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linker: Generate link errors when ES shaders are missing stages 

ES requires that a vertex shader and a fragment shader be present.

Fixes bugzilla #32214.
This commit is contained in:
Ian Romanick 2011-02-03 17:10:14 -08:00
parent 425ba19832
commit ce9171f9d8
1 changed files with 14 additions and 0 deletions
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14
src/glsl/linker.cpp
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@ -1682,6 +1682,20 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
demote_shader_inputs_and_outputs(sh, ir_var_in);
}
/* OpenGL ES requires that a vertex shader and a fragment shader both be
* present in a linked program. By checking for use of shading language
* version 1.00, we also catch the GL_ARB_ES2_compatibility case.
*/
if (ctx->API == API_OPENGLES2 || prog->Version == 100) {
if (prog->_LinkedShaders[MESA_SHADER_VERTEX] == NULL) {
linker_error_printf(prog, "program lacks a vertex shader\n");
prog->LinkStatus = false;
} else if (prog->_LinkedShaders[MESA_SHADER_FRAGMENT] == NULL) {
linker_error_printf(prog, "program lacks a fragment shader\n");
prog->LinkStatus = false;
}
}
/* FINISHME: Assign fragment shader output locations. */
done: