src/mesa/swrast/s_span.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef S_SPAN_H
  27 #define S_SPAN_H
  28
  29
  30 #include "mtypes.h"
  31 #include "swrast.h"
  32
  33
  34 extern void
  35 _swrast_span_default_z( GLcontext *ctx, struct sw_span *span );
  36
  37 extern void
  38 _swrast_span_interpolate_z( const GLcontext *ctx, struct sw_span *span );
  39
  40 extern void
  41 _swrast_span_default_fog( GLcontext *ctx, struct sw_span *span );
  42
  43 extern void
  44 _swrast_span_default_color( GLcontext *ctx, struct sw_span *span );
  45
  46 extern void
  47 _swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *span );
  48
  49 extern GLfloat
  50 _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
  51                        GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
  52                        GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
  53
  54 extern void
  55 _swrast_write_index_span( GLcontext *ctx, struct sw_span *span);
  56
  57
  58 extern void
  59 _swrast_write_rgba_span( GLcontext *ctx, struct sw_span *span);
  60
  61
  62 extern void
  63 _swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb,
  64                         GLuint n, GLint x, GLint y, GLchan rgba[][4] );
  65
  66 extern void
  67 _swrast_read_index_span( GLcontext *ctx, struct gl_renderbuffer *rb,
  68                          GLuint n, GLint x, GLint y, GLuint indx[] );
  69
  70 extern void
  71 _swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb,
  72                    GLuint count, const GLint x[], const GLint y[],
  73                    void *values, GLuint valueSize);
  74
  75 extern void
  76 _swrast_put_row(GLcontext *ctx, struct gl_renderbuffer *rb,
  77                 GLuint count, GLint x, GLint y,
  78                 const GLvoid *values, GLuint valueSize);
  79
  80 extern void
  81 _swrast_get_row(GLcontext *ctx, struct gl_renderbuffer *rb,
  82                 GLuint count, GLint x, GLint y,
  83                 GLvoid *values, GLuint valueSize);
  84
  85
  86 extern void *
  87 _swrast_get_dest_rgba(GLcontext *ctx, struct gl_renderbuffer *rb,
  88                       struct sw_span *span);
  89
  90 #endif