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 "main/glheader.h"
  34 #include "main/context.h"
  35 #include "main/formats.h"
  36 #include "main/simple_list.h"
  37 #include "main/framebuffer.h"
  38 #include "main/renderbuffer.h"
  39
  40 #include "swrast/swrast.h"
  41 #include "swrast_setup/swrast_setup.h"
  42 #include "tnl/tnl.h"
  43 #include "vbo/vbo.h"
  44
  45 #include "tnl/t_pipeline.h"
  46
  47 #include "drivers/common/driverfuncs.h"
  48
  49 #include "via_screen.h"
  50 #include "via_dri.h"
  51
  52 #include "via_state.h"
  53 #include "via_tex.h"
  54 #include "via_span.h"
  55 #include "via_tris.h"
  56 #include "via_ioctl.h"
  57 #include "via_fb.h"
  58
  59 #include <stdio.h>
  60 #include "main/macros.h"
  61 #include "drirenderbuffer.h"
  62
  63 #define need_GL_ARB_point_parameters
  64 #define need_GL_EXT_fog_coord
  65 #define need_GL_EXT_secondary_color
  66 #include "main/remap_helper.h"
  67
  68 #define DRIVER_DATE     "20060710"
  69
  70 #include "vblank.h"
  71 #include "utils.h"
  72
  73 GLuint VIA_DEBUG = 0;
  74
  75 /**
  76  * Return various strings for \c glGetString.
  77  *
  78  * \sa glGetString
  79  */
  80 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  81 {
  82    static char buffer[128];
  83    unsigned   offset;
  84
  85
  86    switch (name) {
  87    case GL_VENDOR:
  88       return (GLubyte *)"VIA Technology";
  89
  90    case GL_RENDERER: {
  91       static const char * const chipset_names[] = {
  92          "UniChrome",
  93          "CastleRock (CLE266)",
  94          "UniChrome (KM400)",
  95          "UniChrome (K8M800)",
  96          "UniChrome (PM8x0/CN400)",
  97       };
  98       struct via_context *vmesa = VIA_CONTEXT(ctx);
  99       unsigned id = vmesa->viaScreen->deviceID;
 100
 101       offset = driGetRendererString( buffer,
 102                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 103                                      DRIVER_DATE, 0 );
 104       return (GLubyte *)buffer;
 105    }
 106
 107    default:
 108       return NULL;
 109    }
 110 }
 111
 112
 113 /**
 114  * Calculate a width that satisfies the hardware's alignment requirements.
 115  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 116  * 16 pixels.
 117  *
 118  * \param width  Minimum buffer width, in pixels.
 119  *
 120  * \returns A pixel width that meets the alignment requirements.
 121  */
 122 static INLINE unsigned
 123 buffer_align( unsigned width )
 124 {
 125     return (width + 0x0f) & ~0x0f;
 126 }
 127
 128
 129 static void
 130 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 131 {
 132    /* Don't free() since we're contained in via_context struct. */
 133 }
 134
 135 static GLboolean
 136 viaRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
 137                        GLenum internalFormat, GLuint width, GLuint height)
 138 {
 139    rb->Width = width;
 140    rb->Height = height;
 141    rb->InternalFormat = internalFormat;
 142    return GL_TRUE;
 143 }
 144
 145
 146 static void
 147 viaInitRenderbuffer(struct via_renderbuffer *vrb, GLenum format,
 148                     __DRIdrawable *dPriv)
 149 {
 150    const GLuint name = 0;
 151    struct gl_renderbuffer *rb = & vrb->Base;
 152
 153    vrb->dPriv = dPriv;
 154    _mesa_init_renderbuffer(rb, name);
 155
 156    /* Make sure we're using a null-valued GetPointer routine */
 157    assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
 158
 159    rb->InternalFormat = format;
 160
 161    if (format == GL_RGBA) {
 162       /* Color */
 163       rb->_BaseFormat = GL_RGBA;
 164       rb->Format = MESA_FORMAT_ARGB8888;
 165       rb->DataType = GL_UNSIGNED_BYTE;
 166    }
 167    else if (format == GL_DEPTH_COMPONENT16) {
 168       /* Depth */
 169       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 170       /* we always Get/Put 32-bit Z values */
 171       rb->Format = MESA_FORMAT_Z16;
 172       rb->DataType = GL_UNSIGNED_INT;
 173    }
 174    else if (format == GL_DEPTH_COMPONENT24) {
 175       /* Depth */
 176       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 177       /* we always Get/Put 32-bit Z values */
 178       rb->Format = MESA_FORMAT_Z32;
 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->Format = MESA_FORMAT_S8;
 186       rb->DataType = GL_UNSIGNED_BYTE;
 187    }
 188
 189    rb->Delete = viaDeleteRenderbuffer;
 190    rb->AllocStorage = viaRenderbufferStorage;
 191 }
 192
 193
 194 /**
 195  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 196  * and stencil) associated with the specified context.
