1250 lines
30 KiB
C
1250 lines
30 KiB
C
#include <limits.h>
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#include "global.h"
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#include "bg.h"
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#include "dma3.h"
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#include "gpu_regs.h"
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#define DISPCNT_ALL_BG_AND_MODE_BITS (DISPCNT_BG_ALL_ON | 0x7)
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struct BgControl
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{
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struct BgConfig {
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u8 visible:1;
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u8 unknown_1:1;
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u8 screenSize:2;
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u8 priority:2;
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u8 mosaic:1;
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u8 wraparound:1;
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u8 charBaseIndex:2;
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u8 mapBaseIndex:5;
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u8 paletteMode:1;
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u8 unknown_2; // Assigned to but never read
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u8 unknown_3; // Assigned to but never read
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} configs[NUM_BACKGROUNDS];
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u16 bgVisibilityAndMode;
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};
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struct BgConfig2
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{
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u32 baseTile:10;
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u32 basePalette:4;
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u32 unk_3:18;
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void* tilemap;
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s32 bg_x;
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s32 bg_y;
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};
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static struct BgControl sGpuBgConfigs;
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static struct BgConfig2 sGpuBgConfigs2[NUM_BACKGROUNDS];
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static u32 sDmaBusyBitfield[NUM_BACKGROUNDS];
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u32 gWindowTileAutoAllocEnabled;
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static const struct BgConfig sZeroedBgControlStruct = { 0 };
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static u32 GetBgType(u8 bg);
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void ResetBgs(void)
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{
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ResetBgControlStructs();
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sGpuBgConfigs.bgVisibilityAndMode = 0;
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SetTextModeAndHideBgs();
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}
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static void SetBgModeInternal(u8 bgMode)
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{
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sGpuBgConfigs.bgVisibilityAndMode &= ~0x7;
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sGpuBgConfigs.bgVisibilityAndMode |= bgMode;
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}
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u8 GetBgMode(void)
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{
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return sGpuBgConfigs.bgVisibilityAndMode & 0x7;
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}
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void ResetBgControlStructs(void)
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{
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int i;
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for (i = 0; i < NUM_BACKGROUNDS; i++)
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{
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sGpuBgConfigs.configs[i] = sZeroedBgControlStruct;
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}
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}
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void Unused_ResetBgControlStruct(u8 bg)
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{
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if (!IsInvalidBg(bg))
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{
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sGpuBgConfigs.configs[bg] = sZeroedBgControlStruct;
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}
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}
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enum
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{
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BG_CTRL_ATTR_VISIBLE = 1,
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BG_CTRL_ATTR_CHARBASEINDEX = 2,
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BG_CTRL_ATTR_MAPBASEINDEX = 3,
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BG_CTRL_ATTR_SCREENSIZE = 4,
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BG_CTRL_ATTR_PALETTEMODE = 5,
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BG_CTRL_ATTR_PRIORITY = 6,
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BG_CTRL_ATTR_MOSAIC = 7,
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BG_CTRL_ATTR_WRAPAROUND = 8,
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};
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static void SetBgControlAttributes(u8 bg, u8 charBaseIndex, u8 mapBaseIndex, u8 screenSize, u8 paletteMode, u8 priority, u8 mosaic, u8 wraparound)
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{
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if (!IsInvalidBg(bg))
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{
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if (charBaseIndex != 0xFF)
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{
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sGpuBgConfigs.configs[bg].charBaseIndex = charBaseIndex;
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}
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if (mapBaseIndex != 0xFF)
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{
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sGpuBgConfigs.configs[bg].mapBaseIndex = mapBaseIndex;
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}
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if (screenSize != 0xFF)
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{
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sGpuBgConfigs.configs[bg].screenSize = screenSize;
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}
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if (paletteMode != 0xFF)
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{
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sGpuBgConfigs.configs[bg].paletteMode = paletteMode;
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}
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if (priority != 0xFF)
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{
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sGpuBgConfigs.configs[bg].priority = priority;
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}
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if (mosaic != 0xFF)
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{
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sGpuBgConfigs.configs[bg].mosaic = mosaic;
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}
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if (wraparound != 0xFF)
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{
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sGpuBgConfigs.configs[bg].wraparound = wraparound;
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}
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sGpuBgConfigs.configs[bg].unknown_2 = 0;
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sGpuBgConfigs.configs[bg].unknown_3 = 0;
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sGpuBgConfigs.configs[bg].visible = 1;
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}
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}
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static u16 GetBgControlAttribute(u8 bg, u8 attributeId)
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{
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if (!IsInvalidBg(bg) && sGpuBgConfigs.configs[bg].visible)
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{
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switch (attributeId)
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{
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case BG_CTRL_ATTR_VISIBLE:
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return sGpuBgConfigs.configs[bg].visible;
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case BG_CTRL_ATTR_CHARBASEINDEX:
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return sGpuBgConfigs.configs[bg].charBaseIndex;
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case BG_CTRL_ATTR_MAPBASEINDEX:
