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/matrix.h"
  37 #include "main/state.h"
  38 #include "main/simple_list.h"
  39 #include "main/extensions.h"
  40 #include "main/framebuffer.h"
  41 #include "main/renderbuffer.h"
  42
  43 #include "swrast/swrast.h"
  44 #include "swrast_setup/swrast_setup.h"
  45 #include "tnl/tnl.h"
  46 #include "vbo/vbo.h"
  47
  48 #include "tnl/t_pipeline.h"
  49
  50 #include "drivers/common/driverfuncs.h"
  51
  52 #include "via_screen.h"
  53 #include "via_dri.h"
  54
  55 #include "via_state.h"
  56 #include "via_tex.h"
  57 #include "via_span.h"
  58 #include "via_tris.h"
  59 #include "via_ioctl.h"
  60 #include "via_fb.h"
  61
  62 #include <stdio.h>
  63 #include "main/macros.h"
  64 #include "drirenderbuffer.h"
  65
  66 #define need_GL_ARB_point_parameters
  67 #define need_GL_EXT_fog_coord
  68 #define need_GL_EXT_secondary_color
  69 #include "main/remap_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                     __DRIdrawable *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->Format = MESA_FORMAT_ARGB8888;
 168       rb->DataType = GL_UNSIGNED_BYTE;
 169    }
 170    else if (format == GL_DEPTH_COMPONENT16) {
 171       /* Depth */
 172       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 173       /* we always Get/Put 32-bit Z values */
 174       rb->Format = MESA_FORMAT_Z16;
 175       rb->DataType = GL_UNSIGNED_INT;
 176    }
 177    else if (format == GL_DEPTH_COMPONENT24) {
 178       /* Depth */
 179       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 180       /* we always Get/Put 32-bit Z values */
 181       rb->Format = MESA_FORMAT_Z32;
 182       rb->DataType = GL_UNSIGNED_INT;
 183    }
 184    else {
 185       /* Stencil */
 186       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 187       rb->_BaseFormat = GL_STENCIL_INDEX;
 188       rb->Format = MESA_FORMAT_S8;
 189       rb->DataType = GL_UNSIGNED_BYTE;
 190    }
 191
 192    rb->Delete = viaDeleteRenderbuffer;
 193    rb->AllocStorage = viaRenderbufferStorage;
 194 }
 195
 196
 197 /**
 198  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 199  * and stencil) associated with the specified context.
 200  *
 201  * \warning
 202  * This function also calls \c AllocateBuffer to actually allocate the
 203  * buffers.
 204  *
 205  * \sa AllocateBuffer
 206  */
 207 static GLboolean
 208 calculate_buffer_parameters(struct via_context *vmesa,
 209                             struct gl_framebuffer *fb,
 210                             __DRIdrawable *dPriv)
 211 {
 212    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 213    const unsigned extra = 32;
 214    unsigned w;
 215    unsigned h;
 216
 217    /* Normally, the renderbuffer would be added to the framebuffer just once
 218     * when the framebuffer was created.  The VIA driver is a bit funny
 219     * though in that the front/back/depth renderbuffers are in the per-context
 220     * state!
 221     * That should be fixed someday.
