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 #define FRONT_STATUS_UNDEFINED    0
  49 #define FRONT_STATUS_DIRTY        1
  50 #define FRONT_STATUS_COPY_OF_BACK 2
  51
  52
  53 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  54 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  55 #define ST_NEW_VERTEX_PROGRAM          0x4
  56 #define ST_NEW_FRAMEBUFFER             0x8
  57
  58
  59 struct st_state_flags {
  60    GLuint mesa;
  61    GLuint st;
  62 };
  63
  64 struct st_tracked_state {
  65    const char *name;
  66    struct st_state_flags dirty;
  67    void (*update)( struct st_context *st );
  68 };
  69
  70
  71
  72 struct st_context
  73 {
  74    GLcontext *ctx;
  75
  76    struct pipe_context *pipe;
  77
  78    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  79    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  80    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  81    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  82
  83    /* Some state is contained in constant objects.
  84     * Other state is just parameter values.
  85     */
  86    struct {
  87       struct pipe_blend_state               blend;
  88       struct pipe_depth_stencil_alpha_state depth_stencil;
  89       struct pipe_rasterizer_state          rasterizer;
  90       struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
  91       struct pipe_sampler_state             *sampler_list[PIPE_MAX_SAMPLERS];
  92       struct pipe_clip_state clip;
  93       struct pipe_constant_buffer constants[2];
  94       struct pipe_framebuffer_state framebuffer;
  95       struct pipe_texture *sampler_texture[PIPE_MAX_SAMPLERS];
  96       struct pipe_poly_stipple poly_stipple;
  97       struct pipe_scissor_state scissor;
  98       struct pipe_viewport_state viewport;
  99
 100       GLuint num_samplers;
 101       GLuint num_textures;
 102    } state;
 103
 104    struct {
 105       struct st_tracked_state tracked_state[PIPE_SHADER_TYPES];
 106    } constants;
 107
 108    /* XXX unused: */
 109    struct {
 110       struct gl_fragment_program *fragment_program;
 111    } cb;
 112
 113    GLuint frontbuffer_status;  /**< one of FRONT_STATUS_ */
 114
 115    char vendor[100];
 116    char renderer[100];
 117
 118    /* State to be validated:
 119     */
 120    struct st_tracked_state **atoms;
 121    GLuint nr_atoms;
 122
 123    struct st_state_flags dirty;
 124
 125    GLboolean missing_textures;
 126
 127    GLfloat polygon_offset_scale; /* ?? */
 128
 129    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 130    const GLuint *vertex_result_to_slot;
 131
 132    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 133    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 134
 135    struct gl_texture_object *default_texture;
 136
 137    struct {
 138       struct gl_program_cache *cache;
 139       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 140       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 141       GLuint user_prog_sn;  /**< user fragment program serial no. */
 142       struct st_fragment_program *combined_prog;
 143       GLuint combined_prog_sn;
 144       struct pipe_texture *pixelmap_texture;
 145       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 146    } pixel_xfer;
 147
 148    /** for glBitmap */
 149    struct {
 150       struct pipe_rasterizer_state rasterizer;
 151       struct pipe_sampler_state sampler;
 152       struct pipe_shader_state vert_shader;
 153       enum pipe_format tex_format;
 154       void *vs;
 155       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 156       struct pipe_buffer *vbuf;
 157       unsigned vbuf_slot;       /* next free slot in vbuf */
 158       struct bitmap_cache *cache;
 159    } bitmap;
 160
 161    /** for glDraw/CopyPixels */
 162    struct {
 163       struct st_fragment_program *z_shader;
 164       struct st_vertex_program *vert_shaders[2];
 165    } drawpix;
 166
 167    /** for glClear */
 168    struct {
 169       struct pipe_shader_state vert_shader;
 170       struct pipe_shader_state frag_shader;
 171       struct pipe_rasterizer_state raster;
 172       struct pipe_viewport_state viewport;
 173       void *vs;
 174       void *fs;
 175       float vertices[4][2][4];  /**< vertex pos + color */
 176       struct pipe_buffer *vbuf;
 177       unsigned vbuf_slot;
 178    } clear;
 179
 180    void *passthrough_fs;  /**< simple pass-through frag shader */
 181
 182    struct gen_mipmap_state *gen_mipmap;
 183    struct blit_state *blit;
 184
 185    struct cso_context *cso_context;
 186
 187    int force_msaa;
 188 };
 189
 190
 191 /* Need this so that we can implement Mesa callbacks in this module.
 192  */
 193 static INLINE struct st_context *st_context(GLcontext *ctx)
 194 {
 195    return ctx->st;
 196 }
 197
 198
 199 /**
 200  * Wrapper for GLframebuffer.
 201  * This is an opaque type to the outside world.
 202  */
 203 struct st_framebuffer
 204 {
 205    GLframebuffer Base;
 206    void *Private;
 207    GLuint InitWidth, InitHeight;
 208 };
 209
 210
 211 extern void st_init_driver_functions(struct dd_function_table *functions);
 212
 213 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 214
 215
 216
 217 #define Y_0_TOP 1
 218 #define Y_0_BOTTOM 2
 219
 220 static INLINE GLuint
 221 st_fb_orientation(const struct gl_framebuffer *fb)
 222 {
 223    if (fb && fb->Name == 0) {
 224       /* Drawing into a window (on-screen buffer).
 225        *
 226        * Negate Y scale to flip image vertically.
 227        * The NDC Y coords prior to viewport transformation are in the range
 228        * [y=-1=bottom, y=1=top]
 229        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 230        * H is the window height.
 231        * Use the viewport transformation to invert Y.
 232        */
 233       return Y_0_TOP;
 234    }
 235    else {
 236       /* Drawing into user-created FBO (very likely a texture).
 237        *
 238        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 239        */
 240       return Y_0_BOTTOM;
 241    }
 242 }
 243
 244
 245 /** clear-alloc a struct-sized object, with casting */
 246 #define ST_CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
 247
 248
 249 extern int
 250 st_get_msaa(void);
 251
 252
 253 #endif