/* Copyright 2016-2020 Arisotura This file is part of melonDS. melonDS 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 3 of the License, or (at your option) any later version. melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/. */ #include #include #include "NDS.h" #include "GPU.h" // notes on color conversion // // * BLDCNT special effects are applied on 18bit colors // -> layers are converted to 18bit before being composited // -> 'brightness up' effect does: x = x + (63-x)*factor // * colors are converted as follows: 18bit = 15bit * 2 // -> white comes out as 62,62,62 and not 63,63,63 // * VRAM/FIFO display modes convert colors the same way // * 3D engine converts colors differently (18bit = 15bit * 2 + 1, except 0 = 0) // * 'screen disabled' white is 63,63,63 // * [Gericom] bit15 is used as bottom green bit for palettes. TODO: check where this applies. // tested on the normal BG palette and applies there // // oh also, changing DISPCNT bit16-17 midframe doesn't work (ignored? applied for next frame?) // TODO, eventually: check whether other DISPCNT bits can be changed midframe // // for VRAM display mode, VRAM must be mapped to LCDC // // FIFO display mode: // * the 'FIFO' is a circular buffer of 32 bytes (16 pixels) // * the buffer doesn't get empty, the display controller keeps reading from it // -> if it isn't updated, the contents will be repeated every 16 pixels // * the write pointer is incremented when writing to the higher 16 bits of the FIFO register (0x04000068) // * the write pointer is reset upon VBlank // * FIFO DMA (mode 4) is triggered every 8 pixels. start bit is cleared upon VBlank. // // sprite blending rules // * destination must be selected as 2nd target // * sprite must be semitransparent or bitmap sprite // * blending is applied instead of the selected color effect, even if it is 'none'. // * for bitmap sprites: EVA = alpha+1, EVB = 16-EVA // * for bitmap sprites: alpha=0 is always transparent, even if blending doesn't apply // // 3D blending rules // // 3D/3D blending seems to follow these equations: // dstColor = srcColor*srcAlpha + dstColor*(1-srcAlpha) // dstAlpha = max(srcAlpha, dstAlpha) // blending isn't applied if dstAlpha is zero. // // 3D/2D blending rules // * if destination selected as 2nd target: // blending is applied instead of the selected color effect, using full 5bit alpha from 3D layer // this even if the selected color effect is 'none'. // apparently this works even if BG0 isn't selected as 1st target // * if BG0 is selected as 1st target, destination not selected as 2nd target: // brightness up/down effect is applied if selected. if blending is selected, it doesn't apply. // * 3D layer pixels with alpha=0 are always transparent. // // mosaic: // * mosaic grid starts at 0,0 regardless of the BG/sprite position // * when changing it midframe: new X setting is applied immediately, new Y setting is applied only // after the end of the current mosaic row (when Y counter needs reloaded) // * for rotscaled sprites: coordinates that are inside the sprite are clamped to the sprite region // after being transformed for mosaic // TODO: find which parts of DISPCNT are latched. for example, not possible to change video mode midframe. GPU2D::GPU2D(u32 num) { Num = num; // initialize mosaic table for (int m = 0; m < 16; m++) { for (int x = 0; x < 256; x++) { int offset = x % (m+1); MosaicTable[m][x] = offset; } } } GPU2D::~GPU2D() { } void GPU2D::Reset() { DispCnt = 0; memset(BGCnt, 0, 4*2); memset(BGXPos, 0, 4*2); memset(BGYPos, 0, 4*2); memset(BGXRef, 0, 2*4); memset(BGYRef, 0, 2*4); memset(BGXRefInternal, 0, 2*4); memset(BGYRefInternal, 0, 2*4); memset(BGRotA, 0, 2*2); memset(BGRotB, 0, 2*2); memset(BGRotC, 0, 2*2); memset(BGRotD, 0, 2*2); memset(Win0Coords, 0, 4); memset(Win1Coords, 0, 4); memset(WinCnt, 0, 4); Win0Active = 0; Win1Active = 0; BGMosaicSize[0] = 0; BGMosaicSize[1] = 0; OBJMosaicSize[0] = 0; OBJMosaicSize[1] = 0; BGMosaicY = 0; BGMosaicYMax = 0; OBJMosaicY = 0; OBJMosaicYMax = 0; CurBGXMosaicTable = MosaicTable[0]; CurOBJXMosaicTable = MosaicTable[0]; BlendCnt = 0; EVA = 16; EVB = 0; EVY = 0; memset(DispFIFO, 0, 16*2); DispFIFOReadPtr = 0; DispFIFOWritePtr = 0; memset(DispFIFOBuffer, 0, 256*2); CaptureCnt = 0; MasterBrightness = 0; BGExtPalStatus[0] = 0; BGExtPalStatus[1] = 0; BGExtPalStatus[2] = 0; BGExtPalStatus[3] = 0; OBJExtPalStatus = 0; } void GPU2D::DoSavestate(Savestate* file) { file->Section((char*)(Num ? "GP2B" : "GP2A")); file->Var32(&DispCnt); file->VarArray(BGCnt, 4*2); file->VarArray(BGXPos, 4*2); file->VarArray(BGYPos, 4*2); file->VarArray(BGXRef, 2*4); file->VarArray(BGYRef, 2*4); file->VarArray(BGXRefInternal, 2*4); file->VarArray(BGYRefInternal, 2*4); file->VarArray(BGRotA, 2*2); file->VarArray(BGRotB, 2*2); file->VarArray(BGRotC, 2*2); file->VarArray(BGRotD, 2*2); file->VarArray(Win0Coords, 4); file->VarArray(Win1Coords, 4); file->VarArray(WinCnt, 4); file->VarArray(BGMosaicSize, 2); file->VarArray(OBJMosaicSize, 2); file->Var8(&BGMosaicY); file->Var8(&BGMosaicYMax); file->Var8(&OBJMosaicY); file->Var8(&OBJMosaicYMax); file->Var16(&BlendCnt); file->Var16(&BlendAlpha); file->Var8(&EVA); file->Var8(&EVB); file->Var8(&EVY); file->Var16(&MasterBrightness); if (!Num) { file->VarArray(DispFIFO, 16*2); file->Var32(&DispFIFOReadPtr); file->Var32(&DispFIFOWritePtr); file->VarArray(DispFIFOBuffer, 256*2); file->Var32(&CaptureCnt); } if (file->IsAtleastVersion(2, 1)) { file->Var32(&Win0Active); file->Var32(&Win1Active); } else { Win0Active = 0; Win1Active = 0; } if (!file->Saving) { // refresh those BGExtPalStatus[0] = 0; BGExtPalStatus[1] = 0; BGExtPalStatus[2] = 0; BGExtPalStatus[3] = 0; OBJExtPalStatus = 0; CurBGXMosaicTable = MosaicTable[BGMosaicSize[0]]; CurOBJXMosaicTable = MosaicTable[OBJMosaicSize[0]]; } } void GPU2D::SetFramebuffer(u32* buf) { Framebuffer = buf; } void GPU2D::SetDisplaySettings(bool accel) { Accelerated = accel; if (Accelerated) DrawPixel = DrawPixel_Accel; else DrawPixel = DrawPixel_Normal; } u8 GPU2D::Read8(u32 addr) { switch (addr & 0x00000FFF) { case 0x000: return DispCnt & 0xFF; case 0x001: return (DispCnt >> 8) & 0xFF; case 0x002: return (DispCnt >> 16) & 0xFF; case 0x003: return DispCnt >> 24; case 0x008: return BGCnt[0] & 0xFF; case 0x009: return BGCnt[0] >> 8; case 0x00A: return BGCnt[1] & 0xFF; case 0x00B: return BGCnt[1] >> 8; case 0x00C: return