diff options
Diffstat (limited to 'src/mesa/main/dd.h')
| -rw-r--r-- | src/mesa/main/dd.h | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h index 7a6d65437d7..2c6ae5ef375 100644 --- a/src/mesa/main/dd.h +++ b/src/mesa/main/dd.h @@ -1,4 +1,4 @@ -/* $Id: dd.h,v 1.8 1999/12/10 19:09:22 brianp Exp $ */ +/* $Id: dd.h,v 1.9 2000/01/06 09:28:07 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -118,6 +118,15 @@ struct gl_pipeline_stage; +/* Mask bits sent to the driver Clear() function */ +#define DD_FRONT_LEFT_BIT FRONT_LEFT_BIT /* 1 */ +#define DD_FRONT_RIGHT_BIT FRONT_RIGHT_BIT /* 2 */ +#define DD_BACK_LEFT_BIT BACK_LEFT_BIT /* 4 */ +#define DD_BACK_RIGHT_BIT BACK_RIGHT_BIT /* 8 */ +#define DD_DEPTH_BIT GL_DEPTH_BUFFER_BIT /* 0x00000100 */ +#define DD_STENCIL_BIT GL_STENCIL_BUFFER_BIT /* 0x00000400 */ +#define DD_ACCUM_BIT GL_ACCUM_BUFFER_BIT /* 0x00000200 */ + /* @@ -161,10 +170,14 @@ struct dd_function_table { GLbitfield (*Clear)( GLcontext *ctx, GLbitfield mask, GLboolean all, GLint x, GLint y, GLint width, GLint height ); /* Clear the color/depth/stencil/accum buffer(s). - * 'mask' indicates which buffers need to be cleared. Return a bitmask - * indicating which buffers weren't cleared by the driver function. - * If 'all' is true then the clear the whole buffer, else clear the - * region defined by (x,y,width,height). + * 'mask' is a bitmask of the DD_*_BIT values defined above that indicates + * which buffers need to be cleared. The driver should clear those + * buffers then return a new bitmask indicating which buffers should be + * cleared by software Mesa. + * If 'all' is true then the clear the whole buffer, else clear only the + * region defined by (x,y,width,height). + * This function must obey the glColorMask, glIndexMask and glStencilMask + * settings! Software Mesa can do masked clears if the device driver can't. */ void (*Index)( GLcontext *ctx, GLuint index ); |