src/mesa/state_tracker/st_context.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #ifndef ST_CONTEXT_H
  29 #define ST_CONTEXT_H
  30
  31 #include "main/mtypes.h"
  32 #include "shader/prog_cache.h"
  33 #include "pipe/p_state.h"
  34
  35
  36 struct st_context;
  37 struct st_texture_object;
  38 struct st_fragment_program;
  39 struct draw_context;
  40 struct draw_stage;
  41 struct cso_cache;
  42 struct cso_blend;
  43 struct gen_mipmap_state;
  44 struct blit_state;
  45
  46
  47 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  48 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  49 #define ST_NEW_VERTEX_PROGRAM          0x4
  50
  51
  52 struct st_state_flags {
  53    GLuint mesa;
  54    GLuint st;
  55 };
  56
  57 struct st_tracked_state {
  58    const char *name;
  59    struct st_state_flags dirty;
  60    void (*update)( struct st_context *st );
  61 };
  62
  63
  64
  65 struct st_context
  66 {
  67    GLcontext *ctx;
  68
  69    struct pipe_context *pipe;
  70
  71    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  72    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  73    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  74    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  75
  76    /* Some state is contained in constant objects.
  77     * Other state is just parameter values.
  78     */
  79    struct {
  80       struct pipe_blend_state               blend;
  81       struct pipe_depth_stencil_alpha_state depth_stencil;
  82       struct pipe_rasterizer_state          rasterizer;
  83       struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
  84       struct pipe_sampler_state             *sampler_list[PIPE_MAX_SAMPLERS];
  85       struct pipe_clip_state clip;
  86       struct pipe_constant_buffer constants[2];
  87       struct pipe_framebuffer_state framebuffer;
  88       struct pipe_texture *sampler_texture[PIPE_MAX_SAMPLERS];
  89       struct pipe_poly_stipple poly_stipple;
  90       struct pipe_scissor_state scissor;
  91       struct pipe_viewport_state viewport;
  92
  93       GLuint num_samplers;
  94       GLuint num_textures;
  95    } state;
  96
  97    struct {
  98       struct st_tracked_state tracked_state[2];
  99    } constants;
 100
 101    /* XXX unused: */
 102    struct {
 103       struct gl_fragment_program *fragment_program;
 104    } cb;
 105
 106    struct {
 107       GLuint frontbuffer_dirty:1;
 108    } flags;
 109
 110    char vendor[100];
 111    char renderer[100];
 112
 113    /** Can we access the front/back color buffers as pipe_surfaces?
 114     * We can't with the Xlib driver...
 115     * This is a hack that should be fixed someday.
 116     */
 117    GLboolean haveFramebufferSurfaces;
 118
 119    /* State to be validated:
 120     */
 121    struct st_tracked_state **atoms;
 122    GLuint nr_atoms;
 123
 124    struct st_state_flags dirty;
 125
 126    GLfloat polygon_offset_scale; /* ?? */
 127
 128    GLfloat bitmap_texcoord_bias;
 129
 130    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 131    const GLuint *vertex_result_to_slot;
 132
 133    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 134    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 135
 136    struct {
 137       struct gl_program_cache *cache;
 138       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 139       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 140       GLuint user_prog_sn;  /**< user fragment program serial no. */
 141       struct st_fragment_program *combined_prog;
 142       GLuint combined_prog_sn;
 143    } pixel_xfer;
 144
 145    /** for glBitmap */
 146    struct {
 147       struct st_fragment_program *program;  /**< bitmap tex/kil program */
 148       GLuint user_prog_sn;  /**< user fragment program serial no. */
 149       struct st_fragment_program *combined_prog;
 150       void *vs;
 151       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 152       struct pipe_buffer *vbuf;
 153    } bitmap;
 154
 155    /** for glClear */
 156    struct {
 157       void *vs;
 158       void *fs;
 159       float vertices[4][2][4];  /**< vertex pos + color */
 160       struct pipe_buffer *vbuf;
 161    } clear;
 162
 163    struct gen_mipmap_state *gen_mipmap;
 164    struct blit_state *blit;
 165
 166    struct cso_context *cso_context;
 167 };
 168
 169
 170 /* Need this so that we can implement Mesa callbacks in this module.
 171  */
 172 static INLINE struct st_context *st_context(GLcontext *ctx)
 173 {
 174    return ctx->st;
 175 }
 176
 177
 178 /**
 179  * Wrapper for GLframebuffer.
 180  * This is an opaque type to the outside world.
 181  */
 182 struct st_framebuffer
 183 {
 184    GLframebuffer Base;
 185    void *Private;
 186    GLuint InitWidth, InitHeight;
 187 };
 188
 189
 190 extern void st_init_driver_functions(struct dd_function_table *functions);
 191
 192 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 193
 194
 195
 196 #define Y_0_TOP 1
 197 #define Y_0_BOTTOM 2
 198
 199 static INLINE GLuint
 200 st_fb_orientation(const struct gl_framebuffer *fb)
 201 {
 202    if (fb && fb->Name == 0) {
 203       /* Drawing into a window (on-screen buffer).
 204        *
 205        * Negate Y scale to flip image vertically.
 206        * The NDC Y coords prior to viewport transformation are in the range
 207        * [y=-1=bottom, y=1=top]
 208        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 209        * H is the window height.
 210        * Use the viewport transformation to invert Y.
 211        */
 212       return Y_0_TOP;
 213    }
 214    else {
 215       /* Drawing into user-created FBO (very likely a texture).
 216        *
 217        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 218        */
 219       return Y_0_BOTTOM;
 220    }
 221 }
 222
 223
 224 #endif