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return sGpuBgConfigs.configs[bg].mapBaseIndex;
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case BG_CTRL_ATTR_SCREENSIZE:
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return sGpuBgConfigs.configs[bg].screenSize;
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case BG_CTRL_ATTR_PALETTEMODE:
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return sGpuBgConfigs.configs[bg].paletteMode;
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case BG_CTRL_ATTR_PRIORITY:
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return sGpuBgConfigs.configs[bg].priority;
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case BG_CTRL_ATTR_MOSAIC:
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return sGpuBgConfigs.configs[bg].mosaic;
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case BG_CTRL_ATTR_WRAPAROUND:
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return sGpuBgConfigs.configs[bg].wraparound;
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}
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}
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return 0xFF;
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}
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u8 LoadBgVram(u8 bg, const void *src, u16 size, u16 destOffset, u8 mode)
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{
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u16 offset;
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s8 cursor;
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if (IsInvalidBg(bg) || !sGpuBgConfigs.configs[bg].visible)
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return -1;
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switch (mode)
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{
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case 0x1:
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offset = sGpuBgConfigs.configs[bg].charBaseIndex * BG_CHAR_SIZE;
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offset = destOffset + offset;
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cursor = RequestDma3Copy(src, (void*)(offset + BG_VRAM), size, 0);
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if (cursor == -1)
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return -1;
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break;
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case 0x2:
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offset = sGpuBgConfigs.configs[bg].mapBaseIndex * BG_SCREEN_SIZE;
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offset = destOffset + offset;
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cursor = RequestDma3Copy(src, (void*)(offset + BG_VRAM), size, 0);
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if (cursor == -1)
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return -1;
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break;
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default:
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cursor = -1;
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break;
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}
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return cursor;
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}
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static void ShowBgInternal(u8 bg)
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{
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u16 value;
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if (!IsInvalidBg(bg) && sGpuBgConfigs.configs[bg].visible)
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{
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value = sGpuBgConfigs.configs[bg].priority |
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(sGpuBgConfigs.configs[bg].charBaseIndex << 2) |
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(sGpuBgConfigs.configs[bg].mosaic << 6) |
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(sGpuBgConfigs.configs[bg].paletteMode << 7) |
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(sGpuBgConfigs.configs[bg].mapBaseIndex << 8) |
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(sGpuBgConfigs.configs[bg].wraparound << 13) |
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(sGpuBgConfigs.configs[bg].screenSize << 14);
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SetGpuReg((bg << 1) + REG_OFFSET_BG0CNT, value);
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sGpuBgConfigs.bgVisibilityAndMode |= 1 << (bg + 8);
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sGpuBgConfigs.bgVisibilityAndMode &= DISPCNT_ALL_BG_AND_MODE_BITS;
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}
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}
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static void HideBgInternal(u8 bg)
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{
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if (!IsInvalidBg(bg))
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{
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sGpuBgConfigs.bgVisibilityAndMode &= ~(1 << (bg + 8));
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sGpuBgConfigs.bgVisibilityAndMode &= DISPCNT_ALL_BG_AND_MODE_BITS;
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}
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}
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static void SyncBgVisibilityAndMode(void)
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{
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SetGpuReg(REG_OFFSET_DISPCNT, (GetGpuReg(REG_OFFSET_DISPCNT) & ~DISPCNT_ALL_BG_AND_MODE_BITS) | sGpuBgConfigs.bgVisibilityAndMode);
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}
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void SetTextModeAndHideBgs(void)
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{
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SetGpuReg(REG_OFFSET_DISPCNT, GetGpuReg(REG_OFFSET_DISPCNT) & ~DISPCNT_ALL_BG_AND_MODE_BITS);
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}
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static void SetBgAffineInternal(u8 bg, s32 srcCenterX, s32 srcCenterY, s16 dispCenterX, s16 dispCenterY, s16 scaleX, s16 scaleY, u16 rotationAngle)
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{
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struct BgAffineSrcData src;
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struct BgAffineDstData dest;
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switch (sGpuBgConfigs.bgVisibilityAndMode & 0x7)
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{
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default:
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case 0:
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return;
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case 1:
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if (bg != 2)
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return;
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break;
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case 2:
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if (bg != 2 && bg != 3)
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return;
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break;
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}
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src.texX = srcCenterX;
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src.texY = srcCenterY;
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src.scrX = dispCenterX;
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src.scrY = dispCenterY;
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src.sx = scaleX;
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src.sy = scaleY;
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src.alpha = rotationAngle;
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BgAffineSet(&src, &dest, 1);
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SetGpuReg(REG_OFFSET_BG2PA, dest.pa);
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SetGpuReg(REG_OFFSET_BG2PB, dest.pb);
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SetGpuReg(REG_OFFSET_BG2PC, dest.pc);
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SetGpuReg(REG_OFFSET_BG2PD, dest.pd);
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SetGpuReg(REG_OFFSET_BG2PA, dest.pa);
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SetGpuReg(REG_OFFSET_BG2X_L, (s16)(dest.dx));
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SetGpuReg(REG_OFFSET_BG2X_H, (s16)(dest.dx >> 16));
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SetGpuReg(REG_OFFSET_BG2Y_L, (s16)(dest.dy));
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SetGpuReg(REG_OFFSET_BG2Y_H, (s16)(dest.dy >> 16));
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}
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bool8 IsInvalidBg(u8 bg)
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{
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if (bg >= NUM_BACKGROUNDS)
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return TRUE;
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else
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return FALSE;
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}
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// From FRLG. Dummied out.
