i810context.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

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Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
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/* $XFree86: xc/lib/GL/mesa/src/drv/i810/i810context.c,v 1.3 2002/10/30 12:51:33 alanh Exp $ */

/*
 * Authors:
 *   Keith Whitwell <[e-mail]>
 *
 */


#include "glheader.h"
#include "context.h"
#include "matrix.h"
#include "simple_list.h"
#include "extensions.h"
#include "framebuffer.h"
#include "imports.h"
#include "points.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "tnl/tnl.h"
#include "vbo/vbo.h"

#include "tnl/t_pipeline.h"

#include "drivers/common/driverfuncs.h"

#include "i810screen.h"
#include "i810_dri.h"

#include "i810state.h"
#include "i810tex.h"
#include "i810span.h"
#include "i810tris.h"
#include "i810vb.h"
#include "i810ioctl.h"

#include "drirenderbuffer.h"
#include "utils.h"

#define need_GL_ARB_multisample
#define need_GL_ARB_texture_compression
#define need_GL_ARB_vertex_buffer_object
#include "extension_helper.h"

#ifndef I810_DEBUG
int I810_DEBUG = (0);
#endif

PUBLIC const char __driConfigOptions[] = { 0 };
const GLuint __driNConfigOptions = 0;

#define DRIVER_DATE                     "20050821"

static const GLubyte *i810GetString( GLcontext *ctx, GLenum name )
{
   static char buffer[128];

   switch (name) {
   case GL_VENDOR:
      return (GLubyte *)"Keith Whitwell";
   case GL_RENDERER: {
      i810ContextPtr imesa = I810_CONTEXT(ctx);
      const char * chipset;
      
      switch (imesa->i810Screen->deviceID) {
      case PCI_CHIP_I810:       chipset = "i810"; break;
      case PCI_CHIP_I810_DC100: chipset = "i810 DC-100"; break;
      case PCI_CHIP_I810_E:     chipset = "i810E"; break;
      case PCI_CHIP_I815:       chipset = "i815"; break;
      default:                  chipset = "Unknown i810-class Chipset"; break;
      }

      (void) driGetRendererString( buffer, chipset, DRIVER_DATE, 0 );
      return (GLubyte *) buffer;
   }
   default:
      return 0;
   }
}

static void i810BufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
{
   GET_CURRENT_CONTEXT(ctx);
   i810ContextPtr imesa = I810_CONTEXT(ctx);

   /* Need to lock to make sure the driDrawable is uptodate.  This
    * information is used to resize Mesa's software buffers, so it has
    * to be correct.
    */
   LOCK_HARDWARE(imesa);
   *width = imesa->driDrawable->w;
   *height = imesa->driDrawable->h;
   UNLOCK_HARDWARE(imesa);
}

/* Extension strings exported by the i810 driver.
 */
const struct dri_extension card_extensions[] =
{
    { "GL_ARB_multisample",                GL_ARB_multisample_functions },
    { "GL_ARB_multitexture",               NULL },
    { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
    { "GL_ARB_texture_env_add",            NULL },
    { "GL_ARB_texture_env_combine",        NULL },
    { "GL_ARB_texture_env_crossbar",       NULL },
    { "GL_ARB_texture_mirrored_repeat",    NULL },
    { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
    { "GL_EXT_stencil_wrap",               NULL },
    { "GL_EXT_texture_edge_clamp",         NULL },
    { "GL_EXT_texture_env_combine",        NULL },
    { "GL_EXT_texture_lod_bias",           NULL },
    { "GL_EXT_texture_rectangle",          NULL },
    { "GL_MESA_ycbcr_texture",             NULL },
    { "GL_NV_blend_square",                NULL },
    { "GL_SGIS_generate_mipmap",           NULL },
    { NULL,                                NULL }
};

extern const struct tnl_pipeline_stage _i810_render_stage;

static const struct tnl_pipeline_stage *i810_pipeline[] = {
   &_tnl_vertex_transform_stage,
   &_tnl_normal_transform_stage,
   &_tnl_lighting_stage,
   &_tnl_fog_coordinate_stage,
   &_tnl_texgen_stage,
   &_tnl_texture_transform_stage,
				/* REMOVE: point attenuation stage */
#if 1
   &_i810_render_stage,		/* ADD: unclipped rastersetup-to-dma */
#endif
   &_tnl_render_stage,
   0,
};

static const struct dri_debug_control debug_control[] =
{
    { "fall",  DEBUG_FALLBACKS },
    { "tex",   DEBUG_TEXTURE },
    { "ioctl", DEBUG_IOCTL },
    { "prim",  DEBUG_PRIMS },
    { "vert",  DEBUG_VERTS },
    { "state", DEBUG_STATE },
    { "verb",  DEBUG_VERBOSE },
    { "dri",   DEBUG_DRI },
    { "dma",   DEBUG_DMA },
    { "san",   DEBUG_SANITY },
    { "sync",  DEBUG_SYNC },
    { "sleep", DEBUG_SLEEP },
    { NULL,    0 }
};

