src/mesa/main/dd.h

   1 /**
   2  * \file dd.h
   3  * Device driver interfaces.
   4  */
   5
   6 /*
   7  * Mesa 3-D graphics library
   8  * Version:  4.1
   9  *
  10  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included
  20  * in all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  23  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  26  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  27  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29
  30
  31 #ifndef DD_INCLUDED
  32 #define DD_INCLUDED
  33
  34 /* THIS FILE ONLY INCLUDED BY mtypes.h !!!!! */
  35
  36 struct gl_pixelstore_attrib;
  37
  38 /* Mask bits sent to the driver Clear() function */
  39 #define DD_FRONT_LEFT_BIT  FRONT_LEFT_BIT         /* 1 */
  40 #define DD_FRONT_RIGHT_BIT FRONT_RIGHT_BIT        /* 2 */
  41 #define DD_BACK_LEFT_BIT   BACK_LEFT_BIT          /* 4 */
  42 #define DD_BACK_RIGHT_BIT  BACK_RIGHT_BIT         /* 8 */
  43 #define DD_AUX0            AUX0_BIT               /* future use */
  44 #define DD_AUX1            AUX1_BIT               /* future use */
  45 #define DD_AUX2            AUX2_BIT               /* future use */
  46 #define DD_AUX3            AUX3_BIT               /* future use */
  47 #define DD_DEPTH_BIT       GL_DEPTH_BUFFER_BIT    /* 0x00000100 */
  48 #define DD_ACCUM_BIT       GL_ACCUM_BUFFER_BIT    /* 0x00000200 */
  49 #define DD_STENCIL_BIT     GL_STENCIL_BUFFER_BIT  /* 0x00000400 */
  50
  51
  52 /**
  53  * Device driver function table.
  54  * Core Mesa uses these function pointers to call into device drivers.
  55  * Most of these functions directly correspond to OpenGL state commands.
  56  * Core Mesa will call these functions after error checking has been done
  57  * so that the drivers don't have to worry about error testing.
  58  *
  59  * Vertex transformation/clipping/lighting is patched into the T&L module.
  60  * Rasterization functions are patched into the swrast module.
  61  */
  62 struct dd_function_table {
  63    /**
  64     * Return a string as needed by glGetString().
  65     *
  66     * Only the GL_RENDERER token must be implemented.  Otherwise, NULL can be
  67     * returned.
  68     */
  69    const GLubyte * (*GetString)( GLcontext *ctx, GLenum name );
  70
  71    /**
  72     * Notify the driver after Mesa has made some internal state changes.
  73     *
  74     * This is in addition to any state change callbacks Mesa may already have
  75     * made.
  76     */
  77    void (*UpdateState)( GLcontext *ctx, GLuint new_state );
  78
  79    /**
  80     * Clear the color/depth/stencil/accum buffer(s).
  81     *
  82     * \param mask a bitmask of the DD_*_BIT values defined above that indicates
  83     * which buffers need to be cleared.
  84     * \param all if true then clear the whole buffer, else clear only the
  85     * region defined by <tt>(x, y, width, height)</tt>.
  86     *
  87     * This function must obey the glColorMask(), glIndexMask() and glStencilMask()
  88     * settings!
  89     * Software Mesa can do masked clears if the device driver can't.
  90     */
  91    void (*Clear)( GLcontext *ctx, GLbitfield mask, GLboolean all,
  92                   GLint x, GLint y, GLint width, GLint height );
  93
  94    /**
  95     * Specify the current buffer for writing.
  96     *
  97     * Called via glDrawBuffer().  Note the driver must organize fallbacks (e.g.
  98     * with swrast) if it cannot implement the requested mode.
  99     */
 100    void (*DrawBuffer)( GLcontext *ctx, GLenum buffer );
 101
 102    /**
 103     * Specifies the current buffer for reading.
 104     *
 105     * Called via glReadBuffer().
 106     */
 107    void (*ReadBuffer)( GLcontext *ctx, GLenum buffer );
 108
 109    /**
 110     * Get the width and height of the named buffer/window.
 111     *
 112     * Mesa uses this to determine when the driver's window size has changed.
 113     */
 114    void (*GetBufferSize)( GLframebuffer *buffer,
 115                           GLuint *width, GLuint *height );
 116
 117    /**
 118     * Resize the driver's depth/stencil/accum/back buffers to match the
 119     * size given in the GLframebuffer struct.
 120     *
 121     * This is typically called when Mesa detects that a window size has changed.
 122     */
 123    void (*ResizeBuffers)( GLframebuffer *buffer );
 124
 125    /**
 126     * This is called whenever glFinish() is called.
 127     */
 128    void (*Finish)( GLcontext *ctx );
 129
 130    /**
 131     * This is called whenever glFlush() is called.
 132     */
 133    void (*Flush)( GLcontext *ctx );
 134
 135    /**
 136     * Called whenever an error is generated.
 137     *
 138     * __GLcontextRec::ErrorValue contains the error value.
 139     */
 140    void (*Error)( GLcontext *ctx );
 141
 142
 143    /**
 144     * \name For hardware accumulation buffer
 145     */
 146    /*@{*/
 147    /**
 148     * Execute glAccum command within the given scissor region.
 149     */
 150    void (*Accum)( GLcontext *ctx, GLenum op, GLfloat value,
 151                   GLint xpos, GLint ypos, GLint width, GLint height );
 152    /*@}*/
 153
 154
 155    /**
 156     * \name glDraw(), glRead(), glCopyPixels() and glBitmap() functions
 157     */
 158    /*@{*/
 159
 160    /**
 161     * This is called by glDrawPixels().