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int BgTileAllocOp(int bg, int offset, int count, int mode)
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{
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return 0;
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}
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void ResetBgsAndClearDma3BusyFlags(u32 leftoverFireRedLeafGreenVariable)
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{
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int i;
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ResetBgs();
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for (i = 0; i < NUM_BACKGROUNDS; i++)
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{
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sDmaBusyBitfield[i] = 0;
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}
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gWindowTileAutoAllocEnabled = leftoverFireRedLeafGreenVariable;
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}
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void InitBgsFromTemplates(u8 bgMode, const struct BgTemplate *templates, u8 numTemplates)
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{
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int i;
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u8 bg;
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SetBgModeInternal(bgMode);
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ResetBgControlStructs();
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for (i = 0; i < numTemplates; i++)
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{
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bg = templates[i].bg;
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if (bg < NUM_BACKGROUNDS)
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{
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SetBgControlAttributes(bg,
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templates[i].charBaseIndex,
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templates[i].mapBaseIndex,
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templates[i].screenSize,
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templates[i].paletteMode,
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templates[i].priority,
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0,
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0);
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sGpuBgConfigs2[bg].baseTile = templates[i].baseTile;
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sGpuBgConfigs2[bg].basePalette = 0;
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sGpuBgConfigs2[bg].unk_3 = 0;
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sGpuBgConfigs2[bg].tilemap = NULL;
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sGpuBgConfigs2[bg].bg_x = 0;
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sGpuBgConfigs2[bg].bg_y = 0;
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}
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}
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}
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void InitBgFromTemplate(const struct BgTemplate *template)
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{
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u8 bg = template->bg;
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if (bg < NUM_BACKGROUNDS)
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{
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SetBgControlAttributes(bg,
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template->charBaseIndex,
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template->mapBaseIndex,
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template->screenSize,
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template->paletteMode,
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template->priority,
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0,
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0);
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sGpuBgConfigs2[bg].baseTile = template->baseTile;
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sGpuBgConfigs2[bg].basePalette = 0;
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sGpuBgConfigs2[bg].unk_3 = 0;
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sGpuBgConfigs2[bg].tilemap = NULL;
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sGpuBgConfigs2[bg].bg_x = 0;
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sGpuBgConfigs2[bg].bg_y = 0;
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}
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}
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void SetBgMode(u8 bgMode)
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{
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SetBgModeInternal(bgMode);
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}
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u16 LoadBgTiles(u8 bg, const void* src, u16 size, u16 destOffset)
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{
