src/mesa/state_tracker/st_context.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   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
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  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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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 "pipe/p_state.h"
  33 #include "state_tracker/st_api.h"
  34 #include "main/fbobject.h"
  35 #include "state_tracker/st_atom.h"
  36
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42
  43 struct bitmap_cache;
  44 struct dd_function_table;
  45 struct draw_context;
  46 struct draw_stage;
  47 struct gen_mipmap_state;
  48 struct st_context;
  49 struct st_fragment_program;
  50 struct st_perf_monitor_group;
  51 struct u_upload_mgr;
  52
  53
  54 /** For drawing quads for glClear, glDraw/CopyPixels, glBitmap, etc. */
  55 struct st_util_vertex
  56 {
  57    float x, y, z;
  58    float r, g, b, a;
  59    float s, t;
  60 };
  61
  62
  63 struct st_context
  64 {
  65    struct st_context_iface iface;
  66
  67    struct gl_context *ctx;
  68
  69    struct pipe_context *pipe;
  70
  71    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  72    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  73    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  74    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  75    GLboolean clamp_frag_color_in_shader;
  76    GLboolean clamp_vert_color_in_shader;
  77    boolean has_stencil_export; /**< can do shader stencil export? */
  78    boolean has_time_elapsed;
  79    boolean has_shader_model3;
  80    boolean has_etc1;
  81    boolean has_etc2;
  82    boolean prefer_blit_based_texture_transfer;
  83    boolean force_persample_in_shader;
  84    boolean has_shareable_shaders;
  85    boolean has_half_float_packing;
  86    boolean has_multi_draw_indirect;
  87    boolean has_user_constbuf;
  88
  89    /**
  90     * If a shader can be created when we get its source.
  91     * This means it has only 1 variant, not counting glBitmap and
  92     * glDrawPixels.
  93     */
  94    boolean shader_has_one_variant[MESA_SHADER_STAGES];
  95
  96    boolean needs_texcoord_semantic;
  97    boolean apply_texture_swizzle_to_border_color;
  98
  99    /* On old libGL's for linux we need to invalidate the drawables
 100     * on glViewpport calls, this is set via a option.
 101     */
 102    boolean invalidate_on_gl_viewport;
 103
 104    boolean vertex_array_out_of_memory;
 105
 106    /* Some state is contained in constant objects.
 107     * Other state is just parameter values.
 108     */
 109    struct {
 110       struct pipe_blend_state               blend;
 111       struct pipe_depth_stencil_alpha_state depth_stencil;
 112       struct pipe_rasterizer_state          rasterizer;
 113       struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 114       GLuint num_samplers[PIPE_SHADER_TYPES];
 115       struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 116       GLuint num_sampler_views[PIPE_SHADER_TYPES];
 117       struct pipe_clip_state clip;
 118       struct {
 119          void *ptr;
 120          unsigned size;
 121       } constants[PIPE_SHADER_TYPES];
 122       struct pipe_framebuffer_state framebuffer;
 123       struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
 124       struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
 125       struct {
 126          unsigned num;
 127          boolean include;
 128          struct pipe_scissor_state rects[PIPE_MAX_WINDOW_RECTANGLES];
 129       } window_rects;
 130       unsigned sample_mask;
 131
 132       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 133
 134       GLuint fb_orientation;
 135    } state;
 136
 137    char vendor[100];
 138    char renderer[100];
 139
 140    uint64_t dirty; /**< dirty states */
 141
 142    /** This masks out unused shader resources. Only valid in draw calls. */
 143    uint64_t active_states;
 144
 145    /* If true, further analysis of states is required to know if something
 146     * has changed. Used mainly for shaders.
 147     */
 148    bool gfx_shaders_may_be_dirty;
 149    bool compute_shader_may_be_dirty;
 150
 151    GLboolean vertdata_edgeflags;
 152    GLboolean edgeflag_culls_prims;
 153
 154    /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */
 155    const GLuint *vertex_result_to_slot;
 156
 157    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 158    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 159    struct st_geometry_program *gp;  /**< Currently bound geometry program */
 160    struct st_tessctrl_program *tcp; /**< Currently bound tess control program */
 161    struct st_tesseval_program *tep; /**< Currently bound tess eval program */
 162    struct st_compute_program *cp;   /**< Currently bound compute program */
 163
 164    struct st_vp_variant *vp_variant;
 165    struct st_fp_variant *fp_variant;
 166    struct st_basic_variant *gp_variant;
 167    struct st_basic_variant *tcp_variant;
 168    struct st_basic_variant *tep_variant;
 169    struct st_basic_variant *cp_variant;
 170
 171    struct {
 172       struct pipe_resource *pixelmap_texture;
 173       struct pipe_sampler_view *pixelmap_sampler_view;
 174    } pixel_xfer;
 175
 176    /** for glBitmap */
 177    struct {
 178       struct pipe_rasterizer_state rasterizer;
 179       struct pipe_sampler_state sampler;
 180       struct pipe_sampler_state atlas_sampler;
 181       enum pipe_format tex_format;