 222     */
 223
 224    if (!vmesa->front.Base.InternalFormat) {
 225       /* do one-time init for the renderbuffers */
 226       viaInitRenderbuffer(&vmesa->front, GL_RGBA, dPriv);
 227       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 228       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 229
 230       if (fb->Visual.doubleBufferMode) {
 231          viaInitRenderbuffer(&vmesa->back, GL_RGBA, dPriv);
 232          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 233          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 234       }
 235
 236       if (vmesa->glCtx->Visual.depthBits > 0) {
 237          viaInitRenderbuffer(&vmesa->depth,
 238                              (vmesa->glCtx->Visual.depthBits == 16
 239                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24),
 240                              dPriv);
 241          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 242          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 243       }
 244
 245       if (vmesa->glCtx->Visual.stencilBits > 0) {
 246          viaInitRenderbuffer(&vmesa->stencil, GL_STENCIL_INDEX8_EXT,
 247                              dPriv);
 248          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 249          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 250       }
 251    }
 252
 253    assert(vmesa->front.Base.InternalFormat);
 254    assert(vmesa->front.Base.AllocStorage);
 255    if (fb->Visual.doubleBufferMode) {
 256       assert(vmesa->back.Base.AllocStorage);
 257    }
 258    if (fb->Visual.depthBits) {
 259       assert(vmesa->depth.Base.AllocStorage);
 260    }
 261
 262
 263    /* Allocate front-buffer */
 264    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 265       w = vmesa->driDrawable->w;
 266       h = vmesa->driDrawable->h;
 267
 268       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 269       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 270       vmesa->front.size = vmesa->front.pitch * h;
 271
 272       if (vmesa->front.map)
 273          via_free_draw_buffer(vmesa, &vmesa->front);
 274       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 275          return GL_FALSE;
 276
 277    } else {
 278       w = vmesa->viaScreen->width;
 279       h = vmesa->viaScreen->height;
 280
 281       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 282       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 283       vmesa->front.size = vmesa->front.pitch * h;
 284       if (getenv("ALTERNATE_SCREEN"))
 285         vmesa->front.offset = vmesa->front.size;
 286       else
 287         vmesa->front.offset = 0;
 288       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 289    }
 290
 291
 292    /* Allocate back-buffer */
 293    if (vmesa->hasBack) {
 294       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 295       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 296       vmesa->back.pitch += extra;
 297       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 298       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 299       if (vmesa->back.map)
 300          via_free_draw_buffer(vmesa, &vmesa->back);
 301       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 302          return GL_FALSE;
 303    }
 304    else {
 305       if (vmesa->back.map)
 306          via_free_draw_buffer(vmesa, &vmesa->back);
 307       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 308    }
 309
 310
 311    /* Allocate depth-buffer */
 312    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 313       vmesa->depth.bpp = vmesa->depthBits;
 314       if (vmesa->depth.bpp == 24)
 315          vmesa->depth.bpp = 32;
 316
 317       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 318                             (vmesa->depth.bpp/8)) + extra;
 319       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 320
 321       if (vmesa->depth.map)
 322          via_free_draw_buffer(vmesa, &vmesa->depth);
 323       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 324          return GL_FALSE;
 325       }
 326    }
 327    else {
 328       if (vmesa->depth.map)
 329          via_free_draw_buffer(vmesa, &vmesa->depth);
 330       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 331    }
 332
 333    /* stencil buffer is same as depth buffer */
 334    vmesa->stencil.handle = vmesa->depth.handle;
 335    vmesa->stencil.size = vmesa->depth.size;
 336    vmesa->stencil.offset = vmesa->depth.offset;
 337    vmesa->stencil.index = vmesa->depth.index;
 338    vmesa->stencil.pitch = vmesa->depth.pitch;
 339    vmesa->stencil.bpp = vmesa->depth.bpp;
 340    vmesa->stencil.map = vmesa->depth.map;
 341    vmesa->stencil.orig = vmesa->depth.orig;
 342    vmesa->stencil.origMap = vmesa->depth.origMap;
 343
 344    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 345        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 346       vmesa->doPageFlip = vmesa->allowPageFlip;
 347       if (vmesa->hasBack) {
 348          assert(vmesa->back.pitch == vmesa->front.pitch);
 349       }
 350    }
 351    else
 352       vmesa->doPageFlip = GL_FALSE;
 353
 354    return GL_TRUE;
 355 }
 356
 357
 358 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 359                           GLuint width, GLuint height)
 360 {
 361     struct via_context *vmesa = VIA_CONTEXT(ctx);
 362
 363     calculate_buffer_parameters(vmesa, drawbuffer, vmesa->driDrawable);
 364
 365     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 366 }
 367
 368 /* Extension strings exported by the Unichrome driver.
