src/mesa/drivers/dri/unichrome/via_context.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file via_context.c
  27  *
  28  * \author John Sheng (presumably of either VIA Technologies or S3 Graphics)
  29  * \author Others at VIA Technologies?
  30  * \author Others at S3 Graphics?
  31  */
  32
  33 #include "glheader.h"
  34 #include "context.h"
  35 #include "matrix.h"
  36 #include "state.h"
  37 #include "simple_list.h"
  38 #include "extensions.h"
  39 #include "framebuffer.h"
  40 #include "renderbuffer.h"
  41
  42 #include "swrast/swrast.h"
  43 #include "swrast_setup/swrast_setup.h"
  44 #include "tnl/tnl.h"
  45 #include "array_cache/acache.h"
  46
  47 #include "tnl/t_pipeline.h"
  48
  49 #include "drivers/common/driverfuncs.h"
  50
  51 #include "via_screen.h"
  52 #include "via_dri.h"
  53
  54 #include "via_state.h"
  55 #include "via_tex.h"
  56 #include "via_span.h"
  57 #include "via_tris.h"
  58 #include "via_ioctl.h"
  59 #include "via_fb.h"
  60
  61 #include <stdio.h>
  62 #include "macros.h"
  63 #include "drirenderbuffer.h"
  64
  65 #define need_GL_ARB_multisample
  66 #define need_GL_ARB_point_parameters
  67 #define need_GL_EXT_fog_coord
  68 #define need_GL_EXT_secondary_color
  69 #include "extension_helper.h"
  70
  71 #define DRIVER_DATE     "20060710"
  72
  73 #include "vblank.h"
  74 #include "utils.h"
  75
  76 GLuint VIA_DEBUG = 0;
  77
  78 /**
  79  * Return various strings for \c glGetString.
  80  *
  81  * \sa glGetString
  82  */
  83 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  84 {
  85    static char buffer[128];
  86    unsigned   offset;
  87
  88
  89    switch (name) {
  90    case GL_VENDOR:
  91       return (GLubyte *)"VIA Technology";
  92
  93    case GL_RENDERER: {
  94       static const char * const chipset_names[] = {
  95          "UniChrome",
  96          "CastleRock (CLE266)",
  97          "UniChrome (KM400)",
  98          "UniChrome (K8M800)",
  99          "UniChrome (PM8x0/CN400)",
 100       };
 101       struct via_context *vmesa = VIA_CONTEXT(ctx);
 102       unsigned id = vmesa->viaScreen->deviceID;
 103
 104       offset = driGetRendererString( buffer,
 105                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 106                                      DRIVER_DATE, 0 );
 107       return (GLubyte *)buffer;
 108    }
 109
 110    default:
 111       return NULL;
 112    }
 113 }
 114
 115
 116 /**
 117  * Calculate a width that satisfies the hardware's alignment requirements.
 118  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 119  * 16 pixels.
 120  *
 121  * \param width  Minimum buffer width, in pixels.
 122  *
 123  * \returns A pixel width that meets the alignment requirements.
 124  */
 125 static __inline__ unsigned
 126 buffer_align( unsigned width )
 127 {
 128     return (width + 0x0f) & ~0x0f;
 129 }
 130
 131
 132 static void
 133 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 134 {
 135    /* Don't free() since we're contained in via_context struct. */
 136 }
 137
 138 static GLboolean
 139 viaRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
 140                        GLenum internalFormat, GLuint width, GLuint height)
 141 {
 142    rb->Width = width;
 143    rb->Height = height;
 144    rb->InternalFormat = internalFormat;
 145    return GL_TRUE;
 146 }
 147
 148
 149 static void
 150 viaInitRenderbuffer(struct via_renderbuffer *vrb, GLenum format,
 151                     __DRIdrawablePrivate *dPriv)
 152 {
 153    const GLuint name = 0;
 154    struct gl_renderbuffer *rb = & vrb->Base;
 155
 156    vrb->dPriv = dPriv;
 157    _mesa_init_renderbuffer(rb, name);
 158
 159    /* Make sure we're using a null-valued GetPointer routine */
 160    assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
 161
 162    rb->InternalFormat = format;
 163
 164    if (format == GL_RGBA) {
 165       /* Color */
 166       rb->_BaseFormat = GL_RGBA;
 167       rb->DataType = GL_UNSIGNED_BYTE;
 168    }
 169    else if (format == GL_DEPTH_COMPONENT16) {
 170       /* Depth */
 171       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 172       /* we always Get/Put 32-bit Z values */
 173       rb->DataType = GL_UNSIGNED_INT;
 174    }
 175    else if (format == GL_DEPTH_COMPONENT24) {
 176       /* Depth */
 177       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 178       /* we always Get/Put 32-bit Z values */
 179       rb->DataType = GL_UNSIGNED_INT;
 180    }
 181    else {
 182       /* Stencil */
 183       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 184       rb->_BaseFormat = GL_STENCIL_INDEX;
 185       rb->DataType = GL_UNSIGNED_BYTE;
 186    }
 187
 188    rb->Delete = viaDeleteRenderbuffer;
 189    rb->AllocStorage = viaRenderbufferStorage;
 190 }
 191
 192
 193 /**
 194  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 195  * and stencil) associated with the specified context.
