void gsKit_set_clamp(GSGLOBAL *gsGlobal, u8 Preset)
{
u64 *p_data;
u64 *p_store;
if(Preset == GS_CMODE_REPEAT)
{
gsGlobal->Clamp->WMS = GS_CMODE_REPEAT;
gsGlobal->Clamp->WMT = GS_CMODE_REPEAT;
}
else if(Preset == GS_CMODE_CLAMP)
{
gsGlobal->Clamp->WMS = GS_CMODE_CLAMP;
gsGlobal->Clamp->WMT = GS_CMODE_CLAMP;
}
else if(Preset == GS_CMODE_REGION_CLAMP)
{
gsGlobal->Clamp->WMS = GS_CMODE_REGION_CLAMP;
gsGlobal->Clamp->WMT = GS_CMODE_REGION_CLAMP;
}
else if(Preset == GS_CMODE_REGION_REPEAT)
{
gsGlobal->Clamp->WMS = GS_CMODE_REGION_REPEAT;
gsGlobal->Clamp->WMT = GS_CMODE_REGION_REPEAT;
}
p_data = p_store = gsKit_heap_alloc(gsGlobal, 1, 16, GIF_AD);
*p_data++ = GIF_TAG_AD(1);
*p_data++ = GIF_AD;
*p_data++ = GS_SETREG_CLAMP(gsGlobal->Clamp->WMS, gsGlobal->Clamp->WMT,
gsGlobal->Clamp->MINU, gsGlobal->Clamp->MAXU,
gsGlobal->Clamp->MINV, gsGlobal->Clamp->MAXV);
*p_data++ = GS_CLAMP_1+gsGlobal->PrimContext;
}
void gsKit_init_screen(GSGLOBAL *gsGlobal)
{
u64 *p_data;
u64 *p_store;
int size = 18;
if((gsGlobal->Dithering == GS_SETTING_ON) &&
((gsGlobal->PSM == GS_PSM_CT16) || (gsGlobal->PSM == GS_PSM_CT16S)))
size = 19;
gsKit_set_buffer_attributes(gsGlobal);
#ifdef DEBUG
printf("Screen Mode:\n");
printf("------------\n");
printf("Width : %d\n", gsGlobal->Width);
printf("Height: %d\n", gsGlobal->Height);
printf("StartX: %d\n", gsGlobal->StartX);
printf("StartY: %d\n", gsGlobal->StartY);
printf("MagH : %d\n", gsGlobal->MagH);
printf("MagV : %d\n", gsGlobal->MagV);
printf("DW : %d\n", gsGlobal->DW);
printf("DH : %d\n", gsGlobal->DH);
#endif
GS_RESET();
__asm__("sync.p; nop;");
*GS_CSR = 0x00000000; // Clean CSR registers
GsPutIMR(0x0000F700); // Unmasks all of the GS interrupts
SetGsCrt(gsGlobal->Interlace, gsGlobal->Mode, gsGlobal->Field);
gsGlobal->FirstFrame = GS_SETTING_ON;
if(gsGlobal->ZBuffering == GS_SETTING_OFF)
{
gsGlobal->Test->ZTE = GS_SETTING_ON;
gsGlobal->Test->ZTST = 1;
}
DIntr(); // disable interrupts
GS_SET_PMODE( 0, // Read Circuit 1
1, // Read Circuit 2
0, // Use ALP Register for Alpha Blending
1, // Alpha Value of Read Circuit 2 for Output Selection
0, // Blend Alpha with output of Read Circuit 2
0x80); // Alpha Value = 1.0
GS_SET_DISPFB1( 0, // Frame Buffer Base Pointer (Address/2048)
gsGlobal->Width / 64, // Buffer Width (Address/64)
gsGlobal->PSM, // Pixel Storage Format
0, // Upper Left X in Buffer
0);
GS_SET_DISPFB2( 0, // Frame Buffer Base Pointer (Address/2048)
gsGlobal->Width / 64, // Buffer Width (Address/64)
gsGlobal->PSM, // Pixel Storage Format
0, // Upper Left X in Buffer
0); // Upper Left Y in Buffer
GS_SET_DISPLAY1(gsGlobal->StartX, // X position in the display area (in VCK unit
