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
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41
  42 struct bitmap_cache;
  43 struct dd_function_table;
  44 struct draw_context;
  45 struct draw_stage;
  46 struct gen_mipmap_state;
  47 struct st_context;
  48 struct st_fragment_program;
  49 struct u_upload_mgr;
  50
  51
  52 #define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
  53 #define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)
  54 #define ST_NEW_VERTEX_PROGRAM          (1 << 2)
  55 #define ST_NEW_FRAMEBUFFER             (1 << 3)
  56 /* gap, re-use it */
  57 #define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)
  58 #define ST_NEW_VERTEX_ARRAYS           (1 << 6)
  59 #define ST_NEW_RASTERIZER              (1 << 7)
  60 #define ST_NEW_UNIFORM_BUFFER          (1 << 8)
  61
  62
  63 struct st_state_flags {
  64    GLuint mesa;
  65    uint64_t st;
  66 };
  67
  68 struct st_tracked_state {
  69    const char *name;
  70    struct st_state_flags dirty;
  71    void (*update)( struct st_context *st );
  72 };
  73
  74
  75
  76 struct st_context
  77 {
  78    struct st_context_iface iface;
  79
  80    struct gl_context *ctx;
  81
  82    struct pipe_context *pipe;
  83
  84    struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
  85
  86    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  87    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  88    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  89    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  90    GLboolean clamp_frag_color_in_shader;
  91    GLboolean clamp_vert_color_in_shader;
  92    boolean has_stencil_export; /**< can do shader stencil export? */
  93    boolean has_time_elapsed;
  94    boolean has_shader_model3;
  95    boolean has_etc1;
  96    boolean has_etc2;
  97    boolean prefer_blit_based_texture_transfer;
  98
  99    boolean needs_texcoord_semantic;
 100    boolean apply_texture_swizzle_to_border_color;
 101
 102    /* On old libGL's for linux we need to invalidate the drawables
 103     * on glViewpport calls, this is set via a option.
 104     */
 105    boolean invalidate_on_gl_viewport;
 106
 107    boolean vertex_array_out_of_memory;
 108
 109    /* Some state is contained in constant objects.
 110     * Other state is just parameter values.
 111     */
 112    struct {
 113       struct pipe_blend_state               blend;
 114       struct pipe_depth_stencil_alpha_state depth_stencil;
 115       struct pipe_rasterizer_state          rasterizer;
 116       struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 117       GLuint num_samplers[PIPE_SHADER_TYPES];
 118       struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 119       GLuint num_sampler_views[PIPE_SHADER_TYPES];
 120       struct pipe_clip_state clip;
 121       struct {
 122          void *ptr;
 123          unsigned size;
 124       } constants[PIPE_SHADER_TYPES];
 125       struct pipe_framebuffer_state framebuffer;
 126       struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
 127       struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
 128       unsigned sample_mask;
 129
 130       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 131
 132       GLuint fb_orientation;
 133    } state;
 134
 135    char vendor[100];
 136    char renderer[100];
 137
 138    struct st_state_flags dirty;
 139
 140    GLboolean missing_textures;
 141    GLboolean vertdata_edgeflags;
 142    GLboolean edgeflag_culls_prims;
 143
 144    /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */
 145    const GLuint *vertex_result_to_slot;
 146
 147    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 148    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 149    struct st_geometry_program *gp;  /**< Currently bound geometry program */
 150
 151    struct st_vp_variant *vp_variant;
 152    struct st_fp_variant *fp_variant;
 153    struct st_gp_variant *gp_variant;
 154
 155    struct gl_texture_object *default_texture;
 156
 157    struct {
 158       struct gl_program_cache *cache;
 159       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 160       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 161       GLuint user_prog_sn;  /**< user fragment program serial no. */
 162       struct st_fragment_program *combined_prog;
 163       GLuint combined_prog_sn;
 164       struct pipe_resource *pixelmap_texture;
 165       struct pipe_sampler_view *pixelmap_sampler_view;
 166       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 167    } pixel_xfer;
 168
 169    /** for glBitmap */
 170    struct {
 171       struct pipe_rasterizer_state rasterizer;
 172       struct pipe_sampler_state samplers[2];
 173       enum pipe_format tex_format;
 174       void *vs;
 175       struct bitmap_cache *cache;
 176    } bitmap;
 177
 178    /** for glDraw/CopyPixels */
 179    struct {
 180       struct gl_fragment_program *shaders[4];
 181       void *vert_shaders[2];   /**< ureg shaders */
 182    } drawpix;
 183
 184    /** for glClear */
 185    struct {
 186       struct pipe_rasterizer_state raster;
 187       struct pipe_viewport_state viewport;
 188       void *vs;
 189       void *fs;
 190       void *vs_layered;
 191       void *gs_layered;
 192    } clear;
 193
 194    /** used for anything using util_draw_vertex_buffer */
 195    struct pipe_vertex_element velems_util_draw[3];
 196
 197    void *passthrough_fs;  /**< simple pass-through frag shader */
 198
 199    enum pipe_texture_target internal_target;
 200
 201    struct cso_context *cso_context;
 202
 203    void *winsys_drawable_handle;
 204
 205    /* The number of vertex buffers from the last call of validate_arrays. */
 206    unsigned last_num_vbuffers;
 207
 208    int32_t draw_stamp;
 209    int32_t read_stamp;
 210
 211    struct st_config_options options;
 212 };
 213
 214
 215 /* Need this so that we can implement Mesa callbacks in this module.
 216  */
 217 static inline struct st_context *st_context(struct gl_context *ctx)
 218 {
 219    return ctx->st;
 220 }
 221
 222
 223 /**
 224  * Wrapper for struct gl_framebuffer.
 225  * This is an opaque type to the outside world.
 226  */
 227 struct st_framebuffer
 228 {
 229    struct gl_framebuffer Base;
 230    void *Private;
 231
 232    struct st_framebuffer_iface *iface;
 233    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 234    unsigned num_statts;
 235    int32_t stamp;
 236    int32_t iface_stamp;
 237 };
 238
 239
 240 extern void st_init_driver_functions(struct pipe_screen *screen,
 241                                      struct dd_function_table *functions);
 242
 243 void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
 244
 245
 246
 247 #define Y_0_TOP 1
 248 #define Y_0_BOTTOM 2
 249
 250 static inline GLuint
 251 st_fb_orientation(const struct gl_framebuffer *fb)
 252 {
 253    if (fb && _mesa_is_winsys_fbo(fb)) {
 254       /* Drawing into a window (on-screen buffer).
 255        *
 256        * Negate Y scale to flip image vertically.
 257        * The NDC Y coords prior to viewport transformation are in the range
 258        * [y=-1=bottom, y=1=top]
 259        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 260        * H is the window height.
 261        * Use the viewport transformation to invert Y.
 262        */
 263       return Y_0_TOP;
 264    }
 265    else {
 266       /* Drawing into user-created FBO (very likely a texture).
 267        *
 268        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 269        */
 270       return Y_0_BOTTOM;
 271    }
 272 }
 273
 274
 275 /** clear-alloc a struct-sized object, with casting */
 276 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 277
 278
 279 extern struct st_context *
 280 st_create_context(gl_api api, struct pipe_context *pipe,
 281                   const struct gl_config *visual,
 282                   struct st_context *share,
 283                   const struct st_config_options *options);
 284
 285 extern void
 286 st_destroy_context(struct st_context *st);
 287
 288
 289 #ifdef __cplusplus
 290 }
 291 #endif
 292
 293 #endif