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