 196  *
 197  * \warning
 198  * This function also calls \c AllocateBuffer to actually allocate the
 199  * buffers.
 200  *
 201  * \sa AllocateBuffer
 202  */
 203 static GLboolean
 204 calculate_buffer_parameters(struct via_context *vmesa,
 205                             struct gl_framebuffer *fb,
 206                             __DRIdrawablePrivate *dPriv)
 207 {
 208    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 209    const unsigned extra = 32;
 210    unsigned w;
 211    unsigned h;
 212
 213    /* Normally, the renderbuffer would be added to the framebuffer just once
 214     * when the framebuffer was created.  The VIA driver is a bit funny
 215     * though in that the front/back/depth renderbuffers are in the per-context
 216     * state!
 217     * That should be fixed someday.
 218     */
 219
 220    if (!vmesa->front.Base.InternalFormat) {
 221       /* do one-time init for the renderbuffers */
 222       viaInitRenderbuffer(&vmesa->front, GL_RGBA, dPriv);
 223       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 224       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 225
 226       if (fb->Visual.doubleBufferMode) {
 227          viaInitRenderbuffer(&vmesa->back, GL_RGBA, dPriv);
 228          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 229          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 230       }
 231
 232       if (vmesa->glCtx->Visual.depthBits > 0) {
 233          viaInitRenderbuffer(&vmesa->depth,
 234                              (vmesa->glCtx->Visual.depthBits == 16
 235                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24),
 236                              dPriv);
 237          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 238          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 239       }
 240
 241       if (vmesa->glCtx->Visual.stencilBits > 0) {
 242          viaInitRenderbuffer(&vmesa->stencil, GL_STENCIL_INDEX8_EXT,
 243                              dPriv);
 244          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 245          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 246       }
 247    }
 248
 249    assert(vmesa->front.Base.InternalFormat);
 250    assert(vmesa->front.Base.AllocStorage);
 251    if (fb->Visual.doubleBufferMode) {
 252       assert(vmesa->back.Base.AllocStorage);
 253    }
 254    if (fb->Visual.depthBits) {
 255       assert(vmesa->depth.Base.AllocStorage);
 256    }
 257
 258
 259    /* Allocate front-buffer */
 260    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 261       w = vmesa->driDrawable->w;
 262       h = vmesa->driDrawable->h;
 263
 264       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 265       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 266       vmesa->front.size = vmesa->front.pitch * h;
 267
 268       if (vmesa->front.map)
 269          via_free_draw_buffer(vmesa, &vmesa->front);
 270       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 271          return GL_FALSE;
 272
 273    } else {
 274       w = vmesa->viaScreen->width;
 275       h = vmesa->viaScreen->height;
 276
 277       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 278       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 279       vmesa->front.size = vmesa->front.pitch * h;
 280       if (getenv("ALTERNATE_SCREEN"))
 281         vmesa->front.offset = vmesa->front.size;
 282       else
 283         vmesa->front.offset = 0;
 284       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 285    }
 286
 287
 288    /* Allocate back-buffer */
 289    if (vmesa->hasBack) {
 290       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 291       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 292       vmesa->back.pitch += extra;
 293       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 294       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 295       if (vmesa->back.map)
 296          via_free_draw_buffer(vmesa, &vmesa->back);
 297       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 298          return GL_FALSE;
 299    }
 300    else {
 301       if (vmesa->back.map)
 302          via_free_draw_buffer(vmesa, &vmesa->back);
 303       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 304    }
 305
 306
 307    /* Allocate depth-buffer */
 308    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 309       vmesa->depth.bpp = vmesa->depthBits;
 310       if (vmesa->depth.bpp == 24)
 311          vmesa->depth.bpp = 32;
 312
 313       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 314                             (vmesa->depth.bpp/8)) + extra;