 197  *
 198  * \warning
 199  * This function also calls \c AllocateBuffer to actually allocate the
 200  * buffers.
 201  *
 202  * \sa AllocateBuffer
 203  */
 204 static GLboolean
 205 calculate_buffer_parameters(struct via_context *vmesa,
 206                             struct gl_framebuffer *fb,
 207                             __DRIdrawable *dPriv)
 208 {
 209    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 210    const unsigned extra = 32;
 211    unsigned w;
 212    unsigned h;
 213
 214    /* Normally, the renderbuffer would be added to the framebuffer just once
 215     * when the framebuffer was created.  The VIA driver is a bit funny
 216     * though in that the front/back/depth renderbuffers are in the per-context
 217     * state!
 218     * That should be fixed someday.
 219     */
 220
 221    if (!vmesa->front.Base.InternalFormat) {
 222       /* do one-time init for the renderbuffers */
 223       viaInitRenderbuffer(&vmesa->front, GL_RGBA, dPriv);
 224       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 225       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 226
 227       if (fb->Visual.doubleBufferMode) {
 228          viaInitRenderbuffer(&vmesa->back, GL_RGBA, dPriv);
 229          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 230          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 231       }
 232
 233       if (vmesa->glCtx->Visual.depthBits > 0) {
 234          viaInitRenderbuffer(&vmesa->depth,
 235                              (vmesa->glCtx->Visual.depthBits == 16
 236                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24),
 237                              dPriv);
 238          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 239          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 240       }
 241
 242       if (vmesa->glCtx->Visual.stencilBits > 0) {
 243          viaInitRenderbuffer(&vmesa->stencil, GL_STENCIL_INDEX8_EXT,
 244                              dPriv);
 245          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 246          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 247       }
 248    }
 249
 250    assert(vmesa->front.Base.InternalFormat);
 251    assert(vmesa->front.Base.AllocStorage);
 252    if (fb->Visual.doubleBufferMode) {
 253       assert(vmesa->back.Base.AllocStorage);
 254    }
 255    if (fb->Visual.depthBits) {
 256       assert(vmesa->depth.Base.AllocStorage);
 257    }
 258
 259
 260    /* Allocate front-buffer */
 261    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 262       w = vmesa->driDrawable->w;
 263       h = vmesa->driDrawable->h;
 264
 265       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 266       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 267       vmesa->front.size = vmesa->front.pitch * h;
 268
 269       if (vmesa->front.map)
 270          via_free_draw_buffer(vmesa, &vmesa->front);
 271       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 272          return GL_FALSE;
 273
 274    } else {
 275       w = vmesa->viaScreen->width;
 276       h = vmesa->viaScreen->height;
 277
 278       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 279       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 280       vmesa->front.size = vmesa->front.pitch * h;
 281       if (getenv("ALTERNATE_SCREEN"))
 282         vmesa->front.offset = vmesa->front.size;
 283       else
 284         vmesa->front.offset = 0;
 285       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 286    }