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u16 tileOffset;
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u8 cursor;
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if (GetBgControlAttribute(bg, BG_CTRL_ATTR_PALETTEMODE) == 0)
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{
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tileOffset = (sGpuBgConfigs2[bg].baseTile + destOffset) * 0x20;
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}
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else
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{
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tileOffset = (sGpuBgConfigs2[bg].baseTile + destOffset) * 0x40;
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}
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cursor = LoadBgVram(bg, src, size, tileOffset, DISPCNT_MODE_1);
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if (cursor == 0xFF)
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{
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return -1;
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}
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sDmaBusyBitfield[cursor / 0x20] |= (1 << (cursor % 0x20));
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if (gWindowTileAutoAllocEnabled == TRUE)
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BgTileAllocOp(bg, tileOffset / 0x20, size / 0x20, 1);
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return cursor;
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}
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u16 LoadBgTilemap(u8 bg, const void *src, u16 size, u16 destOffset)
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{
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u8 cursor = LoadBgVram(bg, src, size, destOffset * 2, DISPCNT_MODE_2);
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if (cursor == 0xFF)
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{
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return -1;
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}
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sDmaBusyBitfield[cursor / 0x20] |= (1 << (cursor % 0x20));
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return cursor;
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}
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u16 Unused_LoadBgPalette(u8 bg, const void *src, u16 size, u16 destOffset)
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{
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s8 cursor;
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if (!IsInvalidBg32(bg))
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{
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u16 paletteOffset = (sGpuBgConfigs2[bg].basePalette * 0x20) + (destOffset * 2);
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cursor = RequestDma3Copy(src, (void*)(paletteOffset + BG_PLTT), size, 0);
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if (cursor == -1)
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{
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return -1;
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}
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}
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else
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{
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return -1;
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}
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sDmaBusyBitfield[cursor / 0x20] |= (1 << (cursor % 0x20));
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return (u8)cursor;
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}
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bool8 IsDma3ManagerBusyWithBgCopy(void)
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{
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int i;
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for (i = 0; i < 0x80; i++)
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{
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u8 div = i / 0x20;
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u8 mod = i % 0x20;
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if ((sDmaBusyBitfield[div] & (1 << mod)))
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{
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s8 reqSpace = CheckForSpaceForDma3Request(i);
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if (reqSpace == -1)
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{
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return TRUE;
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}
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sDmaBusyBitfield[div] &= ~(1 << mod);
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}
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}
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return FALSE;
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}
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void ShowBg(u8 bg)
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{
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ShowBgInternal(bg);