 315       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 316
 317       if (vmesa->depth.map)
 318          via_free_draw_buffer(vmesa, &vmesa->depth);
 319       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 320          return GL_FALSE;
 321       }
 322    }
 323    else {
 324       if (vmesa->depth.map)
 325          via_free_draw_buffer(vmesa, &vmesa->depth);
 326       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 327    }
 328
 329    /* stencil buffer is same as depth buffer */
 330    vmesa->stencil.handle = vmesa->depth.handle;
 331    vmesa->stencil.size = vmesa->depth.size;
 332    vmesa->stencil.offset = vmesa->depth.offset;
 333    vmesa->stencil.index = vmesa->depth.index;
 334    vmesa->stencil.pitch = vmesa->depth.pitch;
 335    vmesa->stencil.bpp = vmesa->depth.bpp;
 336    vmesa->stencil.map = vmesa->depth.map;
 337    vmesa->stencil.orig = vmesa->depth.orig;
 338    vmesa->stencil.origMap = vmesa->depth.origMap;
 339
 340    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 341        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 342       vmesa->doPageFlip = vmesa->allowPageFlip;
 343       if (vmesa->hasBack) {
 344          assert(vmesa->back.pitch == vmesa->front.pitch);
 345       }
 346    }
 347    else
 348       vmesa->doPageFlip = GL_FALSE;
 349
 350    return GL_TRUE;
 351 }
 352
 353
 354 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 355                           GLuint width, GLuint height)
 356 {
 357     struct via_context *vmesa = VIA_CONTEXT(ctx);
 358
 359     calculate_buffer_parameters(vmesa, drawbuffer, vmesa->driDrawable);
 360
 361     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 362 }
 363
 364 /* Extension strings exported by the Unichrome driver.
 365  */
 366 const struct dri_extension card_extensions[] =
 367 {
 368     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 369     { "GL_ARB_multitexture",               NULL },
 370     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 371     { "GL_ARB_texture_env_add",            NULL },
 372     { "GL_ARB_texture_env_combine",        NULL },
 373 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 374     { "GL_ARB_texture_mirrored_repeat",    NULL },
 375     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 376     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 377     { "GL_EXT_stencil_wrap",               NULL },
 378     { "GL_EXT_texture_env_combine",        NULL },
 379 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 380     { "GL_EXT_texture_lod_bias",           NULL },
 381     { "GL_NV_blend_square",                NULL },
 382     { NULL,                                NULL }
 383 };
 384
 385 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 386 extern const struct tnl_pipeline_stage _via_render_stage;
 387
 388 static const struct tnl_pipeline_stage *via_pipeline[] = {
 389     &_tnl_vertex_transform_stage,
 390     &_tnl_normal_transform_stage,
 391     &_tnl_lighting_stage,
 392     &_tnl_fog_coordinate_stage,
 393     &_tnl_texgen_stage,
 394     &_tnl_texture_transform_stage,
 395     /* REMOVE: point attenuation stage */
 396 #if 1
 397     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 398 #endif
 399     &_tnl_render_stage,
 400     0,
 401 };
 402
 403
 404 static const struct dri_debug_control debug_control[] =
 405 {
 406     { "fall",  DEBUG_FALLBACKS },
 407     { "tex",   DEBUG_TEXTURE },
 408     { "ioctl", DEBUG_IOCTL },
 409     { "prim",  DEBUG_PRIMS },
 410     { "vert",  DEBUG_VERTS },
 411     { "state", DEBUG_STATE },
 412     { "verb",  DEBUG_VERBOSE },
 413     { "dri",   DEBUG_DRI },
 414     { "dma",   DEBUG_DMA },
 415     { "san",   DEBUG_SANITY },
 416     { "sync",  DEBUG_SYNC },
 417     { "sleep", DEBUG_SLEEP },
 418     { "pix",   DEBUG_PIXEL },
 419     { "2d",    DEBUG_2D },
 420     { NULL,    0 }
 421 };
 422
 423
 424 static GLboolean
 425 AllocateDmaBuffer(struct via_context *vmesa)
 426 {
 427     if (vmesa->dma)
 428         via_free_dma_buffer(vmesa);
 429
 430     if (!via_alloc_dma_buffer(vmesa))
 431         return GL_FALSE;
 432
 433     vmesa->dmaLow = 0;
 434     vmesa->dmaCliprectAddr = ~0;
 435     return GL_TRUE;
 436 }
 437
 438 static void
 439 FreeBuffer(struct via_context *vmesa)
 440 {
 441     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 442         via_free_draw_buffer(vmesa, &vmesa->front);
 443
 444     if (vmesa->back.map)
 445         via_free_draw_buffer(vmesa, &vmesa->back);
 446
 447     if (vmesa->depth.map)
 448         via_free_draw_buffer(vmesa, &vmesa->depth);
 449
 450     if (vmesa->breadcrumb.map)
