if (!strcmp("0", s)) {
+ intel->use_hiz = false;
+ } else if (!strcmp("1", s)) {
+ intel->use_hiz = true;
+ } else {
+ _mesa_warning(&intel->ctx,
+ "env variable INTEL_USE_HIZ=\"%s\" has invalid value and "
+ "is ignored", s);
+ }
+}
+
GLboolean
intelInitContext(struct intel_context *intel,
@@ -677,6 +700,7 @@ intelInitContext(struct intel_context *intel,
/* FINISHME: When HiZ implementation is complete, enable it for Gen >= 5. */
intel->use_hiz = false;
+ intel_override_hiz(intel);
memset(&ctx->TextureFormatSupported, 0,
sizeof(ctx->TextureFormatSupported));
--
1.7.4.2
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