Mesa (master): st: add support for GL_EXT_vertex_array_bgra

[Brian Paul]

Module: Mesa
Branch: master
Commit: 5b27b4ad37bd992d2d3a6fd9d407277113544f30
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5b27b4ad37bd992d2d3a6fd9d407277113544f30

Author: Brian Paul <brianp at vmware.com>
Date:   Thu May 21 08:15:22 2009 -0600

st: add support for GL_EXT_vertex_array_bgra

---

 src/mesa/state_tracker/st_draw.c          |   13 ++++++++++++-
 src/mesa/state_tracker/st_draw.h          |    3 ++-
 src/mesa/state_tracker/st_draw_feedback.c |    1 +
 src/mesa/state_tracker/st_extensions.c    |    1 +
 4 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index 225541a..8e03622 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -159,12 +159,21 @@ static GLuint fixed_types[4] = {
  * Return a PIPE_FORMAT_x for the given GL datatype and size.
  */
 GLuint
-st_pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized)
+st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
+                      GLboolean normalized)
 {
    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
           type == GL_FIXED);
    assert(size >= 1);
    assert(size <= 4);
+   assert(format == GL_RGBA || format == GL_BGRA);
+
+   if (format == GL_BGRA) {
+      /* this is an odd-ball case */
+      assert(type == GL_UNSIGNED_BYTE);
+      assert(normalized);
+      return PIPE_FORMAT_B8G8R8A8_UNORM;
+   }
 
    if (normalized) {
       switch (type) {
@@ -392,6 +401,7 @@ setup_interleaved_attribs(GLcontext *ctx,
       velements[attr].src_format =
          st_pipe_vertex_format(arrays[mesaAttr]->Type,
                                arrays[mesaAttr]->Size,
+                               arrays[mesaAttr]->Format,
                                arrays[mesaAttr]->Normalized);
       assert(velements[attr].src_format);
    }
@@ -479,6 +489,7 @@ setup_non_interleaved_attribs(GLcontext *ctx,
       velements[attr].src_format
          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
                                  arrays[mesaAttr]->Size,
+                                 arrays[mesaAttr]->Format,
                                  arrays[mesaAttr]->Normalized);
       assert(velements[attr].src_format);
    }
diff --git a/src/mesa/state_tracker/st_draw.h b/src/mesa/state_tracker/st_draw.h
index da04fce..dcfe7e1 100644
--- a/src/mesa/state_tracker/st_draw.h
+++ b/src/mesa/state_tracker/st_draw.h
@@ -62,7 +62,8 @@ st_feedback_draw_vbo(GLcontext *ctx,
 /* Internal function:
  */
 extern GLuint
-st_pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized);
+st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
+                      GLboolean normalized);
 
 
 /**
diff --git a/src/mesa/state_tracker/st_draw_feedback.c b/src/mesa/state_tracker/st_draw_feedback.c
index 32502a9..2712c13 100644
--- a/src/mesa/state_tracker/st_draw_feedback.c
+++ b/src/mesa/state_tracker/st_draw_feedback.c
@@ -178,6 +178,7 @@ st_feedback_draw_vbo(GLcontext *ctx,
       velements[attr].src_format = 
          st_pipe_vertex_format(arrays[mesaAttr]->Type,
                                arrays[mesaAttr]->Size,
+                               arrays[mesaAttr]->Format,
                                arrays[mesaAttr]->Normalized);
       assert(velements[attr].src_format);
 
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index d526dfc..efa88c2 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -167,6 +167,7 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
+   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 
    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;