swrast: add RGTC support

diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 7504b8a..310740b 100644 (file)
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -428,6 +428,7 @@ _mesa_enable_sw_extensions(struct gl_context *ctx)
    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
    ctx->Extensions.ARB_texture_rg = GL_TRUE;
+   ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 #if FEATURE_ARB_vertex_program
    ctx->Extensions.ARB_vertex_program = GL_TRUE;

diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index 2542cea..72025cf 100644 (file)
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -602,6 +602,25 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
       }
    }
 
+   if (ctx->Extensions.ARB_texture_compression_rgtc) {
+      switch (internalFormat) {
+         case GL_COMPRESSED_RED_RGTC1:
+           RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
+           break;
+         case GL_COMPRESSED_SIGNED_RED_RGTC1:
+           RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RED_RGTC1);
+           break;
+         case GL_COMPRESSED_RG_RGTC2:
+           RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
+           break;
+         case GL_COMPRESSED_SIGNED_RG_RGTC2:
+           RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_RGTC2);
+           break;
+         default:
+            ; /* fallthrough */
+      }
+   }
+
    _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
    return MESA_FORMAT_NONE;
 }