diff options
Diffstat (limited to 'src/util.c')
| -rw-r--r-- | src/util.c | 218 |
1 files changed, 177 insertions, 41 deletions
diff --git a/src/util.c b/src/util.c index c83fe8c8a..582b9f806 100644 --- a/src/util.c +++ b/src/util.c @@ -1,27 +1,140 @@ #include "global.h" #include "util.h" -extern const struct SpriteTemplate gInvisibleSpriteTemplate; -extern const u8 gSpriteDimensions[3][4][2]; -extern const u16 gCrc16Table[]; +const u32 gBitTable[] = +{ + 1 << 0, + 1 << 1, + 1 << 2, + 1 << 3, + 1 << 4, + 1 << 5, + 1 << 6, + 1 << 7, + 1 << 8, + 1 << 9, + 1 << 10, + 1 << 11, + 1 << 12, + 1 << 13, + 1 << 14, + 1 << 15, + 1 << 16, + 1 << 17, + 1 << 18, + 1 << 19, + 1 << 20, + 1 << 21, + 1 << 22, + 1 << 23, + 1 << 24, + 1 << 25, + 1 << 26, + 1 << 27, + 1 << 28, + 1 << 29, + 1 << 30, + 1 << 31, +}; -u8 CreateInvisibleSpriteWithCallback(void (*callback)(struct Sprite *)) { +static const struct SpriteTemplate gInvisibleSpriteTemplate = +{ + .tileTag = 0, + .paletteTag = 0, + .oam = &gDummyOamData, + .anims = gDummySpriteAnimTable, + .images = NULL, + .affineAnims = gDummySpriteAffineAnimTable, + .callback = SpriteCallbackDummy, +}; + +static const u8 gSpriteDimensions[3][4][2] = +{ + // square + { + {1, 1}, + {2, 2}, + {4, 4}, + {8, 8}, + }, + + // horizontal rectangle + { + {2, 1}, + {4, 1}, + {4, 2}, + {8, 4}, + }, + + // vertical rectangle + { + {1, 2}, + {1, 4}, + {2, 4}, + {4, 8}, + }, +}; + +static const u16 gCrc16Table[] = +{ + 0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF, + 0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7, + 0x1081, 0x0108, 0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E, + 0x9CC9, 0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64, 0xF9FF, 0xE876, + 0x2102, 0x308B, 0x0210, 0x1399, 0x6726, 0x76AF, 0x4434, 0x55BD, + 0xAD4A, 0xBCC3, 0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5, + 0x3183, 0x200A, 0x1291, 0x0318, 0x77A7, 0x662E, 0x54B5, 0x453C, + 0xBDCB, 0xAC42, 0x9ED9, 0x8F50, 0xFBEF, 0xEA66, 0xD8FD, 0xC974, + 0x4204, 0x538D, 0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB, + 0xCE4C, 0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1, 0xAB7A, 0xBAF3, + 0x5285, 0x430C, 0x7197, 0x601E, 0x14A1, 0x0528, 0x37B3, 0x263A, + 0xDECD, 0xCF44, 0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72, + 0x6306, 0x728F, 0x4014, 0x519D, 0x2522, 0x34AB, 0x0630, 0x17B9, + 0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5, 0xA96A, 0xB8E3, 0x8A78, 0x9BF1, + 0x7387, 0x620E, 0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738, + 0xFFCF, 0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862, 0x9AF9, 0x8B70, + 0x8408, 0x9581, 0xA71A, 0xB693, 0xC22C, 0xD3A5, 0xE13E, 0xF0B7, + 0x0840, 0x19C9, 0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF, + 0x9489, 0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324, 0xF1BF, 0xE036, + 0x18C1, 0x0948, 0x3BD3, 0x2A5A, 0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E, + 0xA50A, 0xB483, 0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5, + 0x2942, 0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF, 0x4C74, 0x5DFD, + 0xB58B, 0xA402, 0x9699, 0x8710, 0xF3AF, 0xE226, 0xD0BD, 0xC134, + 0x39C3, 0x284A, 0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C, + 0xC60C, 0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1, 0xA33A, 0xB2B3, + 0x4A44, 0x5BCD, 0x6956, 0x78DF, 0x0C60, 0x1DE9, 0x2F72, 0x3EFB, + 0xD68D, 0xC704, 0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232, + 0x5AC5, 0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68, 0x3FF3, 0x2E7A, + 0xE70E, 0xF687, 0xC41C, 0xD595, 0xA12A, 0xB0A3, 0x8238, 0x93B1, + 0x6B46, 0x7ACF, 0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9, + 0xF78F, 0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022, 0x92B9, 0x8330, + 0x7BC7, 0x6A4E, 0x58D5, 0x495C, 0x3DE3, 0x2C6A, 0x1EF1, 0x0F78, +}; + +const u8 gMiscBlank_Gfx[] = INCBIN_U8("graphics/interface/blank.4bpp"); + + +u8 CreateInvisibleSpriteWithCallback(void (*callback)(struct Sprite *)) +{ u8 sprite = CreateSprite(&gInvisibleSpriteTemplate, 248, 168, 14); gSprites[sprite].invisible = TRUE; gSprites[sprite].callback = callback; return sprite; } -void