[Mesa-dev] [PATCH 34/34] main: Warn that geometry shader support is experimental.

[Paul Berry]

Geometry shader support in the Mesa front end is still fairly
preliminary.  Many features are untested, and the following things are
known not to work:

- The gl_in interface block
- The gl_ClipDistance input
- Transform feedback of geometry shader outputs
- Constants that are new in GLSL 1.50 (e.g. gl_MaxGeometryInputComponents)

This isn't a problem, since no back-end drivers currently enable
geometry shaders.  However, to make sure no one gets the wrong
impression, emit a nasty warning to let the user know that geometry
shader support isn't complete.
---
 src/mesa/main/shaderapi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 0eb90aa..7240aba 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -740,6 +740,12 @@ compile_shader(struct gl_context *ctx, GLuint shaderObj)
    if (!sh)
       return;
 
+   /* Geometry shaders are not yet fully supported, so issue a warning message
+    * if we're compiling one.
+    */
+   if (sh->Type == GL_GEOMETRY_SHADER)
+      printf("WARNING: Geometry shader support is currently experimental.\n");
+
    options = &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(sh->Type)];
 
    /* set default pragma state for shader */
-- 
1.8.3.4