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_region;
  38 struct st_texture_object;
  39 struct st_texture_image;
  40 struct st_fragment_program;
  41 struct draw_context;
  42 struct draw_stage;
  43 struct cso_cache;
  44 struct cso_blend;
  45
  46 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  47 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  48 #define ST_NEW_VERTEX_PROGRAM          0x4
  49
  50
  51 struct st_state_flags {
  52    GLuint mesa;
  53    GLuint st;
  54 };
  55
  56 struct st_tracked_state {
  57    const char *name;
  58    struct st_state_flags dirty;
  59    void (*update)( struct st_context *st );
  60 };
  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 */
  72    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  73    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  74
  75    /* Some state is contained in constant objects.
  76     * Other state is just parameter values.
  77     */
  78    struct {
  79       const struct cso_alpha_test      *alpha_test;
  80       const struct cso_blend           *blend;
  81       const struct cso_sampler         *sampler[PIPE_MAX_SAMPLERS];
  82       const struct cso_depth_stencil   *depth_stencil;
  83       const struct cso_rasterizer      *rasterizer;
  84       const struct cso_fragment_shader *fs;
  85       const struct cso_vertex_shader   *vs;
  86
  87       struct pipe_blend_color  blend_color;
  88       struct pipe_clear_color_state clear_color;
  89       struct pipe_clip_state clip;
  90       struct pipe_constant_buffer constants[2];
  91       struct pipe_feedback_state feedback;
  92       struct pipe_framebuffer_state framebuffer;
  93       struct pipe_mipmap_tree *texture[PIPE_MAX_SAMPLERS];
  94       struct pipe_poly_stipple poly_stipple;
  95       struct pipe_scissor_state scissor;
  96       struct pipe_viewport_state viewport;
  97    } state;
  98
  99    struct {
 100       struct st_tracked_state tracked_state[2];
 101    } constants;
 102
 103    /* XXX unused: */
 104    struct {
 105       struct gl_fragment_program *fragment_program;
 106    } cb;
 107
 108    struct {
 109       GLuint frontbuffer_dirty:1;
 110    } flags;
 111
 112    char vendor[100];
 113    char renderer[100];
 114
 115    /** Can we access the front/back color buffers as pipe_regions?
 116     * We can't with the Xlib driver...
 117     * This is a hack that should be fixed someday.
 118     */
 119    GLboolean haveFramebufferRegions;
 120
 121    /* State to be validated:
 122     */
 123    struct st_tracked_state **atoms;
 124    GLuint nr_atoms;
 125
 126    struct st_state_flags dirty;
 127
 128    GLfloat polygon_offset_scale; /* ?? */
 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    struct {
 146       struct st_fragment_program *program;  /**< bitmap tex/kil program */
 147       GLuint user_prog_sn;  /**< user fragment program serial no. */
 148       struct st_fragment_program *combined_prog;
 149    } bitmap;
 150
 151    /**
 152     * Buffer object which stores the ctx->Current.Attrib[] values.
 153     * Used for vertex array drawing when we we need an attribute for
 154     * which there's no enabled array.
 155     */
 156    struct pipe_buffer_handle *default_attrib_buffer;
 157
 158    struct cso_cache *cache;
 159 };
 160
 161
 162 /* Need this so that we can implement Mesa callbacks in this module.
 163  */
 164 static INLINE struct st_context *st_context(GLcontext *ctx)
 165 {
 166    return ctx->st;
 167 }
 168
 169
 170 /**
 171  * Wrapper for GLframebuffer.
 172  * This is an opaque type to the outside world.
 173  */
 174 struct st_framebuffer
 175 {
 176    GLframebuffer Base;
 177    void *Private;
 178 };
 179
 180
 181 extern void st_init_driver_functions(struct dd_function_table *functions);
 182
 183
 184
 185 #define Y_0_TOP 1
 186 #define Y_0_BOTTOM 2
 187
 188 static INLINE GLuint
 189 st_fb_orientation(const struct gl_framebuffer *fb)
 190 {
 191    if (fb && fb->Name == 0) {
 192       /* Drawing into a window (on-screen buffer).
 193        *
 194        * Negate Y scale to flip image vertically.
 195        * The NDC Y coords prior to viewport transformation are in the range
 196        * [y=-1=bottom, y=1=top]
 197        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 198        * H is the window height.
 199        * Use the viewport transformation to invert Y.
 200        */
 201       return Y_0_TOP;
 202    }
 203    else {
 204       /* Drawing into user-created FBO (very likely a texture).
 205        *
 206        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 207        */
 208       return Y_0_BOTTOM;
 209    }
 210 }
 211
 212
 213 #endif