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SyncBgVisibilityAndMode();
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}
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void HideBg(u8 bg)
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{
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HideBgInternal(bg);
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SyncBgVisibilityAndMode();
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}
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void SetBgAttribute(u8 bg, u8 attributeId, u8 value)
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{
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switch (attributeId)
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{
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case BG_ATTR_CHARBASEINDEX:
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SetBgControlAttributes(bg, value, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
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break;
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case BG_ATTR_MAPBASEINDEX:
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SetBgControlAttributes(bg, 0xFF, value, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
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break;
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case BG_ATTR_SCREENSIZE:
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SetBgControlAttributes(bg, 0xFF, 0xFF, value, 0xFF, 0xFF, 0xFF, 0xFF);
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break;
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case BG_ATTR_PALETTEMODE:
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SetBgControlAttributes(bg, 0xFF, 0xFF, 0xFF, value, 0xFF, 0xFF, 0xFF);
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break;
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case BG_ATTR_PRIORITY:
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SetBgControlAttributes(bg, 0xFF, 0xFF, 0xFF, 0xFF, value, 0xFF, 0xFF);
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break;
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case BG_ATTR_MOSAIC:
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SetBgControlAttributes(bg, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, value, 0xFF);
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break;
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case BG_ATTR_WRAPAROUND:
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SetBgControlAttributes(bg, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, value);
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break;
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}
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}
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u16 GetBgAttribute(u8 bg, u8 attributeId)
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{
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switch (attributeId)
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{
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case BG_ATTR_CHARBASEINDEX:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_CHARBASEINDEX);
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case BG_ATTR_MAPBASEINDEX:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_MAPBASEINDEX);
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case BG_ATTR_SCREENSIZE:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_SCREENSIZE);
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case BG_ATTR_PALETTEMODE:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_PALETTEMODE);
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case BG_ATTR_PRIORITY:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_PRIORITY);
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case BG_ATTR_MOSAIC:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_MOSAIC);
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case BG_ATTR_WRAPAROUND:
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return GetBgControlAttribute(bg, BG_CTRL_ATTR_WRAPAROUND);
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case BG_ATTR_METRIC:
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switch (GetBgType(bg))
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{
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case BG_TYPE_NORMAL:
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return GetBgMetricTextMode(bg, 0) * 0x800;
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case BG_TYPE_AFFINE:
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return GetBgMetricAffineMode(bg, 0) * 0x100;
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default:
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return 0;
|
|
}
|
|
case BG_ATTR_TYPE:
|
|
return GetBgType(bg);
|
|
case BG_ATTR_BASETILE:
|
|
return sGpuBgConfigs2[bg].baseTile;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
s32 ChangeBgX(u8 bg, s32 value, u8 op)
|
|
{
|
|
u8 mode;
|
|
u16 temp1;
|
|
u16 temp2;
|
|
|
|
if (IsInvalidBg32(bg) || !GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
switch (op)
|
|
{
|
|