BGCnt[2] & 0xFF; case 0x00D: return BGCnt[2] >> 8; case 0x00E: return BGCnt[3] & 0xFF; case 0x00F: return BGCnt[3] >> 8; case 0x048: return WinCnt[0]; case 0x049: return WinCnt[1]; case 0x04A: return WinCnt[2]; case 0x04B: return WinCnt[3]; // there are games accidentally trying to read those // those are write-only case 0x04C: case 0x04D: return 0; } printf("unknown GPU read8 %08X\n", addr); return 0; } u16 GPU2D::Read16(u32 addr) { switch (addr & 0x00000FFF) { case 0x000: return DispCnt & 0xFFFF; case 0x002: return DispCnt >> 16; case 0x008: return BGCnt[0]; case 0x00A: return BGCnt[1]; case 0x00C: return BGCnt[2]; case 0x00E: return BGCnt[3]; case 0x048: return WinCnt[0] | (WinCnt[1] << 8); case 0x04A: return WinCnt[2] | (WinCnt[3] << 8); case 0x050: return BlendCnt; case 0x052: return BlendAlpha; // BLDY is write-only case 0x064: return CaptureCnt & 0xFFFF; case 0x066: return CaptureCnt >> 16; case 0x06C: return MasterBrightness; } printf("unknown GPU read16 %08X\n", addr); return 0; } u32 GPU2D::Read32(u32 addr) { switch (addr & 0x00000FFF) { case 0x000: return DispCnt; case 0x064: return CaptureCnt; } return Read16(addr) | (Read16(addr+2) << 16); } void GPU2D::Write8(u32 addr, u8 val) { if (!Enabled) return; switch (addr & 0x00000FFF) { case 0x000: DispCnt = (DispCnt & 0xFFFFFF00) | val; if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x001: DispCnt = (DispCnt & 0xFFFF00FF) | (val << 8); if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x002: DispCnt = (DispCnt & 0xFF00FFFF) | (val << 16); if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x003: DispCnt = (DispCnt & 0x00FFFFFF) | (val << 24); if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x008: BGCnt[0] = (BGCnt[0] & 0xFF00) | val; return; case 0x009: BGCnt[0] = (BGCnt[0] & 0x00FF) | (val << 8); return; case 0x00A: BGCnt[1] = (BGCnt[1] & 0xFF00) | val; return; case 0x00B: BGCnt[1] = (BGCnt[1] & 0x00FF) | (val << 8); return; case 0x00C: BGCnt[2] = (BGCnt[2] & 0xFF00) | val; return; case 0x00D: BGCnt[2] = (BGCnt[2] & 0x00FF) | (val << 8); return; case 0x00E: BGCnt[3] = (BGCnt[3] & 0xFF00) | val; return; case 0x00F: BGCnt[3] = (BGCnt[3] & 0x00FF) | (val << 8); return; case 0x010: BGXPos[0] = (BGXPos[0] & 0xFF00) | val; return; case 0x011: BGXPos[0] = (BGXPos[0] & 0x00FF) | (val << 8); return; case 0x012: BGYPos[0] = (BGYPos[0] & 0xFF00) | val; return; case 0x013: BGYPos[0] = (BGYPos[0] & 0x00FF) | (val << 8); return; case 0x014: BGXPos[1] = (BGXPos[1] & 0xFF00) | val; return; case 0x015: BGXPos[1] = (BGXPos[1] & 0x00FF) | (val << 8); return; case 0x016: BGYPos[1] = (BGYPos[1] & 0xFF00) | val; return; case 0x017: BGYPos[1] = (BGYPos[1] & 0x00FF) | (val << 8); return; case 0x018: BGXPos[2] = (BGXPos[2] & 0xFF00) | val; return; case 0x019: BGXPos[2] = (BGXPos[2] & 0x00FF) | (val << 8); return; case 0x01A: BGYPos[2] = (BGYPos[2] & 0xFF00) | val; return; case 0x01B: BGYPos[2] = (BGYPos[2] & 0x00FF) | (val << 8); return; case 0x01C: BGXPos[3] = (BGXPos[3] & 0xFF00) | val; return; case 0x01D: BGXPos[3] = (BGXPos[3] & 0x00FF) | (val << 8); return; case 0x01E: BGYPos[3] = (BGYPos[3] & 0xFF00) | val; return; case 0x01F: BGYPos[3] = (BGYPos[3] & 0x00FF) | (val << 8); return; case 0x040: Win0Coords[1] = val; return; case 0x041: Win0Coords[0] = val; return; case 0x042: Win1Coords[1] = val; return; case 0x043: Win1Coords[0] = val; return; case 0x044: Win0Coords[3] = val; return; case 0x045: Win0Coords[2] = val; return; case 0x046: Win1Coords[3] = val; return; case 0x047: Win1Coords[2] = val; return; case 0x048: WinCnt[0] = val; return; case 0x049: WinCnt[1] = val; return; case 0x04A: WinCnt[2] = val; return; case 0x04B: WinCnt[3] = val; return; case 0x04C: BGMosaicSize[0] = val & 0xF; BGMosaicSize[1] = val >> 4; CurBGXMosaicTable = MosaicTable[BGMosaicSize[0]]; return; case 0x04D: OBJMosaicSize[0] = val & 0xF; OBJMosaicSize[1] = val >> 4; CurOBJXMosaicTable = MosaicTable[OBJMosaicSize[0]]; return; case 0x050: BlendCnt = (BlendCnt & 0x3F00) | val; return; case 0x051: BlendCnt = (BlendCnt & 0x00FF) | (val << 8); return; case 0x052: BlendAlpha = (BlendAlpha & 0x1F00) | (val & 0x1F); EVA = val & 0x1F; if (EVA > 16) EVA = 16; return; case 0x053: BlendAlpha = (BlendAlpha & 0x001F) | ((val & 0x1F) << 8); EVB = val & 0x1F; if (EVB > 16) EVB = 16; return; case 0x054: EVY = val & 0x1F; if (EVY > 16) EVY = 16; return; } printf("unknown GPU write8 %08X %02X\n", addr, val); } void GPU2D::Write16(u32 addr, u16 val) { if (!Enabled) return; switch (addr & 0x00000FFF) { case 0x000: DispCnt = (DispCnt & 0xFFFF0000) | val; if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x002: DispCnt = (DispCnt & 0x0000FFFF) | (val << 16); if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x008: BGCnt[0] = val; return; case 0x00A: BGCnt[1] = val; return; case 0x00C: BGCnt[2] = val; return; case 0x00E: BGCnt[3] = val; return; case 0x010: BGXPos[0] = val; return; case 0x012: BGYPos[0] = val; return; case 0x014: BGXPos[1] = val; return; case 0x016: BGYPos[1] = val; return; case 0x018: BGXPos[2] = val; return; case 0x01A: BGYPos[2] = val; return; case 0x01C: BGXPos[3] = val; return; case 0x01E: BGYPos[3] = val; return; case 0x020: BGRotA[0] = val; return; case 0x022: BGRotB[0] = val; return; case 0x024: BGRotC[0] = val; return; case 0x026: BGRotD[0] = val; return; case 0x028: BGXRef[0] = (BGXRef[0] & 0xFFFF0000) | val; if (GPU::VCount < 192) BGXRefInternal[0] = BGXRef[0]; return; case 0x02A: if (val & 0x0800) val |= 0xF000; BGXRef[0] = (BGXRef[0] & 0xFFFF) | (val << 16); if (GPU::VCount < 192) BGXRefInternal[0] = BGXRef[0]; return; case 0x02C: BGYRef[0] = (BGYRef[0] & 0xFFFF0000) | val; if (GPU::VCount < 192) BGYRefInternal[0] = BGYRef[0]; return; case 0x02E: if (val & 0x0800) val |= 0xF000; BGYRef[0] = (BGYRef[0] & 0xFFFF) | (val << 16); if (GPU::VCount < 192) BGYRefInternal[0] = BGYRef[0]; return; case 0x030: BGRotA[1] = val; return; case 0x032: BGRotB[1] = val; return; case 0x034: BGRotC[1] = val; return; case 0x036: BGRotD[1] = val; return; case 0x038: BGXRef[1] = (BGXRef[1] & 0xFFFF0000) | val; if (GPU::VCount < 192) BGXRefInternal[1] = BGXRef[1]; return; case 0x03A: if (val & 0x0800) val |= 0xF000; BGXRef[1] = (BGXRef[1] & 0xFFFF) | (val << 16); if (GPU::VCount < 192) BGXRefInternal[1] = BGXRef[1]; return; case 0x03C: BGYRef[1] = (BGYRef[1] & 0xFFFF0000) | val; if (GPU::VCount < 192) BGYRefInternal[1] = BGYRef[1]; return; case 