 369  */
 370 static const struct dri_extension card_extensions[] =
 371 {
 372     { "GL_ARB_multitexture",               NULL },
 373     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 374     { "GL_ARB_texture_env_add",            NULL },
 375     { "GL_ARB_texture_env_combine",        NULL },
 376 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 377     { "GL_ARB_texture_mirrored_repeat",    NULL },
 378     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 379     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 380     { "GL_EXT_stencil_wrap",               NULL },
 381     { "GL_EXT_texture_env_combine",        NULL },
 382 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 383     { "GL_EXT_texture_lod_bias",           NULL },
 384     { "GL_NV_blend_square",                NULL },
 385     { NULL,                                NULL }
 386 };
 387
 388 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 389 extern const struct tnl_pipeline_stage _via_render_stage;
 390
 391 static const struct tnl_pipeline_stage *via_pipeline[] = {
 392     &_tnl_vertex_transform_stage,
 393     &_tnl_normal_transform_stage,
 394     &_tnl_lighting_stage,
 395     &_tnl_fog_coordinate_stage,
 396     &_tnl_texgen_stage,
 397     &_tnl_texture_transform_stage,
 398     /* REMOVE: point attenuation stage */
 399 #if 1
 400     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 401 #endif
 402     &_tnl_render_stage,
 403     0,
 404 };
 405
 406
 407 static const struct dri_debug_control debug_control[] =
 408 {
 409     { "fall",  DEBUG_FALLBACKS },
 410     { "tex",   DEBUG_TEXTURE },
 411     { "ioctl", DEBUG_IOCTL },
 412     { "prim",  DEBUG_PRIMS },
 413     { "vert",  DEBUG_VERTS },
 414     { "state", DEBUG_STATE },
 415     { "verb",  DEBUG_VERBOSE },
 416     { "dri",   DEBUG_DRI },
 417     { "dma",   DEBUG_DMA },
 418     { "san",   DEBUG_SANITY },
 419     { "sync",  DEBUG_SYNC },
 420     { "sleep", DEBUG_SLEEP },
 421     { "pix",   DEBUG_PIXEL },
 422     { "2d",    DEBUG_2D },
 423     { NULL,    0 }
 424 };
 425
 426
 427 static GLboolean
 428 AllocateDmaBuffer(struct via_context *vmesa)
 429 {
 430     if (vmesa->dma)
 431         via_free_dma_buffer(vmesa);
 432
 433     if (!via_alloc_dma_buffer(vmesa))
 434         return GL_FALSE;
 435
 436     vmesa->dmaLow = 0;
 437     vmesa->dmaCliprectAddr = ~0;
 438     return GL_TRUE;
 439 }
 440
 441 static void
 442 FreeBuffer(struct via_context *vmesa)
 443 {
 444     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 445         via_free_draw_buffer(vmesa, &vmesa->front);
 446
 447     if (vmesa->back.map)
 448         via_free_draw_buffer(vmesa, &vmesa->back);
 449
 450     if (vmesa->depth.map)
 451         via_free_draw_buffer(vmesa, &vmesa->depth);
 452
 453     if (vmesa->breadcrumb.map)
 454         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 455
 456     if (vmesa->dma)
 457         via_free_dma_buffer(vmesa);
 458 }
 459
 460
 461 GLboolean
 462 viaCreateContext(const __GLcontextModes *visual,
 463                  __DRIcontext *driContextPriv,
 464                  void *sharedContextPrivate)
 465 {
 466     GLcontext *ctx, *shareCtx;
 467     struct via_context *vmesa;
 468     __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 469     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 470     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 471         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 472     struct dd_function_table functions;
 473
 474     /* Allocate via context */
 475     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 476     if (!vmesa) {
 477         return GL_FALSE;
 478     }
 479
 480     /* Parse configuration files.