 162     *
 163     * \p unpack describes how to unpack the source image data.
 164     */
 165    void (*DrawPixels)( GLcontext *ctx,
 166                        GLint x, GLint y, GLsizei width, GLsizei height,
 167                        GLenum format, GLenum type,
 168                        const struct gl_pixelstore_attrib *unpack,
 169                        const GLvoid *pixels );
 170
 171    /**
 172     * Called by glReadPixels().
 173     */
 174    void (*ReadPixels)( GLcontext *ctx,
 175                        GLint x, GLint y, GLsizei width, GLsizei height,
 176                        GLenum format, GLenum type,
 177                        const struct gl_pixelstore_attrib *unpack,
 178                        GLvoid *dest );
 179
 180    /**
 181     * Do a glCopyPixels().
 182     *
 183     * This function must respect all rasterization state, glPixelTransfer(),
 184     * glPixelZoom(), etc.
 185     */
 186    void (*CopyPixels)( GLcontext *ctx,
 187                             GLint srcx, GLint srcy,
 188                             GLsizei width, GLsizei height,
 189                             GLint dstx, GLint dsty, GLenum type );
 190
 191    /**
 192     * This is called by glBitmap().
 193     *
 194     * Works the same as dd_function_table::DrawPixels, above.
 195     */
 196    void (*Bitmap)( GLcontext *ctx,
 197                    GLint x, GLint y, GLsizei width, GLsizei height,
 198                    const struct gl_pixelstore_attrib *unpack,
 199                    const GLubyte *bitmap );
 200    /*@}*/
 201
 202
 203    /**
 204     * \name Texture image functions
 205     */
 206    /*@{*/
 207
 208    /**
 209     * Choose texture format.
 210     *
 211     * This is called by the \c _mesa_store_tex[sub]image[123]d() fallback
 212     * functions.  The driver should examine \p internalFormat and return a
 213     * pointer to an appropriate gl_texture_format.
 214     */
 215    const struct gl_texture_format *
 216    (*ChooseTextureFormat)( GLcontext *ctx, GLint internalFormat,
 217                            GLenum srcFormat, GLenum srcType );
 218
 219    /**
 220     * Called by glTexImage1D().
 221     *
 222     * \param target user specified.
 223     * \param format user specified.
 224     * \param type user specified.
 225     * \param pixels user specified.
 226     * \param packing indicates the image packing of pixels.
 227     * \param texObj is the target texture object.
 228     * \param texImage is the target texture image.  It will have the texture \p
 229     * width, \p height, \p depth, \p border and \p internalFormat information.
 230     *
 231     * \p retainInternalCopy is returned by this function and indicates whether
 232     * core Mesa should keep an internal copy of the texture image.
 233     *
 234     * Drivers should call a fallback routine from texstore.c if needed.
 235     */
 236    void (*TexImage1D)( GLcontext *ctx, GLenum target, GLint level,
 237                        GLint internalFormat,
 238                        GLint width, GLint border,
 239                        GLenum format, GLenum type, const GLvoid *pixels,
 240                        const struct gl_pixelstore_attrib *packing,
 241                        struct gl_texture_object *texObj,
 242                        struct gl_texture_image *texImage );
 243
 244    /**
 245     * Called by glTexImage2D().
 246     *
 247     * \sa dd_function_table::TexImage1D.
 248     */
 249    void (*TexImage2D)( GLcontext *ctx, GLenum target, GLint level,
 250                        GLint internalFormat,
 251                        GLint width, GLint height, GLint border,
 252                        GLenum format, GLenum type, const GLvoid *pixels,
 253                        const struct gl_pixelstore_attrib *packing,
 254                        struct gl_texture_object *texObj,
 255                        struct gl_texture_image *texImage );
 256
 257    /**
 258     * Called by glTexImage3D().
 259     *
 260     * \sa dd_function_table::TexImage1D.
 261     */
 262    void (*TexImage3D)( GLcontext *ctx, GLenum target, GLint level,
 263                        GLint internalFormat,
 264                        GLint width, GLint height, GLint depth, GLint border,
 265                        GLenum format, GLenum type, const GLvoid *pixels,
 266                        const struct gl_pixelstore_attrib *packing,
 267                        struct gl_texture_object *texObj,
 268                        struct gl_texture_image *texImage );
 269
 270    /**
 271     * Called by glTexSubImage1D().
 272     *
 273     * \param target user specified.
 274     * \param level user specified.
 275     * \param xoffset user specified.
 276     * \param yoffset user specified.
 277     * \param zoffset user specified.
 278     * \param width user specified.
 279     * \param height user specified.
 280     * \param depth user specified.
 281     * \param format user specified.
 282     * \param type user specified.
 283     * \param pixels user specified.
 284     * \param packing indicates the image packing of pixels.
 285     * \param texObj is the target texture object.
 286     * \param texImage is the target texture image.  It will have the texture \p
 287     * width, \p height, \p border and \p internalFormat information.
 288     *
 289     * The driver should use a fallback routine from texstore.c if needed.
 290     */
 291    void (*TexSubImage1D)( GLcontext *ctx, GLenum target, GLint level,
 292                           GLint xoffset, GLsizei width,
 293                           GLenum format, GLenum type,
 294                           const GLvoid *pixels,
 295                           const struct gl_pixelstore_attrib *packing,
 296                           struct gl_texture_object *texObj,
 297                           struct gl_texture_image *texImage );
 298
 299    /**
 300     * Called by glTexSubImage2D().
 301     *
 302     * \sa dd_function_table::TexSubImage1D.