 287
 288
 289    /* Allocate back-buffer */
 290    if (vmesa->hasBack) {
 291       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 292       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 293       vmesa->back.pitch += extra;
 294       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 295       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 296       if (vmesa->back.map)
 297          via_free_draw_buffer(vmesa, &vmesa->back);
 298       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 299          return GL_FALSE;
 300    }
 301    else {
 302       if (vmesa->back.map)
 303          via_free_draw_buffer(vmesa, &vmesa->back);
 304       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 305    }
 306
 307
 308    /* Allocate depth-buffer */
 309    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 310       vmesa->depth.bpp = vmesa->depthBits;
 311       if (vmesa->depth.bpp == 24)
 312          vmesa->depth.bpp = 32;
 313
 314       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 315                             (vmesa->depth.bpp/8)) + extra;
 316       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 317
 318       if (vmesa->depth.map)
 319          via_free_draw_buffer(vmesa, &vmesa->depth);
 320       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 321          return GL_FALSE;
 322       }
 323    }
 324    else {
 325       if (vmesa->depth.map)
 326          via_free_draw_buffer(vmesa, &vmesa->depth);
 327       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 328    }
 329
 330    /* stencil buffer is same as depth buffer */
 331    vmesa->stencil.handle = vmesa->depth.handle;
 332    vmesa->stencil.size = vmesa->depth.size;
 333    vmesa->stencil.offset = vmesa->depth.offset;
 334    vmesa->stencil.index = vmesa->depth.index;
 335    vmesa->stencil.pitch = vmesa->depth.pitch;
 336    vmesa->stencil.bpp = vmesa->depth.bpp;
 337    vmesa->stencil.map = vmesa->depth.map;
 338    vmesa->stencil.orig = vmesa->depth.orig;
 339    vmesa->stencil.origMap = vmesa->depth.origMap;
 340
 341    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 342        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 343       vmesa->doPageFlip = vmesa->allowPageFlip;
 344       if (vmesa->hasBack) {
 345          assert(vmesa->back.pitch == vmesa->front.pitch);
 346       }
 347    }
 348    else
 349       vmesa->doPageFlip = GL_FALSE;
 350
 351    return GL_TRUE;
 352 }
 353
 354
 355 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 356                           GLuint width, GLuint height)
 357 {
 358     struct via_context *vmesa = VIA_CONTEXT(ctx);
 359
 360     calculate_buffer_parameters(vmesa, drawbuffer, vmesa->driDrawable);
 361
 362     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 363 }
 364
 365 /* Extension strings exported by the Unichrome driver.
 366  */
 367 static const struct dri_extension card_extensions[] =
 368 {
 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                  __DRIcontext *driContextPriv,
 461                  void *sharedContextPrivate)
 462 {
 463     GLcontext *ctx, *shareCtx;
 464     struct via_context *vmesa;
 465     __DRIscreen *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->Const.MaxDrawBuffers = 1;
 579
 580     ctx->Driver.GetString = viaGetString;
 581
 582     ctx->DriverCtx = (void *)vmesa;
 583     vmesa->glCtx = ctx;
 584
 585     /* Initialize the software rasterizer and helper modules.
