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
  35 struct bitmap_cache;
  36 struct blit_state;
  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
  44
  45 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  46 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  47 #define ST_NEW_VERTEX_PROGRAM          0x4
  48 #define ST_NEW_FRAMEBUFFER             0x8
  49 #define ST_NEW_EDGEFLAGS_DATA          0x10
  50 #define ST_NEW_GEOMETRY_PROGRAM        0x20
  51
  52
  53 struct st_state_flags {
  54    GLuint mesa;
  55    GLuint st;
  56 };
  57
  58 struct st_tracked_state {
  59    const char *name;
  60    struct st_state_flags dirty;
  61    void (*update)( struct st_context *st );
  62 };
  63
  64
  65
  66 struct st_context
  67 {
  68    struct st_context_iface iface;
  69
  70    struct gl_context *ctx;
  71
  72    struct pipe_context *pipe;
  73
  74    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  75    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  76    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  77    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  78
  79
  80    /* On old libGL's for linux we need to invalidate the drawables
  81     * on glViewpport calls, this is set via a option.
  82     */
  83    boolean invalidate_on_gl_viewport;
  84
  85    /* Some state is contained in constant objects.
  86     * Other state is just parameter values.
  87     */
  88    struct {
  89       struct pipe_blend_state               blend;
  90       struct pipe_depth_stencil_alpha_state depth_stencil;
  91       struct pipe_rasterizer_state          rasterizer;
  92       struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
  93       struct pipe_sampler_state             vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
  94       struct pipe_clip_state clip;
  95       struct {
  96          void *ptr;
  97          unsigned size;
  98       } constants[PIPE_SHADER_TYPES];
  99       struct pipe_framebuffer_state framebuffer;
 100       struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
 101       struct pipe_sampler_view *sampler_vertex_views[PIPE_MAX_VERTEX_SAMPLERS];
 102       struct pipe_scissor_state scissor;
 103       struct pipe_viewport_state viewport;
 104       unsigned sample_mask;
 105
 106       GLuint num_samplers;
 107       GLuint num_vertex_samplers;
 108       GLuint num_textures;
 109       GLuint num_vertex_textures;
 110
 111       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 112    } state;
 113
 114    char vendor[100];
 115    char renderer[100];
 116
 117    struct st_state_flags dirty;
 118
 119    GLboolean missing_textures;
 120    GLboolean vertdata_edgeflags;
 121
 122    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 123    const GLuint *vertex_result_to_slot;
 124
 125    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 126    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 127    struct st_geometry_program *gp;  /**< Currently bound geometry program */
 128
 129    struct st_vp_variant *vp_variant;
 130    struct st_fp_variant *fp_variant;
 131    struct st_gp_variant *gp_variant;
 132
 133    struct gl_texture_object *default_texture;
 134
 135    struct {
 136       struct gl_program_cache *cache;
 137       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 138       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 139       GLuint user_prog_sn;  /**< user fragment program serial no. */
 140       struct st_fragment_program *combined_prog;
 141       GLuint combined_prog_sn;
 142       struct pipe_resource *pixelmap_texture;
 143       struct pipe_sampler_view *pixelmap_sampler_view;
 144       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 145    } pixel_xfer;
 146
 147    /** for glBitmap */
 148    struct {
 149       struct pipe_rasterizer_state rasterizer;
 150       struct pipe_sampler_state samplers[2];
 151       enum pipe_format tex_format;
 152       void *vs;
 153       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 154       struct pipe_resource *vbuf;
 155       unsigned vbuf_slot;       /* next free slot in vbuf */
 156       struct bitmap_cache *cache;
 157    } bitmap;
 158
 159    /** for glDraw/CopyPixels */
 160    struct {
 161       struct gl_fragment_program *shaders[4];
 162       void *vert_shaders[2];   /**< ureg shaders */
 163    } drawpix;
 164
 165    /** for glClear */
 166    struct {
 167       struct pipe_rasterizer_state raster;
 168       struct pipe_viewport_state viewport;
 169       struct pipe_clip_state clip;
 170       void *vs;
 171       void *fs;
 172       float vertices[4][2][4];  /**< vertex pos + color */
 173       struct pipe_resource *vbuf;
 174       unsigned vbuf_slot;
 175       boolean enable_ds_separate;
 176    } clear;
 177
 178    /** used for anything using util_draw_vertex_buffer */
 179    struct pipe_vertex_element velems_util_draw[3];
 180
 181    void *passthrough_fs;  /**< simple pass-through frag shader */
 182
 183    enum pipe_texture_target internal_target;
 184    struct gen_mipmap_state *gen_mipmap;
 185    struct blit_state *blit;
 186
 187    struct cso_context *cso_context;
 188
 189    int force_msaa;
 190    void *winsys_drawable_handle;
 191
 192    /* User vertex buffers. */
 193    struct {
 194       struct pipe_resource *buffer;
 195
 196       /** Element size */
 197       GLuint element_size;
 198
 199       /** Attribute stride */
 200       GLsizei stride;
 201    } user_attrib[PIPE_MAX_ATTRIBS];
 202    unsigned num_user_attribs;
 203
 204    /* Active render condition. */
 205    struct pipe_query *render_condition;
 206    unsigned condition_mode;
 207 };
 208
 209
 210 /* Need this so that we can implement Mesa callbacks in this module.
 211  */
 212 static INLINE struct st_context *st_context(struct gl_context *ctx)
 213 {
 214    return ctx->st;
 215 }
 216
 217
 218 /**
 219  * Wrapper for struct gl_framebuffer.
 220  * This is an opaque type to the outside world.
 221  */
 222 struct st_framebuffer
 223 {
 224    struct gl_framebuffer Base;
 225    void *Private;
 226
 227    struct st_framebuffer_iface *iface;
 228    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 229    unsigned num_statts;
 230    int32_t revalidate;
 231 };
 232
 233
 234 extern void st_init_driver_functions(struct dd_function_table *functions);
 235
 236 void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
 237
 238
 239
 240 #define Y_0_TOP 1
 241 #define Y_0_BOTTOM 2
 242
 243 static INLINE GLuint
 244 st_fb_orientation(const struct gl_framebuffer *fb)
 245 {
 246    if (fb && fb->Name == 0) {
 247       /* Drawing into a window (on-screen buffer).
 248        *
 249        * Negate Y scale to flip image vertically.
 250        * The NDC Y coords prior to viewport transformation are in the range
 251        * [y=-1=bottom, y=1=top]
 252        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 253        * H is the window height.
 254        * Use the viewport transformation to invert Y.
 255        */
 256       return Y_0_TOP;
 257    }
 258    else {
 259       /* Drawing into user-created FBO (very likely a texture).
 260        *
 261        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 262        */
 263       return Y_0_BOTTOM;
 264    }
 265 }
 266
 267
 268 /** clear-alloc a struct-sized object, with casting */
 269 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 270
 271
 272 extern int
 273 st_get_msaa(void);
 274
 275 extern struct st_context *
 276 st_create_context(gl_api api, struct pipe_context *pipe,
 277                   const struct gl_config *visual,
 278                   struct st_context *share);
 279
 280 extern void
 281 st_destroy_context(struct st_context *st);
 282
 283
 284 #endif