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