 586      */
 587     _swrast_CreateContext(ctx);
 588     _vbo_CreateContext(ctx);
 589     _tnl_CreateContext(ctx);
 590     _swsetup_CreateContext(ctx);
 591
 592     /* Install the customized pipeline:
 593      */
 594     _tnl_destroy_pipeline(ctx);
 595     _tnl_install_pipeline(ctx, via_pipeline);
 596
 597     /* Configure swrast and T&L to match hardware characteristics:
 598      */
 599     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 600     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 601     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 602     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 603
 604     vmesa->hHWContext = driContextPriv->hHWContext;
 605     vmesa->driFd = sPriv->fd;
 606     vmesa->driHwLock = &sPriv->pSAREA->lock;
 607
 608     vmesa->viaScreen = viaScreen;
 609     vmesa->driScreen = sPriv;
 610     vmesa->sarea = saPriv;
 611
 612     vmesa->renderIndex = ~0;
 613     vmesa->setupIndex = ~0;
 614     vmesa->hwPrimitive = GL_POLYGON+1;
 615
 616     /* KW: Hardwire this.  Was previously set bogusly in
 617      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 618      */
 619     vmesa->drawType = GLX_WINDOW_BIT;
 620
 621
 622     _math_matrix_ctr(&vmesa->ViewportMatrix);
 623
 624     /* Do this early, before VIA_FLUSH_DMA can be called:
 625      */
 626     if (!AllocateDmaBuffer(vmesa)) {
 627         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 628         FreeBuffer(vmesa);
 629         FREE(vmesa);
 630         return GL_FALSE;
 631     }
 632
 633     /* Allocate a small piece of fb memory for synchronization:
 634      */
 635     vmesa->breadcrumb.bpp = 32;
 636     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 637     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 638
 639     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 640         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 641         FreeBuffer(vmesa);
 642         FREE(vmesa);
 643         return GL_FALSE;
 644     }
 645
 646     driInitExtensions( ctx, card_extensions, GL_TRUE );
 647     viaInitStateFuncs(ctx);
 648     viaInitTriFuncs(ctx);
 649     viaInitSpanFuncs(ctx);
 650     viaInitIoctlFuncs(ctx);
 651     viaInitState(ctx);
 652
 653     if (getenv("VIA_DEBUG"))
 654        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 655                                         debug_control );
 656
 657     if (getenv("VIA_NO_RAST") ||
 658         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 659        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 660
 661     if (getenv("VIA_PAGEFLIP"))
 662        vmesa->allowPageFlip = 1;
 663
 664     (*sPriv->systemTime->getUST)( &vmesa->swap_ust );
 665
 666
 667     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 668     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 669     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 670     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 671     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 672     vmesa->agpBase = viaScreen->agpBase;
 673
 674
 675     return GL_TRUE;
 676 }
 677
 678 void
 679 viaDestroyContext(__DRIcontext *driContextPriv)
 680 {
 681     GET_CURRENT_CONTEXT(ctx);
 682     struct via_context *vmesa =
 683        (struct via_context *)driContextPriv->driverPrivate;
 684     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 685
 686     assert(vmesa); /* should never be null */
 687
 688     if (vmesa->driDrawable) {
 689        viaWaitIdle(vmesa, GL_FALSE);
 690
 691        if (vmesa->doPageFlip) {
 692           LOCK_HARDWARE(vmesa);
 693           if (vmesa->pfCurrentOffset != 0) {
 694              fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 695              viaResetPageFlippingLocked(vmesa);
 696           }
 697           UNLOCK_HARDWARE(vmesa);
 698        }
 699     }
 700
 701     /* check if we're deleting the currently bound context */
 702     if (vmesa == current) {
 703       VIA_FLUSH_DMA(vmesa);
 704       _mesa_make_current(NULL, NULL, NULL);
 705     }
 706
 707     _swsetup_DestroyContext(vmesa->glCtx);
 708     _tnl_DestroyContext(vmesa->glCtx);
 709     _vbo_DestroyContext(vmesa->glCtx);
 710     _swrast_DestroyContext(vmesa->glCtx);
 711     /* free the Mesa context */
 712     _mesa_destroy_context(vmesa->glCtx);
 713     /* release our data */
 714     FreeBuffer(vmesa);
 715
 716     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 717     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 718     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 719     assert (is_empty_list(&vmesa->freed_tex_buffers));