case BG_COORD_SET:
|
|
default:
|
|
sGpuBgConfigs2[bg].bg_x = value;
|
|
break;
|
|
case BG_COORD_ADD:
|
|
sGpuBgConfigs2[bg].bg_x += value;
|
|
break;
|
|
case BG_COORD_SUB:
|
|
sGpuBgConfigs2[bg].bg_x -= value;
|
|
break;
|
|
}
|
|
|
|
mode = GetBgMode();
|
|
|
|
switch (bg)
|
|
{
|
|
case 0:
|
|
temp1 = sGpuBgConfigs2[0].bg_x >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG0HOFS, temp1);
|
|
break;
|
|
case 1:
|
|
temp1 = sGpuBgConfigs2[1].bg_x >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG1HOFS, temp1);
|
|
break;
|
|
case 2:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_x >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG2HOFS, temp1);
|
|
}
|
|
else
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_x >> 0x10;
|
|
temp2 = sGpuBgConfigs2[2].bg_x & 0xFFFF;
|
|
SetGpuReg(REG_OFFSET_BG2X_H, temp1);
|
|
SetGpuReg(REG_OFFSET_BG2X_L, temp2);
|
|
}
|
|
break;
|
|
case 3:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_x >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG3HOFS, temp1);
|
|
}
|
|
else if (mode == 2)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_x >> 0x10;
|
|
temp2 = sGpuBgConfigs2[3].bg_x & 0xFFFF;
|
|
SetGpuReg(REG_OFFSET_BG3X_H, temp1);
|
|
SetGpuReg(REG_OFFSET_BG3X_L, temp2);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return sGpuBgConfigs2[bg].bg_x;
|
|
}
|
|
|
|
s32 GetBgX(u8 bg)
|
|
{
|
|
if (IsInvalidBg32(bg))
|
|
return -1;
|
|
else if (!GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
return -1;
|
|
else
|
|
return sGpuBgConfigs2[bg].bg_x;
|
|
}
|
|
|
|
s32 ChangeBgY(u8 bg, s32 value, u8 op)
|
|
{
|
|
u8 mode;
|
|
u16 temp1;
|
|
u16 temp2;
|
|
|
|
if (IsInvalidBg32(bg) || !GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
switch (op)
|
|
{
|
|
case BG_COORD_SET:
|
|
default:
|
|
sGpuBgConfigs2[bg].bg_y = value;
|
|
break;
|
|
case BG_COORD_ADD:
|
|
sGpuBgConfigs2[bg].bg_y += value;
|
|
break;
|
|
case BG_COORD_SUB:
|
|
sGpuBgConfigs2[bg].bg_y -= value;
|
|
break;
|
|
}
|
|
|
|
mode = GetBgMode();
|
|
|
|
switch (bg)
|
|
{
|
|
case 0:
|
|
temp1 = sGpuBgConfigs2[0].bg_y >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG0VOFS, temp1);
|
|
break;
|
|
case 1:
|
|
temp1 = sGpuBgConfigs2[1].bg_y >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG1VOFS, temp1);
|
|
break;
|
|
case 2:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_y >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG2VOFS, temp1);
|
|
}
|
|
else
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_y >> 0x10;
|
|
temp2 = sGpuBgConfigs2[2].bg_y & 0xFFFF;
|
|
SetGpuReg(REG_OFFSET_BG2Y_H, temp1);
|
|
SetGpuReg(REG_OFFSET_BG2Y_L, temp2);
|
|
}
|
|
break;
|
|
case 3:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_y >> 0x8;
|
|
SetGpuReg(REG_OFFSET_BG3VOFS, temp1);
|
|
}
|
|
else if (mode == 2)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_y >> 0x10;
|
|
temp2 = sGpuBgConfigs2[3].bg_y & 0xFFFF;
|
|
SetGpuReg(REG_OFFSET_BG3Y_H, temp1);
|
|
SetGpuReg(REG_OFFSET_BG3Y_L, temp2);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return sGpuBgConfigs2[bg].bg_y;
|
|
}
|
|
|
|
s32 ChangeBgY_ScreenOff(u8 bg, s32 value, u8 op)
|
|
{
|
|
u8 mode;
|
|
u16 temp1;
|
|
u16 temp2;
|
|
|
|
if (IsInvalidBg32(bg) || !GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
switch (op)
|
|
{
|
|
case BG_COORD_SET:
|
|
default:
|
|
sGpuBgConfigs2[bg].bg_y = value;
|
|
break;
|
|
case BG_COORD_ADD:
|
|
sGpuBgConfigs2[bg].bg_y += value;
|
|
break;
|
|
case BG_COORD_SUB:
|
|
sGpuBgConfigs2[bg].bg_y -= value;
|
|
break;
|
|
}
|
|
|
|
mode = GetBgMode();
|
|
|
|
switch (bg)
|
|
{
|
|
case 0:
|
|
temp1 = sGpuBgConfigs2[0].bg_y >> 0x8;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG0VOFS, temp1);
|
|
break;
|
|
case 1:
|
|
temp1 = sGpuBgConfigs2[1].bg_y >> 0x8;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG1VOFS, temp1);
|
|
break;
|
|
case 2:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_y >> 0x8;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG2VOFS, temp1);
|
|
|
|
}
|
|
else
|
|
{
|
|
temp1 = sGpuBgConfigs2[2].bg_y >> 0x10;
|
|
temp2 = sGpuBgConfigs2[2].bg_y & 0xFFFF;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG2Y_H, temp1);
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG2Y_L, temp2);
|
|
}
|
|
break;
|
|
case 3:
|
|
if (mode == 0)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_y >> 0x8;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG3VOFS, temp1);
|
|
}
|
|
else if (mode == 2)
|
|
{
|
|
temp1 = sGpuBgConfigs2[3].bg_y >> 0x10;
|
|
temp2 = sGpuBgConfigs2[3].bg_y & 0xFFFF;
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG3Y_H, temp1);
|
|
SetGpuReg_ForcedBlank(REG_OFFSET_BG3Y_L, temp2);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return sGpuBgConfigs2[bg].bg_y;
|
|
}
|
|
|
|
s32 GetBgY(u8 bg)
|
|
{
|
|
if (IsInvalidBg32(bg))
|
|
return -1;
|
|
else if (!GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
return -1;
|
|
else
|
|
return sGpuBgConfigs2[bg].bg_y;
|
|
}
|
|
|
|
void SetBgAffine(u8 bg, s32 srcCenterX, s32 srcCenterY, s16 dispCenterX, s16 dispCenterY, s16 scaleX, s16 scaleY, u16 rotationAngle)
|
|
{
|
|
SetBgAffineInternal(bg, srcCenterX, srcCenterY, dispCenterX, dispCenterY, scaleX, scaleY, rotationAngle);