gsGlobal->StartY, // Y position in the display area (in Raster u
gsGlobal->MagH, // Horizontal Magnification
gsGlobal->MagV, // Vertical Magnification
gsGlobal->DW - 1, // Display area width
gsGlobal->DH - 1); // Display area height
GS_SET_DISPLAY2(gsGlobal->StartX, // X position in the display area (in VCK units)
gsGlobal->StartY, // Y position in the display area (in Raster units)
gsGlobal->MagH, // Horizontal Magnification
gsGlobal->MagV, // Vertical Magnification
gsGlobal->DW - 1, // Display area width
gsGlobal->DH - 1); // Display area height
GS_SET_BGCOLOR( gsGlobal->BGColor->Red, // Red
gsGlobal->BGColor->Green, // Green
gsGlobal->BGColor->Blue); // Blue
EIntr(); //enable interrupts
gsGlobal->CurrentPointer = 0; // reset vram pointer too
// Context 1
gsGlobal->ScreenBuffer[0] = gsKit_vram_alloc( gsGlobal, gsKit_texture_size(gsGlobal->Width, gsGlobal->Height, gsGlobal->PSM), GSKIT_ALLOC_SYSBUFFER );
if(gsGlobal->DoubleBuffering == GS_SETTING_OFF)
{
gsGlobal->ScreenBuffer[1] = gsGlobal->ScreenBuffer[0];
}
else
// Context 2
gsGlobal->ScreenBuffer[1] = gsKit_vram_alloc( gsGlobal, gsKit_texture_size(gsGlobal->Width, gsGlobal->Height, gsGlobal->PSM), GSKIT_ALLOC_SYSBUFFER );
if(gsGlobal->ZBuffering == GS_SETTING_ON)
gsGlobal->ZBuffer = gsKit_vram_alloc( gsGlobal, gsKit_texture_size(gsGlobal->Width, gsGlobal->Height, gsGlobal->PSMZ), GSKIT_ALLOC_SYSBUFFER ); // Z Buffer
gsGlobal->TexturePointer = gsGlobal->CurrentPointer; // first useable address for textures
p_data = p_store = (u64 *)gsGlobal->dma_misc;
*p_data++ = GIF_TAG( size - 1, 1, 0, 0, 0, 1 );
*p_data++ = GIF_AD;
*p_data++ = 1;
*p_data++ = GS_PRMODECONT;
*p_data++ = GS_SETREG_FRAME_1( gsGlobal->ScreenBuffer[0], gsGlobal->Width / 64, gsGlobal->PSM, 0 );
*p_data++ = GS_FRAME_1;
*p_data++ = GS_SETREG_XYOFFSET_1( gsGlobal->OffsetX,
gsGlobal->OffsetY);
*p_data++ = GS_XYOFFSET_1;
*p_data++ = GS_SETREG_SCISSOR_1( 0, gsGlobal->Width - 1, 0, gsGlobal->Height - 1 );
*p_data++ = GS_SCISSOR_1;
*p_data++ = GS_SETREG_TEST( gsGlobal->Test->ATE, gsGlobal->Test->ATST,
gsGlobal->Test->AREF, gsGlobal->Test->AFAIL,
gsGlobal->Test->DATE, gsGlobal->Test->DATM,
gsGlobal->Test->ZTE, gsGlobal->Test->ZTST );
*p_data++ = GS_TEST_1;
*p_data++ = GS_SETREG_CLAMP(gsGlobal->Clamp->WMS, gsGlobal->Clamp->WMT,
gsGlobal->Clamp->MINU, gsGlobal->Clamp->MAXU,
gsGlobal->Clamp->MINV, gsGlobal->Clamp->MAXV);
*p_data++ = GS_CLAMP_1;
if(gsGlobal->ZBuffering == GS_SETTING_ON)
{
if((gsGlobal->PSM == GS_PSM_CT16) && (gsGlobal->PSMZ != GS_PSMZ_16))
gsGlobal->PSMZ = GS_PSMZ_16; // seems only non-S 16-bit z depth works with this mode