 451         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 452
 453     if (vmesa->dma)
 454         via_free_dma_buffer(vmesa);
 455 }
 456
 457
 458 GLboolean
 459 viaCreateContext(const __GLcontextModes *visual,
 460                  __DRIcontextPrivate *driContextPriv,
 461                  void *sharedContextPrivate)
 462 {
 463     GLcontext *ctx, *shareCtx;
 464     struct via_context *vmesa;
 465     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 466     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 467     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 468         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 469     struct dd_function_table functions;
 470
 471     /* Allocate via context */
 472     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 473     if (!vmesa) {
 474         return GL_FALSE;
 475     }
 476
 477     /* Parse configuration files.
 478      */
 479     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 480                          sPriv->myNum, "unichrome");
 481
 482     /* pick back buffer */
 483     vmesa->hasBack = visual->doubleBufferMode;
 484
 485     switch(visual->depthBits) {
 486     case 0:
 487        vmesa->hasDepth = GL_FALSE;
 488        vmesa->depthBits = 0;
 489        vmesa->depth_max = 1.0;
 490        break;
 491     case 16:
 492        vmesa->hasDepth = GL_TRUE;
 493        vmesa->depthBits = visual->depthBits;
 494        vmesa->have_hw_stencil = GL_FALSE;
 495        vmesa->depth_max = (GLfloat)0xffff;
 496        vmesa->depth_clear_mask = 0xf << 28;
 497        vmesa->ClearDepth = 0xffff;
 498        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 499        break;
 500     case 24:
 501        vmesa->hasDepth = GL_TRUE;
 502        vmesa->depthBits = visual->depthBits;
 503        vmesa->depth_max = (GLfloat) 0xffffff;
 504        vmesa->depth_clear_mask = 0xe << 28;
 505        vmesa->ClearDepth = 0xffffff00;
 506
 507        assert(visual->haveStencilBuffer);
 508        assert(visual->stencilBits == 8);
 509
 510        vmesa->have_hw_stencil = GL_TRUE;
 511        vmesa->stencilBits = visual->stencilBits;
 512        vmesa->stencil_clear_mask = 0x1 << 28;
 513        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 514        break;
 515     case 32:
 516        vmesa->hasDepth = GL_TRUE;
 517        vmesa->depthBits = visual->depthBits;
 518        assert(!visual->haveStencilBuffer);
 519        vmesa->have_hw_stencil = GL_FALSE;
 520        vmesa->depth_max = (GLfloat)0xffffffff;
 521        vmesa->depth_clear_mask = 0xf << 28;
 522        vmesa->ClearDepth = 0xffffffff;
 523        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 524        break;
 525     default:
 526        assert(0);
 527        break;
 528     }
 529
 530     make_empty_list(&vmesa->freed_tex_buffers);
 531     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 532     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 533     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 534
 535     _mesa_init_driver_functions(&functions);
 536     viaInitTextureFuncs(&functions);
 537
 538     /* Allocate the Mesa context */
 539     if (sharedContextPrivate)
 540         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 541     else
 542         shareCtx = NULL;
 543
 544     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 545                                         (void*) vmesa);
 546
 547     vmesa->shareCtx = shareCtx;
 548
 549     if (!vmesa->glCtx) {
 550         FREE(vmesa);
 551         return GL_FALSE;
 552     }
 553     driContextPriv->driverPrivate = vmesa;
 554
 555     ctx = vmesa->glCtx;
 556
 557     if (driQueryOptionb(&vmesa->optionCache, "excess_mipmap"))
 558         ctx->Const.MaxTextureLevels = 11;
 559     else
 560         ctx->Const.MaxTextureLevels = 10;
 561
 562     ctx->Const.MaxTextureUnits = 2;
 563     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 564     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 565
 566     ctx->Const.MinLineWidth = 1.0;
 567     ctx->Const.MinLineWidthAA = 1.0;
 568     ctx->Const.MaxLineWidth = 1.0;
 569     ctx->Const.MaxLineWidthAA = 1.0;
 570     ctx->Const.LineWidthGranularity = 1.0;
 571
 572     ctx->Const.MinPointSize = 1.0;
 573     ctx->Const.MinPointSizeAA = 1.0;
 574     ctx->Const.MaxPointSize = 1.0;
 575     ctx->Const.MaxPointSizeAA = 1.0;
 576     ctx->Const.PointSizeGranularity = 1.0;
 577
 578     ctx->Driver.GetString = viaGetString;
 579
 580     ctx->DriverCtx = (void *)vmesa;
 581     vmesa->glCtx = ctx;
 582
 583     /* Initialize the software rasterizer and helper modules.
