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37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
#pragma once
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// Frostbite texture resources (ported from ReSkateStudio's
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// sdk/resources/texture_resource) and CPU decoding of their pixel chunks.
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#include "binary_io.h"
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#include <array>
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#include <cstddef>
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#include <cstdint>
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#include <span>
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#include <vector>
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namespace dingosdk::frostbite {
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inline constexpr std::uint32_t texture_resource_type = 0x6BDE20BA;
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struct TextureHeader {
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std::uint32_t type{}; // 0 = 2D
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std::uint32_t format{}; // Frostbite format ordinal
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std::uint16_t flags{};
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std::uint16_t width{}, height{}, depth{}, slices{};
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std::uint8_t mip_count{}, first_mip{};
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Guid chunk;
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std::array<std::uint32_t, 15> mip_sizes{};
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std::uint32_t chunk_size{};
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};
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// `header` is the resource payload, `metadata` its bundle resource metadata.
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TextureHeader read_texture_header(std::span<const std::byte> header, std::span<const std::byte> metadata);
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struct Image {
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std::uint32_t width{}, height{};
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std::vector<std::uint8_t> rgba; // straight alpha, rows top to bottom
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};
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// The smallest mip at least `minimum` pixels on its shorter side (or mip 0),
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// decoded to RGBA. Supports BC1-3, BC7 and 8-bit RGBA/BGRA; throws otherwise.
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Image decode_texture(const TextureHeader& header, std::span<const std::byte> chunk, std::uint32_t minimum);
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// Box-filtered resize to exactly `width` x `height`.
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Image resize(const Image& image, std::uint32_t width, std::uint32_t height);
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}
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