mga_texstate.c

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

/*
 * Copyright 2000-2001 VA Linux Systems, Inc.
 * (c) Copyright IBM Corporation 2002
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Ian Romanick <[e-mail]>
 *    Keith Whitwell <[e-mail]>
 */
/* $XFree86:$ */

#include <stdlib.h>
#include "mm.h"
#include "mgacontext.h"
#include "mgatex.h"
#include "mgaregs.h"
#include "mgatris.h"
#include "mgaioctl.h"

#include "context.h"
#include "enums.h"
#include "macros.h"
#include "imports.h"

#include "simple_list.h"
#include "texformat.h"

#define MGA_USE_TABLE_FOR_FORMAT
#ifdef MGA_USE_TABLE_FOR_FORMAT
#define TMC_nr_tformat (MESA_FORMAT_YCBCR_REV + 1)
static const unsigned TMC_tformat[ TMC_nr_tformat ] =
{
    [MESA_FORMAT_ARGB8888] = TMC_tformat_tw32,
    [MESA_FORMAT_RGB565]   = TMC_tformat_tw16,
    [MESA_FORMAT_ARGB4444] = TMC_tformat_tw12,
    [MESA_FORMAT_ARGB1555] = TMC_tformat_tw15,
    [MESA_FORMAT_AL88]     = TMC_tformat_tw8al,
    [MESA_FORMAT_I8]       = TMC_tformat_tw8a,
    [MESA_FORMAT_CI8]      = TMC_tformat_tw8 ,
    [MESA_FORMAT_YCBCR]     = TMC_tformat_tw422uyvy,
    [MESA_FORMAT_YCBCR_REV] = TMC_tformat_tw422,
};
#endif

static void
mgaSetTexImages( mgaContextPtr mmesa,
		 const struct gl_texture_object * tObj )
{
    mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData;
    struct gl_texture_image *baseImage = tObj->Image[0][ tObj->BaseLevel ];
    GLint totalSize;
    GLint width, height;
    GLint i;
    GLint numLevels;
    GLint log2Width, log2Height;
    GLuint txformat = 0;
    GLint ofs;

    /* Set the hardware texture format
     */
#ifndef MGA_USE_TABLE_FOR_FORMAT
    switch (baseImage->TexFormat->MesaFormat) {

	case MESA_FORMAT_ARGB8888: txformat = TMC_tformat_tw32;	break;
	case MESA_FORMAT_RGB565:   txformat = TMC_tformat_tw16; break;
	case MESA_FORMAT_ARGB4444: txformat = TMC_tformat_tw12;	break;
	case MESA_FORMAT_ARGB1555: txformat = TMC_tformat_tw15; break;
	case MESA_FORMAT_AL88:     txformat = TMC_tformat_tw8al; break;
	case MESA_FORMAT_I8:       txformat = TMC_tformat_tw8a; break;
	case MESA_FORMAT_CI8:      txformat = TMC_tformat_tw8;  break;
        case MESA_FORMAT_YCBCR:    txformat  = TMC_tformat_tw422uyvy; break;
        case MESA_FORMAT_YCBCR_REV: txformat = TMC_tformat_tw422; break;

	default:
	_mesa_problem(NULL, "unexpected texture format in %s", __FUNCTION__);
	return;
    }
#else
    if ( (baseImage->TexFormat->MesaFormat >= TMC_nr_tformat)
	 || (TMC_tformat[ baseImage->TexFormat->MesaFormat ] == 0) )
    {
	_mesa_problem(NULL, "unexpected texture format in %s", __FUNCTION__);
	return;
    }

    txformat = TMC_tformat[ baseImage->TexFormat->MesaFormat ];

#endif /* MGA_USE_TABLE_FOR_FORMAT */

   driCalculateTextureFirstLastLevel( (driTextureObject *) t );
   if (tObj->Target == GL_TEXTURE_RECTANGLE_NV) {
      log2Width = 0;
      log2Height = 0;
   } else {
      log2Width  = tObj->Image[0][t->base.firstLevel]->WidthLog2;
      log2Height = tObj->Image[0][t->base.firstLevel]->HeightLog2;
   }

   width = tObj->Image[0][t->base.firstLevel]->Width;
   height = tObj->Image[0][t->base.firstLevel]->Height;

   numLevels = MIN2( t->base.lastLevel - t->base.firstLevel + 1,
                     MGA_IS_G200(mmesa) ? G200_TEX_MAXLEVELS : G400_TEX_MAXLEVELS);


   totalSize = 0;
   for ( i = 0 ; i < numLevels ; i++ ) {
      const struct gl_texture_image * const texImage = 
	  tObj->Image[0][ i + t->base.firstLevel ];
      int size;

      if (texImage == NULL)
	 break;

      size = texImage->Width * texImage->Height *
         baseImage->TexFormat->TexelBytes;

      t->offsets[i] = totalSize;
      t->base.dirty_images[0] |= (1<<i);