 481      */
 482     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 483                          sPriv->myNum, "unichrome");
 484
 485     /* pick back buffer */
 486     vmesa->hasBack = visual->doubleBufferMode;
 487
 488     switch(visual->depthBits) {
 489     case 0:
 490        vmesa->hasDepth = GL_FALSE;
 491        vmesa->depthBits = 0;
 492        vmesa->depth_max = 1.0;
 493        break;
 494     case 16:
 495        vmesa->hasDepth = GL_TRUE;
 496        vmesa->depthBits = visual->depthBits;
 497        vmesa->have_hw_stencil = GL_FALSE;
 498        vmesa->depth_max = (GLfloat)0xffff;
 499        vmesa->depth_clear_mask = 0xf << 28;
 500        vmesa->ClearDepth = 0xffff;
 501        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 502        break;
 503     case 24:
 504        vmesa->hasDepth = GL_TRUE;
 505        vmesa->depthBits = visual->depthBits;
 506        vmesa->depth_max = (GLfloat) 0xffffff;
 507        vmesa->depth_clear_mask = 0xe << 28;
 508        vmesa->ClearDepth = 0xffffff00;
 509
 510        assert(visual->haveStencilBuffer);
 511        assert(visual->stencilBits == 8);
 512
 513        vmesa->have_hw_stencil = GL_TRUE;
 514        vmesa->stencilBits = visual->stencilBits;
 515        vmesa->stencil_clear_mask = 0x1 << 28;
 516        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 517        break;
 518     case 32:
 519        vmesa->hasDepth = GL_TRUE;
 520        vmesa->depthBits = visual->depthBits;
 521        assert(!visual->haveStencilBuffer);
 522        vmesa->have_hw_stencil = GL_FALSE;
 523        vmesa->depth_max = (GLfloat)0xffffffff;
 524        vmesa->depth_clear_mask = 0xf << 28;
 525        vmesa->ClearDepth = 0xffffffff;
 526        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 527        break;
 528     default:
 529        assert(0);
 530        break;
 531     }
 532
 533     make_empty_list(&vmesa->freed_tex_buffers);
 534     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 535     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 536     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 537
 538     _mesa_init_driver_functions(&functions);
 539     viaInitTextureFuncs(&functions);
 540
 541     /* Allocate the Mesa context */
 542     if (sharedContextPrivate)
 543         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 544     else
 545         shareCtx = NULL;
 546
 547     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 548                                         (void*) vmesa);
 549
 550     vmesa->shareCtx = shareCtx;
 551
 552     if (!vmesa->glCtx) {
 553         FREE(vmesa);
 554         return GL_FALSE;
 555     }
 556     driContextPriv->driverPrivate = vmesa;
 557
 558     ctx = vmesa->glCtx;
 559
 560     if (driQueryOptionb(&vmesa->optionCache, "excess_mipmap"))
 561         ctx->Const.MaxTextureLevels = 11;
 562     else
 563         ctx->Const.MaxTextureLevels = 10;
 564
 565     ctx->Const.MaxTextureUnits = 2;
 566     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 567     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 568
 569     ctx->Const.MinLineWidth = 1.0;
 570     ctx->Const.MinLineWidthAA = 1.0;
 571     ctx->Const.MaxLineWidth = 1.0;
 572     ctx->Const.MaxLineWidthAA = 1.0;
 573     ctx->Const.LineWidthGranularity = 1.0;
 574
 575     ctx->Const.MinPointSize = 1.0;
 576     ctx->Const.MinPointSizeAA = 1.0;
 577     ctx->Const.MaxPointSize = 1.0;
 578     ctx->Const.MaxPointSizeAA = 1.0;
 579     ctx->Const.PointSizeGranularity = 1.0;
 580
 581     ctx->Const.MaxDrawBuffers = 1;
 582
 583     ctx->Driver.GetString = viaGetString;
 584
 585     ctx->DriverCtx = (void *)vmesa;
 586     vmesa->glCtx = ctx;
 587
 588     /* Initialize the software rasterizer and helper modules.
