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 SP_CONTEXT_H
  32 #define SP_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 draw_stage;
  45
  46
  47 enum interp_mode {
  48    INTERP_CONSTANT,
  49    INTERP_LINEAR,
  50    INTERP_PERSPECTIVE
  51 };
  52
  53
  54 #define SP_NEW_VIEWPORT      0x1
  55 #define SP_NEW_SETUP         0x2
  56 #define SP_NEW_FS            0x4
  57 #define SP_NEW_BLEND         0x8
  58 #define SP_NEW_CLIP         0x10
  59 #define SP_NEW_SCISSOR      0x20
  60 #define SP_NEW_STIPPLE      0x40
  61 #define SP_NEW_FRAMEBUFFER  0x80
  62 #define SP_NEW_ALPHA_TEST  0x100
  63 #define SP_NEW_DEPTH_TEST  0x200
  64 #define SP_NEW_SAMPLER     0x400
  65 #define SP_NEW_TEXTURE     0x800
  66 #define SP_NEW_STENCIL    0x1000
  67
  68
  69 struct softpipe_context {
  70    struct pipe_context pipe;  /**< base class */
  71
  72    /* The most recent drawing state as set by the driver:
  73     */
  74    struct pipe_alpha_test_state alpha_test;
  75    struct pipe_blend_state blend;
  76    struct pipe_blend_color blend_color;
  77    struct pipe_clear_color_state clear_color;
  78    struct pipe_clip_state clip;
  79    struct pipe_depth_state depth_test;
  80    struct pipe_framebuffer_state framebuffer;
  81    struct pipe_fs_state fs;
  82    struct pipe_poly_stipple poly_stipple;
  83    struct pipe_scissor_state scissor;
  84    struct pipe_sampler_state sampler[PIPE_MAX_SAMPLERS];
  85    struct pipe_setup_state setup;
  86    struct pipe_stencil_state stencil;
  87    struct pipe_texture_object *texture[PIPE_MAX_SAMPLERS];
  88    struct pipe_viewport_state viewport;
  89    GLuint dirty;
  90
  91    /* Setup derived state.  TODO: this should be passed in the program
  92     * tokens as parameters to DECL instructions.
  93     *
  94     * For now we just set colors to CONST on flatshade, textures to
  95     * perspective always and everything else to linear.
  96     */
  97    enum interp_mode interp[PIPE_ATTRIB_MAX];
  98
  99
 100    /* FS + setup derived state:
 101     */
 102
 103    /** Map fragment program attribute to quad/coef array slot */
 104    GLuint fp_attr_to_slot[PIPE_ATTRIB_MAX];
 105    /** Map vertex format attribute to a vertex attribute slot */
 106    GLuint vf_attr_to_slot[PIPE_ATTRIB_MAX];
 107    GLuint nr_attrs;
 108    GLuint nr_frag_attrs;  /**< number of active fragment attribs */
 109    GLbitfield attr_mask;  /**< bitfield of VF_ATTRIB_ indexes/bits */
 110
 111    GLboolean need_z;  /**< produce quad/fragment Z values? */
 112    GLboolean need_w;  /**< produce quad/fragment W values? */
 113
 114 #if 0
 115    /* Stipple derived state:
 116     */
 117    GLubyte stipple_masks[16][16];
 118 #endif
 119
 120    /** Derived from scissor and surface bounds: */
 121    struct pipe_scissor_state cliprect;
 122
 123    GLuint occlusion_counter;
 124
 125    GLuint line_stipple_counter;
 126
 127    /** Software quad rendering pipeline */
 128    struct {
 129       struct quad_stage *polygon_stipple;
 130       struct quad_stage *shade;
 131       struct quad_stage *alpha_test;
 132       struct quad_stage *stencil_test;
 133       struct quad_stage *depth_test;
 134       struct quad_stage *occlusion;
 135       struct quad_stage *coverage;
 136       struct quad_stage *bufloop;
 137       struct quad_stage *blend;
 138       struct quad_stage *colormask;
 139       struct quad_stage *output;
 140
 141       struct quad_stage *first; /**< points to one of the above stages */
 142    } quad;
 143
 144    /** The primitive drawing context */
 145    struct draw_context *draw;
 146
 147    struct pipe_surface *cbuf;      /**< current color buffer (one of cbufs) */
 148 };
 149
 150
 151
 152
 153 static INLINE struct softpipe_context *
 154 softpipe_context( struct pipe_context *pipe )
 155 {
 156    return (struct softpipe_context *)pipe;
 157 }
 158
 159
 160 #endif /* SP_CONTEXT_H */