diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2000-09-14 23:13:51 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2000-09-14 23:13:51 +0000 |
| commit | 64a23a0f9c6a08f6118f6488c191a079c43245a2 (patch) | |
| tree | dd1a4220c65492a7ae7e37166144cf47185e9cb8 | |
| parent | 23316033db12a4d0df10a7d9dbe51b409856a3ac (diff) | |
updated comments
| -rw-r--r-- | src/mesa/main/dd.h | 9 | ||||
| -rw-r--r-- | src/mesa/main/image.c | 9 |
2 files changed, 13 insertions, 5 deletions
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h index 68982004a2..0341c50acc 100644 --- a/src/mesa/main/dd.h +++ b/src/mesa/main/dd.h @@ -1,4 +1,4 @@ -/* $Id: dd.h,v 1.31 2000/09/08 21:44:55 brianp Exp $ */ +/* $Id: dd.h,v 1.32 2000/09/14 23:13:51 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -856,8 +856,11 @@ struct dd_function_table { void (*RegisterVB)( struct vertex_buffer *VB ); void (*UnregisterVB)( struct vertex_buffer *VB ); - /* Do any processing (eg allocate memory) required to set up a new - * vertex_buffer. + /* When Mesa creates a new vertex buffer it calls Driver.RegisterVB() + * so the device driver can allocate its own vertex buffer data and + * hook it to the VB->driver_data pointer. + * When Mesa destroys a vertex buffer it calls Driver.UnegisterVB() + * so the driver can deallocate its own data attached to VB->driver_data. */ diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index 4b08c065c4..2d4f3014e2 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -1,4 +1,4 @@ -/* $Id: image.c,v 1.40 2000/09/12 21:10:25 brianp Exp $ */ +/* $Id: image.c,v 1.41 2000/09/14 23:13:51 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -63,6 +63,11 @@ const struct gl_pixelstore_attrib _mesa_native_packing = { /* * Flip the 8 bits in each byte of the given array. + * + * XXX try this trick to flip bytes someday: + * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555); + * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333); + * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f); */ static void flip_bytes( GLubyte *p, GLuint n ) @@ -70,7 +75,7 @@ flip_bytes( GLubyte *p, GLuint n ) register GLuint i, a, b; for (i=0;i<n;i++) { - b = (GLuint) p[i]; + b = (GLuint) p[i]; /* words are often faster than bytes */ a = ((b & 0x01) << 7) | ((b & 0x02) << 5) | ((b & 0x04) << 3) | |