 589      */
 590     _swrast_CreateContext(ctx);
 591     _vbo_CreateContext(ctx);
 592     _tnl_CreateContext(ctx);
 593     _swsetup_CreateContext(ctx);
 594
 595     /* Install the customized pipeline:
 596      */
 597     _tnl_destroy_pipeline(ctx);
 598     _tnl_install_pipeline(ctx, via_pipeline);
 599
 600     /* Configure swrast and T&L to match hardware characteristics:
 601      */
 602     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 603     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 604     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 605     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 606
 607     vmesa->hHWContext = driContextPriv->hHWContext;
 608     vmesa->driFd = sPriv->fd;
 609     vmesa->driHwLock = &sPriv->pSAREA->lock;
 610
 611     vmesa->viaScreen = viaScreen;
 612     vmesa->driScreen = sPriv;
 613     vmesa->sarea = saPriv;
 614
 615     vmesa->renderIndex = ~0;
 616     vmesa->setupIndex = ~0;
 617     vmesa->hwPrimitive = GL_POLYGON+1;
 618
 619     /* KW: Hardwire this.  Was previously set bogusly in
 620      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 621      */
 622     vmesa->drawType = GLX_WINDOW_BIT;
 623
 624
 625     _math_matrix_ctr(&vmesa->ViewportMatrix);
 626
 627     /* Do this early, before VIA_FLUSH_DMA can be called:
 628      */
 629     if (!AllocateDmaBuffer(vmesa)) {
 630         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 631         FreeBuffer(vmesa);
 632         FREE(vmesa);
 633         return GL_FALSE;
 634     }
 635
 636     /* Allocate a small piece of fb memory for synchronization:
 637      */
 638     vmesa->breadcrumb.bpp = 32;
 639     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 640     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 641
 642     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 643         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 644         FreeBuffer(vmesa);
 645         FREE(vmesa);
 646         return GL_FALSE;
 647     }
 648
 649     driInitExtensions( ctx, card_extensions, GL_TRUE );
 650     viaInitStateFuncs(ctx);
 651     viaInitTriFuncs(ctx);
 652     viaInitSpanFuncs(ctx);
 653     viaInitIoctlFuncs(ctx);
 654     viaInitState(ctx);
 655
 656     if (getenv("VIA_DEBUG"))
 657        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 658                                         debug_control );
 659
 660     if (getenv("VIA_NO_RAST") ||
 661         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 662        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 663
 664     if (getenv("VIA_PAGEFLIP"))
 665        vmesa->allowPageFlip = 1;
 666
 667     (*sPriv->systemTime->getUST)( &vmesa->swap_ust );
 668
 669
 670     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 671     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 672     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 673     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 674     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 675     vmesa->agpBase = viaScreen->agpBase;
 676
 677
 678     return GL_TRUE;
 679 }
 680
 681 void
 682 viaDestroyContext(__DRIcontext *driContextPriv)
 683 {
 684     GET_CURRENT_CONTEXT(ctx);
 685     struct via_context *vmesa =
 686        (struct via_context *)driContextPriv->driverPrivate;
 687     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 688
 689     assert(vmesa); /* should never be null */
 690
 691     if (vmesa->driDrawable) {
 692        viaWaitIdle(vmesa, GL_FALSE);
 693
 694        if (vmesa->doPageFlip) {
 695           LOCK_HARDWARE(vmesa);
 696           if (vmesa->pfCurrentOffset != 0) {
 697              fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 698              viaResetPageFlippingLocked(vmesa);
 699           }
 700           UNLOCK_HARDWARE(vmesa);
 701        }
 702     }
 703
 704     /* check if we're deleting the currently bound context */
 705     if (vmesa == current) {
 706       VIA_FLUSH_DMA(vmesa);
 707       _mesa_make_current(NULL, NULL, NULL);
 708     }
 709
 710     _swsetup_DestroyContext(vmesa->glCtx);
 711     _tnl_DestroyContext(vmesa->glCtx);
 712     _vbo_DestroyContext(vmesa->glCtx);
 713     _swrast_DestroyContext(vmesa->glCtx);
 714     /* free the Mesa context */
 715     _mesa_destroy_context(vmesa->glCtx);
 716     /* release our data */
 717     FreeBuffer(vmesa);
 718
 719     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 720     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 721     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 722     assert (is_empty_list(&vmesa->freed_tex_buffers));
