Better way to request features for different GLSL versions

[libs/gl.git] / source / glsl / features.cpp

diff --git a/source/glsl/features.cpp b/source/glsl/features.cpp
index 73c95b0fd3cf9248c1499c4e9c129382eb4b9912..0b5b438b6b1acffc21649742eed47b9f22e57ce7 100644 (file)
--- a/source/glsl/features.cpp
+++ b/source/glsl/features.cpp
@@ -46,22 +46,31 @@ Features Features::from_context()
        return features;
 }
 
-Features Features::all()
+Features Features::from_version(const Version &ver)
 {
        Features features;
        features.gl_api = OPENGL;
-       features.glsl_version = Version(4, 60);
-       features.arb_enhanced_layouts = true;
-       features.arb_explicit_attrib_location = true;
-       features.arb_explicit_uniform_location = true;
-       features.arb_gpu_shader5 = true;
-       features.arb_separate_shader_objects = true;
-       features.arb_uniform_buffer_object = true;
-       features.ext_gpu_shader4 = true;
-       features.ext_texture_array = true;
+       features.glsl_version = ver;
+       features.arb_enhanced_layouts = (ver>=Version(4, 40));
+       features.arb_explicit_attrib_location = (ver>=Version(1, 30));
+       features.arb_explicit_uniform_location = (ver>=Version(4, 30));
+       features.arb_gpu_shader5 = (ver>=Version(4, 0));
+       features.arb_separate_shader_objects = (ver>=Version(4, 10));
+       features.arb_uniform_buffer_object = (ver>=Version(1, 50));
+       features.ext_gpu_shader4 = (ver>=Version(1, 20));
+       features.ext_texture_array = (ver>=Version(1, 30));
+       features.uniform_binding_range = (ver>=Version(4, 30) ? 84 : ver>=Version(4, 0) ? 60 :
+               ver>=Version(3, 30) ? 36 : 24);
+       features.texture_binding_range = (ver>=Version(4, 30) ? 96 : ver>=Version(4, 0) ? 80 :
+               ver>=Version(1, 50) ? 48 : ver>=Version(1, 40) ? 32 : 16);
        return features;
 }
 
+Features Features::latest()
+{
+       return from_version(Version(4, 60));
+}
+
 } // namespace SL
 } // namespace GL
 } // namespace Msp