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vbagx/source/vba/gba/Mode0.cpp
dborth 951b0bcb60 optimizations from dancinninjac
2009-12-14 07:13:07 +00:00

606 lines
14 KiB
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/*
Mode 0 is the tiled graphics mode, with all the layers available.
There is no rotation or scaling in this mode.
It can be either 16 colours (with 16 different palettes) or 256 colors.
There are 1024 tiles available.
These routines only render a single line at a time, because of the way the GBA does events.
*/
#include "GBA.h"
#include "Globals.h"
#include "GBAGfx.h"
void mode0RenderLine()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80) {
int x = 232; //240 - 8
do{
lineMix[x ] =
lineMix[x+1] =
lineMix[x+2] =
lineMix[x+3] =
lineMix[x+4] =
lineMix[x+5] =
lineMix[x+6] =
lineMix[x+7] = 0x7fff;
x-=8;
}while(x>=0);
return;
}
if(layerEnable & 0x0100) {
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if(layerEnable & 0x0200) {
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if(layerEnable & 0x0400) {
gfxDrawTextScreen(BG2CNT, BG2HOFS, BG2VOFS, line2);
}
if(layerEnable & 0x0800) {
gfxDrawTextScreen(BG3CNT, BG3HOFS, BG3VOFS, line3);
}
gfxDrawSprites(lineOBJ);
u32 backdrop;
if(customBackdropColor == -1) {
backdrop = (READ16LE(&palette[0]) | 0x30000000);
} else {
backdrop = ((customBackdropColor & 0x7FFF) | 0x30000000);
}
for(u32 x = 0; x < 240u; ++x) {
u32 color = backdrop;
u8 top = 0x20;
//--DCN
//
// !NON-PORTABLE!!NON-PORTABLE!
//
// This takes advantage of the fact that the Wii has far more registers
// (32 vs 8) than IA-32 based processors processors (Intel, AMD).
// This actually runs SLOWER on those. This code will only show
// improvements on a PowerPC machine! (19.5% improvement: isolated tests)
//*
u8 li1 = (u8)(line1[x]>>24);
u8 li2 = (u8)(line2[x]>>24);
u8 li3 = (u8)(line3[x]>>24);
u8 li4 = (u8)(lineOBJ[x]>>24);
u8 r = (li2 < li1) ? (li2) : (li1);
if(li3 < r) {
r = (li4 < li3) ? (li4) : (li3);
}else if(li4 < r){
r = (li4);
}
if(line0[x] < backdrop) {
color = line0[x];
top = 0x01;
}
if(r < (u8)(color >> 24)) {
if(r == li1){
color = line1[x];
top = 0x02;
}else if(r == li2){
color = line2[x];
top = 0x04;
}else if(r == li3){
color = line3[x];
top = 0x08;
}else if(r == li4){
color = lineOBJ[x];
top = 0x10;
}
}
//Original
/*
if(line0[x] < color) {
color = line0[x];
top = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(color >> 24)) {
color = line1[x];
top = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(color >> 24)) {
color = line2[x];
top = 0x04;
}
if((u8)(line3[x]>>24) < (u8)(color >> 24)) {
color = line3[x];
top = 0x08;
}
if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24)) {
color = lineOBJ[x];
top = 0x10;
}
//*/
if((top & 0x10) && (color & 0x00010000)) {
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
u8 li0 = (u8)(line0[x]>>24);
u8 li1 = (u8)(line1[x]>>24);
u8 li2 = (u8)(line2[x]>>24);
u8 li3 = (u8)(line3[x]>>24);
u8 r = (li1 < li0) ? (li1) : (li0);
if(li2 < r) {
r = (li3 < li2) ? (li3) : (li2);
}else if(li3 < r){
r = (li3);
}
if(r < (u8)(color >> 24)) {
if(r == li0){
back = line0[x];
top2 = 0x01;
}else if(r == li1){
back = line1[x];
top2 = 0x02;
}else if(r == li2){
back = line2[x];
top2 = 0x04;
}else if(r == li3){
back = line3[x];
top2 = 0x08;
}
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else {
