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shift support

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ManIsCat2 2026-01-06 16:53:21 +03:30
parent 6092488d1c
commit 67b62d9861
2 changed files with 21 additions and 0 deletions
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1
src/pc/gfx/gfx.h
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@ -67,6 +67,7 @@ struct TextureTile {
uint8_t fmt;
uint8_t siz;
uint8_t cms, cmt;
uint8_t shifts, shiftt;
uint16_t uls, ult, lrs, lrt; // U10.2
uint32_t line_size_bytes;
};

20
src/pc/gfx/gfx_pc.c
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@ -1166,6 +1166,24 @@ static void OPTIMIZE_O3 gfx_sp_tri1(uint8_t vtx1_idx, uint8_t vtx2_idx, uint8_t
if (use_texture) {
float u = (v_arr[i]->u - rdp.texture_tile.uls * 8) / 32.0f;
float v = (v_arr[i]->v - rdp.texture_tile.ult * 8) / 32.0f;
int shifts = rdp.texture_tile.shifts;
int shiftt = rdp.texture_tile.shiftt;
if (shifts != 0) {
if (shifts <= 10) {
u /= 1 << shifts;
} else {
u *= 1 << (16 - shifts);
}
}
if (shiftt != 0) {
if (shiftt <= 10) {
v /= 1 << shiftt;
} else {
v *= 1 << (16 - shiftt);
}
}
if ((rdp.other_mode_h & (3U << G_MDSFT_TEXTFILT)) != G_TF_POINT) {
// Linear filter adds 0.5f to the coordinates (why?)
u += 0.5f;
@ -1404,6 +1422,8 @@ static void gfx_dp_set_tile(uint8_t fmt, uint32_t siz, uint32_t line, uint32_t t
rdp.texture_tile.siz = siz;
rdp.texture_tile.cms = cms;
rdp.texture_tile.cmt = cmt;
rdp.texture_tile.shifts = shifts;
rdp.texture_tile.shiftt = shiftt;
rdp.texture_tile.line_size_bytes = line * 8;
if (!sOnlyTextureChangeOnAddrChange) {
// I don't know if we ever need to set these...