|
|
}
|
|
|
|
u8 Unused_AdjustBgMosaic(u8 a1, u8 a2)
|
|
{
|
|
u16 result = GetGpuReg(REG_OFFSET_MOSAIC);
|
|
s16 test1 = result & 0xF;
|
|
s16 test2 = (result >> 4) & 0xF;
|
|
|
|
result &= 0xFF00;
|
|
|
|
switch (a2)
|
|
{
|
|
case 0:
|
|
default:
|
|
test1 = a1 & 0xF;
|
|
test2 = a1 >> 0x4;
|
|
break;
|
|
case 1:
|
|
test1 = a1 & 0xF;
|
|
break;
|
|
case 2:
|
|
if ((test1 + a1) > 0xF)
|
|
{
|
|
test1 = 0xF;
|
|
}
|
|
else
|
|
{
|
|
test1 += a1;
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((test1 - a1) < 0)
|
|
{
|
|
test1 = 0x0;
|
|
}
|
|
else
|
|
{
|
|
test1 -= a1;
|
|
}
|
|
break;
|
|
case 4:
|
|
test2 = a1 & 0xF;
|
|
break;
|
|
case 5:
|
|
if ((test2 + a1) > 0xF)
|
|
{
|
|
test2 = 0xF;
|
|
}
|
|
else
|
|
{
|
|
test2 += a1;
|
|
}
|
|
break;
|
|
case 6:
|
|
if ((test2 - a1) < 0)
|
|
{
|
|
test2 = 0x0;
|
|
}
|
|
else
|
|
{
|
|
test2 -= a1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
result |= ((test2 << 0x4) & 0xF0);
|
|
result |= (test1 & 0xF);
|
|
|
|
SetGpuReg(REG_OFFSET_MOSAIC, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
void SetBgTilemapBuffer(u8 bg, void *tilemap)
|
|
{
|
|
if (!IsInvalidBg32(bg) && GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
{
|
|
sGpuBgConfigs2[bg].tilemap = tilemap;
|
|
}
|
|
}
|
|
|
|
void UnsetBgTilemapBuffer(u8 bg)
|
|
{
|
|
if (!IsInvalidBg32(bg) && GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
{
|
|
sGpuBgConfigs2[bg].tilemap = NULL;
|
|
}
|
|
}
|
|
|
|
void* GetBgTilemapBuffer(u8 bg)
|
|
{
|
|
if (IsInvalidBg32(bg))
|
|
return NULL;
|
|
else if (!GetBgControlAttribute(bg, BG_CTRL_ATTR_VISIBLE))
|
|
return NULL;
|
|
else
|
|
return sGpuBgConfigs2[bg].tilemap;
|
|
}
|
|
|
|
void CopyToBgTilemapBuffer(u8 bg, const void *src, u16 mode, u16 destOffset)
|
|
{
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
if (mode != 0)
|
|
CpuCopy16(src, (void *)(sGpuBgConfigs2[bg].tilemap + (destOffset * 2)), mode);
|
|
else
|
|
LZ77UnCompWram(src, (void *)(sGpuBgConfigs2[bg].tilemap + (destOffset * 2)));
|
|
}
|
|
}
|
|
|
|
void CopyBgTilemapBufferToVram(u8 bg)
|
|
{
|
|
u16 sizeToLoad;
|
|
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
switch (GetBgType(bg))
|
|
{
|
|
case BG_TYPE_NORMAL:
|
|
sizeToLoad = GetBgMetricTextMode(bg, 0) * 0x800;
|
|
break;
|
|
case BG_TYPE_AFFINE:
|
|
sizeToLoad = GetBgMetricAffineMode(bg, 0) * 0x100;
|
|
break;
|
|
default:
|
|
sizeToLoad = 0;
|
|
break;
|
|
}
|
|
LoadBgVram(bg, sGpuBgConfigs2[bg].tilemap, sizeToLoad, 0, 2);
|
|
}
|
|
}
|
|
|
|
void CopyToBgTilemapBufferRect(u8 bg, const void* src, u8 destX, u8 destY, u8 width, u8 height)
|
|
{
|
|
u16 destX16;
|
|
u16 destY16;
|
|
u16 mode;
|
|
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
switch (GetBgType(bg))
|
|
{
|
|
case BG_TYPE_NORMAL:
|
|
{
|
|
const u16 * srcCopy = src;
|
|
for (destY16 = destY; destY16 < (destY + height); destY16++)
|
|
{
|
|
for (destX16 = destX; destX16 < (destX + width); destX16++)
|
|
{
|
|
((u16*)sGpuBgConfigs2[bg].tilemap)[((destY16 * 0x20) + destX16)] = *srcCopy++;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case BG_TYPE_AFFINE:
|
|
{
|
|
const u8 * srcCopy = src;
|
|
mode = GetBgMetricAffineMode(bg, 0x1);
|
|
for (destY16 = destY; destY16 < (destY + height); destY16++)
|
|
{
|
|
for (destX16 = destX; destX16 < (destX + width); destX16++)
|
|
{
|
|
((u8*)sGpuBgConfigs2[bg].tilemap)[((destY16 * mode) + destX16)] = *srcCopy++;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void CopyToBgTilemapBufferRect_ChangePalette(u8 bg, const void *src, u8 destX, u8 destY, u8 rectWidth, u8 rectHeight, u8 palette)
|
|
{
|
|
CopyRectToBgTilemapBufferRect(bg, src, 0, 0, rectWidth, rectHeight, destX, destY, rectWidth, rectHeight, palette, 0, 0);
|
|
}
|
|
|
|
void CopyRectToBgTilemapBufferRect(u8 bg, const void *src, u8 srcX, u8 srcY, u8 srcWidth, u8 srcHeight, u8 destX, u8 destY, u8 rectWidth, u8 rectHeight, u8 palette1, s16 tileOffset, s16 palette2)
|
|
{
|
|
u16 screenWidth, screenHeight, screenSize;
|
|
u16 var;
|
|
const void *srcPtr;
|
|
u16 i, j;
|
|
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
screenSize = GetBgControlAttribute(bg, BG_CTRL_ATTR_SCREENSIZE);
|
|
screenWidth = GetBgMetricTextMode(bg, 0x1) * 0x20;
|
|
screenHeight = GetBgMetricTextMode(bg, 0x2) * 0x20;
|
|
switch (GetBgType(bg))
|
|
{
|
|
case BG_TYPE_NORMAL:
|
|
srcPtr = src + ((srcY * srcWidth) + srcX) * 2;
|
|
for (i = destY; i < (destY + rectHeight); i++)
|
|
{
|
|
for (j = destX; j < (destX + rectWidth); j++)
|
|
{
|
|
u16 index = GetTileMapIndexFromCoords(j, i, screenSize, screenWidth, screenHeight);
|
|
CopyTileMapEntry(srcPtr, sGpuBgConfigs2[bg].tilemap + (index * 2), palette1, tileOffset, palette2);
|
|
srcPtr += 2;
|
|
}
|
|
srcPtr += (srcWidth - rectWidth) * 2;
|
|
}
|
|
break;
|
|
case BG_TYPE_AFFINE:
|
|
srcPtr = src + ((srcY * srcWidth) + srcX);
|
|
var = GetBgMetricAffineMode(bg, 0x1);
|
|
for (i = destY; i < (destY + rectHeight); i++)
|
|
{
|
|
for (j = destX; j < (destX + rectWidth); j++)
|
|
{
|
|
*(u8*)(sGpuBgConfigs2[bg].tilemap + ((var * i) + j)) = *(u8*)(srcPtr) + tileOffset;
|
|
srcPtr++;
|
|
}
|
|
srcPtr += (srcWidth - rectWidth);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void FillBgTilemapBufferRect_Palette0(u8 bg, u16 tileNum, u8 x, u8 y, u8 width, u8 height)