switch((BLDMOD >> 6) & 3) {
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
lineMix[x] = color;
}
}
void mode0RenderLineNoWindow()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80) {
int x = 232; //240 - 8
do{
lineMix[x ] =
lineMix[x+1] =
lineMix[x+2] =
lineMix[x+3] =
lineMix[x+4] =
lineMix[x+5] =
lineMix[x+6] =
lineMix[x+7] = 0x7fff;
x-=8;
}while(x>=0);
return;
}
if(layerEnable & 0x0100) {
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if(layerEnable & 0x0200) {
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if(layerEnable & 0x0400) {
gfxDrawTextScreen(BG2CNT, BG2HOFS, BG2VOFS, line2);
}
if(layerEnable & 0x0800) {
gfxDrawTextScreen(BG3CNT, BG3HOFS, BG3VOFS, line3);
}
gfxDrawSprites(lineOBJ);
u32 backdrop;
if(customBackdropColor == -1) {
backdrop = (READ16LE(&palette[0]) | 0x30000000);
} else {
backdrop = ((customBackdropColor & 0x7FFF) | 0x30000000);
}
int effect = (BLDMOD >> 6) & 3;
for(int x = 0; x < 240; x++) {
u32 color = backdrop;
u8 top = 0x20;
u8 li1 = (u8)(line1[x]>>24);
u8 li2 = (u8)(line2[x]>>24);
u8 li3 = (u8)(line3[x]>>24);
u8 li4 = (u8)(lineOBJ[x]>>24);
u8 r = (li2 < li1) ? (li2) : (li1);
if(li3 < r) {
r = (li4 < li3) ? (li4) : (li3);
}else if(li4 < r){
r = (li4);
}
if(line0[x] < backdrop) {
color = line0[x];
top = 0x01;
}
if(r < (u8)(color >> 24)) {
if(r == li1){
color = line1[x];
top = 0x02;
}else if(r == li2){
color = line2[x];
top = 0x04;
}else if(r == li3){
color = line3[x];
top = 0x08;
}else if(r == li4){
color = lineOBJ[x];
top = 0x10;
}
}
if(!(color & 0x00010000)) {
switch(effect) {
case 0:
break;
case 1:
{
if(top & BLDMOD) {
u32 back = backdrop;
u8 top2 = 0x20;
if((top != 0x01) && line0[x] < back) {
back = line0[x];
top2 = 0x01;
}
if((top != 0x02) && line1[x] < (back & 0xFF000000)) {
back = line1[x];
top2 = 0x02;
}
if((top != 0x04) && line2[x] < (back & 0xFF000000)) {
back = line2[x];
top2 = 0x04;
}
if((top != 0x08) && line3[x] < (back & 0xFF000000)) {
back = line3[x];
top2 = 0x08;
}
if((top != 0x10) && lineOBJ[x] < (back & 0xFF000000)) {
back = lineOBJ[x];
top2 = 0x10;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
}
}
break;
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
} else {
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
//--DCN
// This is pretty much the exact same result:
// line1[x] < (back & 0xFF000000)
//
// (u8)(line0[x]>>24) < (u8)(back >> 24)
//
// The only difference is that the first is stored in a u32,
// and the second is stored in a u8
//*
u8 li0 = (u8)(line0[x]>>24);
u8 li1 = (u8)(line1[x]>>24);
u8 li2 = (u8)(line2[x]>>24);
u8 li3 = (u8)(line3[x]>>24);
u8 r = (li1 < li0) ? (li1) : (li0);
if(li2 < r) {
r = (li3 < li2) ? (li3) : (li2);
}else if(li3 < r){
r = (li3);
}
if(r < (u8)(color >> 24)) {
if(r == li0){
back = line0[x];
top2 = 0x01;
}else if(r == li1){
back = line1[x];
top2 = 0x02;
}else if(r == li2){
back = line2[x];
top2 = 0x04;
}else if(r == li3){
back = line3[x];
top2 = 0x08;
}
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else {
switch((BLDMOD >> 6) & 3) {
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
lineMix[x] = color;
}
}
void mode0RenderLineAll()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80) {
int x = 232; //240 - 8
do{
lineMix[x ] =
lineMix[x+1] =
lineMix[x+2] =
lineMix[x+3] =
lineMix[x+4] =
lineMix[x+5] =
lineMix[x+6] =
lineMix[x+7] = 0x7fff;
x-=8;