0x03E: if (val & 0x0800) val |= 0xF000; BGYRef[1] = (BGYRef[1] & 0xFFFF) | (val << 16); if (GPU::VCount < 192) BGYRefInternal[1] = BGYRef[1]; return; case 0x040: Win0Coords[1] = val & 0xFF; Win0Coords[0] = val >> 8; return; case 0x042: Win1Coords[1] = val & 0xFF; Win1Coords[0] = val >> 8; return; case 0x044: Win0Coords[3] = val & 0xFF; Win0Coords[2] = val >> 8; return; case 0x046: Win1Coords[3] = val & 0xFF; Win1Coords[2] = val >> 8; return; case 0x048: WinCnt[0] = val & 0xFF; WinCnt[1] = val >> 8; return; case 0x04A: WinCnt[2] = val & 0xFF; WinCnt[3] = val >> 8; return; case 0x04C: BGMosaicSize[0] = val & 0xF; BGMosaicSize[1] = (val >> 4) & 0xF; CurBGXMosaicTable = MosaicTable[BGMosaicSize[0]]; OBJMosaicSize[0] = (val >> 8) & 0xF; OBJMosaicSize[1] = val >> 12; CurOBJXMosaicTable = MosaicTable[OBJMosaicSize[0]]; return; case 0x050: BlendCnt = val & 0x3FFF; return; case 0x052: BlendAlpha = val & 0x1F1F; EVA = val & 0x1F; if (EVA > 16) EVA = 16; EVB = (val >> 8) & 0x1F; if (EVB > 16) EVB = 16; return; case 0x054: EVY = val & 0x1F; if (EVY > 16) EVY = 16; return; case 0x068: DispFIFO[DispFIFOWritePtr] = val; return; case 0x06A: DispFIFO[DispFIFOWritePtr+1] = val; DispFIFOWritePtr += 2; DispFIFOWritePtr &= 0xF; return; case 0x06C: MasterBrightness = val; return; } //printf("unknown GPU write16 %08X %04X\n", addr, val); } void GPU2D::Write32(u32 addr, u32 val) { if (!Enabled) return; switch (addr & 0x00000FFF) { case 0x000: DispCnt = val; if (Num) DispCnt &= 0xC0B1FFF7; return; case 0x028: if (val & 0x08000000) val |= 0xF0000000; BGXRef[0] = val; if (GPU::VCount < 192) BGXRefInternal[0] = BGXRef[0]; return; case 0x02C: if (val & 0x08000000) val |= 0xF0000000; BGYRef[0] = val; if (GPU::VCount < 192) BGYRefInternal[0] = BGYRef[0]; return; case 0x038: if (val & 0x08000000) val |= 0xF0000000; BGXRef[1] = val; if (GPU::VCount < 192) BGXRefInternal[1] = BGXRef[1]; return; case 0x03C: if (val & 0x08000000) val |= 0xF0000000; BGYRef[1] = val; if (GPU::VCount < 192) BGYRefInternal[1] = BGYRef[1]; return; case 0x064: // TODO: check what happens when writing to it during display // esp. if a capture is happening CaptureCnt = val & 0xEF3F1F1F; return; case 0x068: DispFIFO[DispFIFOWritePtr] = val & 0xFFFF; DispFIFO[DispFIFOWritePtr+1] = val >> 16; DispFIFOWritePtr += 2; DispFIFOWritePtr &= 0xF; return; } Write16(addr, val&0xFFFF); Write16(addr+2, val>>16); } u32 GPU2D::ColorBlend4(u32 val1, u32 val2, u32 eva, u32 evb) { u32 r = (((val1 & 0x00003F) * eva) + ((val2 & 0x00003F) * evb)) >> 4; u32 g = ((((val1 & 0x003F00) * eva) + ((val2 & 0x003F00) * evb)) >> 4) & 0x007F00; u32 b = ((((val1 & 0x3F0000) * eva) + ((val2 & 0x3F0000) * evb)) >> 4) & 0x7F0000; if (r > 0x00003F) r = 0x00003F; if (g > 0x003F00) g = 0x003F00; if (b > 0x3F0000) b = 0x3F0000; return r | g | b | 0xFF000000; } u32 GPU2D::ColorBlend5(u32 val1, u32 val2) { u32 eva = ((val1 >> 24) & 0x1F) + 1; u32 evb = 32 - eva; if (eva == 32) return val1; u32 r = (((val1 & 0x00003F) * eva) + ((val2 & 0x00003F) * evb)) >> 5; u32 g = ((((val1 & 0x003F00) * eva) + ((val2 & 0x003F00) * evb)) >> 5) & 0x007F00; u32 b = ((((val1 & 0x3F0000) * eva) + ((val2 & 0x3F0000) * evb)) >> 5) & 0x7F0000; if (eva <= 16) { r += 0x000001; g += 0x000100; b += 0x010000; } if (r > 0x00003F) r = 0x00003F; if (g > 0x003F00) g = 0x003F00; if (b > 0x3F0000) b = 0x3F0000; return r | g | b | 0xFF000000; } u32 GPU2D::ColorBrightnessUp(u32 val, u32 factor) { u32 rb = val & 0x3F003F; u32 g = val & 0x003F00; rb += ((((0x3F003F - rb) * factor) >> 4) & 0x3F003F); g += ((((0x003F00 - g) * factor) >> 4) & 0x003F00); return rb | g | 0xFF000000; } u32 GPU2D::ColorBrightnessDown(u32 val, u32 factor) { u32 rb = val & 0x3F003F; u32 g = val & 0x003F00; rb -= (((rb * factor) >> 4) & 0x3F003F); g -= (((g * factor) >> 4) & 0x003F00); return rb | g | 0xFF000000; } u32 GPU2D::ColorComposite(int i, u32 val1, u32 val2) { u32 coloreffect = 0; u32 eva, evb; u32 flag1 = val1 >> 24; u32 flag2 = val2 >> 24; u32 target2; if (flag2 & 0x80) target2 = 0x1000; else if (flag2 & 0x40) target2 = 0x0100; else target2 = flag2 << 8; if ((flag1 & 0x80) && (BlendCnt & target2)) { // sprite blending coloreffect = 1; if (flag1 & 0x40) { eva = flag1 & 0x1F; evb = 16 - eva; } else { eva = EVA; evb = EVB; } } else if ((flag1 & 0x40) && (BlendCnt & target2)) { // 3D layer blending coloreffect = 4; } else { if (flag1 & 0x80) flag1 = 0x10; else if (flag1 & 0x40) flag1 = 0x01; if ((BlendCnt & flag1) && (WindowMask[i] & 0x20)) { coloreffect = (BlendCnt >> 6) & 0x3; if (coloreffect == 1) { if (BlendCnt & target2) { eva = EVA; evb = EVB; } else coloreffect = 0; } } } switch (coloreffect) { case 0: return val1; case 1: return ColorBlend4(val1, val2, eva, evb); case 2: return ColorBrightnessUp(val1, EVY); case 3: return ColorBrightnessDown(val1, EVY); case 4: return ColorBlend5(val1, val2); } return val1; } void GPU2D::UpdateMosaicCounters(u32 line) { // Y mosaic uses incrementing 4-bit counters // the transformed Y position is updated every time the counter matches the MOSAIC register if (OBJMosaicYCount == OBJMosaicSize[1]) { OBJMosaicYCount = 0; OBJMosaicY = line + 1; } else { OBJMosaicYCount++; OBJMosaicYCount &= 0xF; } } void GPU2D::DrawScanline(u32 line) { int stride = Accelerated ? (256*3 + 1) : 256; u32* dst = &Framebuffer[stride * line]; int n3dline = line; line = GPU::VCount; bool forceblank = false; // scanlines that end up outside of the GPU drawing range // (as a result of writing to VCount) are filled white if (line > 192) forceblank = true; // GPU B can be completely disabled by POWCNT1 // oddly that's not the case for GPU A if (Num && !Enabled) forceblank = true; if (forceblank) { for (int i = 0; i < 256; i++) dst[i] = 0xFFFFFFFF; if (Accelerated) { dst[256*3] = 0; } return; } u32 dispmode = DispCnt >> 16; dispmode &= (Num ? 