|
|
{
|
|
u16 x16;
|
|
u16 y16;
|
|
u16 mode;
|
|
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
switch (GetBgType(bg))
|
|
{
|
|
case BG_TYPE_NORMAL:
|
|
for (y16 = y; y16 < (y + height); y16++)
|
|
{
|
|
for (x16 = x; x16 < (x + width); x16++)
|
|
{
|
|
((u16*)sGpuBgConfigs2[bg].tilemap)[((y16 * 0x20) + x16)] = tileNum;
|
|
}
|
|
}
|
|
break;
|
|
case BG_TYPE_AFFINE:
|
|
mode = GetBgMetricAffineMode(bg, 0x1);
|
|
for (y16 = y; y16 < (y + height); y16++)
|
|
{
|
|
for (x16 = x; x16 < (x + width); x16++)
|
|
{
|
|
((u8*)sGpuBgConfigs2[bg].tilemap)[((y16 * mode) + x16)] = tileNum;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void FillBgTilemapBufferRect(u8 bg, u16 tileNum, u8 x, u8 y, u8 width, u8 height, u8 palette)
|
|
{
|
|
WriteSequenceToBgTilemapBuffer(bg, tileNum, x, y, width, height, palette, 0);
|
|
}
|
|
|
|
void WriteSequenceToBgTilemapBuffer(u8 bg, u16 firstTileNum, u8 x, u8 y, u8 width, u8 height, u8 paletteSlot, s16 tileNumDelta)
|
|
{
|
|
u16 mode;
|
|
u16 mode2;
|
|
u16 attribute;
|
|
u16 mode3;
|
|
u16 x16, y16;
|
|
|
|
if (!IsInvalidBg32(bg) && !IsTileMapOutsideWram(bg))
|
|
{
|
|
attribute = GetBgControlAttribute(bg, BG_CTRL_ATTR_SCREENSIZE);
|
|
mode = GetBgMetricTextMode(bg, 0x1) * 0x20;
|
|
mode2 = GetBgMetricTextMode(bg, 0x2) * 0x20;
|
|
switch (GetBgType(bg))
|
|
{
|
|
case BG_TYPE_NORMAL:
|
|
for (y16 = y; y16 < (y + height); y16++)
|
|
{
|
|
for (x16 = x; x16 < (x + width); x16++)
|
|
{
|
|
CopyTileMapEntry(&firstTileNum, &((u16*)sGpuBgConfigs2[bg].tilemap)[(u16)GetTileMapIndexFromCoords(x16, y16, attribute, mode, mode2)], paletteSlot, 0, 0);
|
|
firstTileNum = (firstTileNum & (METATILE_COLLISION_MASK | METATILE_ELEVATION_MASK)) + ((firstTileNum + tileNumDelta) & METATILE_ID_MASK);
|
|
}
|
|
}
|
|
break;
|
|
case BG_TYPE_AFFINE:
|
|
mode3 = GetBgMetricAffineMode(bg, 0x1);
|
|
for (y16 = y; y16 < (y + height); y16++)
|
|
{
|
|
for (x16 = x; x16 < (x + width); x16++)
|
|
{
|
|
((u8*)sGpuBgConfigs2[bg].tilemap)[(y16 * mode3) + x16] = firstTileNum;
|
|
firstTileNum = (firstTileNum & (METATILE_COLLISION_MASK | METATILE_ELEVATION_MASK)) + ((firstTileNum + tileNumDelta) & METATILE_ID_MASK);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
u16 GetBgMetricTextMode(u8 bg, u8 whichMetric)
|
|
{
|
|
u8 screenSize = GetBgControlAttribute(bg, BG_CTRL_ATTR_SCREENSIZE);
|
|
|
|
switch (whichMetric)
|
|
{
|
|
case 0:
|
|
switch (screenSize)
|
|
{
|
|
case 0:
|
|
return 1;
|
|
case 1:
|
|
case 2:
|
|
return 2;
|
|
case 3:
|
|
return 4;
|
|
}
|
|
break;
|
|
case 1:
|
|
switch (screenSize)
|
|
{
|
|
case 0:
|
|
return 1;
|
|
case 1:
|
|
return 2;
|
|
case 2:
|
|
return 1;
|
|
case 3:
|
|
return 2;
|
|
}
|
|
break;
|
|
case 2:
|
|
switch (screenSize)
|
|
{
|
|
case 0:
|
|
case 1:
|
|
return 1;
|
|
case 2:
|
|
case 3:
|
|
return 2;
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
u32 GetBgMetricAffineMode(u8 bg, u8 whichMetric)
|
|
{
|
|
u8 screenSize = GetBgControlAttribute(bg, BG_CTRL_ATTR_SCREENSIZE);
|
|
|
|
switch (whichMetric)
|
|
{
|
|
case 0:
|
|
switch (screenSize)
|
|
{
|
|
case 0:
|
|
return 0x1;
|
|
case 1:
|
|
return 0x4;
|
|
case 2:
|
|
return 0x10;
|
|
case 3:
|
|
return 0x40;
|
|
}
|
|
break;
|
|
case 1:
|
|
case 2:
|
|
return 0x10 << screenSize;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
u32 GetTileMapIndexFromCoords(s32 x, s32 y, s32 screenSize, u32 screenWidth, u32 screenHeight)
|
|
{
|
|
x = x & (screenWidth - 1);
|
|
y = y & (screenHeight - 1);
|
|
|
|
switch (screenSize)
|
|
{
|
|
case 0:
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
if (y >= 0x20)
|
|
y += 0x20;
|
|
case 1:
|
|
if (x >= 0x20)
|
|
{
|
|
x -= 0x20;
|
|
y += 0x20;
|
|
}
|
|
break;
|
|
}
|
|
return (y * 0x20) + x;
|
|
}
|
|
|
|
void CopyTileMapEntry(const u16 *src, u16 *dest, s32 palette1, s32 tileOffset, s32 palette2)
|
|
{
|
|
u16 var;
|
|
|
|
switch (palette1)
|
|
{
|
|
case 0 ... 15:
|
|
var = ((*src + tileOffset) & 0xFFF) + ((palette1 + palette2) << 12);
|
|
break;
|
|
case 16:
|
|
var = *dest;
|
|
var &= 0xFC00;
|
|
var += palette2 << 12;
|
|
var |= (*src + tileOffset) & 0x3FF;
|
|
break;
|
|
default:
|
|
case 17 ... INT_MAX:
|
|
var = *src + tileOffset + (palette2 << 12);
|
|
break;
|
|
}
|
|
*dest = var;
|
|
}
|
|
|
|
static u32 GetBgType(u8 bg)
|
|
{
|
|
u8 mode = GetBgMode();
|
|
|
|
switch (bg)
|
|
{
|
|
case 0:
|
|
case 1:
|
|
switch (mode)
|
|
{
|
|
case 0:
|
|
case 1:
|
|
return BG_TYPE_NORMAL;
|
|
}
|
|
break;
|
|
case 2:
|
|
switch (mode)
|
|
{
|
|
case 0:
|
|
return BG_TYPE_NORMAL;
|
|
case 1:
|
|
case 2:
|
|
return BG_TYPE_AFFINE;
|
|
}
|
|
break;
|
|
case 3:
|
|
switch (mode)
|
|
{
|
|
case 0:
|
|
return BG_TYPE_NORMAL;
|
|
case 2:
|
|
return BG_TYPE_AFFINE;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return BG_TYPE_NONE;
|
|
}
|
|
|
|
bool32 IsInvalidBg32(u8 bg)
|
|
{
|
|
if (bg >= NUM_BACKGROUNDS)
|
|
return TRUE;
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
bool32 IsTileMapOutsideWram(u8 bg)
|
|
{
|
|
if (sGpuBgConfigs2[bg].tilemap > (void*)IWRAM_END)
|
|
return TRUE;
|
|
else if (sGpuBgConfigs2[bg].tilemap == NULL)
|
|
return TRUE;
|
|
else
|
|
return FALSE;
|
|
}
|