diff options
Diffstat (limited to 'gl.c')
| -rw-r--r-- | gl.c | 24 |
1 files changed, 19 insertions, 5 deletions
@@ -77,10 +77,26 @@ static void gl_get_procs(void) { #undef gl_get_proc } +static GLuint glsl_version(void) { + int v = gl_version_major * 100 + gl_version_minor * 10; + switch (v) { + case 200: return 110; + case 210: return 120; + } + // don't go above 130. i don't want to write two different shaders one using varying and one using whatever new stuff GLSL has these days + return 130; +} + // compile a GLSL shader static GLuint gl_compile_shader(char error_buf[256], char const *code, GLenum shader_type) { GLuint shader = glCreateShader(shader_type); - glShaderSource(shader, 1, &code, NULL); + char header[32]; + strbuf_printf(header, "#version %u\n#line 1\n", glsl_version()); + const char *sources[2] = { + header, + code + }; + glShaderSource(shader, 2, sources, NULL); glCompileShader(shader); GLint status = 0; glGetShaderiv(shader, GL_COMPILE_STATUS, &status); @@ -171,8 +187,7 @@ static GLuint gl_geometry_v_color; static GLuint gl_geometry_vbo, gl_geometry_vao; static void gl_geometry_init(void) { - char const *vshader_code = "#version 110\n\ - attribute vec2 v_pos;\n\ + char const *vshader_code = "attribute vec2 v_pos;\n\ attribute vec4 v_color;\n\ varying vec4 color;\n\ void main() {\n\ @@ -180,8 +195,7 @@ static void gl_geometry_init(void) { color = v_color;\n\ }\n\ "; - char const *fshader_code = "#version 110\n\ - varying vec4 color;\n\ + char const *fshader_code = "varying vec4 color;\n\ void main() {\n\ gl_FragColor = color;\n\ }\n\ |