0x1 : 0x3); if (Num == 0) { if (!Accelerated) _3DLine = GPU3D::GetLine(n3dline); else if ((CaptureCnt & (1<<31)) && (((CaptureCnt >> 29) & 0x3) != 1)) { _3DLine = GPU3D::GetLine(n3dline); //GPU3D::GLRenderer::PrepareCaptureFrame(); } } // always render regular graphics DrawScanline_BGOBJ(line); UpdateMosaicCounters(line); switch (dispmode) { case 0: // screen off { for (int i = 0; i < 256; i++) dst[i] = 0x003F3F3F; } break; case 1: // regular display { int i = 0; for (; i < (stride & ~1); i+=2) *(u64*)&dst[i] = *(u64*)&BGOBJLine[i]; if (stride & 1) dst[i] = BGOBJLine[i]; } break; case 2: // VRAM display { u32 vrambank = (DispCnt >> 18) & 0x3; if (GPU::VRAMMap_LCDC & (1<> 4; u8 b = (color & 0x7C00) >> 9; dst[i] = r | (g << 8) | (b << 16); } } else { for (int i = 0; i < 256; i++) { dst[i] = 0; } } } break; case 3: // FIFO display { for (int i = 0; i < 256; i++) { u16 color = DispFIFOBuffer[i]; u8 r = (color & 0x001F) << 1; u8 g = (color & 0x03E0) >> 4; u8 b = (color & 0x7C00) >> 9; dst[i] = r | (g << 8) | (b << 16); } } break; } // capture if ((Num == 0) && (CaptureCnt & (1<<31))) { u32 capwidth, capheight; switch ((CaptureCnt >> 20) & 0x3) { case 0: capwidth = 128; capheight = 128; break; case 1: capwidth = 256; capheight = 64; break; case 2: capwidth = 256; capheight = 128; break; case 3: capwidth = 256; capheight = 192; break; } if (line < capheight) DoCapture(line, capwidth); } if (Accelerated) { dst[256*3] = MasterBrightness | (DispCnt & 0x30000); return; } // master brightness if (dispmode != 0) { if ((MasterBrightness >> 14) == 1) { // up u32 factor = MasterBrightness & 0x1F; if (factor > 16) factor = 16; for (int i = 0; i < 256; i++) { dst[i] = ColorBrightnessUp(dst[i], factor); } } else if ((MasterBrightness >> 14) == 2) { // down u32 factor = MasterBrightness & 0x1F; if (factor > 16) factor = 16; for (int i = 0; i < 256; i++) { dst[i] = ColorBrightnessDown(dst[i], factor); } } } // convert to 32-bit BGRA // note: 32-bit RGBA would be more straightforward, but // BGRA seems to be more compatible (Direct2D soft, cairo...) for (int i = 0; i < 256; i+=2) { u64 c = *(u64*)&dst[i]; u64 r = (c << 18) & 0xFC000000FC0000; u64 g = (c << 2) & 0xFC000000FC00; u64 b = (c >> 14) & 0xFC000000FC; c = r | g | b; *(u64*)&dst[i] = c | ((c & 0x00C0C0C000C0C0C0) >> 6) | 0xFF000000FF000000; } } void GPU2D::VBlank() { CaptureCnt &= ~(1<<31); DispFIFOReadPtr = 0; DispFIFOWritePtr = 0; } void GPU2D::VBlankEnd() { // TODO: find out the exact time this happens BGXRefInternal[0] = BGXRef[0]; BGXRefInternal[1] = BGXRef[1]; BGYRefInternal[0] = BGYRef[0]; BGYRefInternal[1] = BGYRef[1]; BGMosaicY = 0; BGMosaicYMax = BGMosaicSize[1]; //OBJMosaicY = 0; //OBJMosaicYMax = OBJMosaicSize[1]; //OBJMosaicY = 0; //OBJMosaicYCount = 0; if (Accelerated) { if ((Num == 0) && (CaptureCnt & (1<<31)) && (((CaptureCnt >> 29) & 0x3) != 1)) { GPU3D::GLRenderer::PrepareCaptureFrame(); } } } void GPU2D::DoCapture(u32 line, u32 width) { u32 dstvram = (CaptureCnt >> 16) & 0x3; // TODO: confirm this // it should work like VRAM display mode, which requires VRAM to be mapped to LCDC if (!(GPU::VRAMMap_LCDC & (1<> 18) & 0x3) << 14) + (line * width); // TODO: handle 3D in accelerated mode!! u32* srcA; if (CaptureCnt & (1<<24)) { srcA = _3DLine; } else { srcA = BGOBJLine; if (Accelerated) { // in accelerated mode, compositing is normally done on the GPU // but when doing display capture, we do need the composited output // so we do it here for (int i = 0; i < 256; i++) { u32 val1 = BGOBJLine[i]; u32 val2 = BGOBJLine[256+i]; u32 val3 = BGOBJLine[512+i]; u32 compmode = (val3 >> 24) & 0xF; if (compmode == 4) { // 3D on top, blending u32 _3dval = _3DLine[val3 & 0xFF]; if ((_3dval >> 24) > 0) val1 = ColorBlend5(_3dval, val1); else val1 = val2; } else if (compmode == 1) { // 3D on bottom, blending u32 _3dval = _3DLine[val3 & 0xFF]; if ((_3dval >> 24) > 0) { u32 eva = (val3 >> 8) & 0x1F; u32 evb = (val3 >> 16) & 0x1F; val1 = ColorBlend4(val1, _3dval, eva, evb); } else val1 = val2; } else if (compmode <= 3) { // 3D on top, normal/fade u32 _3dval = _3DLine[val3 & 0xFF]; if ((_3dval >> 24) > 0) { u32 evy = (val3 >> 8) & 0x1F; val1 = _3dval; if (compmode == 2) val1 = ColorBrightnessUp(val1, evy); else if (compmode == 3) val1 = ColorBrightnessDown(val1, evy); } else val1 = val2; } BGOBJLine[i] = val1; } } } u16* srcB = NULL; u32 srcBaddr = line * 256; if (CaptureCnt & (1<<25)) { srcB = &DispFIFOBuffer[0]; srcBaddr = 0; } else { u32 srcvram = (DispCnt >> 18) & 0x3; if (GPU::VRAMMap_LCDC & (1<> 16) & 0x3) != 2) srcBaddr += ((CaptureCnt >> 26) & 0x3) << 14; } dstaddr &= 0xFFFF; srcBaddr &= 0xFFFF; switch ((CaptureCnt >> 29) & 0x3) { case 0: // source A { for (u32 i = 0; i < width; i++) { u32 val = srcA[i]; // TODO: check what happens when alpha=0 u32 r = (val >> 1) & 0x1F; u32 g = (val >> 9) & 0x1F; u32 b = (val >> 17) & 0x1F; u32 a = ((val >> 24) != 0) ? 0x8000 : 0; dst[dstaddr] = r | (g << 5) | (b << 10) | a; dstaddr = (dstaddr + 1) & 0xFFFF; } } break; case 1: // source B { if (srcB) { for (u32 i = 0; i < width; i++) { dst[dstaddr] = srcB[srcBaddr]; srcBaddr = (srcBaddr + 1) & 0xFFFF; dstaddr = (dstaddr + 1) & 0xFFFF; } } else { for (u32 i = 0; i < width; i++) { dst[dstaddr] = 0; dstaddr = (dstaddr + 1) & 0xFFFF; } } } break; case 2: // sources A+B case 3: { u32 eva = CaptureCnt & 0x1F; u32 evb = (CaptureCnt >> 8) & 0x1F; // checkme if (eva > 16) eva = 16; if (evb > 16) evb = 16; if (srcB) { for (u32 i = 0; i < width; i++) { u32 val = srcA[i]; // TODO: check what happens when alpha=0 u32 rA = (val >> 1) & 0x1F; u32 gA = (val >> 9) & 0x1F; u32 bA = (val >> 17) & 0x1F; u32 aA = ((val >> 24) != 0) ? 1 : 0; val = srcB[srcBaddr]; u32 rB = val & 0x1F; u32 gB = (val >> 5) & 0x1F; u32 bB = (val >> 10) & 0x1F; u32 aB = val >> 15; u32 rD = ((rA * aA * eva) + (rB * aB * evb)) >> 4; u32 gD = ((gA * aA * eva) + (gB * aB * evb)) >> 4; u32 bD = ((bA * aA * eva) + (bB * aB * evb)) >> 4; u32 aD = (eva>0 ? aA : 0) | (evb>0 ? aB : 0); if (rD > 0x1F) rD = 0x1F; if (gD > 0x1F) gD = 0x1F; if (bD > 0x1F) bD = 0x1F; dst[dstaddr] = rD | (gD << 5) | (bD << 10) | (aD << 15); srcBaddr = (srcBaddr + 1) & 0xFFFF; dstaddr = (dstaddr + 1) & 0xFFFF; } } else { for (u32 i = 0; i < width; i++) { u32 val = srcA[i]; // TODO: check what happens when alpha=0 u32 rA = (val >> 1) & 0x1F; u32 gA = (val >> 9) & 0x1F; u32 bA = (val >> 17) & 0x1F; u32 aA = ((val >> 24) != 0) ? 1 : 0; u32 rD = (rA * aA * eva) >> 4; u32 gD = (gA * aA * eva) >> 4; u32 bD = (bA * aA * eva) >> 4; u32 aD = (eva>0 ? aA : 0); dst[dstaddr] = rD | (gD << 5) | (bD << 10) | (aD << 15); dstaddr = (dstaddr + 1) & 0xFFFF; } } } break; } } void GPU2D::SampleFIFO(u32 offset, u32 num) { for (u32 i = 0; i < num; i++) { u16 val = DispFIFO[DispFIFOReadPtr]; DispFIFOReadPtr++; DispFIFOReadPtr &= 0xF; DispFIFOBuffer[offset+i] = val; } } void GPU2D::BGExtPalDirty(u32 base) { BGExtPalStatus[base] = 0; BGExtPalStatus[base+1] = 0; } void GPU2D::OBJExtPalDirty() { OBJExtPalStatus = 0; } u16* GPU2D::GetBGExtPal(u32 slot, u32 pal) { u16* dst = &BGExtPalCache[slot][pal << 8]; if (!