}while(x>=0);
return;
}
bool inWindow0 = false;
bool inWindow1 = false;
if(layerEnable & 0x2000) {
u8 v0 = WIN0V >> 8;
u8 v1 = WIN0V & 255;
inWindow0 = ((v0 == v1) && (v0 >= 0xe8));
if(v1 >= v0)
inWindow0 |= (VCOUNT >= v0 && VCOUNT < v1);
else
inWindow0 |= (VCOUNT >= v0 || VCOUNT < v1);
}
if(layerEnable & 0x4000) {
u8 v0 = WIN1V >> 8;
u8 v1 = WIN1V & 255;
inWindow1 = ((v0 == v1) && (v0 >= 0xe8));
if(v1 >= v0)
inWindow1 |= (VCOUNT >= v0 && VCOUNT < v1);
else
inWindow1 |= (VCOUNT >= v0 || VCOUNT < v1);
}
if((layerEnable & 0x0100)) {
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if((layerEnable & 0x0200)) {
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if((layerEnable & 0x0400)) {
gfxDrawTextScreen(BG2CNT, BG2HOFS, BG2VOFS, line2);
}
if((layerEnable & 0x0800)) {
gfxDrawTextScreen(BG3CNT, BG3HOFS, BG3VOFS, line3);
}
gfxDrawSprites(lineOBJ);
gfxDrawOBJWin(lineOBJWin);
u32 backdrop;
if(customBackdropColor == -1) {
backdrop = (READ16LE(&palette[0]) | 0x30000000);
} else {
backdrop = ((customBackdropColor & 0x7FFF) | 0x30000000);
}
u8 inWin0Mask = WININ & 0xFF;
u8 inWin1Mask = WININ >> 8;
u8 outMask = WINOUT & 0xFF;
for(int x = 0; x < 240; x++) {
u32 color = backdrop;
u8 top = 0x20;
u8 mask = outMask;
if(!(lineOBJWin[x] & 0x80000000)) {
mask = WINOUT >> 8;
}
if(inWindow1) {
if(gfxInWin1[x])
mask = inWin1Mask;
}
if(inWindow0) {
if(gfxInWin0[x]) {
mask = inWin0Mask;
}
}
if((mask & 1) && (line0[x] < color)) {
color = line0[x];
top = 0x01;
}
if((mask & 2) && ((u8)(line1[x]>>24) < (u8)(color >> 24))) {
color = line1[x];
top = 0x02;
}
if((mask & 4) && ((u8)(line2[x]>>24) < (u8)(color >> 24))) {
color = line2[x];
top = 0x04;
}
if((mask & 8) && ((u8)(line3[x]>>24) < (u8)(color >> 24))) {
color = line3[x];
top = 0x08;
}
if((mask & 16) && ((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))) {
color = lineOBJ[x];
top = 0x10;
}
if(color & 0x00010000) {
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
if((mask & 1) && ((u8)(line0[x]>>24) < (u8)(back >> 24))) {
back = line0[x];
top2 = 0x01;
}
if((mask & 2) && ((u8)(line1[x]>>24) < (u8)(back >> 24))) {
back = line1[x];
top2 = 0x02;
}
if((mask & 4) && ((u8)(line2[x]>>24) < (u8)(back >> 24))) {
back = line2[x];
top2 = 0x04;
}
if((mask & 8) && ((u8)(line3[x]>>24) < (u8)(back >> 24))) {
back = line3[x];
top2 = 0x08;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else {
switch((BLDMOD >> 6) & 3) {
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
} else if(mask & 32) {
// special FX on in the window
switch((BLDMOD >> 6) & 3) {
case 0:
break;
case 1:
{
if(top & BLDMOD) {
u32 back = backdrop;
u8 top2 = 0x20;
if((mask & 1) && (top != 0x01) && (u8)(line0[x]>>24) < (u8)(back >> 24)) {
back = line0[x];
top2 = 0x01;
}
if((mask & 2) && (top != 0x02) && (u8)(line1[x]>>24) < (u8)(back >> 24)) {
back = line1[x];
top2 = 0x02;
}
if((mask & 4) && (top != 0x04) && (u8)(line2[x]>>24) < (u8)(back >> 24)) {
back = line2[x];
top2 = 0x04;
}
if((mask & 8) && (top != 0x08) && (u8)(line3[x]>>24) < (u8)(back >> 24)) {
back = line3[x];
top2 = 0x08;
}
if((mask & 16) && (top != 0x10) && (u8)(lineOBJ[x]>>24) < (u8)(back >> 24)) {
back = lineOBJ[x];
top2 = 0x10;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
}
}
break;
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
lineMix[x] = color;
}
}
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