mesa: add support for ARB_sample_locations

Signed-off-by: Rhys Perry <[email protected]>
Reviewed-by: Brian Paul <[email protected]> (v2)
Reviewed-by: Marek Olšák <[email protected]> (v2)

1 files changed, 18 insertions, 0 deletions

diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index dfe6a371427..f93a18832da 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -101,6 +101,24 @@ _mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat * val)
       return;
    }
 
+   case GL_PROGRAMMABLE_SAMPLE_LOCATION_ARB:
+      if (!ctx->Extensions.ARB_sample_locations) {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
+         return;
+      }
+
+      if (index >= MAX_SAMPLE_LOCATION_TABLE_SIZE * 2) {
+         _mesa_error( ctx, GL_INVALID_VALUE, "glGetMultisamplefv(index)" );
+         return;
+      }
+
+      if (ctx->DrawBuffer->SampleLocationTable)
+         *val = ctx->DrawBuffer->SampleLocationTable[index];
+      else
+         *val = 0.5f;
+
+      return;
+
    default:
       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
       return;