(BGExtPalStatus[slot] & (1< 0)) DrawBG_##type(line, num); else DrawBG_##type(line, num); } #define DoDrawBG_Large(line) \ { if ((BGCnt[2] & 0x0040) && (BGMosaicSize[0] > 0)) DrawBG_Large(line); else DrawBG_Large(line); } template void GPU2D::DrawScanlineBGMode(u32 line) { for (int i = 3; i >= 0; i--) { if ((BGCnt[3] & 0x3) == i) { if (DispCnt & 0x0800) { if (bgmode >= 3) DoDrawBG(Extended, line, 3) else if (bgmode >= 1) DoDrawBG(Affine, line, 3) else DoDrawBG(Text, line, 3) } } if ((BGCnt[2] & 0x3) == i) { if (DispCnt & 0x0400) { if (bgmode == 5) DoDrawBG(Extended, line, 2) else if (bgmode == 4 || bgmode == 2) DoDrawBG(Affine, line, 2) else DoDrawBG(Text, line, 2) } } if ((BGCnt[1] & 0x3) == i) { if (DispCnt & 0x0200) { DoDrawBG(Text, line, 1) } } if ((BGCnt[0] & 0x3) == i) { if (DispCnt & 0x0100) { if ((!Num) && (DispCnt & 0x8)) DrawBG_3D(); else DoDrawBG(Text, line, 0) } } if ((DispCnt & 0x1000) && NumSprites) InterleaveSprites(0x40000 | (i<<16)); } } void GPU2D::DrawScanlineBGMode6(u32 line) { for (int i = 3; i >= 0; i--) { if ((BGCnt[2] & 0x3) == i) { if (DispCnt & 0x0400) { DoDrawBG_Large(line) } } if ((BGCnt[0] & 0x3) == i) { if (DispCnt & 0x0100) { if ((!Num) && (DispCnt & 0x8)) DrawBG_3D(); } } if ((DispCnt & 0x1000) && NumSprites) InterleaveSprites(0x40000 | (i<<16)); } } void GPU2D::DrawScanlineBGMode7(u32 line) { // mode 7 only has text-mode BG0 and BG1 for (int i = 3; i >= 0; i--) { if ((BGCnt[1] & 0x3) == i) { if (DispCnt & 0x0200) { DoDrawBG(Text, line, 1) } } if ((BGCnt[0] & 0x3) == i) { if (DispCnt & 0x0100) { if ((!Num) && (DispCnt & 0x8)) DrawBG_3D(); else DoDrawBG(Text, line, 0) } } if ((DispCnt & 0x1000) && NumSprites) InterleaveSprites(0x40000 | (i<<16)); } } void GPU2D::DrawScanline_BGOBJ(u32 line) { // forced blank disables BG/OBJ compositing if (DispCnt & (1<<7)) { for (int i = 0; i < 256; i++) BGOBJLine[i] = 0xFF3F3F3F; return; } u64 backdrop; if (Num) backdrop = *(u16*)&GPU::Palette[0x400]; else backdrop = *(u16*)&GPU::Palette[0]; { u8 r = (backdrop & 0x001F) << 1; u8 g = (backdrop & 0x03E0) >> 4; u8 b = (backdrop & 0x7C00) >> 9; backdrop = r | (g << 8) | (b << 16) | 0x20000000; backdrop |= (backdrop << 32); for (int i = 0; i < 256; i+=2) *(u64*)&BGOBJLine[i] = backdrop; } if (DispCnt & 0xE000) CalculateWindowMask(line); else memset(WindowMask, 0xFF, 256); ApplySpriteMosaicX(); switch (DispCnt & 0x7) { case 0: DrawScanlineBGMode<0>(line); break; case 1: DrawScanlineBGMode<1>(line); break; case 2: DrawScanlineBGMode<2>(line); break; case 3: DrawScanlineBGMode<3>(line); break; case 4: DrawScanlineBGMode<4>(line); break; case 5: DrawScanlineBGMode<5>(line); break; case 6: DrawScanlineBGMode6(line); break; case 7: DrawScanlineBGMode7(line); break; } // color special effects // can likely be optimized if (!Accelerated) { for (int i = 0; i < 256; i++) { u32 val1 = BGOBJLine[i]; u32 val2 = BGOBJLine[256+i]; BGOBJLine[i] = ColorComposite(i, val1, val2); } } else { if (Num == 0) { for (int i = 0; i < 256; i++) { u32 val1 = BGOBJLine[i]; u32 val2 = BGOBJLine[256+i]; u32 val3 = BGOBJLine[512+i]; u32 flag1 = val1 >> 24; u32 flag2 = val2 >> 24; u32 bldcnteffect = (BlendCnt >> 6) & 0x3; u32 target1; if (flag1 & 0x80) target1 = 0x0010; else if (flag1 & 0x40) target1 = 0x0001; else target1 = flag1; u32 target2; if (flag2 & 0x80) target2 = 0x1000; else if (flag2 & 0x40) target2 = 0x0100; else target2 = flag2 << 8; if (((flag1 & 0xC0) == 0x40) && (BlendCnt & target2)) { // 3D on top, blending BGOBJLine[i] = val2; BGOBJLine[256+i] = ColorComposite(i, val2, val3); BGOBJLine[512+i] = 0x04000000 | (val1 & 0xFF); } else if ((flag1 & 0xC0) == 0x40) { // 3D on top, normal/fade if (bldcnteffect == 1) bldcnteffect = 0; if (!(BlendCnt & 0x0001)) bldcnteffect = 0; if (!(WindowMask[i] & 0x20)) bldcnteffect = 0; BGOBJLine[i] = val2; BGOBJLine[256+i] = ColorComposite(i, val2, val3); BGOBJLine[512+i] = (bldcnteffect << 24) | (EVY << 8) | (val1 & 0xFF); } else if (((flag2 & 0xC0) == 0x40) && ((BlendCnt & 0x01C0) == 0x0140)) { // 3D on bottom, blending u32 eva, evb; if ((flag1 & 0xC0) == 0xC0) { eva = flag1 & 0x1F; evb = 16 - eva; } else if (((BlendCnt & target1) && (WindowMask[i] & 0x20)) || ((flag1 & 0xC0) == 0x80)) { eva = EVA; evb = EVB; } else bldcnteffect = 7; BGOBJLine[i] = val1; BGOBJLine[256+i] = ColorComposite(i, val1, val3); BGOBJLine[512+i] = (bldcnteffect << 24) | (EVB << 16) | (EVA << 8) | (val2 & 0xFF); } else { // no potential 3D pixel involved BGOBJLine[i] = ColorComposite(i, val1, val2); BGOBJLine[256+i] = 0; BGOBJLine[512+i] = 0x07000000; } } } else { for (int i = 0; i < 256; i++) { u32 val1 = BGOBJLine[i]; u32 val2 = BGOBJLine[256+i]; BGOBJLine[i] = ColorComposite(i, val1, val2); BGOBJLine[256+i] = 0; BGOBJLine[512+i] = 0x07000000; } } } if (BGMosaicY >= BGMosaicYMax) { BGMosaicY = 0; BGMosaicYMax = BGMosaicSize[1]; } else BGMosaicY++; /*if (OBJMosaicY >= OBJMosaicYMax) { OBJMosaicY = 0; OBJMosaicYMax = OBJMosaicSize[1]; } else OBJMosaicY++;*/ } void GPU2D::DrawPixel_Normal(u32* dst, u16 color, u32 flag) { u8 r = (color & 0x001F) << 1; u8 g = (color & 0x03E0) >> 4; u8 b = (color & 0x7C00) >> 9; //g |= ((color & 0x8000) >> 15); *(dst+256) = *dst; *dst = r | (g << 8) | (b << 16) | flag; } void GPU2D::DrawPixel_Accel(u32* dst, u16 color, u32 flag) { u8 r = (color & 0x001F) << 1; u8 g = (color & 0x03E0) >> 4; u8 b = (color & 0x7C00) >> 9; *(dst+512) = *(dst+256); *(dst+256) = *dst; *dst = r | (g << 8) | (b << 16) | flag; } void GPU2D::DrawBG_3D() { u16 xoff = BGXPos[0]; int i = 0; int iend = 256; if (xoff & 0x100) { i = (0x100 - (xoff & 0xFF)); xoff += i; } if ((xoff - i + iend - 1) & 0x100) { iend -= (xoff & 0xFF); } if (Accelerated) { for (; i < iend; i++) { int pos = xoff++; if (!(WindowMask[i] & 0x01)) continue; BGOBJLine[i+512] = BGOBJLine[i+256]; BGOBJLine[i+256] = BGOBJLine[i]; BGOBJLine[i] = 0x40000000 | pos; // 3D-layer placeholder } } else { for (; i < iend; i++) { u32 c = _3DLine[xoff]; xoff++; if ((c >> 24) == 0) continue; if (!(WindowMask[i] & 0x01)) continue; BGOBJLine[i+256] = BGOBJLine[i]; BGOBJLine[i] = c | 0x40000000; } } } template void GPU2D::DrawBG_Text(u32 line, u32 bgnum) { u16 bgcnt = BGCnt[bgnum]; u32 tilesetaddr, tilemapaddr; u16* pal; u32 extpal, extpalslot; u16 xoff = BGXPos[bgnum]; u16 yoff = BGYPos[bgnum] + line; if (bgcnt & 0x0040) { // vertical mosaic yoff -= BGMosaicY; } u32 widexmask = (bgcnt & 0x4000) ? 