qword_t *draw_prim_start(qword_t *q, int context, prim_t *prim, color_t *color)
{
// Set the primitive register in packed mode, but don't end the packet
PACK_GIFTAG(q,GIF_SET_TAG(2,0,0,0,GIF_FLG_PACKED,1),GIF_REG_AD);
q++;
PACK_GIFTAG(q,GS_SET_PRIM(prim->type,prim->shading,prim->mapping,prim->fogging,
prim->blending,prim->antialiasing,prim->mapping_type,
context,prim->colorfix),GS_REG_PRIM);
q++;
PACK_GIFTAG(q,color->rgbaq,GIF_REG_RGBAQ);
q++;
// Save the position for the reglist giftag that draw_primitive_end will add
__prim_start = q;
q++;
// Return the current qword pointer
return q;
}
/* data (anything). */
static void* InitCB ( void* apParam, MPEGSequenceInfo* apInfo ) {
int lDataSize = apInfo -> m_Width * apInfo -> m_Height * 4;
char* retVal = ( char* )malloc ( lDataSize );
InitCBParam* lpParam = ( InitCBParam* )apParam;
int lMBW = ( apInfo -> m_Width ) >> 4;
int lMBH = ( apInfo -> m_Height ) >> 4;
int lTBW = ( apInfo -> m_Width + 63 ) >> 6;
int lTW = draw_log2 ( apInfo -> m_Width );
int lTH = draw_log2 ( apInfo -> m_Height );
int lX, lY;
char* lpImg;
QWORD* q;
lpParam -> m_TexAddr >>= 6;
lpParam -> m_pData = lpImg = retVal;
lpParam -> m_pInfo = apInfo;
SyncDCache ( retVal, retVal + lDataSize );
/* This initializes picture transfer packet. */
/* Decoded picture is a sequence of 16x16 pixels */
/* 'subpictures' (macroblocks) and DMA controller */
/* will transfer them all at once using source */
/* chain transfer mode. */
packet_allocate(&lpParam -> m_XFerPck,(10 + 12 * lMBW * lMBH )>>1,0,0);
q = lpParam-> m_XFerPck.data;
DMATAG_CNT(q, 3, 0, 0, 0);
q++;
PACK_GIFTAG(q,GIF_SET_TAG( 2, 0, 0, 0, 0, 1 ),GIF_REG_AD);
q++;
PACK_GIFTAG(q,GS_SET_TRXREG( 16, 16 ), GS_REG_TRXREG);
q++;
PACK_GIFTAG(q,GS_SET_BITBLTBUF( 0, 0, 0, lpParam -> m_TexAddr, lTBW, GS_PSM_32 ), GS_REG_BITBLTBUF);
q++;
for ( lY = 0; lY < apInfo -> m_Height; lY += 16 ) {
for ( lX = 0; lX < apInfo -> m_Width; lX += 16, lpImg += 1024 ) {
DMATAG_CNT(q, 4, 0, 0, 0 );
q++;
PACK_GIFTAG(q,GIF_SET_TAG( 2, 0, 0, 0, 0, 1 ), GIF_REG_AD );
q++;
PACK_GIFTAG(q,GS_SET_TRXPOS( 0, 0, lX, lY, 0 ), GS_REG_TRXPOS );
q++;
PACK_GIFTAG(q,GS_SET_TRXDIR( 0 ), GS_REG_TRXDIR );
q++;
PACK_GIFTAG(q,GIF_SET_TAG( 64, 1, 0, 0, 2, 0),0);
q++;
DMATAG_REF(q, 64, ( unsigned )lpImg, 0, 0, 0);
q++;
} /* end for */
} /* end for */
//DMATAG_END(q,0,0,0,0);
//q++;
lpParam-> m_XFerPck.qwc = q - lpParam-> m_XFerPck.data;
/* This initializes picture drawing packet. Just textrured sprite */
/* that occupies the whole screen (no aspect ratio is taken into */
/* account for simplicity. */
packet_allocate(&lpParam -> m_DrawPck,7,0,0);
q = lpParam -> m_DrawPck.data;
PACK_GIFTAG(q, GIF_SET_TAG( 6, 1, 0, 0, 0, 1 ), GIF_REG_AD );
q++;
PACK_GIFTAG(q, GS_SET_TEX0( lpParam -> m_TexAddr, lTBW, GS_PSM_32, lTW, lTH, 1, 1, 0, 0, 0, 0, 0 ), GS_REG_TEX0_1 );
q++;
PACK_GIFTAG(q, GS_SET_PRIM( 6, 0, 1, 0, 0, 0, 1, 0, 0 ), GS_REG_PRIM );
q++;
PACK_GIFTAG(q, GS_SET_UV( 0, 0 ), GS_REG_UV );
q++;
PACK_GIFTAG(q, GS_SET_XYZ( 0, 0, 0 ), GS_REG_XYZ2 );
q++;
PACK_GIFTAG(q, GS_SET_UV( apInfo -> m_Width << 4, apInfo -> m_Height << 4 ), GS_REG_UV );
q++;
PACK_GIFTAG(q, GS_SET_XYZ( 640 << 4, 512 << 4, 0 ), GS_REG_XYZ2 );
q++;
lpParam -> m_DrawPck.qwc = q - lpParam -> m_DrawPck.data;
return retVal;
} /* end InitCB */