Martin Michelsen
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
#pragma once
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#include <phosg/Encoding.hh>
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#include <phosg/Image.hh>
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#include <phosg/Strings.hh>
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#include "Text.hh"
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enum class GVRDataFormat : uint8_t {
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INTENSITY_4 = 0x00,
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INTENSITY_8 = 0x01,
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INTENSITY_A4 = 0x02,
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INTENSITY_A8 = 0x03,
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RGB565 = 0x04,
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RGB5A3 = 0x05,
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ARGB8888 = 0x06,
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INDEXED_4 = 0x08,
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INDEXED_8 = 0x09,
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DXT1 = 0x0E,
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};
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std::string encode_gvm(const Image& img, GVRDataFormat data_format);
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constexpr uint16_t encode_rgb565(uint8_t r, uint8_t g, uint8_t b) {
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return ((r << 8) & 0xF800) | ((g << 3) & 0x07E0) | ((b >> 3) & 0x001F);
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}
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constexpr uint16_t encode_rgb5a3(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
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if ((a & 0xE0) == 0xE0) {
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return 0x8000 | ((r << 7) & 0x7C00) | ((g << 2) & 0x03E0) | ((b >> 3) & 0x001F);
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} else {
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return ((a << 7) & 0x7000) | ((r << 4) & 0x0F00) | (g & 0x00F0) | ((b >> 4) & 0x000F);
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}
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}
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constexpr uint32_t encode_argb8888(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
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return (a << 24) | (r << 16) | (g << 8) | b;
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}
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constexpr uint16_t encode_xrgb8888_to_xrgb1555(uint32_t xrgb8888) {
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// In: rrrrrrrrggggggggbbbbbbbbaaaaaaaa
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// Out: -rrrrrgggggbbbbb
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return ((xrgb8888 >> 9) & 0x7C00) | ((xrgb8888 >> 6) & 0x03E0) | ((xrgb8888 >> 3) & 0x001F);
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}
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constexpr uint16_t encode_rgbx8888_to_xrgb1555(uint32_t rgbx8888) {
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// In: rrrrrrrrggggggggbbbbbbbbxxxxxxxx
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// Out: -rrrrrgggggbbbbb
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return ((rgbx8888 >> 17) & 0x7C00) | ((rgbx8888 >> 14) & 0x03E0) | ((rgbx8888 >> 11) & 0x001F);
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}
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constexpr uint32_t decode_xrgb1555_to_rgba8888(uint16_t xrgb1555) {
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// In: -rrrrrgggggbbbbb
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// Out: rrrrrrrrggggggggbbbbbbbbaaaaaaaa (a is always FF)
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return ((xrgb1555 << 17) & 0xF8000000) | ((xrgb1555 << 12) & 0x07000000) |
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((xrgb1555 << 14) & 0x00F80000) | ((xrgb1555 << 9) & 0x00070000) |
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((xrgb1555 << 11) & 0x0000F800) | ((xrgb1555 << 6) & 0x00000700) |
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0x000000FF;
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}
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