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 "shader/prog_cache.h"
  33 #include "pipe/p_state.h"
  34 #include "state_tracker/st_api.h"
  35
  36
  37 struct st_context;
  38 struct st_texture_object;
  39 struct st_fragment_program;
  40 struct draw_context;
  41 struct draw_stage;
  42 struct cso_cache;
  43 struct cso_blend;
  44 struct gen_mipmap_state;
  45 struct blit_state;
  46 struct bitmap_cache;
  47
  48
  49 /** XXX we'd like to get rid of these */
  50 #define FRONT_STATUS_UNDEFINED    0
  51 #define FRONT_STATUS_DIRTY        1
  52 #define FRONT_STATUS_COPY_OF_BACK 2
  53
  54
  55 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  56 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  57 #define ST_NEW_VERTEX_PROGRAM          0x4
  58 #define ST_NEW_FRAMEBUFFER             0x8
  59 #define ST_NEW_EDGEFLAGS_DATA          0x10
  60
  61
  62 struct st_state_flags {
  63    GLuint mesa;
  64    GLuint st;
  65 };
  66
  67 struct st_tracked_state {
  68    const char *name;
  69    struct st_state_flags dirty;
  70    void (*update)( struct st_context *st );
  71 };
  72
  73
  74
  75 struct st_context
  76 {
  77    struct st_context_iface iface;
  78
  79    GLcontext *ctx;
  80
  81    struct pipe_context *pipe;
  82
  83    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  84    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  85    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  86    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  87
  88    /* Some state is contained in constant objects.
  89     * Other state is just parameter values.
  90     */
  91    struct {
  92       struct pipe_blend_state               blend;
  93       struct pipe_depth_stencil_alpha_state depth_stencil;
  94       struct pipe_rasterizer_state          rasterizer;
  95       struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
  96       struct pipe_sampler_state             *sampler_list[PIPE_MAX_SAMPLERS];
  97       struct pipe_clip_state clip;
  98       struct pipe_buffer *constants[2];
  99       struct pipe_framebuffer_state framebuffer;
 100       struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
 101       struct pipe_scissor_state scissor;
 102       struct pipe_viewport_state viewport;
 103
 104       GLuint num_samplers;
 105       GLuint num_textures;
 106
 107       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 108    } state;
 109
 110    struct {
 111       struct st_tracked_state tracked_state[PIPE_SHADER_TYPES];
 112    } constants;
 113
 114    /* XXX unused: */
 115    struct {
 116       struct gl_fragment_program *fragment_program;
 117    } cb;
 118
 119    GLuint frontbuffer_status;  /**< one of FRONT_STATUS_ (XXX to be removed) */
 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 VERT_RESULT_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
 135    struct st_vp_varient *vp_varient;
 136
 137    struct gl_texture_object *default_texture;
 138
 139    struct {
 140       struct gl_program_cache *cache;
 141       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 142       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 143       GLuint user_prog_sn;  /**< user fragment program serial no. */
 144       struct st_fragment_program *combined_prog;
 145       GLuint combined_prog_sn;
 146       struct pipe_texture *pixelmap_texture;
 147       struct pipe_sampler_view *pixelmap_sampler_view;
 148       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 149    } pixel_xfer;
 150
 151    /** for glBitmap */
 152    struct {
 153       struct pipe_rasterizer_state rasterizer;
 154       struct pipe_sampler_state sampler;
 155       enum pipe_format tex_format;
 156       void *vs;
 157       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 158       struct pipe_buffer *vbuf;
 159       unsigned vbuf_slot;       /* next free slot in vbuf */
 160       struct bitmap_cache *cache;
 161    } bitmap;
 162
 163    /** for glDraw/CopyPixels */
 164    struct {
 165       struct st_fragment_program *z_shader;
 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       struct pipe_clip_state clip;
 174       void *vs;
 175       void *fs;
 176       float vertices[4][2][4];  /**< vertex pos + color */
 177       struct pipe_buffer *vbuf;
 178       unsigned vbuf_slot;
 179    } clear;
 180
 181    /** used for anything using util_draw_vertex_buffer */
 182    struct pipe_vertex_element velems_util_draw[3];
 183
 184    void *passthrough_fs;  /**< simple pass-through frag shader */
 185
 186    struct gen_mipmap_state *gen_mipmap;
 187    struct blit_state *blit;
 188
 189    struct cso_context *cso_context;
 190
 191    int force_msaa;
 192    void *winsys_drawable_handle;
 193 };
 194
 195
 196 /* Need this so that we can implement Mesa callbacks in this module.
 197  */
 198 static INLINE struct st_context *st_context(GLcontext *ctx)
 199 {
 200    return ctx->st;
 201 }
 202
 203
 204 /**
 205  * Wrapper for GLframebuffer.
 206  * This is an opaque type to the outside world.
 207  */
 208 struct st_framebuffer
 209 {
 210    GLframebuffer Base;
 211    void *Private;
 212    GLuint InitWidth, InitHeight;
 213
 214    struct st_framebuffer_iface *iface;
 215    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 216    unsigned num_statts;
 217    int32_t revalidate;
 218 };
 219
 220
 221 extern void st_init_driver_functions(struct dd_function_table *functions);
 222
 223 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 224
 225
 226
 227 #define Y_0_TOP 1
 228 #define Y_0_BOTTOM 2
 229
 230 static INLINE GLuint
 231 st_fb_orientation(const struct gl_framebuffer *fb)
 232 {
 233    if (fb && fb->Name == 0) {
 234       /* Drawing into a window (on-screen buffer).
 235        *
 236        * Negate Y scale to flip image vertically.
 237        * The NDC Y coords prior to viewport transformation are in the range
 238        * [y=-1=bottom, y=1=top]
 239        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 240        * H is the window height.
 241        * Use the viewport transformation to invert Y.
 242        */
 243       return Y_0_TOP;
 244    }
 245    else {
 246       /* Drawing into user-created FBO (very likely a texture).
 247        *
 248        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 249        */
 250       return Y_0_BOTTOM;
 251    }
 252 }
 253
 254
 255 /** clear-alloc a struct-sized object, with casting */
 256 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 257
 258
 259 extern int
 260 st_get_msaa(void);
 261
 262
 263 #endif