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glsl/linker: Fail to link geometry shader without vertex shader.

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From section 2.15 (Geometry Shaders) the OpenGL 3.2 spec:

    A program object that includes a geometry shader must also include
    a vertex shader; otherwise a link error will occur.

Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Fabian Bieler 2013-05-24 23:26:54 +02:00 • committed by Paul Berry
parent 8cdbe8394e
commit bd85ba08bc
1 changed files with 8 additions and 0 deletions
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8
src/glsl/linker.cpp
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@ -1690,6 +1690,14 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
prog->Version = max_version;
prog->IsES = is_es_prog;
/* Geometry shaders have to be linked with vertex shaders.
*/
if (num_geom_shaders > 0 && num_vert_shaders == 0) {
linker_error(prog, "Geometry shader must be linked with "
"vertex shader\n");
goto done;
}
for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {
if (prog->_LinkedShaders[i] != NULL)
ctx->Driver.DeleteShader(ctx, prog->_LinkedShaders[i]);