StoreWordInTwoHalfwords(u16 *h, u32 w) { +void StoreWordInTwoHalfwords(u16 *h, u32 w) +{ h[0] = (u16)(w); h[1] = (u16)(w >> 16); } -void LoadWordFromTwoHalfwords(u16 *h, u32 *w) { +void LoadWordFromTwoHalfwords(u16 *h, u32 *w) +{ *w = h[0] | (s16)h[1] << 16; } -void SetBgAffineStruct(struct BgAffineSrcData *src, u32 texX, u32 texY, s16 scrX, s16 scrY, s16 sx, s16 sy, u16 alpha) { +void SetBgAffineStruct(struct BgAffineSrcData *src, u32 texX, u32 texY, s16 scrX, s16 scrY, s16 sx, s16 sy, u16 alpha) +{ src->texX = texX; src->texY = texY; src->scrX = scrX; @@ -31,15 +144,11 @@ void SetBgAffineStruct(struct BgAffineSrcData *src, u32 texX, u32 texY, s16 scrX src->alpha = alpha; } -void DoBgAffineSet(struct BgAffineDstData *dest, u32 texX, u32 texY, s16 scrX, s16 scrY, s16 sx, s16 sy, u16 alpha) { +void DoBgAffineSet(struct BgAffineDstData *dest, u32 texX, u32 texY, s16 scrX, s16 scrY, s16 sx, s16 sy, u16 alpha) +{ struct BgAffineSrcData src; - SetBgAffineStruct( - &src, - texX, texY, - scrX, scrY, - sx, sy, - alpha - ); + + SetBgAffineStruct(&src, texX, texY, scrX, scrY, sx, sy, alpha); BgAffineSet(&src, dest, 1); } @@ -47,24 +156,34 @@ void DoBgAffineSet(struct BgAffineDstData *dest, u32 texX, u32 texY, s16 scrX, s // Functionally equivalent. // Only the two yflip loops don't match. -void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) { +void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) +{ u8 x, y; s8 i, j; u8 xflip[32]; u8 h = gSpriteDimensions[shape][size][1]; u8 w = gSpriteDimensions[shape][size][0]; - for (y = 0; y < h; y++) { + + for (y = 0; y < h; y++) + { int filler = 32 - w; - for (x = 0; x < w; x++) { + + for (x = 0; x < w; x++) + { int tile = (*tilemap & 0x3ff) * 32; int attr = *tilemap & 0xc00; - if (attr == 0) { + + if (attr == 0) + { void *src = tiles + tile; void *dest = output; int length = 32; DmaCopy32(3, src, dest, length); - } else if (attr == 0x800) { // yflip - for (i = 0; i < 8; i++) { + } + else if (attr == 0x800) // yflip + { + for (i = 0; i < 8; i++) + { void *src = tiles; void *dest = output; int length = 4; @@ -73,22 +192,30 @@ void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) { dest += i * 4; DmaCopy32(3, src, dest, length); } - } else { // xflip - for (i = 0; i < 8; i++) { - for (j = 0; j < 4; j++) { + } + else // xflip + { + for (i = 0; i < 8; i++) + { + for (j = 0; j < 4; j++) + { u8 i2 = i * 4; xflip[i2 + (3-j)] = (tiles[tile + i2 + j] & 0xf) << 4; xflip[i2 + (3-j)] |= tiles[tile + i2 + j] >> 4; } } - if (*tilemap & 0x800) { // yflip - for (i = 0; i < 8; i++) { + if (*tilemap & 0x800) // yflip + { + for (i = 0; i < 8; i++) + { void *src = xflip + (7-i) * 4; void *dest = output + i*4; int length = 4; DmaCopy32(3, src, dest, length); } - } else { + } + else + { void *src = xflip; void *dest = output; int length = 32; @@ -104,7 +231,8 @@ void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) { #else -__attribute__((naked)) void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) { +__attribute__((naked)) void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *tilemap, u8 *output) +{ asm("\n" " .syntax unified\n" " push {r4-r7,lr}\n" @@ -348,39 +476,47 @@ __attribute__((naked)) void CopySpriteTiles(u8 shape, u8 size, u8 *tiles, u16 *t #endif -int CountTrailingZeroBits(u32 value) { +int CountTrailingZeroBits(u32 value) +{ u8 i; - for (i = 0; i < 32; i++) { - if ((value & 1) == 0) { + + for (i = 0; i < 32; i++) + { + if ((value & 1) == 0) value >>= 1; - } else { + else return i; - } } return 0; } -u16 CalcCRC16(u8 *data, int length) { +u16 CalcCRC16(u8 *data, int length) +{ u16 i, j; u16 crc = 0x1121; - for (i = 0; i < length; i++) { + + for (i = 0; i < length; i++) + { crc ^= data[i]; - for (j = 0; j < 8; j++) { - if (crc & 1) { + for (j = 0; j < 8; j++) + { + if (crc & 1) crc = (crc >> 1) ^ 0x8408; - } else { + else crc >>= 1; - } } } return ~crc; } -u16 CalcCRC16WithTable(u8 *data, int length) { +u16 CalcCRC16WithTable(u8 *data, int length) +{ u16 i; u16 crc = 0x1121; u8 byte; - for (i = 0; i < length; i++) { + + for (i = 0; i < length; i++) + { byte = crc >> 8; crc ^= data[i]; crc = byte ^ gCrc16Table[(u8)crc]; |