 584      */
 585     _swrast_CreateContext(ctx);
 586     _ac_CreateContext(ctx);
 587     _tnl_CreateContext(ctx);
 588     _swsetup_CreateContext(ctx);
 589
 590     /* Install the customized pipeline:
 591      */
 592     _tnl_destroy_pipeline(ctx);
 593     _tnl_install_pipeline(ctx, via_pipeline);
 594
 595     /* Configure swrast and T&L to match hardware characteristics:
 596      */
 597     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 598     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 599     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 600     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 601
 602 /*     vmesa->display = dpy; */
 603     vmesa->display = sPriv->display;
 604
 605     vmesa->hHWContext = driContextPriv->hHWContext;
 606     vmesa->driFd = sPriv->fd;
 607     vmesa->driHwLock = &sPriv->pSAREA->lock;
 608
 609     vmesa->viaScreen = viaScreen;
 610     vmesa->driScreen = sPriv;
 611     vmesa->sarea = saPriv;
 612
 613     vmesa->renderIndex = ~0;
 614     vmesa->setupIndex = ~0;
 615     vmesa->hwPrimitive = GL_POLYGON+1;
 616
 617     /* KW: Hardwire this.  Was previously set bogusly in
 618      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 619      */
 620     vmesa->drawType = GLX_WINDOW_BIT;
 621
 622
 623     _math_matrix_ctr(&vmesa->ViewportMatrix);
 624
 625     /* Do this early, before VIA_FLUSH_DMA can be called:
 626      */
 627     if (!AllocateDmaBuffer(vmesa)) {
 628         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 629         FreeBuffer(vmesa);
 630         FREE(vmesa);
 631         return GL_FALSE;
 632     }
 633
 634     /* Allocate a small piece of fb memory for synchronization:
 635      */
 636     vmesa->breadcrumb.bpp = 32;
 637     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 638     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 639
 640     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 641         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 642         FreeBuffer(vmesa);
 643         FREE(vmesa);
 644         return GL_FALSE;
 645     }
 646
 647     driInitExtensions( ctx, card_extensions, GL_TRUE );
 648     viaInitStateFuncs(ctx);
 649     viaInitTriFuncs(ctx);
 650     viaInitSpanFuncs(ctx);
 651     viaInitIoctlFuncs(ctx);
 652     viaInitState(ctx);
 653
 654     if (getenv("VIA_DEBUG"))
 655        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 656                                         debug_control );
 657
 658     if (getenv("VIA_NO_RAST") ||
 659         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 660        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 661
 662     vmesa->vblank_flags =
 663        vmesa->viaScreen->irqEnabled ?
