[Mesa-dev] [RFC 07/63] mesa/multisample: Check sample count using the new driver hook

[Eduardo Lima Mitev]

Use QueryInternalFormat instead of QuerySamplesForFormat to obtain the
highest supported sample. QuerySamplesForFormat is to be removed.
---
 src/mesa/main/multisample.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index e7783ea..56aa5c3 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -174,10 +174,12 @@ _mesa_check_sample_count(struct gl_context *ctx, GLenum target,
     * for <internalformat> then the error INVALID_OPERATION is generated."
     */
    if (ctx->Extensions.ARB_internalformat_query) {
-      GLint buffer[16];
-      int count = ctx->Driver.QuerySamplesForFormat(ctx, target,
-                                                    internalFormat, buffer);
-      int limit = count ? buffer[0] : -1;
+      GLint buffer[16] = {-1};
+      ctx->Driver.QueryInternalFormat(ctx, target, internalFormat,
+                                      GL_SAMPLES, buffer);
+      /* since the query returns samples sorted in descending order,
+       * the first element is the greatest supported sample value */
+      int limit = buffer[0];
 
       return samples > limit ? GL_INVALID_OPERATION : GL_NO_ERROR;
    }
-- 
2.5.3