 303     */
 304    void (*TexSubImage2D)( GLcontext *ctx, GLenum target, GLint level,
 305                           GLint xoffset, GLint yoffset,
 306                           GLsizei width, GLsizei height,
 307                           GLenum format, GLenum type,
 308                           const GLvoid *pixels,
 309                           const struct gl_pixelstore_attrib *packing,
 310                           struct gl_texture_object *texObj,
 311                           struct gl_texture_image *texImage );
 312
 313    /**
 314     * Called by glTexSubImage3D().
 315     *
 316     * \sa dd_function_table::TexSubImage1D.
 317     */
 318    void (*TexSubImage3D)( GLcontext *ctx, GLenum target, GLint level,
 319                           GLint xoffset, GLint yoffset, GLint zoffset,
 320                           GLsizei width, GLsizei height, GLint depth,
 321                           GLenum format, GLenum type,
 322                           const GLvoid *pixels,
 323                           const struct gl_pixelstore_attrib *packing,
 324                           struct gl_texture_object *texObj,
 325                           struct gl_texture_image *texImage );
 326
 327    /**
 328     * Called by glCopyTexImage1D().
 329     *
 330     * Drivers should use a fallback routine from texstore.c if needed.
 331     */
 332    void (*CopyTexImage1D)( GLcontext *ctx, GLenum target, GLint level,
 333                            GLenum internalFormat, GLint x, GLint y,
 334                            GLsizei width, GLint border );
 335
 336    /**
 337     * Called by glCopyTexImage2D().
 338     *
 339     * Drivers should use a fallback routine from texstore.c if needed.
 340     */
 341    void (*CopyTexImage2D)( GLcontext *ctx, GLenum target, GLint level,
 342                            GLenum internalFormat, GLint x, GLint y,
 343                            GLsizei width, GLsizei height, GLint border );
 344
 345    /**
 346     * Called by glCopyTexSubImage1D().
 347     *
 348     * Drivers should use a fallback routine from texstore.c if needed.
 349     */
 350    void (*CopyTexSubImage1D)( GLcontext *ctx, GLenum target, GLint level,
 351                               GLint xoffset,
 352                               GLint x, GLint y, GLsizei width );
 353    /**
 354     * Called by glCopyTexSubImage2D().
 355     *
 356     * Drivers should use a fallback routine from texstore.c if needed.
 357     */
 358    void (*CopyTexSubImage2D)( GLcontext *ctx, GLenum target, GLint level,
 359                               GLint xoffset, GLint yoffset,
 360                               GLint x, GLint y,
 361                               GLsizei width, GLsizei height );
 362    /**
 363     * Called by glCopyTexSubImage3D().
 364     *
 365     * Drivers should use a fallback routine from texstore.c if needed.
 366     */
 367    void (*CopyTexSubImage3D)( GLcontext *ctx, GLenum target, GLint level,
 368                               GLint xoffset, GLint yoffset, GLint zoffset,
 369                               GLint x, GLint y,
 370                               GLsizei width, GLsizei height );
 371
 372    /**
 373     * Called by glTexImage[123]D when user specifies a proxy texture
 374     * target.
 375     *
 376     * \return GL_TRUE if the proxy test passes, or GL_FALSE if the test fails.
 377     */
 378    GLboolean (*TestProxyTexImage)(GLcontext *ctx, GLenum target,
 379                                   GLint level, GLint internalFormat,
 380                                   GLenum format, GLenum type,
 381                                   GLint width, GLint height,
 382                                   GLint depth, GLint border);
 383    /*@}*/
 384
 385
 386    /**
 387     * \name Compressed texture functions
 388     */
 389    /*@{*/
 390
 391    /**
 392     * Called by glCompressedTexImage1D().
 393     *
 394     * \param target user specified.
 395     * \param format user specified.
 396     * \param type user specified.
 397     * \param pixels user specified.
 398     * \param packing indicates the image packing of pixels.
 399     * \param texObj is the target texture object.
 400     * \param texImage is the target texture image.  It will have the texture \p
 401     * width, \p height, \p depth, \p border and \p internalFormat information.
 402     *
 403     * \a retainInternalCopy is returned by this function and indicates whether
 404     * core Mesa should keep an internal copy of the texture image.
 405     */
 406    void (*CompressedTexImage1D)( GLcontext *ctx, GLenum target,
 407                                  GLint level, GLint internalFormat,
 408                                  GLsizei width, GLint border,
 409                                  GLsizei imageSize, const GLvoid *data,
 410                                  struct gl_texture_object *texObj,
 411                                  struct gl_texture_image *texImage );
 412    /**
 413     * Called by glCompressedTexImage2D().
 414     *
 415     * \sa dd_function_table::CompressedTexImage1D.
 416     */
 417    void (*CompressedTexImage2D)( GLcontext *ctx, GLenum target,
 418                                  GLint level, GLint internalFormat,
 419                                  GLsizei width, GLsizei height, GLint border,
 420                                  GLsizei imageSize, const GLvoid *data,
 421                                  struct gl_texture_object *texObj,
 422                                  struct gl_texture_image *texImage );
 423    /**
 424     * Called by glCompressedTexImage3D().
 425     *
 426     * \sa dd_function_table::CompressedTexImage3D.
 427     */
 428    void (*CompressedTexImage3D)( GLcontext *ctx, GLenum target,
 429                                  GLint level, GLint internalFormat,
 430                                  GLsizei width, GLsizei height, GLsizei depth,
 431                                  GLint border,
 432                                  GLsizei imageSize, const GLvoid *data,
 433                                  struct gl_texture_object *texObj,
 434                                  struct gl_texture_image *texImage );
 435
 436    /**
 437     * Called by glCompressedTexSubImage1D().
 438     *
 439     * \param target user specified.
