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 struct bitmap_cache;
  46
  47
  48 /** XXX we'd like to get rid of these */
  49 #define FRONT_STATUS_UNDEFINED    0
  50 #define FRONT_STATUS_DIRTY        1
  51 #define FRONT_STATUS_COPY_OF_BACK 2
  52
  53
  54 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  55 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  56 #define ST_NEW_VERTEX_PROGRAM          0x4
  57 #define ST_NEW_FRAMEBUFFER             0x8
  58
  59
  60 struct st_state_flags {
  61    GLuint mesa;
  62    GLuint st;
  63 };
  64
  65 struct st_tracked_state {
  66    const char *name;
  67    struct st_state_flags dirty;
  68    void (*update)( struct st_context *st );
  69 };
  70
  71
  72
  73 struct st_context
  74 {
  75    GLcontext *ctx;
  76
  77    struct pipe_context *pipe;
  78
  79    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  80    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  81    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  82    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  83
  84    /* Some state is contained in constant objects.
  85     * Other state is just parameter values.
  86     */
  87    struct {
  88       struct pipe_blend_state               blend;
  89       struct pipe_depth_stencil_alpha_state depth_stencil;
  90       struct pipe_rasterizer_state          rasterizer;
  91       struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
  92       struct pipe_sampler_state             *sampler_list[PIPE_MAX_SAMPLERS];
  93       struct pipe_clip_state clip;
  94       struct pipe_constant_buffer constants[2];
  95       struct pipe_framebuffer_state framebuffer;
  96       struct pipe_texture *sampler_texture[PIPE_MAX_SAMPLERS];
  97       struct pipe_scissor_state scissor;
  98       struct pipe_viewport_state viewport;
  99
 100       GLuint num_samplers;
 101       GLuint num_textures;
 102
 103       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 104    } state;
 105
 106    struct {
 107       struct st_tracked_state tracked_state[PIPE_SHADER_TYPES];
 108    } constants;
 109
 110    /* XXX unused: */
 111    struct {
 112       struct gl_fragment_program *fragment_program;
 113    } cb;
 114
 115    GLuint frontbuffer_status;  /**< one of FRONT_STATUS_ (XXX to be removed) */
 116
 117    char vendor[100];
 118    char renderer[100];
 119
 120    struct st_state_flags dirty;
 121
 122    GLboolean missing_textures;
 123
 124    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 125    const GLuint *vertex_result_to_slot;
 126
 127    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 128    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 129
 130    struct gl_texture_object *default_texture;
 131
 132    struct {
 133       struct gl_program_cache *cache;
 134       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 135       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 136       GLuint user_prog_sn;  /**< user fragment program serial no. */
 137       struct st_fragment_program *combined_prog;
 138       GLuint combined_prog_sn;
 139       struct pipe_texture *pixelmap_texture;
 140       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 141    } pixel_xfer;
 142
 143    /** for glBitmap */
 144    struct {
 145       struct pipe_rasterizer_state rasterizer;
 146       struct pipe_sampler_state sampler;
 147       enum pipe_format tex_format;
 148       void *vs;
 149       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 150       struct pipe_buffer *vbuf;
 151       unsigned vbuf_slot;       /* next free slot in vbuf */
 152       struct bitmap_cache *cache;
 153    } bitmap;
 154
 155    /** for glDraw/CopyPixels */
 156    struct {
 157       struct st_fragment_program *z_shader;
 158       struct st_vertex_program *vert_shaders[2];
 159    } drawpix;
 160
 161    /** for glClear */
 162    struct {
 163       struct pipe_rasterizer_state raster;
 164       struct pipe_viewport_state viewport;
 165       void *vs;
 166       void *fs;
 167       float vertices[4][2][4];  /**< vertex pos + color */
 168       struct pipe_buffer *vbuf;
 169       unsigned vbuf_slot;
 170    } clear;
 171
 172    void *passthrough_fs;  /**< simple pass-through frag shader */
 173
 174    struct gen_mipmap_state *gen_mipmap;
 175    struct blit_state *blit;
 176
 177    struct cso_context *cso_context;
 178
 179    int force_msaa;
 180 };
 181
 182
 183 /* Need this so that we can implement Mesa callbacks in this module.
 184  */
 185 static INLINE struct st_context *st_context(GLcontext *ctx)
 186 {
 187    return ctx->st;
 188 }
 189
 190
 191 /**
 192  * Wrapper for GLframebuffer.
 193  * This is an opaque type to the outside world.
 194  */
 195 struct st_framebuffer
 196 {
 197    GLframebuffer Base;
 198    void *Private;
 199    GLuint InitWidth, InitHeight;
 200 };
 201
 202
 203 extern void st_init_driver_functions(struct dd_function_table *functions);
 204
 205 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 206
 207
 208
 209 #define Y_0_TOP 1
 210 #define Y_0_BOTTOM 2
 211
 212 static INLINE GLuint
 213 st_fb_orientation(const struct gl_framebuffer *fb)
 214 {
 215    if (fb && fb->Name == 0) {
 216       /* Drawing into a window (on-screen buffer).
 217        *
 218        * Negate Y scale to flip image vertically.
 219        * The NDC Y coords prior to viewport transformation are in the range
 220        * [y=-1=bottom, y=1=top]
 221        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 222        * H is the window height.
 223        * Use the viewport transformation to invert Y.
 224        */
 225       return Y_0_TOP;
 226    }
 227    else {
 228       /* Drawing into user-created FBO (very likely a texture).
 229        *
 230        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 231        */
 232       return Y_0_BOTTOM;
 233    }
 234 }
 235
 236
 237 /** clear-alloc a struct-sized object, with casting */
 238 #define ST_CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
 239
 240
 241 extern int
 242 st_get_msaa(void);
 243
 244
 245 #endif