 664         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 665
 666     if (getenv("VIA_PAGEFLIP"))
 667        vmesa->allowPageFlip = 1;
 668
 669     (*dri_interface->getUST)( &vmesa->swap_ust );
 670
 671
 672     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 673     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 674     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 675     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 676     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 677     vmesa->agpBase = viaScreen->agpBase;
 678
 679
 680     return GL_TRUE;
 681 }
 682
 683 void
 684 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 685 {
 686     GET_CURRENT_CONTEXT(ctx);
 687     struct via_context *vmesa =
 688        (struct via_context *)driContextPriv->driverPrivate;
 689     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 690     assert(vmesa); /* should never be null */
 691
 692     /* check if we're deleting the currently bound context */
 693     if (vmesa == current) {
 694       VIA_FLUSH_DMA(vmesa);
 695       _mesa_make_current(NULL, NULL, NULL);
 696     }
 697
 698     if (vmesa) {
 699         viaWaitIdle(vmesa, GL_FALSE);
 700         if (vmesa->doPageFlip) {
 701            LOCK_HARDWARE(vmesa);
 702            if (vmesa->pfCurrentOffset != 0) {
 703               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 704               viaResetPageFlippingLocked(vmesa);
 705            }
 706            UNLOCK_HARDWARE(vmesa);
 707         }
 708
 709         _swsetup_DestroyContext(vmesa->glCtx);
 710         _tnl_DestroyContext(vmesa->glCtx);
 711         _ac_DestroyContext(vmesa->glCtx);
 712         _swrast_DestroyContext(vmesa->glCtx);
 713         /* free the Mesa context */
 714         _mesa_destroy_context(vmesa->glCtx);
 715         /* release our data */
 716         FreeBuffer(vmesa);
 717
 718         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 719         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 720         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 721         assert (is_empty_list(&vmesa->freed_tex_buffers));
 722
 723         driDestroyOptionCache(&vmesa->optionCache);
 724
 725         FREE(vmesa);
 726     }
 727 }
 728
 729
 730 void viaXMesaWindowMoved(struct via_context *vmesa)
 731 {
 732    __DRIdrawablePrivate *const drawable = vmesa->driDrawable;
 733    __DRIdrawablePrivate *const readable = vmesa->driReadable;
 734    struct via_renderbuffer *const draw_buffer =
 735      (struct via_renderbuffer *) drawable->driverPrivate;
 736    struct via_renderbuffer *const read_buffer =
 737      (struct via_renderbuffer *) readable->driverPrivate;
 738    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 739
 740    if (!drawable)
 741       return;
 742
 743    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0]) {
 744    case BUFFER_BIT_BACK_LEFT:
 745       if (drawable->numBackClipRects == 0) {
 746          vmesa->numClipRects = drawable->numClipRects;
 747          vmesa->pClipRects = drawable->pClipRects;
 748       }
 749       else {
 750          vmesa->numClipRects = drawable->numBackClipRects;
 751          vmesa->pClipRects = drawable->pBackClipRects;
 752       }
 753       break;
 754    case BUFFER_BIT_FRONT_LEFT:
 755       vmesa->numClipRects = drawable->numClipRects;
 756       vmesa->pClipRects = drawable->pClipRects;
 757       break;
 758    default:
 759       vmesa->numClipRects = 0;
 760       break;
 761    }
 762
 763    if ((draw_buffer->drawW != drawable->w)
 764        || (draw_buffer->drawH != drawable->h)) {
 765       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 766                                   drawable);
 767    }
 768
 769    draw_buffer->drawXoff = (GLuint)(((drawable->x * bytePerPixel) & 0x1f) /
 770                               bytePerPixel);
 771    draw_buffer->drawX = drawable->x - draw_buffer->drawXoff;
 772    draw_buffer->drawY = drawable->y;
 773    draw_buffer->drawW = drawable->w;
 774    draw_buffer->drawH = drawable->h;
 775
 776    if (drawable != readable) {
 777       if ((read_buffer->drawW != readable->w)
 778           || (read_buffer->drawH != readable->h)) {
 779          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 780                                      readable);
 781       }
 782
 783       read_buffer->drawXoff = (GLuint)(((readable->x * bytePerPixel) & 0x1f) /
 784                                        bytePerPixel);
 785       read_buffer->drawX = readable->x - read_buffer->drawXoff;
 786       read_buffer->drawY = readable->y;
 787       read_buffer->drawW = readable->w;
 788       read_buffer->drawH = readable->h;
 789    }
 790
 791    vmesa->front.orig = (vmesa->front.offset +
 792                         draw_buffer->drawY * vmesa->front.pitch +
 793                         draw_buffer->drawX * bytePerPixel);
 794
 795    vmesa->front.origMap = (vmesa->front.map +
 796                            draw_buffer->drawY * vmesa->front.pitch +
 797                            draw_buffer->drawX * bytePerPixel);
 798
 799    vmesa->back.orig = vmesa->back.offset;