 440     * \param level user specified.
 441     * \param xoffset user specified.
 442     * \param yoffset user specified.
 443     * \param zoffset user specified.
 444     * \param width user specified.
 445     * \param height user specified.
 446     * \param depth user specified.
 447     * \param imageSize user specified.
 448     * \param data user specified.
 449     * \param texObj is the target texture object.
 450     * \param texImage is the target texture image.  It will have the texture \p
 451     * width, \p height, \p depth, \p border and \p internalFormat information.
 452     */
 453    void (*CompressedTexSubImage1D)(GLcontext *ctx, GLenum target, GLint level,
 454                                    GLint xoffset, GLsizei width,
 455                                    GLenum format,
 456                                    GLsizei imageSize, const GLvoid *data,
 457                                    struct gl_texture_object *texObj,
 458                                    struct gl_texture_image *texImage);
 459    /**
 460     * Called by glCompressedTexSubImage2D().
 461     *
 462     * \sa dd_function_table::CompressedTexImage3D.
 463     */
 464    void (*CompressedTexSubImage2D)(GLcontext *ctx, GLenum target, GLint level,
 465                                    GLint xoffset, GLint yoffset,
 466                                    GLsizei width, GLint height,
 467                                    GLenum format,
 468                                    GLsizei imageSize, const GLvoid *data,
 469                                    struct gl_texture_object *texObj,
 470                                    struct gl_texture_image *texImage);
 471    /**
 472     * Called by glCompressedTexSubImage3D().
 473     *
 474     * \sa dd_function_table::CompressedTexImage3D.
 475     */
 476    void (*CompressedTexSubImage3D)(GLcontext *ctx, GLenum target, GLint level,
 477                                    GLint xoffset, GLint yoffset, GLint zoffset,
 478                                    GLsizei width, GLint height, GLint depth,
 479                                    GLenum format,
 480                                    GLsizei imageSize, const GLvoid *data,
 481                                    struct gl_texture_object *texObj,
 482                                    struct gl_texture_image *texImage);
 483    /*@}*/
 484
 485    /**
 486     * \name Texture object functions
 487     */
 488    /*@{*/
 489
 490    /**
 491     * Called by glBindTexture().
 492     */
 493    void (*BindTexture)( GLcontext *ctx, GLenum target,
 494                         struct gl_texture_object *tObj );
 495
 496    /**
 497     * Called when a texture object is created.
 498     */
 499    void (*CreateTexture)( GLcontext *ctx, struct gl_texture_object *tObj );
 500
 501    /**
 502     * Called to allocate a new texture object.
 503     *
 504     * \note This function pointer should be initialized by drivers \e before
 505     * calling _mesa_initialize_context() since context initialization involves
 506     * allocating some texture objects!
 507     */
 508    struct gl_texture_object * (*NewTextureObject)( GLcontext *ctx, GLuint name,
 509                                                    GLenum target );
 510    /**
 511     * Called when a texture object is about to be deallocated.
 512     *
 513     * Driver should free anything attached to the DriverData pointers.
 514     */
 515    void (*DeleteTexture)( GLcontext *ctx, struct gl_texture_object *tObj );
 516
 517    /**
 518     * Called to allocate a new texture image object.
 519     */
 520    struct gl_texture_image * (*NewTextureImage)( GLcontext *ctx );
 521
 522    /**
 523     * Called by glAreTextureResident().
 524     */
 525    GLboolean (*IsTextureResident)( GLcontext *ctx,
 526                                    struct gl_texture_object *t );
 527
 528    /**
 529     * Called by glPrioritizeTextures().
 530     */
 531    void (*PrioritizeTexture)( GLcontext *ctx,  struct gl_texture_object *t,
 532                               GLclampf priority );
 533
 534    /**
 535     * Called by glActiveTextureARB() to set current texture unit.
 536     */
 537    void (*ActiveTexture)( GLcontext *ctx, GLuint texUnitNumber );
 538
 539    /**
 540     * Called when the texture's color lookup table is changed.
 541     *
 542     * If \p tObj is NULL then the shared texture palette
 543     * gl_texture_object::Palette is to be updated.
 544     */
 545    void (*UpdateTexturePalette)( GLcontext *ctx,
 546                                  struct gl_texture_object *tObj );
 547    /*@}*/
 548
 549
 550    /**
 551     * \name Imaging functionality
 552     */
 553    /*@{*/
 554    void (*CopyColorTable)( GLcontext *ctx,
 555                            GLenum target, GLenum internalformat,
 556                            GLint x, GLint y, GLsizei width );
 557
 558    void (*CopyColorSubTable)( GLcontext *ctx,
 559                               GLenum target, GLsizei start,
 560                               GLint x, GLint y, GLsizei width );
 561
 562    void (*CopyConvolutionFilter1D)( GLcontext *ctx, GLenum target,
 563                                     GLenum internalFormat,
 564                                     GLint x, GLint y, GLsizei width );
 565
 566    void (*CopyConvolutionFilter2D)( GLcontext *ctx, GLenum target,
 567                                     GLenum internalFormat,
 568                                     GLint x, GLint y,
 569                                     GLsizei width, GLsizei height );
 570    /*@}*/
 571
 572
 573    /**
 574     * \name State-changing functions.
 575     *
 576     * \note drawing functions are above.
 577     *
 578     * These functions are called by their corresponding OpenGL API functions.
 579     * They are \e also called by the gl_PopAttrib() function!!!
 580     * May add more functions like these to the device driver in the future.