      /* All mipmaps must be 32-byte aligned */
      totalSize += (size + 31) & ~31;

      /* Since G400 calculates the offsets in hardware
       * it can't handle more than one < 32 byte mipmap.
       *
       * Further testing has indicated that it can't
       * handle any < 32 byte mipmaps.
       */
      if (MGA_IS_G400( mmesa ) && size <= 32) {
         i++;
         break;
      }
   }

   /* save these values */
   numLevels = i;
   t->base.lastLevel = t->base.firstLevel + numLevels - 1;
   t->base.totalSize = totalSize;

   /* setup hardware register values */
   t->setup.texctl &= (TMC_tformat_MASK & TMC_tpitch_MASK 
		       & TMC_tpitchext_MASK);
   t->setup.texctl |= txformat;


   /* Set the texture width.  In order to support non-power of 2 textures and
    * textures larger than 1024 texels wide, "linear" pitch must be used.  For
    * the linear pitch, if the width is 2048, a value of zero is used.
    */

   t->setup.texctl |= TMC_tpitchlin_enable;
   t->setup.texctl |= MGA_FIELD( TMC_tpitchext, width & (2048 - 1) );


   /* G400 specifies the number of mip levels in a strange way.  Since there
    * are up to 11 levels, it requires 4 bits.  Three of the bits are at the
    * high end of TEXFILTER.  The other bit is in the middle.  Weird.
    */
   numLevels--;
   t->setup.texfilter &= TF_mapnb_MASK & TF_mapnbhigh_MASK & TF_reserved_MASK;
   t->setup.texfilter |= MGA_FIELD( TF_mapnb, numLevels & 0x7 );
   t->setup.texfilter |= MGA_FIELD( TF_mapnbhigh, (numLevels >> 3) & 0x1 );

   /* warp texture registers */
   ofs = MGA_IS_G200(mmesa) ? 28 : 11;

   t->setup.texwidth = (MGA_FIELD(TW_twmask, width - 1) |
			MGA_FIELD(TW_rfw, (10 - log2Width - 8) & 63 ) |
			MGA_FIELD(TW_tw, (log2Width + ofs ) | 0x40 ));

   t->setup.texheight = (MGA_FIELD(TH_thmask, height - 1) |
			 MGA_FIELD(TH_rfh, (10 - log2Height - 8) & 63 ) |
			 MGA_FIELD(TH_th, (log2Height + ofs ) | 0x40 ));

   mgaUploadTexImages( mmesa, t );
}


/* ================================================================
 * Texture unit state management
 */

static void mgaUpdateTextureEnvG200( GLcontext *ctx, GLuint unit )
{
   mgaContextPtr mmesa = MGA_CONTEXT(ctx);
   struct gl_texture_object *tObj = ctx->Texture.Unit[0]._Current;
   mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData;
   GLenum format = tObj->Image[0][tObj->BaseLevel]->_BaseFormat;

   if (tObj != ctx->Texture.Unit[0].Current2D &&
       tObj != ctx->Texture.Unit[0].CurrentRect)
      return;


   t->setup.texctl &= ~TMC_tmodulate_enable;
   t->setup.texctl2 &= ~(TMC_decalblend_enable |
                         TMC_idecal_enable |
                         TMC_decaldis_enable);

   switch (ctx->Texture.Unit[0].EnvMode) {
   case GL_REPLACE:
      if (format == GL_ALPHA)
         t->setup.texctl2 |= TMC_idecal_enable;

      if (format == GL_RGB || format == GL_LUMINANCE)
         mmesa->hw.alpha_sel = AC_alphasel_diffused;
      else
         mmesa->hw.alpha_sel = AC_alphasel_fromtex;
      break;

   case GL_MODULATE:
      t->setup.texctl |= TMC_tmodulate_enable;

      if (format == GL_ALPHA)
         t->setup.texctl2 |= (TMC_idecal_enable |
                              TMC_decaldis_enable);

      if (format == GL_RGB || format == GL_LUMINANCE)
         mmesa->hw.alpha_sel = AC_alphasel_diffused;
      else
         mmesa->hw.alpha_sel = AC_alphasel_modulated;
      break;

