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https://github.com/dborth/vbagx.git
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477 lines
12 KiB
C++
477 lines
12 KiB
C++
// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
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// Copyright (C) 1999-2003 Forgotten
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// Copyright (C) 2004 Forgotten and the VBA development team
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2, or(at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation,
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// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "agb/GBA.h"
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#include "Globals.h"
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#include "agb/GBAGfx.h"
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void mode1RenderLine()
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{
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u16 *palette = (u16 *)paletteRAM;
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if(DISPCNT & 0x80) {
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for(int x = 0; x < 240; x++) {
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lineMix[x] = 0x7fff;
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}
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gfxLastVCOUNT = VCOUNT;
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return;
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}
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if(layerEnable & 0x0100) {
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gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
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}
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if(layerEnable & 0x0200) {
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gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
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}
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if(layerEnable & 0x0400) {
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int changed = gfxBG2Changed;
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if(gfxLastVCOUNT > VCOUNT)
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changed = 3;
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gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
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BG2PA, BG2PB, BG2PC, BG2PD,
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gfxBG2X, gfxBG2Y, changed, line2);
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}
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gfxDrawSprites(lineOBJ);
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u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
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for(int x = 0; x < 240; x++) {
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u32 color = backdrop;
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u8 top = 0x20;
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if(line0[x] < color) {
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color = line0[x];
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top = 0x01;
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}
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if((u8)(line1[x]>>24) < (u8)(color >> 24)) {
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color = line1[x];
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top = 0x02;
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}
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if((u8)(line2[x]>>24) < (u8)(color >> 24)) {
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color = line2[x];
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top = 0x04;
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}
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if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24)) {
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color = lineOBJ[x];
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top = 0x10;
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}
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if((top & 0x10) && (color & 0x00010000)) {
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// semi-transparent OBJ
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u32 back = backdrop;
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u8 top2 = 0x20;
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if((u8)(line0[x]>>24) < (u8)(back >> 24)) {
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back = line0[x];
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top2 = 0x01;
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}
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if((u8)(line1[x]>>24) < (u8)(back >> 24)) {
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back = line1[x];
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top2 = 0x02;
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}
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if((u8)(line2[x]>>24) < (u8)(back >> 24)) {
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back = line2[x];
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top2 = 0x04;
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}
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if(top2 & (BLDMOD>>8))
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color = gfxAlphaBlend(color, back,
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coeff[COLEV & 0x1F],
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coeff[(COLEV >> 8) & 0x1F]);
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else {
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switch((BLDMOD >> 6) & 3) {
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case 2:
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if(BLDMOD & top)
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color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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case 3:
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if(BLDMOD & top)
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color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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}
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}
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}
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lineMix[x] = color;
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}
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gfxBG2Changed = 0;
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gfxLastVCOUNT = VCOUNT;
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}
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void mode1RenderLineNoWindow()
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{
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u16 *palette = (u16 *)paletteRAM;
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if(DISPCNT & 0x80) {
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for(int x = 0; x < 240; x++) {
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lineMix[x] = 0x7fff;
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}
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gfxLastVCOUNT = VCOUNT;
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return;
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}
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if(layerEnable & 0x0100) {
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gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
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}
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if(layerEnable & 0x0200) {
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gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
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}
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if(layerEnable & 0x0400) {
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int changed = gfxBG2Changed;
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if(gfxLastVCOUNT > VCOUNT)
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changed = 3;
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gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
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BG2PA, BG2PB, BG2PC, BG2PD,
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gfxBG2X, gfxBG2Y, changed, line2);
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}
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gfxDrawSprites(lineOBJ);
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u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
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for(int x = 0; x < 240; x++) {
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u32 color = backdrop;
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u8 top = 0x20;
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if(line0[x] < color) {
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color = line0[x];
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top = 0x01;
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}
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if((u8)(line1[x]>>24) < (u8)(color >> 24)) {
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color = line1[x];
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top = 0x02;
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}
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if((u8)(line2[x]>>24) < (u8)(color >> 24)) {
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color = line2[x];
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top = 0x04;
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}
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if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24)) {
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color = lineOBJ[x];
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top = 0x10;
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}
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if(!(color & 0x00010000)) {
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switch((BLDMOD >> 6) & 3) {
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case 0:
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break;
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case 1:
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{
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if(top & BLDMOD) {
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u32 back = backdrop;
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u8 top2 = 0x20;
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if((u8)(line0[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x01) {
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back = line0[x];
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top2 = 0x01;
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}
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}
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if((u8)(line1[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x02) {
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back = line1[x];
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top2 = 0x02;
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}
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}
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if((u8)(line2[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x04) {
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back = line2[x];
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top2 = 0x04;
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}
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}
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if((u8)(lineOBJ[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x10) {
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back = lineOBJ[x];
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top2 = 0x10;
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}
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}
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if(top2 & (BLDMOD>>8))
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color = gfxAlphaBlend(color, back,
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coeff[COLEV & 0x1F],
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coeff[(COLEV >> 8) & 0x1F]);
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}
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}
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break;
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case 2:
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if(BLDMOD & top)
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color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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case 3:
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if(BLDMOD & top)
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color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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}
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} else {
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// semi-transparent OBJ
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u32 back = backdrop;
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u8 top2 = 0x20;
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if((u8)(line0[x]>>24) < (u8)(back >> 24)) {
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back = line0[x];
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top2 = 0x01;
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}
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if((u8)(line1[x]>>24) < (u8)(back >> 24)) {
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back = line1[x];