 581     */
 582    /*@{*/
 583    /** Specify the alpha test function */
 584    void (*AlphaFunc)(GLcontext *ctx, GLenum func, GLfloat ref);
 585    /** Set the blend color */
 586    void (*BlendColor)(GLcontext *ctx, const GLfloat color[4]);
 587    /** Set the blend equation */
 588    void (*BlendEquation)(GLcontext *ctx, GLenum mode);
 589    /** Specify pixel arithmetic */
 590    void (*BlendFunc)(GLcontext *ctx, GLenum sfactor, GLenum dfactor);
 591    void (*BlendFuncSeparate)(GLcontext *ctx,
 592                              GLenum sfactorRGB, GLenum dfactorRGB,
 593                              GLenum sfactorA, GLenum dfactorA);
 594    /** Specify clear values for the color buffers */
 595    void (*ClearColor)(GLcontext *ctx, const GLfloat color[4]);
 596    /** Specify the clear value for the depth buffer */
 597    void (*ClearDepth)(GLcontext *ctx, GLclampd d);
 598    /** Specify the clear value for the color index buffers */
 599    void (*ClearIndex)(GLcontext *ctx, GLuint index);
 600    /** Specify the clear value for the stencil buffer */
 601    void (*ClearStencil)(GLcontext *ctx, GLint s);
 602    /** Specify a plane against which all geometry is clipped */
 603    void (*ClipPlane)(GLcontext *ctx, GLenum plane, const GLfloat *equation );
 604    /** Enable and disable writing of frame buffer color components */
 605    void (*ColorMask)(GLcontext *ctx, GLboolean rmask, GLboolean gmask,
 606                      GLboolean bmask, GLboolean amask );
 607    /** Cause a material color to track the current color */
 608    void (*ColorMaterial)(GLcontext *ctx, GLenum face, GLenum mode);
 609    /** Specify whether front- or back-facing facets can be culled */
 610    void (*CullFace)(GLcontext *ctx, GLenum mode);
 611    /** Define front- and back-facing polygons */
 612    void (*FrontFace)(GLcontext *ctx, GLenum mode);
 613    /** Specify the value used for depth buffer comparisons */
 614    void (*DepthFunc)(GLcontext *ctx, GLenum func);
 615    /** Enable or disable writing into the depth buffer */
 616    void (*DepthMask)(GLcontext *ctx, GLboolean flag);
 617    /** Specify mapping of depth values from normalized device coordinates to window coordinates */
 618    void (*DepthRange)(GLcontext *ctx, GLclampd nearval, GLclampd farval);
 619    /** Enable or disable server-side gl capabilities */
 620    void (*Enable)(GLcontext *ctx, GLenum cap, GLboolean state);
 621    /** Specify fog parameters */
 622    void (*Fogfv)(GLcontext *ctx, GLenum pname, const GLfloat *params);
 623    /** Specify implementation-specific hints */
 624    void (*Hint)(GLcontext *ctx, GLenum target, GLenum mode);
 625    /** Control the writing of individual bits in the color index buffers */
 626    void (*IndexMask)(GLcontext *ctx, GLuint mask);
 627    /** Set light source parameters */
 628    void (*Lightfv)(GLcontext *ctx, GLenum light,
 629                    GLenum pname, const GLfloat *params );
 630    /** Set the lighting model parameters */
 631    void (*LightModelfv)(GLcontext *ctx, GLenum pname, const GLfloat *params);
 632    /** Specify the line stipple pattern */
 633    void (*LineStipple)(GLcontext *ctx, GLint factor, GLushort pattern );
 634    /** Specify the width of rasterized lines */
 635    void (*LineWidth)(GLcontext *ctx, GLfloat width);
 636    /** Specify a logical pixel operation for color index rendering */
 637    void (*LogicOpcode)(GLcontext *ctx, GLenum opcode);
 638    void (*PointParameterfv)(GLcontext *ctx, GLenum pname,
 639                             const GLfloat *params);
 640    /** Specify the diameter of rasterized points */
 641    void (*PointSize)(GLcontext *ctx, GLfloat size);
 642    /** Select a polygon rasterization mode */
 643    void (*PolygonMode)(GLcontext *ctx, GLenum face, GLenum mode);
 644    /** Set the scale and units used to calculate depth values */
 645    void (*PolygonOffset)(GLcontext *ctx, GLfloat factor, GLfloat units);
 646    /** Set the polygon stippling pattern */
 647    void (*PolygonStipple)(GLcontext *ctx, const GLubyte *mask );
 648    /** Set rasterization mode */
 649    void (*RenderMode)(GLcontext *ctx, GLenum mode );
 650    /** Define the scissor box */
 651    void (*Scissor)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);
 652    /** Select flat or smooth shading */
 653    void (*ShadeModel)(GLcontext *ctx, GLenum mode);
 654    /** Set function and reference value for stencil testing */
 655    void (*StencilFunc)(GLcontext *ctx, GLenum func, GLint ref, GLuint mask);
 656    /** Control the writing of individual bits in the stencil planes */
 657    void (*StencilMask)(GLcontext *ctx, GLuint mask);
 658    /** Set stencil test actions */
 659    void (*StencilOp)(GLcontext *ctx, GLenum fail, GLenum zfail, GLenum zpass);
 660    void (*ActiveStencilFace)(GLcontext *ctx, GLuint face);
 661    /** Control the generation of texture coordinates */
 662    void (*TexGen)(GLcontext *ctx, GLenum coord, GLenum pname,
 663                   const GLfloat *params);
 664    /** Set texture environment parameters */
 665    void (*TexEnv)(GLcontext *ctx, GLenum target, GLenum pname,
 666                   const GLfloat *param);
 667    /** Set texture parameters */
 668    void (*TexParameter)(GLcontext *ctx, GLenum target,
 669                         struct gl_texture_object *texObj,
 670                         GLenum pname, const GLfloat *params);
 671    void (*TextureMatrix)(GLcontext *ctx, GLuint unit, const GLmatrix *mat);
 672    /** Set the viewport */
 673    void (*Viewport)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);
 674    /*@}*/
 675
 676
 677    /**
 678     * \name Vertex array functions
 679     *
 680     * Called by the corresponding OpenGL functions.
