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[PICA] More textoor

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wheremyfoodat 2023-02-01 00:34:58 +02:00
parent ce72368f01
commit 51130b295a
6 changed files with 53 additions and 2 deletions
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34
src/core/renderer_gl/textures.cpp
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@ -1,4 +1,5 @@
#include "renderer_gl/textures.hpp"
#include "colour.hpp"
void Texture::allocate() {
Helpers::panic("Tried to allocate texture");
@ -70,4 +71,37 @@ u32 Texture::getSwizzledOffset(u32 u, u32 v, u32 width, u32 bytesPerPixel) {
offset += mortonInterleave(u, v); // Add the in-tile offset of the texel
return offset * bytesPerPixel;
}
u32 Texture::decodeTexel(u32 u, u32 v, Texture::Formats fmt, void* data) {
switch (fmt) {
case Formats::RGBA4: {
u32 offset = getSwizzledOffset(u, v, size.u(), 2);
u8* ptr = static_cast<u8*>(data);
u16 texel = u16(ptr[offset]) | (u16(ptr[offset + 1]) << 8);
u8 alpha = Colour::convert4To8Bit(texel & 0xf);
u8 b = Colour::convert4To8Bit((texel >> 4) & 0xf);
u8 g = Colour::convert4To8Bit((texel >> 8) & 0xf);
u8 r = Colour::convert4To8Bit((texel >> 12) & 0xf);
return (r << 24) | (g << 16) | (b << 8) | alpha;
}
default:
Helpers::panic("[Texture::DecodeTexel] Unimplemented format = %d", static_cast<int>(fmt));
}
}
void Texture::decodeTexture(void* data) {
std::vector<u32> decoded;
decoded.reserve(size.u() * size.v());
// Decode texels line by line
for (u32 v = 0; v < size.v(); v++) {
for (u32 u = 0; u < size.u(); u++) {
u32 colour = decodeTexel(u, v, format, data);
decoded.push_back(colour);
}
}
}