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top2 = 0x02;
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}
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if((u8)(line2[x]>>24) < (u8)(back >> 24)) {
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back = line2[x];
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top2 = 0x04;
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}
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if(top2 & (BLDMOD>>8))
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color = gfxAlphaBlend(color, back,
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coeff[COLEV & 0x1F],
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coeff[(COLEV >> 8) & 0x1F]);
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else {
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switch((BLDMOD >> 6) & 3) {
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case 2:
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if(BLDMOD & top)
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color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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case 3:
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if(BLDMOD & top)
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color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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}
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}
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}
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lineMix[x] = color;
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}
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gfxBG2Changed = 0;
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gfxLastVCOUNT = VCOUNT;
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}
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void mode1RenderLineAll()
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{
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u16 *palette = (u16 *)paletteRAM;
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if(DISPCNT & 0x80) {
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for(int x = 0; x < 240; x++) {
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lineMix[x] = 0x7fff;
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}
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gfxLastVCOUNT = VCOUNT;
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return;
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}
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bool inWindow0 = false;
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bool inWindow1 = false;
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if(layerEnable & 0x2000) {
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u8 v0 = WIN0V >> 8;
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u8 v1 = WIN0V & 255;
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inWindow0 = ((v0 == v1) && (v0 >= 0xe8));
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if(v1 >= v0)
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inWindow0 |= (VCOUNT >= v0 && VCOUNT < v1);
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else
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inWindow0 |= (VCOUNT >= v0 || VCOUNT < v1);
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}
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if(layerEnable & 0x4000) {
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u8 v0 = WIN1V >> 8;
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u8 v1 = WIN1V & 255;
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inWindow1 = ((v0 == v1) && (v0 >= 0xe8));
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if(v1 >= v0)
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inWindow1 |= (VCOUNT >= v0 && VCOUNT < v1);
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else
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inWindow1 |= (VCOUNT >= v0 || VCOUNT < v1);
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}
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if(layerEnable & 0x0100) {
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gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
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}
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if(layerEnable & 0x0200) {
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gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
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}
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if(layerEnable & 0x0400) {
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int changed = gfxBG2Changed;
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if(gfxLastVCOUNT > VCOUNT)
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changed = 3;
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gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
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BG2PA, BG2PB, BG2PC, BG2PD,
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gfxBG2X, gfxBG2Y, changed, line2);
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}
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gfxDrawSprites(lineOBJ);
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gfxDrawOBJWin(lineOBJWin);
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u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
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u8 inWin0Mask = WININ & 0xFF;
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u8 inWin1Mask = WININ >> 8;
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u8 outMask = WINOUT & 0xFF;
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for(int x = 0; x < 240; x++) {
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u32 color = backdrop;
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u8 top = 0x20;
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u8 mask = outMask;
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if(!(lineOBJWin[x] & 0x80000000)) {
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mask = WINOUT >> 8;
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}
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if(inWindow1) {
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if(gfxInWin1[x])
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mask = inWin1Mask;
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}
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if(inWindow0) {
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if(gfxInWin0[x]) {
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mask = inWin0Mask;
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}
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}
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if(line0[x] < color && (mask & 1)) {
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color = line0[x];
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top = 0x01;
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}
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if((u8)(line1[x]>>24) < (u8)(color >> 24) && (mask & 2)) {
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color = line1[x];
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top = 0x02;
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}
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if((u8)(line2[x]>>24) < (u8)(color >> 24) && (mask & 4)) {
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color = line2[x];
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top = 0x04;
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}
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if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24) && (mask & 16)) {
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color = lineOBJ[x];
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top = 0x10;
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}
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if(color & 0x00010000) {
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// semi-transparent OBJ
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u32 back = backdrop;
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u8 top2 = 0x20;
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if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24)) {
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back = line0[x];
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top2 = 0x01;
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}
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if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24)) {
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back = line1[x];
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top2 = 0x02;
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}
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if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24)) {
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back = line2[x];
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top2 = 0x04;
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}
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if(top2 & (BLDMOD>>8))
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color = gfxAlphaBlend(color, back,
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coeff[COLEV & 0x1F],
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coeff[(COLEV >> 8) & 0x1F]);
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else {
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switch((BLDMOD >> 6) & 3) {
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case 2:
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if(BLDMOD & top)
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color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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case 3:
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if(BLDMOD & top)
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color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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}
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}
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} else if(mask & 32) {
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// special FX on the window
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switch((BLDMOD >> 6) & 3) {
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case 0:
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break;
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case 1:
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{
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if(top & BLDMOD) {
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u32 back = backdrop;
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u8 top2 = 0x20;
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if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x01) {
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back = line0[x];
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top2 = 0x01;
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}
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}
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if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x02) {
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back = line1[x];
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top2 = 0x02;
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}
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}
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if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x04) {
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back = line2[x];
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top2 = 0x04;
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}
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}
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if((mask & 16) && (u8)(lineOBJ[x]>>24) < (u8)(back >> 24)) {
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if(top != 0x10) {
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back = lineOBJ[x];
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top2 = 0x10;
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}
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}
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if(top2 & (BLDMOD>>8))
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color = gfxAlphaBlend(color, back,
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coeff[COLEV & 0x1F],
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coeff[(COLEV >> 8) & 0x1F]);
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}
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}
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break;
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case 2:
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if(BLDMOD & top)
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color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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case 3:
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if(BLDMOD & top)
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color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
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break;
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}
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}
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lineMix[x] = color;
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}
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gfxBG2Changed = 0;
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gfxLastVCOUNT = VCOUNT;
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}
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