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[DXBC] New tfetch: pre-swizzle signs, additive LOD + refactoring

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Triang3l
2020-06-06 19:12:34 +03:00
parent 68dd818029
commit 8a64861ec0
43 changed files with 4018 additions and 4903 deletions
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39
src/xenia/gpu/texture_util.cc
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@@ -340,40 +340,43 @@ int32_t GetTiledOffset3D(int32_t x, int32_t y, int32_t z, uint32_t width,
return address;
}
uint32_t SwizzleSigns(const xenos::xe_gpu_texture_fetch_t& fetch,
bool* any_unsigned_out, bool* any_signed_out) {
uint32_t signs = 0;
bool any_unsigned = false, any_signed = false;
uint8_t SwizzleSigns(const xenos::xe_gpu_texture_fetch_t& fetch) {
uint8_t signs = 0;
bool any_not_signed = false, any_signed = false;
// 0b00 or 0b01 for each component, whether it's constant 0/1.
uint32_t constant_mask = 0b00000000;
uint8_t constant_mask = 0b00000000;
for (uint32_t i = 0; i < 4; ++i) {
uint32_t swizzle = (fetch.swizzle >> (i * 3)) & 0b111;
if (swizzle & 0b100) {
constant_mask |= 1 << (i * 2);
constant_mask |= uint8_t(1) << (i * 2);
} else {
TextureSign sign =
TextureSign((fetch.dword_0 >> (2 + swizzle * 2)) & 0b11);
signs |= uint32_t(sign) << (i * 2);
signs |= uint8_t(sign) << (i * 2);
if (sign == TextureSign::kSigned) {
any_signed = true;
} else {
any_unsigned = true;
any_not_signed = true;
}
}
}
if (any_signed && !any_unsigned) {
TextureSign constants_sign = TextureSign::kUnsigned;
if (constant_mask == 0b01010101) {
// If only constant components, choose according to the original format
// (what would more likely be loaded if there were non-constant components).
// If all components would be signed, use signed.
if (((fetch.dword_0 >> 2) & 0b11111111) ==
uint32_t(TextureSign::kSigned) * 0b01010101) {
constants_sign = TextureSign::kSigned;
}
} else {
// If only signed and constant components, reading just from the signed host
// view is enough.
signs |= uint32_t(TextureSign::kSigned) * constant_mask;
} else {
signs |= uint32_t(TextureSign::kUnsigned) * constant_mask;
}
if (any_unsigned_out) {
*any_unsigned_out = any_unsigned;
}
if (any_signed_out) {
*any_signed_out = any_signed;
if (any_signed && !any_not_signed) {
constants_sign = TextureSign::kSigned;
}
}
signs |= uint8_t(constants_sign) * constant_mask;
return signs;
}