 723
 724     driDestroyOptionCache(&vmesa->optionCache);
 725
 726     FREE(vmesa);
 727 }
 728
 729
 730 void viaXMesaWindowMoved(struct via_context *vmesa)
 731 {
 732    __DRIdrawable *const drawable = vmesa->driDrawable;
 733    __DRIdrawable *const readable = vmesa->driReadable;
 734    struct via_renderbuffer * draw_buffer;
 735    struct via_renderbuffer * read_buffer;
 736    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 737
 738    if (!drawable)
 739       return;
 740
 741    draw_buffer =  (struct via_renderbuffer *) drawable->driverPrivate;
 742    read_buffer =  (struct via_renderbuffer *) readable->driverPrivate;
 743
 744    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
 745    case BUFFER_BACK_LEFT:
 746       if (drawable->numBackClipRects == 0) {
 747          vmesa->numClipRects = drawable->numClipRects;
 748          vmesa->pClipRects = drawable->pClipRects;
 749       }
 750       else {
 751          vmesa->numClipRects = drawable->numBackClipRects;
 752          vmesa->pClipRects = drawable->pBackClipRects;
 753       }
 754       break;
 755    case BUFFER_FRONT_LEFT:
 756       vmesa->numClipRects = drawable->numClipRects;
 757       vmesa->pClipRects = drawable->pClipRects;
 758       break;
 759    default:
 760       vmesa->numClipRects = 0;
 761       break;
 762    }
 763
 764    if ((draw_buffer->drawW != drawable->w)
 765        || (draw_buffer->drawH != drawable->h)) {
 766       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 767                                   drawable);
 768    }
 769
 770    draw_buffer->drawX = drawable->x;
 771    draw_buffer->drawY = drawable->y;
 772    draw_buffer->drawW = drawable->w;
 773    draw_buffer->drawH = drawable->h;
 774
 775    if (drawable != readable) {
 776       if ((read_buffer->drawW != readable->w)
 777           || (read_buffer->drawH != readable->h)) {
 778          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 779                                      readable);
 780       }
 781
 782       read_buffer->drawX = readable->x;
 783       read_buffer->drawY = readable->y;
 784       read_buffer->drawW = readable->w;
 785       read_buffer->drawH = readable->h;
 786    }
 787
 788    vmesa->front.orig = (vmesa->front.offset +
 789                         draw_buffer->drawY * vmesa->front.pitch +
 790                         draw_buffer->drawX * bytePerPixel);
 791
 792    vmesa->front.origMap = (vmesa->front.map +
 793                         draw_buffer->drawY * vmesa->front.pitch +
 794                         draw_buffer->drawX * bytePerPixel);
 795
 796    vmesa->back.orig = (vmesa->back.offset +
 797                         draw_buffer->drawY * vmesa->back.pitch +
 798                         draw_buffer->drawX * bytePerPixel);
 799
 800    vmesa->back.origMap = (vmesa->back.map +
 801                         draw_buffer->drawY * vmesa->back.pitch +
 802                         draw_buffer->drawX * bytePerPixel);
 803
 804    vmesa->depth.orig = (vmesa->depth.offset +
 805                         draw_buffer->drawY * vmesa->depth.pitch +
 806                         draw_buffer->drawX * bytePerPixel);
 807
 808    vmesa->depth.origMap = (vmesa->depth.map +
 809                         draw_buffer->drawY * vmesa->depth.pitch +
 810                         draw_buffer->drawX * bytePerPixel);
 811
 812    viaCalcViewport(vmesa->glCtx);
 813 }
 814
 815 GLboolean
 816 viaUnbindContext(__DRIcontext *driContextPriv)
 817 {
 818     return GL_TRUE;
 819 }
 820
 821 GLboolean
 822 viaMakeCurrent(__DRIcontext *driContextPriv,
 823                __DRIdrawable *driDrawPriv,
 824                __DRIdrawable *driReadPriv)
 825 {
 826     if (VIA_DEBUG & DEBUG_DRI) {
 827         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 828         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 829         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 830     }
 831
 832     if (driContextPriv) {
 833         struct via_context *vmesa =
 834            (struct via_context *)driContextPriv->driverPrivate;
 835         GLcontext *ctx = vmesa->glCtx;
 836         struct gl_framebuffer *drawBuffer, *readBuffer;
 837
 838         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 839         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 840
 841        if ((vmesa->driDrawable != driDrawPriv)
 842            || (vmesa->driReadable != driReadPriv)) {
 843           if (driDrawPriv->swap_interval == (unsigned)-1) {
 844              driDrawPriv->vblFlags =
 845                 vmesa->viaScreen->irqEnabled ?
