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_fragment_program;
  40 struct draw_context;
  41 struct draw_stage;
  42 struct cso_cache;
  43 struct cso_blend;
  44
  45 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  46 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  47 #define ST_NEW_VERTEX_PROGRAM          0x4
  48
  49
  50 struct st_state_flags {
  51    GLuint mesa;
  52    GLuint st;
  53 };
  54
  55 struct st_tracked_state {
  56    const char *name;
  57    struct st_state_flags dirty;
  58    void (*update)( struct st_context *st );
  59 };
  60
  61
  62
  63 struct st_texture_image
  64 {
  65    struct gl_texture_image base;
  66
  67    /* These aren't stored in gl_texture_image
  68     */
  69    GLuint level;
  70    GLuint face;
  71
  72    /* If stImage->pt != NULL, image data is stored here.
  73     * Else if stImage->base.Data != NULL, image is stored there.
  74     * Else there is no image data.
  75     */
  76    struct pipe_texture *pt;
  77
  78    struct pipe_surface *surface;
  79 };
  80
  81
  82
  83 struct st_context
  84 {
  85    GLcontext *ctx;
  86
  87    struct pipe_context *pipe;
  88
  89    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  90    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  91    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  92    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  93
  94    /* Some state is contained in constant objects.
  95     * Other state is just parameter values.
  96     */
  97    struct {
  98       const struct cso_alpha_test      *alpha_test;
  99       const struct cso_blend           *blend;
 100       const struct cso_sampler         *sampler[PIPE_MAX_SAMPLERS];
 101       const struct cso_depth_stencil   *depth_stencil;
 102       const struct cso_rasterizer      *rasterizer;
 103       const struct cso_fragment_shader *fs;
 104       const struct cso_vertex_shader   *vs;
 105
 106       struct pipe_blend_color  blend_color;
 107       struct pipe_clear_color_state clear_color;
 108       struct pipe_clip_state clip;
 109       struct pipe_constant_buffer constants[2];
 110       struct pipe_feedback_state feedback;
 111       struct pipe_framebuffer_state framebuffer;
 112       struct pipe_texture *texture[PIPE_MAX_SAMPLERS];
 113       struct pipe_poly_stipple poly_stipple;
 114       struct pipe_scissor_state scissor;
 115       struct pipe_viewport_state viewport;
 116    } state;
 117
 118    struct {
 119       struct st_tracked_state tracked_state[2];
 120    } constants;
 121
 122    /* XXX unused: */
 123    struct {
 124       struct gl_fragment_program *fragment_program;
 125    } cb;
 126
 127    struct {
 128       GLuint frontbuffer_dirty:1;
 129    } flags;
 130
 131    char vendor[100];
 132    char renderer[100];
 133
 134    /** Can we access the front/back color buffers as pipe_regions?
 135     * We can't with the Xlib driver...
 136     * This is a hack that should be fixed someday.
 137     */
 138    GLboolean haveFramebufferRegions;
 139
 140    /* State to be validated:
 141     */
 142    struct st_tracked_state **atoms;
 143    GLuint nr_atoms;
 144
 145    struct st_state_flags dirty;
 146
 147    GLfloat polygon_offset_scale; /* ?? */
 148
 149    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 150    const GLuint *vertex_result_to_slot;
 151
 152    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 153    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 154
 155    struct {
 156       struct gl_program_cache *cache;
 157       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 158       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 159       GLuint user_prog_sn;  /**< user fragment program serial no. */
 160       struct st_fragment_program *combined_prog;
 161       GLuint combined_prog_sn;
 162    } pixel_xfer;
 163
 164    struct {
 165       struct st_fragment_program *program;  /**< bitmap tex/kil program */
 166       GLuint user_prog_sn;  /**< user fragment program serial no. */
 167       struct st_fragment_program *combined_prog;
 168    } bitmap;
 169
 170    /**
 171     * Buffer object which stores the ctx->Current.Attrib[] values.
 172     * Used for vertex array drawing when we we need an attribute for
 173     * which there's no enabled array.
 174     */
 175    struct pipe_buffer_handle *default_attrib_buffer;
 176
 177    struct cso_cache *cache;
 178 };
 179
 180
 181 /* Need this so that we can implement Mesa callbacks in this module.
 182  */
 183 static INLINE struct st_context *st_context(GLcontext *ctx)
 184 {
 185    return ctx->st;
 186 }
 187
 188
 189 /**
 190  * Wrapper for GLframebuffer.
 191  * This is an opaque type to the outside world.
 192  */
 193 struct st_framebuffer
 194 {
 195    GLframebuffer Base;
 196    void *Private;
 197 };
 198
 199
 200 extern void st_init_driver_functions(struct dd_function_table *functions);
 201
 202 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 203
 204
 205
 206 #define Y_0_TOP 1
 207 #define Y_0_BOTTOM 2
 208
 209 static INLINE GLuint
 210 st_fb_orientation(const struct gl_framebuffer *fb)
 211 {
 212    if (fb && fb->Name == 0) {
 213       /* Drawing into a window (on-screen buffer).
 214        *
 215        * Negate Y scale to flip image vertically.
 216        * The NDC Y coords prior to viewport transformation are in the range
 217        * [y=-1=bottom, y=1=top]
 218        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 219        * H is the window height.
 220        * Use the viewport transformation to invert Y.
 221        */
 222       return Y_0_TOP;
 223    }
 224    else {
 225       /* Drawing into user-created FBO (very likely a texture).
 226        *
 227        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 228        */
 229       return Y_0_BOTTOM;
 230    }
 231 }
 232
 233
 234 #endif