Use the invariant keyword on gl_Position on GLSL 1.20 or higher and GLSL ES

[xonotic/darkplaces.git] / gl_rmain.c

diff --git a/gl_rmain.c b/gl_rmain.c
index 92e0d76c4e8fab5350a0d5eb77815dac2ad8f003..6a316432495af90663d7c35e9fc3795caa040d0a 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -1115,6 +1115,27 @@ static void R_GLSL_CompilePermutation(r_glsl_permutation_t *p, unsigned int mode
                geomstrings_list[geomstrings_count++] = "#define GLSL130\n";
                fragstrings_list[fragstrings_count++] = "#define GLSL130\n";
        }
+       // if we can do #version 120, we should (this adds the invariant keyword)
+       else if(vid.support.glshaderversion >= 120)
+       {
+               vertstrings_list[vertstrings_count++] = "#version 120\n";
+               geomstrings_list[geomstrings_count++] = "#version 120\n";
+               fragstrings_list[fragstrings_count++] = "#version 120\n";
+               vertstrings_list[vertstrings_count++] = "#define GLSL120\n";
+               geomstrings_list[geomstrings_count++] = "#define GLSL120\n";
+               fragstrings_list[fragstrings_count++] = "#define GLSL120\n";
+       }
+       // GLES also adds several things from GLSL120
+       switch(vid.renderpath)
+       {
+       case RENDERPATH_GLES2:
+               vertstrings_list[vertstrings_count++] = "#define GLES\n";
+               geomstrings_list[geomstrings_count++] = "#define GLES\n";
+               fragstrings_list[fragstrings_count++] = "#define GLES\n";
+               break;
+       default:
+               break;
+       }
 
        // the first pretext is which type of shader to compile as
        // (later these will all be bound together as a program object)