   case GL_DECAL:
      if (format == GL_RGB || format == GL_RGBA)
         t->setup.texctl2 |= TMC_decalblend_enable;
      else
         t->setup.texctl2 |= TMC_idecal_enable;

      mmesa->hw.alpha_sel = AC_alphasel_diffused;
      break;

   case GL_BLEND:
      if (format == GL_ALPHA) {
         t->setup.texctl2 |= TMC_idecal_enable;
         mmesa->hw.alpha_sel = AC_alphasel_modulated;
      } else {
         t->texenv_fallback = GL_TRUE;
      }
      break;

   default:
      break;
   }
}


#define MGA_REPLACE		0
#define MGA_MODULATE		1
#define MGA_DECAL		2
#define MGA_ADD			3
#define MGA_MAX_COMBFUNC	4

static const GLuint g400_color_combine[][MGA_MAX_COMBFUNC] =
{
   /* Unit 0:
    */
   {
      /* GL_REPLACE
       * Cv = Cs
       * Av = Af
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_arg2),
      
      /* GL_MODULATE
       * Cv = Cf Cs
       * Av = Af
       */
      (TD0_color_arg2_diffuse |
       TD0_color_sel_mul |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_arg2),
      
      /* GL_DECAL
       * Cv = Cs
       * Av = Af
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_arg2),
      
      /* GL_ADD
       * Cv = Cf + Cs
       * Av = Af
       */
      (TD0_color_arg2_diffuse |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_arg2),
   },
   
   /* Unit 1:
    */
   {
      /* GL_REPLACE
       * Cv = Cs
       * Av = Ap
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_arg2),
      
      /* GL_MODULATE
       * Cv = Cp Cs
       * Av = Ap
       */
      (TD0_color_arg2_prevstage |
       TD0_color_sel_mul |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_arg2),

      /* GL_DECAL
       * Cv = Cs
       * Av = Ap
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_arg2),
      
      /* GL_ADD
       * Cv = Cp + Cs
       * Av = Ap
       */
      (TD0_color_arg2_prevstage |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_arg2),
   },
};

static const GLuint g400_color_alpha_combine[][MGA_MAX_COMBFUNC] =
{
   /* Unit 0:
    */
   {
      /* GL_REPLACE
       * Cv = Cs
       * Av = As
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_sel_arg1),
      
      /* GL_MODULATE
       * Cv = Cf Cs
       * Av = Af As
       */
      (TD0_color_arg2_diffuse |
       TD0_color_sel_mul |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_mul),
      
      /* GL_DECAL
       * tmp = Cf ( 1 - As )
       * Cv = tmp + Cs As
       * Av = Af
       */
      (TD0_color_arg2_diffuse |
       TD0_color_alpha_currtex |
       TD0_color_alpha1inv_enable |
       TD0_color_arg1mul_alpha1 |
       TD0_color_blend_enable |
       TD0_color_arg1add_mulout |
       TD0_color_arg2add_mulout |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_arg2),

      /* GL_ADD
       * Cv = Cf + Cs
       * Av = Af As
       */
      (TD0_color_arg2_diffuse |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_diffuse |
       TD0_alpha_sel_mul),
   },
   
   /* Unit 1:
    */
   {
      /* GL_REPLACE
       * Cv = Cs
       * Av = As
       */
      (TD0_color_sel_arg1 |
       TD0_alpha_sel_arg1),
      
      /* GL_MODULATE
       * Cv = Cp Cs
       * Av = Ap As
       */
      (TD0_color_arg2_prevstage |
       TD0_color_sel_mul |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_mul),

      /* GL_DECAL
       * tmp = Cp ( 1 - As )
       * Cv = tmp + Cs As
       * Av = Ap
       */
      (TD0_color_arg2_prevstage |
       TD0_color_alpha_currtex |
       TD0_color_alpha1inv_enable |
       TD0_color_arg1mul_alpha1 |
       TD0_color_blend_enable |
       TD0_color_arg1add_mulout |
       TD0_color_arg2add_mulout |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_arg2),
      
      /* GL_ADD
       * Cv = Cp + Cs
       * Av = Ap As
       */
      (TD0_color_arg2_prevstage |
       TD0_color_add_add |
       TD0_color_sel_add |
       TD0_alpha_arg2_prevstage |
       TD0_alpha_sel_mul),
   },
};

static const GLuint g400_alpha_combine[][MGA_MAX_COMBFUNC] =