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