 681     */
 682    /*@{*/
 683    void (*VertexPointer)(GLcontext *ctx, GLint size, GLenum type,
 684                          GLsizei stride, const GLvoid *ptr);
 685    void (*NormalPointer)(GLcontext *ctx, GLenum type,
 686                          GLsizei stride, const GLvoid *ptr);
 687    void (*ColorPointer)(GLcontext *ctx, GLint size, GLenum type,
 688                         GLsizei stride, const GLvoid *ptr);
 689    void (*FogCoordPointer)(GLcontext *ctx, GLenum type,
 690                            GLsizei stride, const GLvoid *ptr);
 691    void (*IndexPointer)(GLcontext *ctx, GLenum type,
 692                         GLsizei stride, const GLvoid *ptr);
 693    void (*SecondaryColorPointer)(GLcontext *ctx, GLint size, GLenum type,
 694                                  GLsizei stride, const GLvoid *ptr);
 695    void (*TexCoordPointer)(GLcontext *ctx, GLint size, GLenum type,
 696                            GLsizei stride, const GLvoid *ptr);
 697    void (*EdgeFlagPointer)(GLcontext *ctx, GLsizei stride, const GLvoid *ptr);
 698    void (*VertexAttribPointer)(GLcontext *ctx, GLuint index, GLint size,
 699                                GLenum type, GLsizei stride, const GLvoid *ptr);
 700    /*@}*/
 701
 702
 703    /**
 704     * \name State-query functions
 705     *
 706     * Return GL_TRUE if query was completed, GL_FALSE otherwise.
 707     */
 708    /*@{*/
 709    /** Return the value or values of a selected parameter */
 710    GLboolean (*GetBooleanv)(GLcontext *ctx, GLenum pname, GLboolean *result);
 711    /** Return the value or values of a selected parameter */
 712    GLboolean (*GetDoublev)(GLcontext *ctx, GLenum pname, GLdouble *result);
 713    /** Return the value or values of a selected parameter */
 714    GLboolean (*GetFloatv)(GLcontext *ctx, GLenum pname, GLfloat *result);
 715    /** Return the value or values of a selected parameter */
 716    GLboolean (*GetIntegerv)(GLcontext *ctx, GLenum pname, GLint *result);
 717    /** Return the value or values of a selected parameter */
 718    GLboolean (*GetPointerv)(GLcontext *ctx, GLenum pname, GLvoid **result);
 719    /*@}*/
 720
 721
 722    /**
 723     * \name Vertex buffer object functions
 724     */
 725 #if FEATURE_ARB_vertex_buffer_object
 726    /*@{*/
 727    void (*BindBuffer)( GLcontext *ctx, GLenum target,
 728                        struct gl_buffer_object *obj );
 729
 730    struct gl_buffer_object * (*NewBufferObject)( GLcontext *ctx, GLuint buffer,
 731                                                  GLenum target );
 732
 733    void (*DeleteBuffer)( GLcontext *ctx, struct gl_buffer_object *obj );
 734
 735    void (*BufferData)( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
 736                        const GLvoid *data, GLenum usage,
 737                        struct gl_buffer_object *obj );
 738
 739    void (*BufferSubData)( GLcontext *ctx, GLenum target, GLintptrARB offset,
 740                           GLsizeiptrARB size, const GLvoid *data,
 741                           struct gl_buffer_object *obj );
 742
 743    void (*GetBufferSubData)( GLcontext *ctx, GLenum target,
 744                              GLintptrARB offset, GLsizeiptrARB size,
 745                              GLvoid *data, struct gl_buffer_object *obj );
 746
 747    void * (*MapBuffer)( GLcontext *ctx, GLenum target, GLenum access,
 748                         struct gl_buffer_object *obj );
 749
 750    GLboolean (*UnmapBuffer)( GLcontext *ctx, GLenum target,
 751                              struct gl_buffer_object *obj );
 752    /*@}*/
 753 #endif
 754
 755    /**
 756     * \name Support for multiple T&L engines
 757     */
 758    /*@{*/
 759
 760    /**
 761     * Bitmask of state changes that require the current T&L module to be
 762     * validated, using ValidateTnlModule() below.
 763     */
 764    GLuint NeedValidate;
 765
 766    /**
 767     * Validate the current T&L module.
 768     *
 769     * This is called directly after UpdateState() when a state change that has
 770     * occurred matches the dd_function_table::NeedValidate bitmask above.  This
 771     * ensures all computed values are up to date, thus allowing the driver to
 772     * decide if the current T&L module needs to be swapped out.
 773     *
 774     * This must be non-NULL if a driver installs a custom T&L module and sets
 775     * the dd_function_table::NeedValidate bitmask, but may be NULL otherwise.
 776     */
 777    void (*ValidateTnlModule)( GLcontext *ctx, GLuint new_state );
 778
 779
 780 #define PRIM_OUTSIDE_BEGIN_END   GL_POLYGON+1
 781 #define PRIM_INSIDE_UNKNOWN_PRIM GL_POLYGON+2
 782 #define PRIM_UNKNOWN             GL_POLYGON+3
 783
 784    /**
 785     * Set by the driver-supplied T&L engine.