0x100 : 0; extpal = (DispCnt & 0x40000000); if (extpal) extpalslot = ((bgnum<2) && (bgcnt&0x2000)) ? (2+bgnum) : bgnum; if (Num) { tilesetaddr = 0x06200000 + ((bgcnt & 0x003C) << 12); tilemapaddr = 0x06200000 + ((bgcnt & 0x1F00) << 3); pal = (u16*)&GPU::Palette[0x400]; } else { tilesetaddr = 0x06000000 + ((DispCnt & 0x07000000) >> 8) + ((bgcnt & 0x003C) << 12); tilemapaddr = 0x06000000 + ((DispCnt & 0x38000000) >> 11) + ((bgcnt & 0x1F00) << 3); pal = (u16*)&GPU::Palette[0]; } // adjust Y position in tilemap if (bgcnt & 0x8000) { tilemapaddr += ((yoff & 0x1F8) << 3); if (bgcnt & 0x4000) tilemapaddr += ((yoff & 0x100) << 3); } else tilemapaddr += ((yoff & 0xF8) << 3); u16 curtile; u16* curpal; u32 pixelsaddr; u8 color; u32 lastxpos; if (bgcnt & 0x0080) { // 256-color // preload shit as needed if ((xoff & 0x7) || mosaic) { curtile = GPU::ReadVRAM_BG(tilemapaddr + ((xoff & 0xF8) >> 2) + ((xoff & widexmask) << 3)); if (extpal) curpal = GetBGExtPal(extpalslot, curtile>>12); else curpal = pal; pixelsaddr = tilesetaddr + ((curtile & 0x03FF) << 6) + (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 3); } if (mosaic) lastxpos = xoff; for (int i = 0; i < 256; i++) { u32 xpos; if (mosaic) xpos = xoff - CurBGXMosaicTable[i]; else xpos = xoff; if ((!mosaic && (!(xpos & 0x7))) || (mosaic && ((xpos >> 3) != (lastxpos >> 3)))) { // load a new tile curtile = GPU::ReadVRAM_BG(tilemapaddr + ((xpos & 0xF8) >> 2) + ((xpos & widexmask) << 3)); if (extpal) curpal = GetBGExtPal(extpalslot, curtile>>12); else curpal = pal; pixelsaddr = tilesetaddr + ((curtile & 0x03FF) << 6) + (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 3); if (mosaic) lastxpos = xpos; } // draw pixel if (WindowMask[i] & (1<(pixelsaddr + tilexoff); if (color) DrawPixel(&BGOBJLine[i], curpal[color], 0x01000000<(tilemapaddr + ((xoff & 0xF8) >> 2) + ((xoff & widexmask) << 3)); curpal = pal + ((curtile & 0xF000) >> 8); pixelsaddr = tilesetaddr + ((curtile & 0x03FF) << 5) + (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 2); } if (mosaic) lastxpos = xoff; for (int i = 0; i < 256; i++) { u32 xpos; if (mosaic) xpos = xoff - CurBGXMosaicTable[i]; else xpos = xoff; if ((!mosaic && (!(xpos & 0x7))) || (mosaic && ((xpos >> 3) != (lastxpos >> 3)))) { // load a new tile curtile = GPU::ReadVRAM_BG(tilemapaddr + ((xpos & 0xF8) >> 2) + ((xpos & widexmask) << 3)); curpal = pal + ((curtile & 0xF000) >> 8); pixelsaddr = tilesetaddr + ((curtile & 0x03FF) << 5) + (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 2); if (mosaic) lastxpos = xpos; } // draw pixel if (WindowMask[i] & (1<(pixelsaddr + (tilexoff >> 1)) >> 4; } else { color = GPU::ReadVRAM_BG(pixelsaddr + (tilexoff >> 1)) & 0x0F; } if (color) DrawPixel(&BGOBJLine[i], curpal[color], 0x01000000< void GPU2D::DrawBG_Affine(u32 line, u32 bgnum) { u16 bgcnt = BGCnt[bgnum]; u32 tilesetaddr, tilemapaddr; u16* pal; u32 coordmask; u32 yshift; switch (bgcnt & 0xC000) { case 0x0000: coordmask = 0x07800; yshift = 7; break; case 0x4000: coordmask = 0x0F800; yshift = 8; break; case 0x8000: coordmask = 0x1F800; yshift = 9; break; case 0xC000: coordmask = 0x3F800; yshift = 10; break; } u32 overflowmask; if (bgcnt & 0x2000) overflowmask = 0; else overflowmask = ~(coordmask | 0x7FF); s16 rotA = BGRotA[bgnum-2]; s16 rotB = BGRotB[bgnum-2]; s16 rotC = BGRotC[bgnum-2]; s16 rotD = BGRotD[bgnum-2]; s32 rotX = BGXRefInternal[bgnum-2]; s32 rotY = BGYRefInternal[bgnum-2]; if (bgcnt & 0x0040) { // vertical mosaic rotX -= (BGMosaicY * rotB); rotY -= (BGMosaicY * rotD); } if (Num) { tilesetaddr = 0x06200000 + ((bgcnt & 0x003C) << 12); tilemapaddr = 0x06200000 + ((bgcnt & 0x1F00) << 3); pal = (u16*)&GPU::Palette[0x400]; } else { tilesetaddr = 0x06000000 + ((DispCnt & 0x07000000) >> 8) + ((bgcnt & 0x003C) << 12); tilemapaddr = 0x06000000 + ((DispCnt & 0x38000000) >> 11) + ((bgcnt & 0x1F00) << 3); pal = (u16*)&GPU::Palette[0]; } u16 curtile; u8 color; yshift -= 3; for (int i = 0; i < 256; i++) { if (WindowMask[i] & (1<(tilemapaddr + ((((finalY & coordmask) >> 11) << yshift) + ((finalX & coordmask) >> 11))); // draw pixel u32 tilexoff = (finalX >> 8) & 0x7; u32 tileyoff = (finalY >> 8) & 0x7; color = GPU::ReadVRAM_BG(tilesetaddr + (curtile << 6) + (tileyoff << 3) + tilexoff); if (color) DrawPixel(&BGOBJLine[i], pal[color], 0x01000000< void GPU2D::DrawBG_Extended(u32 line, u32 bgnum) { u16 bgcnt = BGCnt[bgnum]; u32 tilesetaddr, tilemapaddr; u16* pal; u32 extpal; extpal = (DispCnt & 0x40000000); s16 rotA = BGRotA[bgnum-2]; s16 rotB = BGRotB[bgnum-2]; s16 rotC = BGRotC[bgnum-2]; s16 rotD = BGRotD[bgnum-2]; s32 rotX = BGXRefInternal[bgnum-2]; s32 rotY = BGYRefInternal[bgnum-2]; if (bgcnt & 0x0040) { // vertical mosaic rotX -= (BGMosaicY * rotB); rotY -= (BGMosaicY * rotD); } if (bgcnt & 0x0080) { // bitmap modes u32 xmask, ymask; u32 yshift; switch (bgcnt & 0xC000) { case 0x0000: xmask = 0x07FFF; ymask = 0x07FFF; yshift = 7; break; case 0x4000: xmask = 0x0FFFF; ymask = 0x0FFFF; yshift = 8; break; case 0x8000: xmask = 0x1FFFF; ymask = 0x0FFFF; yshift = 9; break; case 0xC000: xmask = 0x1FFFF; ymask = 0x1FFFF; yshift = 9; break; } u32 ofxmask, ofymask; if (bgcnt & 0x2000) { ofxmask = 0; ofymask = 0; } else { ofxmask = ~xmask; ofymask = ~ymask; } if (Num) tilemapaddr = 0x06200000 + ((bgcnt & 0x1F00) << 6); else tilemapaddr = 0x06000000 + ((bgcnt & 0x1F00) << 6); if (bgcnt & 0x0004) { // direct color bitmap u16 color; for (int i = 0; i < 256; i++) { if (WindowMask[i] & (1<(tilemapaddr + (((((finalY & ymask) >> 8) << yshift) + ((finalX & xmask) >> 8)) << 1)); if (color & 0x8000) DrawPixel(&BGOBJLine[i], color, 0x01000000<(tilemapaddr + (((finalY & ymask) >> 8) << yshift) + ((finalX & xmask) >> 8)); if (color) DrawPixel(&BGOBJLine[i], pal[color], 0x01000000<> 8) + ((bgcnt & 0x003C) << 12); tilemapaddr = 0x06000000 + ((DispCnt & 0x38000000) >> 11) + ((bgcnt & 0x1F00) << 3); pal = (u16*)&GPU::Palette[0]; } u16 curtile; u16* curpal; u8 color; yshift -= 3; for (int i = 0; i < 256; i++) { if (WindowMask[i] & (1<(tilemapaddr + (((((finalY & coordmask) >> 11) << yshift) + ((finalX & coordmask) >> 11)) << 1)); if (extpal) curpal = GetBGExtPal(bgnum, curtile>>12); else curpal = pal; // draw pixel u32 tilexoff = (finalX >> 8) & 0x7; u32 tileyoff = (finalY >> 8) & 0x7; if (curtile & 0x0400) tilexoff = 7-tilexoff; if (curtile & 0x0800) tileyoff = 7-tileyoff; color = GPU::ReadVRAM_BG(tilesetaddr + ((curtile & 0x03FF) << 6) + (tileyoff << 3) + tilexoff); if (color) DrawPixel(&BGOBJLine[i], curpal[color], 0x01000000< void GPU2D::DrawBG_Large(u32 line) // BG is always BG2 { u16 bgcnt = BGCnt[2]; u32 tilesetaddr, tilemapaddr; u16* pal; // large BG sizes: // 0: 512x1024 // 1: 1024x512 // 2: 512x256 // 3: 512x512 u32 xmask, ymask; u32 yshift; switch (bgcnt & 0xC000) { case 0x0000: xmask = 0x1FFFF; ymask = 0x3FFFF; yshift = 9; break; case 0x4000: xmask = 0x3FFFF; ymask = 0x1FFFF; yshift = 10; break; case 0x8000: xmask = 0x1FFFF; ymask = 0x0FFFF; yshift = 9; break; case 0xC000: xmask = 0x1FFFF; ymask = 0x1FFFF; yshift = 9; break; } u32 ofxmask, ofymask; if (bgcnt & 0x2000) { ofxmask = 0; ofymask = 0; } else { ofxmask = ~xmask; ofymask = ~ymask; } s16 rotA = BGRotA[0]; s16 rotB = BGRotB[0]; s16 rotC = BGRotC[0]; s16 rotD = BGRotD[0]; s32 rotX = BGXRefInternal[0]; s32 rotY = BGYRefInternal[0]; if (bgcnt & 0x0040) { // vertical mosaic rotX -= (BGMosaicY * rotB); rotY -= (BGMosaicY * rotD); } if (Num) tilemapaddr = 0x06200000; else tilemapaddr = 0x06000000; // 256-color bitmap if (Num) pal = (u16*)&GPU::Palette[0x400]; else pal = (u16*)&GPU::Palette[0]; u8 color; for (int i = 0; i < 256; i++) { if (WindowMask[i] & (1<<2)) { s32 finalX, finalY; if (mosaic) { int im = CurBGXMosaicTable[i]; finalX = rotX - (im * rotA); finalY = rotY - (im * rotC); } else { finalX = rotX; finalY = rotY; } if (!(finalX & ofxmask) && !(finalY & ofymask)) { color = GPU::ReadVRAM_BG(tilemapaddr + (((finalY & ymask) >> 8) << yshift) + ((finalX & xmask) >> 8)); if (color) DrawPixel(&BGOBJLine[i], pal[color], 0x01000000<<2); } } rotX += rotA; rotY += rotC; } BGXRefInternal[0] += rotB; BGYRefInternal[0] += rotD; } // OBJ line buffer: // * bit0-15: color (bit15=1: direct color, bit15=0: palette index, bit12=0 to indicate extpal) // * bit16-17: BG-relative priority // * bit18: non-transparent sprite pixel exists here // * bit19: X mosaic should be applied here // * bit24-31: compositor flags void GPU2D::ApplySpriteMosaicX() { // apply X mosaic if needed // X mosaic for sprites is applied after all sprites are rendered if (OBJMosaicSize[0] == 0) return; u32 lastcolor = OBJLine[0]; for (u32 i = 1; i < 256; i++) { if (!(OBJLine[i] & 0x100000)) { // not a mosaic'd sprite pixel continue; } if ((OBJIndex[i] != OBJIndex[i-1]) || (CurOBJXMosaicTable[i] == 0)) lastcolor = OBJLine[i]; else OBJLine[i] = lastcolor; } } void GPU2D::InterleaveSprites(u32 prio) { u16* pal = (u16*)&GPU::Palette[Num ? 0x600 : 0x200]; if (DispCnt & 0x80000000) { u16* extpal = GetOBJExtPal(); for (u32 i = 0; i < 256; i++) { if ((OBJLine[i] & 0x70000) != prio) continue; if (!(WindowMask[i] & 0x10)) continue; u16 color; u32 pixel = OBJLine[i]; if (pixel & 0x8000) color = pixel & 0x7FFF; else if (pixel & 0x1000) color = pal[pixel & 0xFF]; else color = extpal[pixel & 0xFFF]; DrawPixel(&BGOBJLine[i], color, pixel & 0xFF000000); } } else { // optimized no-extpal version for (u32 i = 0; i < 256; i++) { if ((OBJLine[i] & 0x70000) != prio) continue; if (!(WindowMask[i] & 0x10)) continue; u16 color; u32 pixel = OBJLine[i]; if (pixel & 0x8000) color = pixel & 0x7FFF; else color = pal[pixel & 0xFF]; DrawPixel(&BGOBJLine[i], color, pixel & 0xFF000000); } } } #define DoDrawSprite(type, ...) \ if (iswin) \ { \ DrawSprite_##type(__VA_ARGS__); \ } \ else \ { \ DrawSprite_##type(__VA_ARGS__); \ } void GPU2D::DrawSprites(u32 line) { if (line == 0) { // reset those counters here // TODO: find out when those are supposed to be reset // it would make sense to reset them at the end of VBlank // however, sprites are rendered one scanline in advance // so they need to be reset a bit earlier OBJMosaicY = 0; OBJMosaicYCount = 0; } NumSprites = 0; memset(OBJLine, 0, 256*4); memset(OBJWindow, 0, 256); if (!(DispCnt & 0x1000)) return; memset(OBJIndex, 0xFF, 256); u16* oam = (u16*)&GPU::OAM[Num ? 0x400 : 0]; const s32 spritewidth[16] = { 8, 16, 8, 8, 16, 32, 8, 8, 32, 32, 16, 8, 64, 64, 32, 8 }; const s32 spriteheight[16] = { 8, 8, 16, 8, 16, 8, 32, 8, 32, 16, 32, 8, 64, 32, 64, 8 }; for (int bgnum = 0x0C00; bgnum >= 0x0000; bgnum -= 0x0400) { for (int sprnum = 127; sprnum >= 0; sprnum--) { u16* attrib = &oam[sprnum*4]; if ((attrib[2] & 0x0C00) != bgnum) continue; bool iswin = (((attrib[0] >> 10) & 0x3) == 2); u32 sprline; if ((attrib[0] & 0x1000) && !iswin) { // apply Y mosaic sprline = OBJMosaicY; } else sprline = line; if (attrib[0] & 0x0100) { u32 sizeparam = (attrib[0] >> 14) | ((attrib[1] & 0xC000) >> 12); s32 width = spritewidth[sizeparam]; s32 height = spriteheight[sizeparam]; s32 boundwidth = width; s32 boundheight = height; if (attrib[0] & 0x0200) { boundwidth <<= 1; boundheight <<= 1; } u32 ypos = attrib[0] & 0xFF; ypos = (sprline - ypos) & 0xFF; if (ypos >= (u32)boundheight) continue; s32 xpos = (s32)(attrib[1] << 23) >> 23; if (xpos <= -boundwidth) continue; u32 rotparamgroup = (attrib[1] >> 9) & 0x1F; DoDrawSprite(Rotscale, sprnum, boundwidth, boundheight, width, height, xpos, ypos); NumSprites++; } else { if (attrib[0] & 0x0200) continue; u32 sizeparam = (attrib[0] >> 14) | ((attrib[1] & 0xC000) >> 12); s32 width = spritewidth[sizeparam]; s32 height = spriteheight[sizeparam]; u32 ypos = attrib[0] & 0xFF; ypos = (sprline - ypos) & 0xFF; if (ypos >= (u32)height) continue; s32 xpos = (s32)(attrib[1] << 23) >> 23; if (xpos <= -width) continue; DoDrawSprite(Normal, sprnum, width, height, xpos, ypos); NumSprites++; } } } } template void GPU2D::DrawSprite_Rotscale(u32 num, u32 boundwidth, u32 boundheight, u32 width, u32 height, s32 xpos, s32 ypos) { u16* oam = (u16*)&GPU::OAM[Num ? 0x400 : 0]; u16* attrib = &oam[num * 4]; u16* rotparams = &oam[(((attrib[1] >> 9) & 0x1F) * 16) + 3]; u32 pixelattr = ((attrib[2] & 0x0C00) << 6) | 0xC0000; u32 tilenum = attrib[2] & 0x03FF; u32 spritemode = window ? 