GLboolean
i810CreateContext( const __GLcontextModes *mesaVis,
                   __DRIcontextPrivate *driContextPriv,
                   void *sharedContextPrivate )
{
   GLcontext *ctx, *shareCtx;
   i810ContextPtr imesa;
   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
   i810ScreenPrivate *i810Screen = (i810ScreenPrivate *)sPriv->private;
   I810SAREAPtr saPriv = (I810SAREAPtr)
      (((GLubyte *)sPriv->pSAREA) + i810Screen->sarea_priv_offset);
   struct dd_function_table functions;

   /* Allocate i810 context */
   imesa = (i810ContextPtr) CALLOC_STRUCT(i810_context_t);
   if (!imesa) {
      return GL_FALSE;
   }

   driContextPriv->driverPrivate = imesa;

   imesa->i810Screen = i810Screen;
   imesa->driScreen = sPriv;
   imesa->sarea = saPriv;
   imesa->glBuffer = NULL;

   /* Init default driver functions then plug in our I810-specific functions
    * (the texture functions are especially important)
    */
   _mesa_init_driver_functions( &functions );
   i810InitIoctlFuncs( &functions );
   i810InitTextureFuncs( &functions );


   /* Allocate the Mesa context */
   if (sharedContextPrivate)
      shareCtx = ((i810ContextPtr) sharedContextPrivate)->glCtx;
   else
      shareCtx = NULL;
   imesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
                                       &functions, (void*) imesa);
   if (!imesa->glCtx) {
      FREE(imesa);
      return GL_FALSE;
   }

   (void) memset( imesa->texture_heaps, 0, sizeof( imesa->texture_heaps ) );
   make_empty_list( & imesa->swapped );
   
   imesa->nr_heaps = 1;
   imesa->texture_heaps[0] = driCreateTextureHeap( 0, imesa,
	    i810Screen->textureSize,
	    12,
	    I810_NR_TEX_REGIONS,
	    imesa->sarea->texList,
	    (unsigned *) & imesa->sarea->texAge, /* XXX we shouldn't cast! */
	    & imesa->swapped,
	    sizeof( struct i810_texture_object_t ),
	    (destroy_texture_object_t *) i810DestroyTexObj );



   /* Set the maximum texture size small enough that we can guarentee
    * that both texture units can bind a maximal texture and have them
    * in memory at once.
    */



   ctx = imesa->glCtx;
   ctx->Const.MaxTextureUnits = 2;
   ctx->Const.MaxTextureImageUnits = 2;
   ctx->Const.MaxTextureCoordUnits = 2;


   /* FIXME: driCalcualteMaxTextureLevels assumes that mipmaps are tightly
    * FIXME: packed, but they're not in Intel graphics hardware.
    */
   driCalculateMaxTextureLevels( imesa->texture_heaps,
				 imesa->nr_heaps,
				 & ctx->Const,
				 4,
				 11, /* max 2D texture size is 2048x2048 */
				 0,  /* 3D textures unsupported */
				 0,  /* cube textures unsupported. */
				 0,  /* texture rectangles unsupported. */
				 12,
				 GL_FALSE,
				 0 );

   ctx->Const.MinLineWidth = 1.0;
   ctx->Const.MinLineWidthAA = 1.0;
   ctx->Const.MaxLineWidth = 3.0;
   ctx->Const.MaxLineWidthAA = 3.0;
   ctx->Const.LineWidthGranularity = 1.0;

   ctx->Const.MinPointSize = 1.0;
   ctx->Const.MinPointSizeAA = 1.0;
   ctx->Const.MaxPointSize = 3.0;
   ctx->Const.MaxPointSizeAA = 3.0;
   ctx->Const.PointSizeGranularity = 1.0;

   /* reinitialize the context point state.
    * It depend on constants in __GLcontextRec::Const
    */
   _mesa_init_point(ctx);

   ctx->Driver.GetBufferSize = i810BufferSize;
   ctx->Driver.GetString = i810GetString;

   /* Who owns who?
    */
   ctx->DriverCtx = (void *) imesa;
   imesa->glCtx = ctx;