 786     *
 787     * Set to PRIM_OUTSIDE_BEGIN_END when outside glBegin()/glEnd().
 788     */
 789    GLuint CurrentExecPrimitive;
 790
 791    /**
 792     * Current state of an in-progress compilation.
 793     *
 794     * May take on any of the additional values PRIM_OUTSIDE_BEGIN_END,
 795     * PRIM_INSIDE_UNKNOWN_PRIM or PRIM_UNKNOWN defined above.
 796     */
 797    GLuint CurrentSavePrimitive;
 798
 799
 800 #define FLUSH_STORED_VERTICES 0x1
 801 #define FLUSH_UPDATE_CURRENT  0x2
 802    /**
 803     * Set by the driver-supplied T&L engine whenever vertices are buffered
 804     * between glBegin()/glEnd() objects or __GLcontextRec::Current is not
 805     * updated.
 806     *
 807     * The dd_function_table::FlushVertices call below may be used to resolve
 808     * these conditions.
 809     */
 810    GLuint NeedFlush;
 811
 812    /**
 813     * If inside glBegin()/glEnd(), it should ASSERT(0).  Otherwise, if
 814     * FLUSH_STORED_VERTICES bit in \p flags is set flushes any buffered
 815     * vertices, if FLUSH_UPDATE_CURRENT bit is set updates
 816     * __GLcontextRec::Current and gl_light_attrib::Material
 817     *
 818     * Note that the default T&L engine never clears the
 819     * FLUSH_UPDATE_CURRENT bit, even after performing the update.
 820     */
 821    void (*FlushVertices)( GLcontext *ctx, GLuint flags );
 822
 823    /**
 824     * Notify driver that the special derived value _NeedEyeCoords has
 825     * changed.
 826     */
 827    void (*LightingSpaceChange)( GLcontext *ctx );
 828
 829    /**
 830     * Called by glNewList().
 831     *
 832     * Let the T&L component know what is going on with display lists
 833     * in time to make changes to dispatch tables, etc.
 834     */
 835    void (*NewList)( GLcontext *ctx, GLuint list, GLenum mode );
 836    /**
 837     * Called by glEndList().
 838     *
 839     * \sa dd_function_table::NewList.
 840     */
 841    void (*EndList)( GLcontext *ctx );
 842
 843    /**
 844     * Called by glCallList(s), but not recursively.
 845     *
 846     * Notify the T&L component before and after calling a display list.
 847     * Called by glCallList(s), but not recursively.
 848     */
 849    void (*BeginCallList)( GLcontext *ctx, GLuint list );
 850    /**
 851     * Called by glEndCallList().
 852     *
 853     * \sa dd_function_table::BeginCallList.
 854     */
 855    void (*EndCallList)( GLcontext *ctx );
 856
 857    /**
 858     * Let the T&L component know when the context becomes current.
 859     */
 860    void (*MakeCurrent)( GLcontext *ctx, GLframebuffer *drawBuffer,
 861                         GLframebuffer *readBuffer );
 862
 863    /**
 864     * Called by glLockArraysEXT().
 865     */
 866    void (*LockArraysEXT)( GLcontext *ctx, GLint first, GLsizei count );
 867    /**
 868     * Called by UnlockArraysEXT().
 869     */
 870    void (*UnlockArraysEXT)( GLcontext *ctx );
 871    /*@}*/
 872
 873 };
 874
 875
 876 /**
 877  * Transform/Clip/Lighting interface
 878  *
 879  * Drivers present a reduced set of the functions possible in
 880  * glBegin()/glEnd() objects.  Core mesa provides translation stubs for the
 881  * remaining functions to map down to these entry points.
 882  *
 883  * These are the initial values to be installed into dispatch by
 884  * mesa.  If the T&L driver wants to modify the dispatch table
 885  * while installed, it must do so itself.  It would be possible for
 886  * the vertexformat to install it's own initial values for these
 887  * functions, but this way there is an obvious list of what is
 888  * expected of the driver.
 889  *
 890  * If the driver wants to hook in entry points other than those
 891  * listed, it must restore them to their original values in
 892  * the disable() callback, below.