0 : ((attrib[0] >> 10) & 0x3); u32 ytilefactor; s32 centerX = boundwidth >> 1; s32 centerY = boundheight >> 1; if ((attrib[0] & 0x1000) && !window) { // apply Y mosaic pixelattr |= 0x100000; } u32 xoff; if (xpos >= 0) { xoff = 0; if ((xpos+boundwidth) > 256) boundwidth = 256-xpos; } else { xoff = -xpos; xpos = 0; } s16 rotA = (s16)rotparams[0]; s16 rotB = (s16)rotparams[4]; s16 rotC = (s16)rotparams[8]; s16 rotD = (s16)rotparams[12]; s32 rotX = ((xoff-centerX) * rotA) + ((ypos-centerY) * rotB) + (width << 7); s32 rotY = ((xoff-centerX) * rotC) + ((ypos-centerY) * rotD) + (height << 7); width <<= 8; height <<= 8; u16 color = 0; // transparent in all cases if (spritemode == 3) { u32 alpha = attrib[2] >> 12; if (!alpha) return; alpha++; pixelattr |= (0xC0000000 | (alpha << 24)); if (DispCnt & 0x40) { if (DispCnt & 0x20) { // 'reserved' // draws nothing return; } else { tilenum <<= (7 + ((DispCnt >> 22) & 0x1)); ytilefactor = ((width >> 8) * 2); } } else { if (DispCnt & 0x20) { tilenum = ((tilenum & 0x01F) << 4) + ((tilenum & 0x3E0) << 7); ytilefactor = (256 * 2); } else { tilenum = ((tilenum & 0x00F) << 4) + ((tilenum & 0x3F0) << 7); ytilefactor = (128 * 2); } } u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; for (; xoff < boundwidth;) { if ((u32)rotX < width && (u32)rotY < height) { color = GPU::ReadVRAM_OBJ(pixelsaddr + ((rotY >> 8) * ytilefactor) + ((rotX >> 8) << 1)); if (color & 0x8000) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } } rotX += rotA; rotY += rotC; xoff++; xpos++; } } else { if (DispCnt & 0x10) { tilenum <<= ((DispCnt >> 20) & 0x3); ytilefactor = (width >> 11) << ((attrib[0] & 0x2000) ? 1:0); } else { ytilefactor = 0x20; } if (spritemode == 1) pixelattr |= 0x80000000; else pixelattr |= 0x10000000; if (attrib[0] & 0x2000) { // 256-color tilenum <<= 5; ytilefactor <<= 5; u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; if (!window) { if (!(DispCnt & 0x80000000)) pixelattr |= 0x1000; else pixelattr |= ((attrib[2] & 0xF000) >> 4); } for (; xoff < boundwidth;) { if ((u32)rotX < width && (u32)rotY < height) { color = GPU::ReadVRAM_OBJ(pixelsaddr + ((rotY>>11)*ytilefactor) + ((rotY&0x700)>>5) + ((rotX>>11)*64) + ((rotX&0x700)>>8)); if (color) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } } rotX += rotA; rotY += rotC; xoff++; xpos++; } } else { // 16-color tilenum <<= 5; ytilefactor <<= 5; u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; if (!window) { pixelattr |= 0x1000; pixelattr |= ((attrib[2] & 0xF000) >> 8); } for (; xoff < boundwidth;) { if ((u32)rotX < width && (u32)rotY < height) { color = GPU::ReadVRAM_OBJ(pixelsaddr + ((rotY>>11)*ytilefactor) + ((rotY&0x700)>>6) + ((rotX>>11)*32) + ((rotX&0x700)>>9)); if (rotX & 0x100) color >>= 4; else color &= 0x0F; if (color) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } } rotX += rotA; rotY += rotC; xoff++; xpos++; } } } } template void GPU2D::DrawSprite_Normal(u32 num, u32 width, u32 height, s32 xpos, s32 ypos) { u16* oam = (u16*)&GPU::OAM[Num ? 0x400 : 0]; u16* attrib = &oam[num * 4]; u32 pixelattr = ((attrib[2] & 0x0C00) << 6) | 0xC0000; u32 tilenum = attrib[2] & 0x03FF; u32 spritemode = window ? 0 : ((attrib[0] >> 10) & 0x3); u32 wmask = width - 8; // really ((width - 1) & ~0x7) if ((attrib[0] & 0x1000) && !window) { // apply Y mosaic pixelattr |= 0x100000; } // yflip if (attrib[1] & 0x2000) ypos = height-1 - ypos; u32 xoff; u32 xend = width; if (xpos >= 0) { xoff = 0; if ((xpos+xend) > 256) xend = 256-xpos; } else { xoff = -xpos; xpos = 0; } u16 color = 0; // transparent in all cases if (spritemode == 3) { // bitmap sprite u32 alpha = attrib[2] >> 12; if (!alpha) return; alpha++; pixelattr |= (0xC0000000 | (alpha << 24)); if (DispCnt & 0x40) { if (DispCnt & 0x20) { // 'reserved' // draws nothing return; } else { tilenum <<= (7 + ((DispCnt >> 22) & 0x1)); tilenum += (ypos * width * 2); } } else { if (DispCnt & 0x20) { tilenum = ((tilenum & 0x01F) << 4) + ((tilenum & 0x3E0) << 7); tilenum += (ypos * 256 * 2); } else { tilenum = ((tilenum & 0x00F) << 4) + ((tilenum & 0x3F0) << 7); tilenum += (ypos * 128 * 2); } } u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; s32 pixelstride; if (attrib[1] & 0x1000) // xflip { pixelsaddr += (width-1 << 1); pixelsaddr -= (xoff << 1); pixelstride = -2; } else { pixelsaddr += (xoff << 1); pixelstride = 2; } for (; xoff < xend;) { color = GPU::ReadVRAM_OBJ(pixelsaddr); pixelsaddr += pixelstride; if (color & 0x8000) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } xoff++; xpos++; } } else { if (DispCnt & 0x10) { tilenum <<= ((DispCnt >> 20) & 0x3); tilenum += ((ypos >> 3) * (width >> 3)) << ((attrib[0] & 0x2000) ? 1:0); } else { tilenum += ((ypos >> 3) * 0x20); } if (spritemode == 1) pixelattr |= 0x80000000; else pixelattr |= 0x10000000; if (attrib[0] & 0x2000) { // 256-color tilenum <<= 5; u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; pixelsaddr += ((ypos & 0x7) << 3); s32 pixelstride; if (!window) { if (!(DispCnt & 0x80000000)) pixelattr |= 0x1000; else pixelattr |= ((attrib[2] & 0xF000) >> 4); } if (attrib[1] & 0x1000) // xflip { pixelsaddr += (((width-1) & wmask) << 3); pixelsaddr += ((width-1) & 0x7); pixelsaddr -= ((xoff & wmask) << 3); pixelsaddr -= (xoff & 0x7); pixelstride = -1; } else { pixelsaddr += ((xoff & wmask) << 3); pixelsaddr += (xoff & 0x7); pixelstride = 1; } for (; xoff < xend;) { color = GPU::ReadVRAM_OBJ(pixelsaddr); pixelsaddr += pixelstride; if (color) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } xoff++; xpos++; if (!(xoff & 0x7)) pixelsaddr += (56 * pixelstride); } } else { // 16-color tilenum <<= 5; u32 pixelsaddr = (Num ? 0x06600000 : 0x06400000) + tilenum; pixelsaddr += ((ypos & 0x7) << 2); s32 pixelstride; if (!window) { pixelattr |= 0x1000; pixelattr |= ((attrib[2] & 0xF000) >> 8); } // TODO: optimize VRAM access!! // TODO: do xflip better? the 'two pixels per byte' thing makes it a bit shitty if (attrib[1] & 0x1000) // xflip { pixelsaddr += (((width-1) & wmask) << 2); pixelsaddr += (((width-1) & 0x7) >> 1); pixelsaddr -= ((xoff & wmask) << 2); pixelsaddr -= ((xoff & 0x7) >> 1); pixelstride = -1; } else { pixelsaddr += ((xoff & wmask) << 2); pixelsaddr += ((xoff & 0x7) >> 1); pixelstride = 1; } for (; xoff < xend;) { if (attrib[1] & 0x1000) { if (xoff & 0x1) { color = GPU::ReadVRAM_OBJ(pixelsaddr) & 0x0F; pixelsaddr--; } else color = GPU::ReadVRAM_OBJ(pixelsaddr) >> 4; } else { if (xoff & 0x1) { color = GPU::ReadVRAM_OBJ(pixelsaddr) >> 4; pixelsaddr++; } else color = GPU::ReadVRAM_OBJ(pixelsaddr) & 0x0F; } if (color) { if (window) OBJWindow[xpos] = 1; else { OBJLine[xpos] = color | pixelattr; OBJIndex[xpos] = num; } } else if (!window) { if (OBJLine[xpos] == 0) { OBJLine[xpos] = pixelattr & 0x180000; OBJIndex[xpos] = num; } } xoff++; xpos++; if (!(xoff & 0x7)) pixelsaddr += ((attrib[1] & 0x1000) ? -28 : 28); } } } }