 182       void *vs;
 183       struct bitmap_cache *cache;
 184    } bitmap;
 185
 186    /** for glDraw/CopyPixels */
 187    struct {
 188       void *zs_shaders[4];
 189       void *vert_shaders[2];   /**< ureg shaders */
 190    } drawpix;
 191
 192    struct {
 193       GLsizei width, height;
 194       GLenum format, type;
 195       const void *user_pointer;  /**< Last user 'pixels' pointer */
 196       void *image;               /**< Copy of the glDrawPixels image data */
 197       struct pipe_resource *texture;
 198    } drawpix_cache;
 199
 200    /** for glReadPixels */
 201    struct {
 202       struct pipe_resource *src;
 203       struct pipe_resource *cache;
 204       enum pipe_format dst_format;
 205       unsigned level;
 206       unsigned layer;
 207       unsigned hits;
 208    } readpix_cache;
 209
 210    /** for glClear */
 211    struct {
 212       struct pipe_rasterizer_state raster;
 213       struct pipe_viewport_state viewport;
 214       void *vs;
 215       void *fs;
 216       void *vs_layered;
 217       void *gs_layered;
 218    } clear;
 219
 220    /* For gl(Compressed)Tex(Sub)Image */
 221    struct {
 222       struct pipe_rasterizer_state raster;
 223       struct pipe_blend_state upload_blend;
 224       void *vs;
 225       void *gs;
 226       void *upload_fs[3];
 227       void *download_fs[3][PIPE_MAX_TEXTURE_TYPES];
 228       bool upload_enabled;
 229       bool download_enabled;
 230       bool rgba_only;
 231       bool layers;
 232       bool use_gs;
 233    } pbo;
 234
 235    /** for drawing with st_util_vertex */
 236    struct pipe_vertex_element util_velems[3];
 237
 238    void *passthrough_fs;  /**< simple pass-through frag shader */
 239
 240    enum pipe_texture_target internal_target;
 241
 242    struct cso_context *cso_context;
 243
 244    void *winsys_drawable_handle;
 245
 246    /* The number of vertex buffers from the last call of validate_arrays. */
 247    unsigned last_num_vbuffers;
 248
 249    int32_t draw_stamp;
 250    int32_t read_stamp;
 251
 252    struct st_config_options options;
 253
 254    struct st_perf_monitor_group *perfmon;
 255
 256    enum pipe_reset_status reset_status;
 257 };
 258
 259
 260 /* Need this so that we can implement Mesa callbacks in this module.
 261  */
 262 static inline struct st_context *st_context(struct gl_context *ctx)
 263 {
 264    return ctx->st;
 265 }
 266
 267
 268 /**
 269  * Wrapper for struct gl_framebuffer.
 270  * This is an opaque type to the outside world.
 271  */
 272 struct st_framebuffer
 273 {
 274    struct gl_framebuffer Base;
 275    void *Private;
 276
 277    struct st_framebuffer_iface *iface;
 278    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 279    unsigned num_statts;
 280    int32_t stamp;
 281    int32_t iface_stamp;
 282 };
 283
 284
 285 extern void st_init_driver_functions(struct pipe_screen *screen,
 286                                      struct dd_function_table *functions);
 287
 288 void st_invalidate_state(struct gl_context * ctx, GLbitfield new_state);
 289
 290 void st_invalidate_readpix_cache(struct st_context *st);
 291
 292
 293 #define Y_0_TOP 1
 294 #define Y_0_BOTTOM 2
 295
 296 static inline GLuint
 297 st_fb_orientation(const struct gl_framebuffer *fb)
 298 {
 299    if (fb && _mesa_is_winsys_fbo(fb)) {
 300       /* Drawing into a window (on-screen buffer).
 301        *
 302        * Negate Y scale to flip image vertically.
 303        * The NDC Y coords prior to viewport transformation are in the range
 304        * [y=-1=bottom, y=1=top]
 305        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 306        * H is the window height.
 307        * Use the viewport transformation to invert Y.
 308        */
 309       return Y_0_TOP;
 310    }
 311    else {
 312       /* Drawing into user-created FBO (very likely a texture).
 313        *
 314        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 315        */
 316       return Y_0_BOTTOM;
 317    }
 318 }
 319
 320
 321 static inline enum pipe_shader_type
 322 st_shader_stage_to_ptarget(gl_shader_stage stage)
 323 {
 324    switch (stage) {
 325    case MESA_SHADER_VERTEX:
 326       return PIPE_SHADER_VERTEX;
 327    case MESA_SHADER_FRAGMENT:
 328       return PIPE_SHADER_FRAGMENT;
 329    case MESA_SHADER_GEOMETRY:
 330       return PIPE_SHADER_GEOMETRY;
 331    case MESA_SHADER_TESS_CTRL:
 332       return PIPE_SHADER_TESS_CTRL;
 333    case MESA_SHADER_TESS_EVAL:
 334       return PIPE_SHADER_TESS_EVAL;
 335    case MESA_SHADER_COMPUTE:
 336       return PIPE_SHADER_COMPUTE;
 337    }
 338
 339    assert(!"should not be reached");
 340    return PIPE_SHADER_VERTEX;
 341 }
 342
 343 static inline bool
 344 st_user_clip_planes_enabled(struct gl_context *ctx)
 345 {
 346    return (ctx->API == API_OPENGL_COMPAT ||
 347            ctx->API == API_OPENGLES) && /* only ES 1.x */
 348           ctx->Transform.ClipPlanesEnabled;
 349 }
 350
 351 /** clear-alloc a struct-sized object, with casting */
 352 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 353
 354
 355 extern struct st_context *
 356 st_create_context(gl_api api, struct pipe_context *pipe,
 357                   const struct gl_config *visual,
 358                   struct st_context *share,
 359                   const struct st_config_options *options);
 360
 361 extern void
 362 st_destroy_context(struct st_context *st);
 363
 364 uint64_t
 365 st_get_active_states(struct gl_context *ctx);
 366
 367
 368 #ifdef __cplusplus
 369 }
 370 #endif
 371
 372 #endif