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