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   *depth_stencil;
 101       const struct cso_rasterizer      *rasterizer;
 102       const struct cso_fragment_shader *fs;
 103       const struct cso_vertex_shader   *vs;
 104
 105       struct pipe_blend_color  blend_color;
 106       struct pipe_clear_color_state clear_color;
 107       struct pipe_clip_state clip;
 108       struct pipe_constant_buffer constants[2];
 109       struct pipe_feedback_state feedback;
 110       struct pipe_framebuffer_state framebuffer;
 111       struct pipe_texture *texture[PIPE_MAX_SAMPLERS];
 112       struct pipe_poly_stipple poly_stipple;
 113       struct pipe_scissor_state scissor;
 114       struct pipe_viewport_state viewport;
 115    } state;
 116
 117    struct {
 118       struct st_tracked_state tracked_state[2];
 119    } constants;
 120
 121    /* XXX unused: */
 122    struct {
 123       struct gl_fragment_program *fragment_program;
 124    } cb;
 125
 126    struct {
 127       GLuint frontbuffer_dirty:1;
 128    } flags;
 129
 130    char vendor[100];
 131    char renderer[100];
 132
 133    /** Can we access the front/back color buffers as pipe_surfaces?
 134     * We can't with the Xlib driver...
 135     * This is a hack that should be fixed someday.
 136     */
 137    GLboolean haveFramebufferSurfaces;
 138
 139    /* State to be validated:
 140     */
 141    struct st_tracked_state **atoms;
 142    GLuint nr_atoms;
 143
 144    struct st_state_flags dirty;
 145
 146    GLfloat polygon_offset_scale; /* ?? */
 147
 148    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 149    const GLuint *vertex_result_to_slot;
 150
 151    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 152    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 153
 154    struct {
 155       struct gl_program_cache *cache;
 156       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 157       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 158       GLuint user_prog_sn;  /**< user fragment program serial no. */
 159       struct st_fragment_program *combined_prog;
 160       GLuint combined_prog_sn;
 161    } pixel_xfer;
 162
 163    struct {
 164       struct st_fragment_program *program;  /**< bitmap tex/kil program */
 165       GLuint user_prog_sn;  /**< user fragment program serial no. */
 166       struct st_fragment_program *combined_prog;
 167    } bitmap;
 168
 169    /**
 170     * Buffer object which stores the ctx->Current.Attrib[] values.
 171     * Used for vertex array drawing when we we need an attribute for
 172     * which there's no enabled array.
 173     */
 174    struct pipe_buffer_handle *default_attrib_buffer;
 175
 176    struct cso_cache *cache;
 177 };
 178
 179
 180 /* Need this so that we can implement Mesa callbacks in this module.
 181  */
 182 static INLINE struct st_context *st_context(GLcontext *ctx)
 183 {
 184    return ctx->st;
 185 }
 186
 187
 188 /**
 189  * Wrapper for GLframebuffer.
 190  * This is an opaque type to the outside world.
 191  */
 192 struct st_framebuffer
 193 {
 194    GLframebuffer Base;
 195    void *Private;
 196 };
 197
 198
 199 extern void st_init_driver_functions(struct dd_function_table *functions);
 200
 201 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 202
 203
 204
 205 #define Y_0_TOP 1
 206 #define Y_0_BOTTOM 2
 207
 208 static INLINE GLuint
 209 st_fb_orientation(const struct gl_framebuffer *fb)
 210 {
 211    if (fb && fb->Name == 0) {
 212       /* Drawing into a window (on-screen buffer).
 213        *
 214        * Negate Y scale to flip image vertically.
 215        * The NDC Y coords prior to viewport transformation are in the range
 216        * [y=-1=bottom, y=1=top]
 217        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 218        * H is the window height.
 219        * Use the viewport transformation to invert Y.
 220        */
 221       return Y_0_TOP;
 222    }
 223    else {
 224       /* Drawing into user-created FBO (very likely a texture).
 225        *
 226        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 227        */
 228       return Y_0_BOTTOM;
 229    }
 230 }
 231
 232
 233 #endif