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 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  50 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  51 #define ST_NEW_VERTEX_PROGRAM          0x4
  52 #define ST_NEW_FRAMEBUFFER             0x8
  53 #define ST_NEW_EDGEFLAGS_DATA          0x10
  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    GLcontext *ctx;
  74
  75    struct pipe_context *pipe;
  76
  77    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
  78    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
  79    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  80    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
  81
  82
  83    /* On old libGL's for linux we need to invalidate the drawables
  84     * on glViewpport calls, this is set via a option.
  85     */
  86    boolean invalidate_on_gl_viewport;
  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_resource *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       unsigned sample_mask;
 104
 105       GLuint num_samplers;
 106       GLuint num_textures;
 107
 108       GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
 109    } state;
 110
 111    struct {
 112       struct st_tracked_state tracked_state[PIPE_SHADER_TYPES];
 113    } constants;
 114
 115    /* XXX unused: */
 116    struct {
 117       struct gl_fragment_program *fragment_program;
 118    } cb;
 119
 120    char vendor[100];
 121    char renderer[100];
 122
 123    struct st_state_flags dirty;
 124
 125    GLboolean missing_textures;
 126    GLboolean vertdata_edgeflags;
 127
 128    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
 129    const GLuint *vertex_result_to_slot;
 130
 131    struct st_vertex_program *vp;    /**< Currently bound vertex program */
 132    struct st_fragment_program *fp;  /**< Currently bound fragment program */
 133
 134    struct st_vp_varient *vp_varient;
 135
 136    struct gl_texture_object *default_texture;
 137
 138    struct {
 139       struct gl_program_cache *cache;
 140       struct st_fragment_program *program;  /**< cur pixel transfer prog */
 141       GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
 142       GLuint user_prog_sn;  /**< user fragment program serial no. */
 143       struct st_fragment_program *combined_prog;
 144       GLuint combined_prog_sn;
 145       struct pipe_resource *pixelmap_texture;
 146       struct pipe_sampler_view *pixelmap_sampler_view;
 147       boolean pixelmap_enabled;  /**< use the pixelmap texture? */
 148    } pixel_xfer;
 149
 150    /** for glBitmap */
 151    struct {
 152       struct pipe_rasterizer_state rasterizer;
 153       struct pipe_sampler_state sampler;
 154       enum pipe_format tex_format;
 155       void *vs;
 156       float vertices[4][3][4];  /**< vertex pos + color + texcoord */
 157       struct pipe_resource *vbuf;
 158       unsigned vbuf_slot;       /* next free slot in vbuf */
 159       struct bitmap_cache *cache;
 160    } bitmap;
 161
 162    /** for glDraw/CopyPixels */
 163    struct {
 164       struct st_fragment_program *z_shader;
 165       void *vert_shaders[2];   /**< ureg shaders */
 166    } drawpix;
 167
 168    /** for glClear */
 169    struct {
 170       struct pipe_rasterizer_state raster;
 171       struct pipe_viewport_state viewport;
 172       struct pipe_clip_state clip;
 173       void *vs;
 174       void *fs;
 175       float vertices[4][2][4];  /**< vertex pos + color */
 176       struct pipe_resource *vbuf;
 177       unsigned vbuf_slot;
 178       boolean enable_ds_separate;
 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
 213    struct st_framebuffer_iface *iface;
 214    enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
 215    unsigned num_statts;
 216    int32_t revalidate;
 217 };
 218
 219
 220 extern void st_init_driver_functions(struct dd_function_table *functions);
 221
 222 void st_invalidate_state(GLcontext * ctx, GLuint new_state);
 223
 224
 225
 226 #define Y_0_TOP 1
 227 #define Y_0_BOTTOM 2
 228
 229 static INLINE GLuint
 230 st_fb_orientation(const struct gl_framebuffer *fb)
 231 {
 232    if (fb && fb->Name == 0) {
 233       /* Drawing into a window (on-screen buffer).
 234        *
 235        * Negate Y scale to flip image vertically.
 236        * The NDC Y coords prior to viewport transformation are in the range
 237        * [y=-1=bottom, y=1=top]
 238        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 239        * H is the window height.
 240        * Use the viewport transformation to invert Y.
 241        */
 242       return Y_0_TOP;
 243    }
 244    else {
 245       /* Drawing into user-created FBO (very likely a texture).
 246        *
 247        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 248        */
 249       return Y_0_BOTTOM;
 250    }
 251 }
 252
 253
 254 /** clear-alloc a struct-sized object, with casting */
 255 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
 256
 257
 258 extern int
 259 st_get_msaa(void);
 260
 261 extern struct st_context *
 262 st_create_context(struct pipe_context *pipe, const __GLcontextModes *visual,
 263                   struct st_context *share);
 264
 265 extern void
 266 st_destroy_context(struct st_context *st);
 267
 268
 269 #endif