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/* $Id: swrast.h,v 1.11 2001/03/12 00:48:42 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Keith Whitwell <keithw@valinux.com>
*/
#ifndef SWRAST_H
#define SWRAST_H
#include "mtypes.h"
/* The software rasterizer now uses this format for vertices. Thus a
* 'RasterSetup' stage or other translation is required between the
* tnl module and the swrast rasterization functions. This serves to
* isolate the swrast module from the internals of the tnl module, and
* improve its usefulness as a fallback mechanism for hardware
* drivers.
*
* Full software drivers:
* - Register the rastersetup and triangle functions from
* utils/software_helper.
* - On statechange, update the rasterization pointers in that module.
*
* Rasterization hardware drivers:
* - Keep native rastersetup.
* - Implement native twoside,offset and unfilled triangle setup.
* - Implement a translator from native vertices to swrast vertices.
* - On partial fallback (mix of accelerated and unaccelerated
* prims), call a pass-through function which translates native
* vertices to SWvertices and calls the appropriate swrast function.
* - On total fallback (vertex format insufficient for state or all
* primitives unaccelerated), hook in swrast_setup instead.
*/
typedef struct {
GLfloat win[4];
GLfloat texcoord[MAX_TEXTURE_UNITS][4];
GLchan color[4];
GLchan specular[4];
GLfloat fog;
GLuint index;
GLfloat pointSize;
} SWvertex;
/* These are the public-access functions exported from swrast.
*/
extern void
_swrast_alloc_buffers( GLcontext *ctx );
extern GLboolean
_swrast_CreateContext( GLcontext *ctx );
extern void
_swrast_DestroyContext( GLcontext *ctx );
extern void
_swrast_Bitmap( GLcontext *ctx,
GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap );
extern void
_swrast_CopyPixels( GLcontext *ctx,
GLint srcx, GLint srcy,
GLint destx, GLint desty,
GLsizei width, GLsizei height,
GLenum type );
extern void
_swrast_DrawPixels( GLcontext *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels );
extern void
_swrast_ReadPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
GLvoid *pixels );
extern void
_swrast_Clear( GLcontext *ctx, GLbitfield mask, GLboolean all,
GLint x, GLint y, GLint width, GLint height );
extern void
_swrast_Accum( GLcontext *ctx, GLenum op,
GLfloat value, GLint xpos, GLint ypos,
GLint width, GLint height );
/* Reset the stipple counter
*/
extern void
_swrast_ResetLineStipple( GLcontext *ctx );
/* These will always render the correct point/line/triangle for the
* current state.
*
* For flatshaded primitives, the provoking vertex is the final one.
*/
extern void
_swrast_Point( GLcontext *ctx, const SWvertex *v );
extern void
_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 );
extern void
_swrast_Triangle( GLcontext *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2 );
extern void
_swrast_Quad( GLcontext *ctx,
const SWvertex *v0, const SWvertex *v1,
const SWvertex *v2, const SWvertex *v3);
extern void
_swrast_flush( GLcontext *ctx );
/* Tell the software rasterizer about core state changes.
*/
extern void
_swrast_InvalidateState( GLcontext *ctx, GLuint new_state );
/* Configure software rasterizer to match hardware rasterizer characteristics:
*/
extern void
_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value );
extern void
_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value );
/* Debug:
*/
extern void
_swrast_print_vertex( GLcontext *ctx, const SWvertex *v );
#endif
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