src/mesa/pipe/p_state.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
  29 /**
  30  * Abstract graphics pipe state objects.
  31  *
  32  * Basic notes:
  33  *   1. Want compact representations, so we use bitfields.
  34  *   2. Put bitfields before other (GLfloat) fields.
  35  */
  36
  37
  38 #ifndef PIPE_STATE_H
  39 #define PIPE_STATE_H
  40
  41 #include "mtypes.h"
  42
  43
  44 /**
  45  * Primitive (point/line/tri) setup info
  46  */
  47 struct pipe_setup_state
  48 {
  49    GLuint flatshade:1;
  50    GLuint light_twoside:1;
  51
  52    GLuint front_winding:2;  /**< PIPE_WINDING_x */
  53
  54    GLuint cull_mode:2;      /**< PIPE_WINDING_x */
  55
  56    GLuint fill_cw:2;        /**< PIPE_POLYGON_MODE_x */
  57    GLuint fill_ccw:2;       /**< PIPE_POLYGON_MODE_x */
  58
  59    GLuint offset_cw:1;
  60    GLuint offset_ccw:1;
  61
  62    GLuint scissor:1;
  63    GLuint poly_stipple:1;
  64    GLuint poly_smooth:1;
  65
  66    GLfloat offset_units;
  67    GLfloat offset_scale;
  68 };
  69
  70 struct pipe_poly_stipple {
  71    GLuint stipple[32];
  72 };
  73
  74
  75 struct pipe_viewport {
  76    GLfloat scale[4];
  77    GLfloat translate[4];
  78 };
  79
  80 struct pipe_scissor_rect {
  81    GLshort minx;
  82    GLshort miny;
  83    GLshort maxx;
  84    GLshort maxy;
  85 };
  86
  87
  88 #define PIPE_MAX_CLIP_PLANES 6
  89
  90 struct pipe_clip_state {
  91    GLfloat ucp[PIPE_MAX_CLIP_PLANES][4];
  92    GLuint nr;
  93 };
  94
  95 struct pipe_fs_state {
  96    struct gl_fragment_program *fp;
  97 };
  98
  99 #define PIPE_MAX_CONSTANT 32
 100
 101 struct pipe_constant_buffer {
 102    GLfloat constant[PIPE_MAX_CONSTANT][4];
 103    GLuint nr_constants;
 104 };
 105
 106
 107 struct pipe_depth_state
 108 {
 109    GLuint enabled:1;   /**< depth test enabled? */
 110    GLuint writemask:1; /**< allow depth buffer writes? */
 111    GLuint func:3;      /**< depth test func (PIPE_FUNC_x) */
 112    GLfloat clear;      /**< Clear value in [0,1] (XXX correct place?) */
 113 };
 114
 115 struct pipe_alpha_test_state {
 116    GLuint enabled:1;
 117    GLuint func:3;    /**< PIPE_FUNC_x */
 118    GLfloat ref;      /**< reference value */
 119 };
 120
 121 struct pipe_blend_state {
 122    GLuint blend_enable:1;
 123
 124    GLuint rgb_func:3;          /**< PIPE_BLEND_x */
 125    GLuint rgb_src_factor:5;    /**< PIPE_BLENDFACTOR_x */
 126    GLuint rgb_dst_factor:5;    /**< PIPE_BLENDFACTOR_x */
 127
 128    GLuint alpha_func:3;        /**< PIPE_BLEND_x */
 129    GLuint alpha_src_factor:5;  /**< PIPE_BLENDFACTOR_x */
 130    GLuint alpha_dst_factor:5;  /**< PIPE_BLENDFACTOR_x */
 131
 132    GLuint logicop_enable:1;
 133    GLuint logicop_func:4;      /**< PIPE_LOGICOP_x */
 134 };
 135
 136 struct pipe_blend_color {
 137    GLfloat color[4];
 138 };
 139
 140 struct pipe_clear_color_state
 141 {
 142    GLfloat color[4];
 143 };
 144
 145 /** XXXX probably merge into pipe_setup_state */
 146 struct pipe_line_state
 147 {
 148    GLuint smooth:1;
 149    GLuint stipple:1;
 150    GLushort stipple_pattern;
 151    GLint stipple_factor;
 152    GLfloat width;
 153 };
 154
 155 /** XXXX probably merge into pipe_setup_state */
 156 struct pipe_point_state
 157 {
 158    GLuint smooth:1;
 159    GLfloat size;
 160    GLfloat min_size, max_size;
 161    GLfloat attenuation[3];
 162 };
 163
 164 struct pipe_stencil_state {
 165    GLuint front_enabled:1;
 166    GLuint front_func:3;     /**< PIPE_FUNC_x */
 167    GLuint front_fail_op:3;  /**< PIPE_STENCIL_OP_x */
 168    GLuint front_zpass_op:3; /**< PIPE_STENCIL_OP_x */
 169    GLuint front_zfail_op:3; /**< PIPE_STENCIL_OP_x */
 170    GLuint back_enabled:1;
 171    GLuint back_func:3;
 172    GLuint back_fail_op:3;
 173    GLuint back_zpass_op:3;
 174    GLuint back_zfail_op:3;
 175    GLubyte ref_value[2];      /**< [0] = front, [1] = back */
 176    GLubyte value_mask[2];
 177    GLubyte write_mask[2];
 178    GLubyte clear_value;
 179 };
 180
 181
 182 /* This will change for hardware pipes...
 183  */
 184 struct pipe_surface
 185 {
 186    GLuint width, height;
 187    GLubyte *ptr;
 188    GLint stride;
 189    GLuint cpp;
 190    GLuint format;
 191 };
 192
 193
 194 struct pipe_framebuffer_state
 195 {
 196    GLuint num_cbufs;               /**< Number of color bufs to draw to */
 197    struct pipe_surface *cbufs[4];  /**< OpenGL can write to as many as
 198                                         4 color buffers at once */
 199    struct pipe_surface *zbuf;      /**< Z buffer */
 200    struct pipe_surface *sbuf;      /**< Stencil buffer */
 201    struct pipe_surface *abuf;      /**< Accum buffer */
 202 };
 203
 204
 205 /**
 206  * Texture sampler state.
 207  */
 208 struct pipe_sampler_state
 209 {
 210    GLuint wrap_s:3;        /**< PIPE_TEX_WRAP_x */
 211    GLuint wrap_t:3;        /**< PIPE_TEX_WRAP_x */
 212    GLuint wrap_r:3;        /**< PIPE_TEX_WRAP_x */
 213    GLuint min_filter:3;    /**< PIPE_TEX_FILTER_x */
 214    GLuint mag_filter:1;    /**< PIPE_TEX_FILTER_LINEAR or _NEAREST */
 215    GLuint compare:1;       /**< shadow/depth compare enabled? */
 216    GLenum compare_mode:1;  /**< PIPE_TEX_COMPARE_x */
 217    GLenum compare_func:3;  /**< PIPE_FUNC_x */
 218    GLfloat shadow_ambient; /**< shadow test fail color/intensity */
 219    GLfloat min_lod;
 220    GLfloat max_lod;
 221    GLfloat lod_bias;
 222 #if 0 /* need these? */
 223    GLint BaseLevel;     /**< min mipmap level, OpenGL 1.2 */
 224    GLint MaxLevel;      /**< max mipmap level, OpenGL 1.2 */
 225 #endif
 226    GLfloat max_anisotropy;
 227 };
 228
 229 #endif