 720
 721     driDestroyOptionCache(&vmesa->optionCache);
 722
 723     FREE(vmesa);
 724 }
 725
 726
 727 void viaXMesaWindowMoved(struct via_context *vmesa)
 728 {
 729    __DRIdrawable *const drawable = vmesa->driDrawable;
 730    __DRIdrawable *const readable = vmesa->driReadable;
 731    struct via_renderbuffer * draw_buffer;
 732    struct via_renderbuffer * read_buffer;
 733    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 734
 735    if (!drawable)
 736       return;
 737
 738    draw_buffer =  (struct via_renderbuffer *) drawable->driverPrivate;
 739    read_buffer =  (struct via_renderbuffer *) readable->driverPrivate;
 740
 741    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
 742    case BUFFER_BACK_LEFT:
 743       if (drawable->numBackClipRects == 0) {
 744          vmesa->numClipRects = drawable->numClipRects;
 745          vmesa->pClipRects = drawable->pClipRects;
 746       }
 747       else {
 748          vmesa->numClipRects = drawable->numBackClipRects;
 749          vmesa->pClipRects = drawable->pBackClipRects;
 750       }
 751       break;
 752    case BUFFER_FRONT_LEFT:
 753       vmesa->numClipRects = drawable->numClipRects;
 754       vmesa->pClipRects = drawable->pClipRects;
 755       break;
 756    default:
 757       vmesa->numClipRects = 0;
 758       break;
 759    }
 760
 761    if ((draw_buffer->drawW != drawable->w)
 762        || (draw_buffer->drawH != drawable->h)) {
 763       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 764                                   drawable);
 765    }
 766
 767    draw_buffer->drawX = drawable->x;
 768    draw_buffer->drawY = drawable->y;
 769    draw_buffer->drawW = drawable->w;
 770    draw_buffer->drawH = drawable->h;
 771
 772    if (drawable != readable) {
 773       if ((read_buffer->drawW != readable->w)
 774           || (read_buffer->drawH != readable->h)) {
 775          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 776                                      readable);
 777       }
 778
 779       read_buffer->drawX = readable->x;
 780       read_buffer->drawY = readable->y;
 781       read_buffer->drawW = readable->w;
 782       read_buffer->drawH = readable->h;
 783    }
 784
 785    vmesa->front.orig = (vmesa->front.offset +
 786                         draw_buffer->drawY * vmesa->front.pitch +
 787                         draw_buffer->drawX * bytePerPixel);
 788
 789    vmesa->front.origMap = (vmesa->front.map +
 790                         draw_buffer->drawY * vmesa->front.pitch +
 791                         draw_buffer->drawX * bytePerPixel);
 792
 793    vmesa->back.orig = (vmesa->back.offset +
 794                         draw_buffer->drawY * vmesa->back.pitch +
 795                         draw_buffer->drawX * bytePerPixel);
 796
 797    vmesa->back.origMap = (vmesa->back.map +
 798                         draw_buffer->drawY * vmesa->back.pitch +
 799                         draw_buffer->drawX * bytePerPixel);
 800
 801    vmesa->depth.orig = (vmesa->depth.offset +
 802                         draw_buffer->drawY * vmesa->depth.pitch +
 803                         draw_buffer->drawX * bytePerPixel);
 804
 805    vmesa->depth.origMap = (vmesa->depth.map +
 806                         draw_buffer->drawY * vmesa->depth.pitch +
 807                         draw_buffer->drawX * bytePerPixel);
 808
 809    viaCalcViewport(vmesa->glCtx);
 810 }
 811
 812 GLboolean
 813 viaUnbindContext(__DRIcontext *driContextPriv)
 814 {
 815     return GL_TRUE;
 816 }
 817
 818 GLboolean
 819 viaMakeCurrent(__DRIcontext *driContextPriv,
 820                __DRIdrawable *driDrawPriv,
 821                __DRIdrawable *driReadPriv)
 822 {
 823     if (VIA_DEBUG & DEBUG_DRI) {
 824         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 825         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 826         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 827     }
 828
 829     if (driContextPriv) {
 830         struct via_context *vmesa =
 831            (struct via_context *)driContextPriv->driverPrivate;
 832         GLcontext *ctx = vmesa->glCtx;
 833         struct gl_framebuffer *drawBuffer, *readBuffer;
 834
 835         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 836         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 837
 838        if ((vmesa->driDrawable != driDrawPriv)
 839            || (vmesa->driReadable != driReadPriv)) {
 840           if (driDrawPriv->swap_interval == (unsigned)-1) {
 841              driDrawPriv->vblFlags =
 842                 vmesa->viaScreen->irqEnabled ?
