src/mesa/pipe/softpipe/sp_context.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * 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
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Authors:  Keith Whitwell <keith@tungstengraphics.com>
  29  */
  30
  31 #ifndef G_CONTEXT_H
  32 #define G_CONTEXT_H
  33
  34 #include "glheader.h"
  35
  36 #include "pipe/p_state.h"
  37 #include "pipe/p_context.h"
  38
  39 #include "sp_quad.h"
  40
  41
  42 struct softpipe_surface;
  43 struct draw_context;
  44 struct prim_stage;
  45
  46
  47 enum interp_mode {
  48    INTERP_CONSTANT,
  49    INTERP_LINEAR,
  50    INTERP_PERSPECTIVE
  51 };
  52
  53
  54 #define G_NEW_VIEWPORT  0x1
  55 #define G_NEW_SETUP     0x2
  56 #define G_NEW_FS        0x4
  57 #define G_NEW_BLEND     0x8
  58 #define G_NEW_POINT     0x10
  59 #define G_NEW_CLIP      0x20
  60 #define G_NEW_SCISSOR   0x40
  61 #define G_NEW_STIPPLE   0x80
  62 #define G_NEW_FRAMEBUFFER 0x100
  63 #define G_NEW_ALPHA_TEST  0x200
  64 #define G_NEW_DEPTH_TEST  0x400
  65
  66
  67 #define PIPE_ATTRIB_MAX 32
  68
  69 struct softpipe_context {
  70    struct pipe_context pipe;
  71
  72
  73    /* The most recent drawing state as set by the driver:
  74     */
  75    struct pipe_framebuffer_state framebuffer;
  76    struct pipe_viewport     viewport;
  77    struct pipe_setup_state  setup;
  78    struct pipe_fs_state     fs;
  79    struct pipe_blend_state  blend;
  80    struct pipe_alpha_test_state alpha_test;
  81    struct pipe_clip_state   clip;
  82    struct pipe_clear_color_state   clear_color;
  83    struct pipe_depth_state depth_test;
  84    struct pipe_point_state  point;
  85    struct pipe_scissor_rect scissor;
  86    struct pipe_poly_stipple poly_stipple;
  87    GLuint dirty;
  88
  89    /* Clip derived state:
  90     */
  91    GLfloat plane[12][4];
  92    GLuint nr_planes;
  93
  94    /* Setup derived state.  TODO: this should be passed in the program
  95     * tokens as parameters to DECL instructions.
  96     *
  97     * For now we just set colors to CONST on flatshade, textures to
  98     * perspective always and everything else to linear.
  99     */
 100    enum interp_mode interp[PIPE_ATTRIB_MAX];
 101
 102
 103    /* FS + setup derived state:
 104     */
 105    GLuint fp_attr_to_slot[PIPE_ATTRIB_MAX];
 106    GLuint vf_attr_to_slot[PIPE_ATTRIB_MAX];
 107    GLuint nr_attrs;
 108    GLuint nr_frag_attrs;
 109    GLuint attr_mask;
 110
 111    GLboolean need_z;
 112    GLboolean need_w;
 113
 114    /* Stipple derived state:
 115     */
 116    GLubyte stipple_masks[16][16];
 117
 118
 119    /* The software clipper/setup engine.
 120     */
 121    struct {
 122       struct prim_stage *setup;
 123       struct prim_stage *unfilled;
 124       struct prim_stage *twoside;
 125       struct prim_stage *clip;
 126       struct prim_stage *flatshade;
 127       struct prim_stage *offset;
 128       struct prim_stage *cull;
 129
 130       struct prim_stage *first;
 131
 132       GLenum prim;
 133       GLuint vertex_size;
 134    } prim;
 135
 136    /*
 137     * Software quad rendering pipeline
 138     */
 139    struct {
 140       struct quad_stage *shade;
 141       struct quad_stage *depth_test;
 142       struct quad_stage *blend;
 143       struct quad_stage *output;
 144
 145       struct quad_stage *first; /**< points to one of the above stages */
 146    } quad;
 147
 148    /* Temp kludge:
 149     */
 150    struct draw_context *draw;
 151 };
 152
 153
 154
 155
 156 static INLINE struct softpipe_context *
 157 softpipe_context( struct pipe_context *pipe )
 158 {
 159    return (struct softpipe_context *)pipe;
 160 }
 161
 162
 163 #endif