 800    vmesa->depth.orig = vmesa->depth.offset;
 801    vmesa->back.origMap = vmesa->back.map;
 802    vmesa->depth.origMap = vmesa->depth.map;
 803
 804    viaCalcViewport(vmesa->glCtx);
 805 }
 806
 807 GLboolean
 808 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 809 {
 810     return GL_TRUE;
 811 }
 812
 813 GLboolean
 814 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 815                __DRIdrawablePrivate *driDrawPriv,
 816                __DRIdrawablePrivate *driReadPriv)
 817 {
 818     if (VIA_DEBUG & DEBUG_DRI) {
 819         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 820         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 821         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 822     }
 823
 824     if (driContextPriv) {
 825         struct via_context *vmesa =
 826            (struct via_context *)driContextPriv->driverPrivate;
 827         GLcontext *ctx = vmesa->glCtx;
 828         struct gl_framebuffer *drawBuffer, *readBuffer;
 829
 830         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 831         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 832
 833         if (vmesa->driDrawable != driDrawPriv) {
 834            driDrawableInitVBlank(driDrawPriv, vmesa->vblank_flags,
 835                                  &vmesa->vbl_seq);
 836         }
 837
 838        if ((vmesa->driDrawable != driDrawPriv)
 839            || (vmesa->driReadable != driReadPriv)) {
 840           vmesa->driDrawable = driDrawPriv;
 841           vmesa->driReadable = driReadPriv;
 842
 843           if ((drawBuffer->Width != driDrawPriv->w)
 844               || (drawBuffer->Height != driDrawPriv->h)) {
 845              _mesa_resize_framebuffer(ctx, drawBuffer,
 846                                       driDrawPriv->w, driDrawPriv->h);
 847              drawBuffer->Initialized = GL_TRUE;
 848           }
 849
 850           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 851              return GL_FALSE;
 852           }
 853
 854           if (driDrawPriv != driReadPriv) {
 855              if ((readBuffer->Width != driReadPriv->w)
 856                  || (readBuffer->Height != driReadPriv->h)) {
 857                 _mesa_resize_framebuffer(ctx, readBuffer,
 858                                          driReadPriv->w, driReadPriv->h);
 859                 readBuffer->Initialized = GL_TRUE;
 860              }
 861
 862              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 863                 return GL_FALSE;
 864              }
 865           }
 866        }
 867
 868         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 869
 870         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 871
 872         viaXMesaWindowMoved(vmesa);
 873         ctx->Driver.Scissor(vmesa->glCtx,
 874                             vmesa->glCtx->Scissor.X,
 875                             vmesa->glCtx->Scissor.Y,
 876                             vmesa->glCtx->Scissor.Width,
 877                             vmesa->glCtx->Scissor.Height);
 878     }
 879     else {
 880         _mesa_make_current(NULL, NULL, NULL);
 881     }
 882
 883     return GL_TRUE;
 884 }
 885
 886 void viaGetLock(struct via_context *vmesa, GLuint flags)
 887 {
 888     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 889     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 890
 891     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 892
 893     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 894     if (dPriv != vmesa->driReadable) {
 895         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 896     }
 897
 898     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 899        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 900        vmesa->newEmitState = ~0;
 901     }
 902
 903     if (vmesa->lastStamp != dPriv->lastStamp) {
 904        viaXMesaWindowMoved(vmesa);
 905        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 906        vmesa->newEmitState = ~0;
 907        vmesa->lastStamp = dPriv->lastStamp;
 908     }
 909
 910     if (vmesa->doPageFlip &&
 911         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 912        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 913        viaResetPageFlippingLocked(vmesa);
 914     }
 915 }
 916
 917
 918 void
 919 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 920 {
 921     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 922
 923     if (dPriv &&
 924         dPriv->driContextPriv &&
 925         dPriv->driContextPriv->driverPrivate) {
 926         struct via_context *vmesa =
 927            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 928         GLcontext *ctx = vmesa->glCtx;
 929
 930         _mesa_notifySwapBuffers(ctx);
 931
 932         if (ctx->Visual.doubleBufferMode) {
 933             if (vmesa->doPageFlip) {
 934                 viaPageFlip(dPriv);
 935             }
 936             else {
 937                 viaCopyBuffer(dPriv);
 938             }
 939         }
 940         else
 941             VIA_FLUSH_DMA(vmesa);
 942     }
 943     else {
 944         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 945     }
 946 }