disable shader permutations that fell back to software fragment shader (software...

[xonotic/darkplaces.git] / gl_backend.c

diff --git a/gl_backend.c b/gl_backend.c
index ff102b3edc0b934fadf20132fcab09c4f226d6cf..9d6c66dc1d362c00d0aa766c90524b7343c567b1 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -832,7 +832,17 @@ unsigned int GL_Backend_CompileProgram(int vertexstrings_count, const char **ver
        qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);
        qglGetInfoLogARB(programobject, sizeof(compilelog), NULL, compilelog);
        if (compilelog[0])
+       {
                Con_Printf("program link log:\n%s\n", compilelog);
+               // software vertex shader is ok but software fragment shader is WAY
+               // too slow, fail program if so.
+               // NOTE: this string might be ATI specific, but that's ok because the
+               // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
+               // software fragment shader due to low instruction and dependent
+               // texture limits.
+               if (!strstr(compilelog, "fragment shader will run in software"))
+                       programlinked = false;
+       }
        CHECKGLERROR
        if (!programlinked)
        {