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metal: implement texture decoder

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This commit is contained in:
Samuliak 2025-03-11 08:11:39 +01:00
parent c59ee99364
commit 3a654b3609
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11 changed files with 419 additions and 223 deletions
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28
include/renderer_mtl/mtl_texture.hpp
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@ -8,8 +8,9 @@
#include "boost/icl/interval.hpp"
#include "helpers.hpp"
#include "math_util.hpp"
#include "opengl.hpp"
#include "renderer_mtl/pica_to_mtl.hpp"
// TODO: remove dependency on OpenGL
#include "opengl.hpp"
template <typename T>
using Interval = boost::icl::right_open_interval<T>;
@ -52,22 +53,19 @@ namespace Metal {
void free();
u64 sizeInBytes();
u8 decodeTexelU8(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data);
u16 decodeTexelU16(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data);
u32 decodeTexelU32(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data);
// Get the morton interleave offset of a texel based on its U and V values
static u32 mortonInterleave(u32 u, u32 v);
// Get the byte offset of texel (u, v) in the texture
static u32 getSwizzledOffset(u32 u, u32 v, u32 width, u32 bytesPerPixel);
static u32 getSwizzledOffset_4bpp(u32 u, u32 v, u32 width);
u8 decodeTexelBGR8ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelA1BGR5ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelB5G6R5ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelABGR4ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelAI8ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelI8ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelAI4ToRGBA4(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelAI4ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelI4ToRGBA4(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelI4ToRGBA8(u32 u, u32 v, std::span<const u8> data);
u8 decodeTexelA4ToA8(u32 u, u32 v, std::span<const u8> data);
// Returns the format of this texture as a string
std::string_view formatToString() { return PICA::textureFormatToString(format); }
// Returns the texel at coordinates (u, v) of an ETC1(A4) texture
// TODO: Make hasAlpha a template parameter
u32 getTexelETC(bool hasAlpha, u32 u, u32 v, u32 width, std::span<const u8> data);
u32 decodeETC(u32 alpha, u32 u, u32 v, u64 colourData);
};
} // namespace Metal