 893  */
 894 typedef struct {
 895    /**
 896     * \name Vertex
 897     */
 898    /*@{*/
 899    void (GLAPIENTRYP ArrayElement)( GLint ); /* NOTE */
 900    void (GLAPIENTRYP Color3f)( GLfloat, GLfloat, GLfloat );
 901    void (GLAPIENTRYP Color3fv)( const GLfloat * );
 902    void (GLAPIENTRYP Color3ub)( GLubyte, GLubyte, GLubyte );
 903    void (GLAPIENTRYP Color3ubv)( const GLubyte * );
 904    void (GLAPIENTRYP Color4f)( GLfloat, GLfloat, GLfloat, GLfloat );
 905    void (GLAPIENTRYP Color4fv)( const GLfloat * );
 906    void (GLAPIENTRYP Color4ub)( GLubyte, GLubyte, GLubyte, GLubyte );
 907    void (GLAPIENTRYP Color4ubv)( const GLubyte * );
 908    void (GLAPIENTRYP EdgeFlag)( GLboolean );
 909    void (GLAPIENTRYP EdgeFlagv)( const GLboolean * );
 910    void (GLAPIENTRYP EvalCoord1f)( GLfloat );          /* NOTE */
 911    void (GLAPIENTRYP EvalCoord1fv)( const GLfloat * ); /* NOTE */
 912    void (GLAPIENTRYP EvalCoord2f)( GLfloat, GLfloat ); /* NOTE */
 913    void (GLAPIENTRYP EvalCoord2fv)( const GLfloat * ); /* NOTE */
 914    void (GLAPIENTRYP EvalPoint1)( GLint );             /* NOTE */
 915    void (GLAPIENTRYP EvalPoint2)( GLint, GLint );      /* NOTE */
 916    void (GLAPIENTRYP FogCoordfEXT)( GLfloat );
 917    void (GLAPIENTRYP FogCoordfvEXT)( const GLfloat * );
 918    void (GLAPIENTRYP Indexi)( GLint );
 919    void (GLAPIENTRYP Indexiv)( const GLint * );
 920    void (GLAPIENTRYP Materialfv)( GLenum face, GLenum pname, const GLfloat * ); /* NOTE */
 921    void (GLAPIENTRYP MultiTexCoord1fARB)( GLenum, GLfloat );
 922    void (GLAPIENTRYP MultiTexCoord1fvARB)( GLenum, const GLfloat * );
 923    void (GLAPIENTRYP MultiTexCoord2fARB)( GLenum, GLfloat, GLfloat );
 924    void (GLAPIENTRYP MultiTexCoord2fvARB)( GLenum, const GLfloat * );
 925    void (GLAPIENTRYP MultiTexCoord3fARB)( GLenum, GLfloat, GLfloat, GLfloat );
 926    void (GLAPIENTRYP MultiTexCoord3fvARB)( GLenum, const GLfloat * );
 927    void (GLAPIENTRYP MultiTexCoord4fARB)( GLenum, GLfloat, GLfloat, GLfloat, GLfloat );
 928    void (GLAPIENTRYP MultiTexCoord4fvARB)( GLenum, const GLfloat * );
 929    void (GLAPIENTRYP Normal3f)( GLfloat, GLfloat, GLfloat );
 930    void (GLAPIENTRYP Normal3fv)( const GLfloat * );
 931    void (GLAPIENTRYP SecondaryColor3fEXT)( GLfloat, GLfloat, GLfloat );
 932    void (GLAPIENTRYP SecondaryColor3fvEXT)( const GLfloat * );
 933    void (GLAPIENTRYP SecondaryColor3ubEXT)( GLubyte, GLubyte, GLubyte );
 934    void (GLAPIENTRYP SecondaryColor3ubvEXT)( const GLubyte * );
 935    void (GLAPIENTRYP TexCoord1f)( GLfloat );
 936    void (GLAPIENTRYP TexCoord1fv)( const GLfloat * );
 937    void (GLAPIENTRYP TexCoord2f)( GLfloat, GLfloat );
 938    void (GLAPIENTRYP TexCoord2fv)( const GLfloat * );
 939    void (GLAPIENTRYP TexCoord3f)( GLfloat, GLfloat, GLfloat );
 940    void (GLAPIENTRYP TexCoord3fv)( const GLfloat * );
 941    void (GLAPIENTRYP TexCoord4f)( GLfloat, GLfloat, GLfloat, GLfloat );
 942    void (GLAPIENTRYP TexCoord4fv)( const GLfloat * );
 943    void (GLAPIENTRYP Vertex2f)( GLfloat, GLfloat );
 944    void (GLAPIENTRYP Vertex2fv)( const GLfloat * );
 945    void (GLAPIENTRYP Vertex3f)( GLfloat, GLfloat, GLfloat );
 946    void (GLAPIENTRYP Vertex3fv)( const GLfloat * );
 947    void (GLAPIENTRYP Vertex4f)( GLfloat, GLfloat, GLfloat, GLfloat );
 948    void (GLAPIENTRYP Vertex4fv)( const GLfloat * );
 949    void (GLAPIENTRYP CallList)( GLuint );       /* NOTE */
 950    void (GLAPIENTRYP Begin)( GLenum );
 951    void (GLAPIENTRYP End)( void );
 952    void (GLAPIENTRYP VertexAttrib4fNV)( GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w );
 953    void (GLAPIENTRYP VertexAttrib4fvNV)( GLuint index, const GLfloat *v );
 954    /*@}*/
 955
 956    /*
 957     */
 958    void (GLAPIENTRYP Rectf)( GLfloat, GLfloat, GLfloat, GLfloat );
 959
 960    /**
 961     * \name Array
 962     *
 963     * These may or may not belong here.  Heuristic: if an array is
 964     * enabled, the installed vertex format should support that array and
 965     * its current size natively.
 966     */
 967    /*@{*/
 968    void (GLAPIENTRYP DrawArrays)( GLenum mode, GLint start, GLsizei count );
 969    void (GLAPIENTRYP DrawElements)( GLenum mode, GLsizei count, GLenum type,
 970                          const GLvoid *indices );
 971    void (GLAPIENTRYP DrawRangeElements)( GLenum mode, GLuint start,
 972                               GLuint end, GLsizei count,
 973                               GLenum type, const GLvoid *indices );
 974    /*@}*/
 975
 976    /**
 977     * \name Eval
 978     *
 979     * If you don't support eval, fallback to the default vertex format
 980     * on receiving an eval call and use the pipeline mechanism to
 981     * provide partial T&L acceleration.
 982     *
 983     * Mesa will provide a set of helper functions to do eval within
 984     * accelerated vertex formats, eventually...
 985     */
 986    /*@{*/
 987    void (GLAPIENTRYP EvalMesh1)( GLenum mode, GLint i1, GLint i2 );
 988    void (GLAPIENTRYP EvalMesh2)( GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2 );
 989    /*@}*/
 990
 991    /**
 992     * Should core try to send colors to glColor4f or glColor4chan,
 993     * where it has a choice?
 994     */
 995    GLboolean prefer_float_colors;
 996 } GLvertexformat;
 997
 998
 999 #endif /* DD_INCLUDED */