mirror of
https://github.com/wiiu-env/AutobootModule.git
synced 2024-11-17 08:39:15 +01:00
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
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#include <gx2/draw.h>
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#include <gx2/mem.h>
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#include <malloc.h>
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#include <span>
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#include "TGATexture.h"
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#include "logger.h"
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#include <whb/log.h>
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/*
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* Based on
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* https://github.com/Xpl0itU/savemii/blob/70e3b63db52113519230e1e39bd56876cef12dc8/src/tga_reader.cpp
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* and
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* https://github.com/Crementif/WiiU-GX2-Shader-Examples/blob/5a88f861043dcb7666d4d25a6bab6bd271e76d5f/include/TGATexture.h
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*/
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uint16_t inline _swapU16(uint16_t v) {
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return (v >> 8) | (v << 8);
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}
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GX2Texture *TGA_LoadTexture(std::span<uint8_t> data) {
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TGA_HEADER *tgaHeader = (TGA_HEADER *) data.data();
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uint32_t width = _swapU16(tgaHeader->width);
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uint32_t height = _swapU16(tgaHeader->height);
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if (tgaHeader->bits != 24) {
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DEBUG_FUNCTION_LINE_WARN("Only 24bit TGA images are supported");
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return nullptr;
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}
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if (tgaHeader->imagetype != 2 && tgaHeader->imagetype != 3) {
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DEBUG_FUNCTION_LINE_WARN("Only uncompressed TGA images are supported");
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return nullptr;
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}
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GX2Texture *texture = (GX2Texture *) malloc(sizeof(GX2Texture));
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*texture = {};
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texture->surface.width = width;
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texture->surface.height = height;
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texture->surface.depth = 1;
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texture->surface.mipLevels = 1;
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texture->surface.format = GX2_SURFACE_FORMAT_UNORM_R8_G8_B8_A8;
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texture->surface.aa = GX2_AA_MODE1X;
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texture->surface.use = GX2_SURFACE_USE_TEXTURE;
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texture->surface.dim = GX2_SURFACE_DIM_TEXTURE_2D;
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texture->surface.tileMode = GX2_TILE_MODE_LINEAR_ALIGNED;
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texture->surface.swizzle = 0;
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texture->viewFirstMip = 0;
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texture->viewNumMips = 1;
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texture->viewFirstSlice = 0;
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texture->viewNumSlices = 1;
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texture->compMap = 0x0010203;
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GX2CalcSurfaceSizeAndAlignment(&texture->surface);
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GX2InitTextureRegs(texture);
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if (texture->surface.imageSize == 0) {
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return nullptr;
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}
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texture->surface.image = memalign(texture->surface.alignment, texture->surface.imageSize);
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if (!texture->surface.image) {
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return nullptr;
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}
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for (uint32_t y = 0; y < height; y++) {
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uint32_t *out_data = (uint32_t *) texture->surface.image + (y * texture->surface.pitch);
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for (uint32_t x = 0; x < width; x++) {
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int index = sizeof(TGA_HEADER) + (3 * width * (height - 1 - y)) + (3 * x);
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int b = data[index + 0] & 0xFF;
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int g = data[index + 1] & 0xFF;
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int r = data[index + 2] & 0xFF;
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*out_data = r << 24 | g << 16 | b << 8 | 0xFF;
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out_data++;
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}
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}
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// todo: create texture with optimal tile format and use GX2CopySurface to convert from linear to tiled format
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GX2Invalidate(GX2_INVALIDATE_MODE_CPU | GX2_INVALIDATE_MODE_TEXTURE, texture->surface.image, texture->surface.imageSize);
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return texture;
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}
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