if((gsGlobal->PSM != GS_PSM_CT16) && (gsGlobal->PSMZ == GS_PSMZ_16))
gsGlobal->PSMZ = GS_PSMZ_16S; // other depths don't seem to work with 16-bit non-S z depth
*p_data++ = GS_SETREG_ZBUF_1( gsGlobal->ZBuffer / 8192, gsGlobal->PSMZ, 0 );
*p_data++ = GS_ZBUF_1;
}
if(gsGlobal->ZBuffering == GS_SETTING_OFF)
{
*p_data++ = GS_SETREG_ZBUF_1( NULL, gsGlobal->PSM, 1 );
*p_data++ = GS_ZBUF_1;
}
*p_data++ = GS_SETREG_COLCLAMP( 255 );
*p_data++ = GS_COLCLAMP;
*p_data++ = GS_SETREG_FRAME_1( gsGlobal->ScreenBuffer[1], gsGlobal->Width / 64, gsGlobal->PSM, 0 );
*p_data++ = GS_FRAME_2;
*p_data++ = GS_SETREG_XYOFFSET_1( gsGlobal->OffsetX,
gsGlobal->OffsetY);
*p_data++ = GS_XYOFFSET_2;
*p_data++ = GS_SETREG_SCISSOR_1( 0, gsGlobal->Width - 1, 0, gsGlobal->Height - 1);
*p_data++ = GS_SCISSOR_2;
*p_data++ = GS_SETREG_TEST( gsGlobal->Test->ATE, gsGlobal->Test->ATST,
gsGlobal->Test->AREF, gsGlobal->Test->AFAIL,
gsGlobal->Test->DATE, gsGlobal->Test->DATM,
gsGlobal->Test->ZTE, gsGlobal->Test->ZTST );
*p_data++ = GS_TEST_2;
*p_data++ = GS_SETREG_CLAMP(gsGlobal->Clamp->WMS, gsGlobal->Clamp->WMT,
gsGlobal->Clamp->MINU, gsGlobal->Clamp->MAXU,
gsGlobal->Clamp->MINV, gsGlobal->Clamp->MAXV);
*p_data++ = GS_CLAMP_2;
if(gsGlobal->ZBuffering == GS_SETTING_ON)
{
*p_data++ = GS_SETREG_ZBUF_1( gsGlobal->ZBuffer / 8192, gsGlobal->PSMZ, 0 );
*p_data++ = GS_ZBUF_2;
}
if(gsGlobal->ZBuffering == GS_SETTING_OFF)
{
*p_data++ = GS_SETREG_ZBUF_1( NULL, gsGlobal->PSM, 1 );
*p_data++ = GS_ZBUF_2;
}
*p_data++ = GS_BLEND_BACK2FRONT;
*p_data++ = GS_ALPHA_1;
*p_data++ = GS_BLEND_BACK2FRONT;
*p_data++ = GS_ALPHA_2;
*p_data++ = GS_SETREG_DIMX(gsGlobal->DitherMatrix[0],gsGlobal->DitherMatrix[1],
gsGlobal->DitherMatrix[2],gsGlobal->DitherMatrix[3],gsGlobal->DitherMatrix[4],
gsGlobal->DitherMatrix[5],gsGlobal->DitherMatrix[6],gsGlobal->DitherMatrix[7],
gsGlobal->DitherMatrix[8],gsGlobal->DitherMatrix[9],gsGlobal->DitherMatrix[10],
gsGlobal->DitherMatrix[11],gsGlobal->DitherMatrix[12],gsGlobal->DitherMatrix[13],
gsGlobal->DitherMatrix[14],gsGlobal->DitherMatrix[15]); // 4x4 dither matrix
*p_data++ = GS_DIMX;
if((gsGlobal->Dithering == GS_SETTING_ON) && ((gsGlobal->PSM == GS_PSM_CT16) || (gsGlobal->PSM == GS_PSM_CT16S))) {
*p_data++ = 1;
*p_data++ = GS_DTHE;
}
dmaKit_send_ucab(DMA_CHANNEL_GIF, p_store, size);
dmaKit_wait_fast();
// do a single frame here to get rid whatever needs to be done during the first frame
gsKit_clear(gsGlobal, GS_SETREG_RGBAQ(0x00,0x00,0x00,0x00,0x00)); // clear the screen
gsKit_queue_exec(gsGlobal);
gsKit_sync_flip(gsGlobal);
gsKit_queue_reset(gsGlobal->Os_Queue);
}