src/mesa/swrast/s_span.h

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  5.1
   5  *
   6  * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #ifndef S_SPAN_H
  28 #define S_SPAN_H
  29
  30
  31 #include "mtypes.h"
  32 #include "swrast.h"
  33
  34
  35 extern void
  36 _swrast_span_default_z( GLcontext *ctx, struct sw_span *span );
  37
  38 extern void
  39 _swrast_span_interpolate_z( const GLcontext *ctx, struct sw_span *span );
  40
  41 extern void
  42 _swrast_span_default_fog( GLcontext *ctx, struct sw_span *span );
  43
  44 extern void
  45 _swrast_span_default_color( GLcontext *ctx, struct sw_span *span );
  46
  47 extern void
  48 _swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *span );
  49
  50 extern GLfloat
  51 _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
  52                      GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
  53                      GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
  54
  55 extern void
  56 _swrast_write_index_span( GLcontext *ctx, struct sw_span *span);
  57
  58
  59 extern void
  60 _swrast_write_rgba_span( GLcontext *ctx, struct sw_span *span);
  61
  62
  63 extern void
  64 _swrast_write_texture_span( GLcontext *ctx, struct sw_span *span);
  65
  66
  67 extern void
  68 _swrast_read_rgba_span( GLcontext *ctx, GLframebuffer *buffer,
  69                       GLuint n, GLint x, GLint y, GLchan rgba[][4] );
  70
  71 extern void
  72 _swrast_read_index_span( GLcontext *ctx, GLframebuffer *buffer,
  73                        GLuint n, GLint x, GLint y, GLuint indx[] );
  74
  75 #endif