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