 843                 driGetDefaultVBlankFlags(&vmesa->optionCache) :
 844                 VBLANK_FLAG_NO_IRQ;
 845
 846              driDrawableInitVBlank(driDrawPriv);
 847           }
 848
 849           vmesa->driDrawable = driDrawPriv;
 850           vmesa->driReadable = driReadPriv;
 851
 852           if ((drawBuffer->Width != driDrawPriv->w)
 853               || (drawBuffer->Height != driDrawPriv->h)) {
 854              _mesa_resize_framebuffer(ctx, drawBuffer,
 855                                       driDrawPriv->w, driDrawPriv->h);
 856              drawBuffer->Initialized = GL_TRUE;
 857           }
 858
 859           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 860              return GL_FALSE;
 861           }
 862
 863           if (driDrawPriv != driReadPriv) {
 864              if ((readBuffer->Width != driReadPriv->w)
 865                  || (readBuffer->Height != driReadPriv->h)) {
 866                 _mesa_resize_framebuffer(ctx, readBuffer,
 867                                          driReadPriv->w, driReadPriv->h);
 868                 readBuffer->Initialized = GL_TRUE;
 869              }
 870
 871              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 872                 return GL_FALSE;
 873              }
 874           }
 875        }
 876
 877         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 878
 879         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 880
 881         viaXMesaWindowMoved(vmesa);
 882         ctx->Driver.Scissor(vmesa->glCtx,
 883                             vmesa->glCtx->Scissor.X,
 884                             vmesa->glCtx->Scissor.Y,
 885                             vmesa->glCtx->Scissor.Width,
 886                             vmesa->glCtx->Scissor.Height);
 887     }
 888     else {
 889         _mesa_make_current(NULL, NULL, NULL);
 890     }
 891
 892     return GL_TRUE;
 893 }
 894
 895 void viaGetLock(struct via_context *vmesa, GLuint flags)
 896 {
 897     __DRIdrawable *dPriv = vmesa->driDrawable;
 898     __DRIscreen *sPriv = vmesa->driScreen;
 899
 900     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 901
 902     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 903     if (dPriv != vmesa->driReadable) {
 904         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 905     }
 906
 907     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 908        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 909        vmesa->newEmitState = ~0;
 910     }
 911
 912     if (vmesa->lastStamp != dPriv->lastStamp) {
 913        viaXMesaWindowMoved(vmesa);
 914        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 915        vmesa->newEmitState = ~0;
 916        vmesa->lastStamp = dPriv->lastStamp;
 917     }
 918
 919     if (vmesa->doPageFlip &&
 920         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 921        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 922        viaResetPageFlippingLocked(vmesa);
 923     }
 924 }
 925
 926
 927 void
 928 viaSwapBuffers(__DRIdrawable *drawablePrivate)
 929 {
 930     __DRIdrawable *dPriv = (__DRIdrawable *)drawablePrivate;
 931
 932     if (dPriv &&
 933         dPriv->driContextPriv &&
 934         dPriv->driContextPriv->driverPrivate) {
 935         struct via_context *vmesa =
 936            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 937         GLcontext *ctx = vmesa->glCtx;
 938
 939         _mesa_notifySwapBuffers(ctx);
 940
 941         if (ctx->Visual.doubleBufferMode) {
 942             if (vmesa->doPageFlip) {
 943                 viaPageFlip(dPriv);
 944             }
 945             else {
 946                 viaCopyBuffer(dPriv);
 947             }
 948         }
 949         else
 950             VIA_FLUSH_DMA(vmesa);
 951     }
 952     else {
 953         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 954     }
 955 }