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- // VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
- // Copyright (C) 1999-2003 Forgotten
- // Copyright (C) 2004 Forgotten and the VBA development team
-
- // This program is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 2, or(at your option)
- // any later version.
- //
- // This program is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with this program; if not, write to the Free Software Foundation,
- // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- #include "GBA.h"
- #include "Globals.h"
- #include "Gfx.h"
-
- void mode0RenderLine()
- {
- u16 *palette = (u16 *)paletteRAM;
-
- if(DISPCNT & 0x80) {
- for(int x = 0; x < 240; x++) {
- lineMix[x] = 0x7fff;
- }
- 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 = (READ16LE(&palette[0]) | 0x30000000);
-
- for(int x = 0; x < 240; x++) {
- u32 color = backdrop;
- u8 top = 0x20;
-
- 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;
-
- if((u8)(line0[x]>>24) < (u8)(back >> 24)) {
- back = line0[x];
- top2 = 0x01;
- }
-
- if((u8)(line1[x]>>24) < (u8)(back >> 24)) {
- back = line1[x];
- top2 = 0x02;
- }
-
- if((u8)(line2[x]>>24) < (u8)(back >> 24)) {
- back = line2[x];
- top2 = 0x04;
- }
-
- if((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;
- }
- }
- }
-
- lineMix[x] = color;
- }
- }
-
- void mode0RenderLineNoWindow()
- {
- u16 *palette = (u16 *)paletteRAM;
-
- if(DISPCNT & 0x80) {
- for(int x = 0; x < 240; x++) {
- lineMix[x] = 0x7fff;
- }
- 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 = (READ16LE(&palette[0]) | 0x30000000);
-
- int effect = (BLDMOD >> 6) & 3;
-
- for(int x = 0; x < 240; x++) {
- u32 color = backdrop;
- u8 top = 0x20;
-
- if(line0[x] < color) {
- color = line0[x];
- top = 0x01;
- }
-
- if(line1[x] < (color & 0xFF000000)) {
- color = line1[x];
- top = 0x02;
- }
-
- if(line2[x] < (color & 0xFF000000)) {
- color = line2[x];
- top = 0x04;
- }
-
- if(line3[x] < (color & 0xFF000000)) {
- color = line3[x];
- top = 0x08;
- }
-
- if(lineOBJ[x] < (color & 0xFF000000)) {
- 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(line0[x] < back) {
- if(top != 0x01) {
- back = line0[x];
- top2 = 0x01;
- }
- }
-
- if(line1[x] < (back & 0xFF000000)) {
- if(top != 0x02) {
- back = line1[x];
- top2 = 0x02;
- }
- }
-
- if(line2[x] < (back & 0xFF000000)) {
- if(top != 0x04) {
- back = line2[x];
- top2 = 0x04;
- }
- }
-
- if(line3[x] < (back & 0xFF000000)) {
- if(top != 0x08) {
- back = line3[x];
- top2 = 0x08;
- }
- }
-
- if(lineOBJ[x] < (back & 0xFF000000)) {
- if(top != 0x10) {
- 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;
-
- if(line0[x] < back) {
- back = line0[x];
- top2 = 0x01;
- }
-
- if(line1[x] < (back & 0xFF000000)) {
- back = line1[x];
- top2 = 0x02;
- }
-
- if(line2[x] < (back & 0xFF000000)) {
- back = line2[x];
- top2 = 0x04;
- }
-
- if(line3[x] < (back & 0xFF000000)) {
- 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) {
- for(int x = 0; x < 240; x++) {
- lineMix[x] = 0x7fff;
- }
- 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 = (READ16LE(&palette[0]) | 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;
- }
-
- // special FX on in the window
- if(mask & 32) {
- if(!(color & 0x00010000)) {
- switch((BLDMOD >> 6) & 3) {
- case 0:
- break;
- case 1:
- {
- if(top & BLDMOD) {
- u32 back = backdrop;
- u8 top2 = 0x20;
- if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24)) {
- if(top != 0x01) {
- back = line0[x];
- top2 = 0x01;
- }
- }
-
- if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24)) {
- if(top != 0x02) {
- back = line1[x];
- top2 = 0x02;
- }
- }
-
- if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24)) {
- if(top != 0x04) {
- back = line2[x];
- top2 = 0x04;
- }
- }
-
- if((mask & 8) && (u8)(line3[x]>>24) < (u8)(back >> 24)) {
- if(top != 0x08) {
- back = line3[x];
- top2 = 0x08;
- }
- }
-
- if((mask & 16) && (u8)(lineOBJ[x]>>24) < (u8)(back >> 24)) {
- if(top != 0x10) {
- 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;
-
- 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(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;
- }
- }
- }
-
- lineMix[x] = color;
- }
- }
-