More texture image changes.

1. Added ctx->Driver.ChooseTextureFormat() function.  Examines user's
   internalFormat, format, type params and returns a gl_texture_format.
2. _mesa_store_teximage[123]d() calls ctx->Driver.ChooseTextureFormat(),
   allocates storage and transfers the image into the desired format.
3. _mesa_transfer_teximage() now takes a gl_texture_format to describe
   the destination format.  Any combination of input format/type and
   output gl_texture_format is accepted.  Uses optimized _mesa_convert_-
   texsubimage[123]d() functions when possible.
3. DRI driver's TexImage[123]D functions should be a lot simpler now.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 469f2363cb7..e69ad2d740f 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -1,4 +1,4 @@
-/* $Id: dd.h,v 1.60 2001/03/22 00:36:27 gareth Exp $ */
+/* $Id: dd.h,v 1.61 2001/04/04 21:54:20 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -170,6 +170,14 @@ struct dd_function_table {
    /***
     *** Texture image functions:
     ***/
+   const struct gl_texture_format *
+   (*ChooseTextureFormat)( GLcontext *ctx, GLint internalFormat,
+                           GLenum srcFormat, GLenum srcType );
+   /* This is called by the _mesa_store_tex[sub]image[123]d() fallback
+    * functions.  The driver should examine <internalFormat> and return a
+    * pointer to an appropriate gl_texture_format.
+    */
+
    void (*TexImage1D)( GLcontext *ctx, GLenum target, GLint level,
                        GLint internalFormat,
                        GLint width, GLint border,