Accelerating TFP for R200 - texture format Voodoo?

[Chris Rankin]

Hi,

Could someone help me translate these texture format constants into something R200-compatible,
please?

R300_EASY_TX_FORMAT(X, Y, Z, W, W8Z8Y8X8)
R300_EASY_TX_FORMAT(X, Y, Z, ONE, W8Z8Y8X8)
R300_EASY_TX_FORMAT(X, Y, Z, ONE, Z5Y6X5)

I am also wondering how best to port the following reference to the "image_override" field, from
the r300SetTexImages() function:

        /* Only need to round to nearest 32 for textures, but the blitter
         * requires 64-byte aligned pitches, and we may/may not need the
         * blitter.   NPOT only!
         */
        if (baseImage->IsCompressed) {
                t->pitch =
                    (tObj->Image[0][t->base.firstLevel]->Width + 63) & ~(63);
        } else if (tObj->Target == GL_TEXTURE_RECTANGLE_NV) {
                unsigned int align = blitWidth - 1;
                t->pitch = ((tObj->Image[0][t->base.firstLevel]->Width *
                             texelBytes) + 63) & ~(63);
                t->size |= R300_TX_SIZE_TXPITCH_EN;
                if (!t->image_override)
                        t->pitch_reg =
                            (((tObj->Image[0][t->base.firstLevel]->Width) +
                              align) & ~align) - 1;
        } else {
                t->pitch =
                    ((tObj->Image[0][t->base.firstLevel]->Width *
                      texelBytes) + 63) & ~(63);
        }

I can see the "heritage" from the R200SetTexImages() function:

   if (baseImage->IsCompressed) 
      t->pp_txpitch = (tObj->Image[0][t->base.firstLevel]->Width + 63) & ~(63);
   else
      t->pp_txpitch = ((tObj->Image[0][t->base.firstLevel]->Width * texelBytes) + 63) & ~(63);
   t->pp_txpitch -= 32;

except that it's too different for me to just take an educated guess.

Thanks,
Chris



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