Mesa (master): mesa: use GL_RGBA16_SNORM for accum buffer

[Brian Paul]

Module: Mesa
Branch: master
Commit: 8ea614832d62554ada44d0a0ef7dc96ec9a8f154
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8ea614832d62554ada44d0a0ef7dc96ec9a8f154

Author: Brian Paul <brianp at vmware.com>
Date:   Sun May  9 18:42:14 2010 -0600

mesa: use GL_RGBA16_SNORM for accum buffer

---

 src/mesa/main/fbobject.c     |    1 +
 src/mesa/main/renderbuffer.c |    3 ++-
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 201a023..2376e7f 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -887,6 +887,7 @@ _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
    case GL_RGB10_A2:
    case GL_RGBA12:
    case GL_RGBA16:
+   case GL_RGBA16_SNORM:
       return GL_RGBA;
    case GL_STENCIL_INDEX:
    case GL_STENCIL_INDEX1_EXT:
diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c
index b0e1476..adc1199 100644
--- a/src/mesa/main/renderbuffer.c
+++ b/src/mesa/main/renderbuffer.c
@@ -986,6 +986,7 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       pixelSize = 4 * sizeof(GLubyte);
       break;
    case GL_RGBA16:
+   case GL_RGBA16_SNORM:
       /* for accum buffer */
       rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
       rb->DataType = GL_SHORT;
@@ -1756,7 +1757,7 @@ _mesa_add_accum_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
    }
 
    rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
-   rb->InternalFormat = GL_RGBA16;
+   rb->InternalFormat = GL_RGBA16_SNORM;
    rb->AllocStorage = _mesa_soft_renderbuffer_storage;
    _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb);