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 "pipe/p_state.h"
  33 #include "state_tracker/st_api.h"
  34 #include "main/fbobject.h"
  35
  36 struct bitmap_cache;
  37 struct dd_function_table;
  38 struct draw_context;
  39 struct draw_stage;
  40 struct gen_mipmap_state;
  41 struct st_context;
  42 struct st_fragment_program;
  43 struct u_upload_mgr;
  44
  45
  46 #define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
  47 #define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)
  48 #define ST_NEW_VERTEX_PROGRAM          (1 << 2)
  49 #define ST_NEW_FRAMEBUFFER             (1 << 3)
  50 #define ST_NEW_EDGEFLAGS_DATA          (1 << 4)
  51 #define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)
  52 #define ST_NEW_VERTEX_ARRAYS           (1 << 6)
  53
  54
  55 struct st_state_flags {
  56    GLuint mesa;
  57    GLuint st;
  58 };
  59
  60 struct st_tracked_state {
  61    const char *name;
  62    struct st_state_flags dirty;
  63    void (*update)( struct st_context *st );
  64 };
  65
  66
  67
  68 struct st_context
  69 {
  70    struct st_context_iface iface;
  71
  72    struct gl_context *ctx;
  73
  74    struct pipe_context *pipe;
  75
  76    struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
  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    GLboolean clamp_frag_color_in_shader;
  83    GLboolean clamp_vert_color_in_shader;
  84    boolean has_stencil_export; /**< can do shader stencil export? */
  85    boolean has_time_elapsed;
  86    boolean has_shader_model3;
  87
  88    boolean needs_texcoord_semantic;
  89
  90    /* On old libGL's for linux we need to invalidate the drawables
  91     * on glViewpport calls, this is set via a option.
  92     */
  93    boolean invalidate_on_gl_viewport;
  94
  95    boolean vertex_array_out_of_memory;
  96
  97    /* Some state is contained in constant objects.
  98     * Other state is just parameter values.
  99     */
 100    struct {
 101       struct pipe_blend_state               blend;
 102       struct pipe_depth_stencil_alpha_state depth_stencil;
 103       struct pipe_rasterizer_state          rasterizer;
 104       struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 105       GLuint num_samplers[PIPE_SHADER_TYPES];
 106       struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
 107       GLuint num_sampler_views[PIPE_SHADER_TYPES];
 108       struct pipe_clip_state clip;
 109       struct {
 110          void *ptr;
 111          unsigned size;
 112       } constants[PIPE_SHADER_TYPES];
 113       struct pipe_framebuffer_state framebuffer;
 114       struct pipe_scissor_state scissor;
 115       struct pipe_viewport_state viewport;
 116       unsigned sample_mask;
 117
 118       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 119
 120       GLuint fb_orientation;
 121    } state;
 122
 123    char vendor[100];
 124    char renderer[100];
 125
 126    struct st_state_flags dirty;
 127
 128    GLboolean missing_textures;
 129    GLboolean vertdata_edgeflags;
 130
 131    /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */
 132    const GLuint *vertex_result_to_slot;
 133
 134    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 135    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 136    struct st_geometry_program *gp;  /**< Currently bound geometry program */
 137
 138    struct st_vp_variant *vp_variant;
 139    struct st_fp_variant *fp_variant;
 140    struct st_gp_variant *gp_variant;
 141
 142    struct gl_texture_object *default_texture;
 143
 144    struct {
 145       struct gl_program_cache *cache;
 146       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 147       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 148       GLuint user_prog_sn;  /**< user fragment program serial no. */
 149       struct st_fragment_program *combined_prog;
 150       GLuint combined_prog_sn;
 151       struct pipe_resource *pixelmap_texture;
 152       struct pipe_sampler_view *pixelmap_sampler_view;
 153       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 154    } pixel_xfer;
 155
 156    /** for glBitmap */
 157    struct {
 158       struct pipe_rasterizer_state rasterizer;
 159       struct pipe_sampler_state samplers[2];
 160       enum pipe_format tex_format;
 161       void *vs;
 162       struct bitmap_cache *cache;
 163    } bitmap;
 164
 165    /** for glDraw/CopyPixels */
 166    struct {
 167       struct gl_fragment_program *shaders[4];
 168       void *vert_shaders[2];   /**< ureg shaders */
 169    } drawpix;
 170
 171    /** for glClear */
 172    struct {
 173       struct pipe_rasterizer_state raster;
 174       struct pipe_viewport_state viewport;
 175       void *vs;
 176       void *fs;
 177    } clear;
 178
 179    /** used for anything using util_draw_vertex_buffer */
 180    struct pipe_vertex_element velems_util_draw[3];
 181
 182    void *passthrough_fs;  /**< simple pass-through frag shader */
 183
 184    enum pipe_texture_target internal_target;
 185    struct gen_mipmap_state *gen_mipmap;
 186
 187    struct cso_context *cso_context;
 188
 189    void *winsys_drawable_handle;
 190
 191    /* The number of vertex buffers from the last call of validate_arrays. */
 192    unsigned last_num_vbuffers;
 193
 194    int32_t draw_stamp;
 195    int32_t read_stamp;
 196
 197    struct st_config_options options;
 198 };
 199
 200
 201 /* Need this so that we can implement Mesa callbacks in this module.
 202  */
 203 static INLINE struct st_context *st_context(struct gl_context *ctx)
 204 {
 205    return ctx->st;
 206 }
 207
 208
 209 /**
 210  * Wrapper for struct gl_framebuffer.
 211  * This is an opaque type to the outside world.
 212  */
 213 struct st_framebuffer
 214 {
 215    struct gl_framebuffer Base;
 216    void *Private;
 217
 218    struct st_framebuffer_iface *iface;
 219    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 220    unsigned num_statts;
 221    int32_t stamp;
 222    int32_t iface_stamp;
 223 };
 224
 225
 226 extern void st_init_driver_functions(struct dd_function_table *functions);
 227
 228 void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
 229
 230
 231
 232 #define Y_0_TOP 1
 233 #define Y_0_BOTTOM 2
 234
 235 static INLINE GLuint
 236 st_fb_orientation(const struct gl_framebuffer *fb)
 237 {
 238    if (fb && _mesa_is_winsys_fbo(fb)) {
 239       /* Drawing into a window (on-screen buffer).
 240        *
 241        * Negate Y scale to flip image vertically.
 242        * The NDC Y coords prior to viewport transformation are in the range
 243        * [y=-1=bottom, y=1=top]
 244        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 245        * H is the window height.
 246        * Use the viewport transformation to invert Y.
 247        */
 248       return Y_0_TOP;
 249    }
 250    else {
 251       /* Drawing into user-created FBO (very likely a texture).
 252        *
 253        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 254        */
 255       return Y_0_BOTTOM;
 256    }
 257 }
 258
 259
 260 /** clear-alloc a struct-sized object, with casting */
 261 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 262
 263
 264 extern struct st_context *
 265 st_create_context(gl_api api, struct pipe_context *pipe,
 266                   const struct gl_config *visual,
 267                   struct st_context *share,
 268                   const struct st_config_options *options);
 269
 270 extern void
 271 st_destroy_context(struct st_context *st);
 272
 273
 274 #endif