mesa: add API/extension checks for 3-component texture buffer formats

The GL_RGB32F, GL_RGB32UI and GL_RGB32I texture buffer formats are
only supposed to be allowed if the GL_ARB_texture_buffer_object_rgb32
extension is supported.  Note that the texture buffer extensions
require a core profile.  This patch adds those checks.

Fixes the soon-to-be-added
arb_clear_buffer_object-negative-bad-internalformat piglit test.

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 6bcabd3275a0137ca2f8ac1648a73c9b36207d04..211fc798701176ad3e211fca008e6adbbe26b7f7 100644 (file)
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -3967,6 +3967,20 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
       }
    }
 
+   if (ctx->API == API_OPENGL_CORE &&
+       ctx->Extensions.ARB_texture_buffer_object_rgb32) {
+      switch (internalFormat) {
+      case GL_RGB32F:
+         return MESA_FORMAT_RGB_FLOAT32;
+      case GL_RGB32UI:
+         return MESA_FORMAT_RGB_UINT32;
+      case GL_RGB32I:
+         return MESA_FORMAT_RGB_INT32;
+      default:
+         break;
+      }
+   }
+
    switch (internalFormat) {
    case GL_RGBA8:
       return MESA_FORMAT_RGBA8888_REV;
@@ -4031,13 +4045,6 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
    case GL_R32UI:
       return MESA_FORMAT_R_UINT32;
 
-   case GL_RGB32F:
-      return MESA_FORMAT_RGB_FLOAT32;
-   case GL_RGB32UI:
-      return MESA_FORMAT_RGB_UINT32;
-   case GL_RGB32I:
-      return MESA_FORMAT_RGB_INT32;
-
    default:
       return MESA_FORMAT_NONE;
    }