 846                 driGetDefaultVBlankFlags(&vmesa->optionCache) :
 847                 VBLANK_FLAG_NO_IRQ;
 848
 849              driDrawableInitVBlank(driDrawPriv);
 850           }
 851
 852           vmesa->driDrawable = driDrawPriv;
 853           vmesa->driReadable = driReadPriv;
 854
 855           if ((drawBuffer->Width != driDrawPriv->w)
 856               || (drawBuffer->Height != driDrawPriv->h)) {
 857              _mesa_resize_framebuffer(ctx, drawBuffer,
 858                                       driDrawPriv->w, driDrawPriv->h);
 859              drawBuffer->Initialized = GL_TRUE;
 860           }
 861
 862           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 863              return GL_FALSE;
 864           }
 865
 866           if (driDrawPriv != driReadPriv) {
 867              if ((readBuffer->Width != driReadPriv->w)
 868                  || (readBuffer->Height != driReadPriv->h)) {
 869                 _mesa_resize_framebuffer(ctx, readBuffer,
 870                                          driReadPriv->w, driReadPriv->h);
 871                 readBuffer->Initialized = GL_TRUE;
 872              }
 873
 874              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 875                 return GL_FALSE;
 876              }
 877           }
 878        }
 879
 880         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 881
 882         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 883
 884         viaXMesaWindowMoved(vmesa);
 885         ctx->Driver.Scissor(vmesa->glCtx,
 886                             vmesa->glCtx->Scissor.X,
 887                             vmesa->glCtx->Scissor.Y,
 888                             vmesa->glCtx->Scissor.Width,
 889                             vmesa->glCtx->Scissor.Height);
 890     }
 891     else {
 892         _mesa_make_current(NULL, NULL, NULL);
 893     }
 894
 895     return GL_TRUE;
 896 }
 897
 898 void viaGetLock(struct via_context *vmesa, GLuint flags)
 899 {
 900     __DRIdrawable *dPriv = vmesa->driDrawable;
 901     __DRIscreen *sPriv = vmesa->driScreen;
 902
 903     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 904
 905     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 906     if (dPriv != vmesa->driReadable) {
 907         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 908     }
 909
 910     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 911        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 912        vmesa->newEmitState = ~0;
 913     }
 914
 915     if (vmesa->lastStamp != dPriv->lastStamp) {
 916        viaXMesaWindowMoved(vmesa);
 917        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 918        vmesa->newEmitState = ~0;
 919        vmesa->lastStamp = dPriv->lastStamp;
 920     }
 921
 922     if (vmesa->doPageFlip &&
 923         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 924        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 925        viaResetPageFlippingLocked(vmesa);
 926     }
 927 }
 928
 929
 930 void
 931 viaSwapBuffers(__DRIdrawable *drawablePrivate)
 932 {
 933     __DRIdrawable *dPriv = (__DRIdrawable *)drawablePrivate;
 934
 935     if (dPriv &&
 936         dPriv->driContextPriv &&
 937         dPriv->driContextPriv->driverPrivate) {
 938         struct via_context *vmesa =
 939            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 940         GLcontext *ctx = vmesa->glCtx;
 941
 942         _mesa_notifySwapBuffers(ctx);
 943
 944         if (ctx->Visual.doubleBufferMode) {
 945             if (vmesa->doPageFlip) {
 946                 viaPageFlip(dPriv);
 947             }
 948             else {
 949                 viaCopyBuffer(dPriv);
 950             }
 951         }
 952         else
 953             VIA_FLUSH_DMA(vmesa);
 954     }
 955     else {
 956         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 957     }
 958 }