286 lines
8.7 KiB
C++
286 lines
8.7 KiB
C++
#include "rom.h"
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#include <compressions/alttpcompression.h>
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#include <rommapping.h>
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#include <cstddef>
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#include <cstring>
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#include <filesystem>
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#include <fstream>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <vector>
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#include "app/core/constants.h"
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#include "app/gfx/tile.h"
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namespace yaze {
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namespace app {
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namespace rom {
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void ROM::Close() {
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if (is_loaded_) {
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delete[] current_rom_;
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for (auto &each : converted_graphic_sheets_) {
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free(each);
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}
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}
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}
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void ROM::SetupRenderer(std::shared_ptr<SDL_Renderer> renderer) {
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sdl_renderer_ = renderer;
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}
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// TODO: check if the rom has a header on load
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void ROM::LoadFromFile(const std::string &path) {
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size_ = std::filesystem::file_size(path.c_str());
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std::ifstream file(path.c_str(), std::ios::binary);
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if (!file.is_open()) {
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std::cout << "Error: Could not open ROM file " << path << std::endl;
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return;
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}
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current_rom_ = new unsigned char[size_];
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for (unsigned int i = 0; i < size_; i++) {
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char byte_read_ = ' ';
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file.read(&byte_read_, sizeof(char));
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current_rom_[i] = byte_read_;
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}
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file.close();
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memcpy(title, current_rom_ + 32704, 21);
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version_ = current_rom_[27];
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is_loaded_ = true;
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}
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char *ROM::Decompress(int pos, int size, bool reversed) {
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auto *buffer = new char[size];
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decompressed_graphic_sheets_.push_back(buffer);
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for (int i = 0; i < size; i++) {
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buffer[i] = 0;
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}
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unsigned int bufferPos = 0;
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unsigned char cmd = 0;
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unsigned int length = 0;
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uchar databyte = current_rom_[pos];
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while (true) {
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databyte = current_rom_[pos];
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// End of decompression
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if (databyte == 0xFF) {
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break;
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}
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// Expanded Command
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if ((databyte & 0xE0) == 0xE0) {
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cmd = (uchar)((databyte >> 2) & 0x07);
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length =
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(ushort)(((current_rom_[pos] << 8) | current_rom_[pos + 1]) & 0x3FF);
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pos += 2; // Advance 2 bytes in ROM
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} else { // Normal Command
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cmd = (uchar)((databyte >> 5) & 0x07);
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length = (uchar)(databyte & 0x1F);
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pos += 1; // Advance 1 byte in ROM
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}
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length += 1; // Every commands are at least 1 size even if 00
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switch (cmd) {
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case 00: // Direct Copy (Could be replaced with a MEMCPY)
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for (int i = 0; i < length; i++) {
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buffer[bufferPos++] = current_rom_[pos++];
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}
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// Do not advance in the ROM
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break;
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case 01: // Byte Fill
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for (int i = 0; i < length; i++) {
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buffer[bufferPos++] = current_rom_[pos];
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}
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pos += 1; // Advance 1 byte in the ROM
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break;
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case 02: // Word Fill
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for (int i = 0; i < length; i += 2) {
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buffer[bufferPos++] = current_rom_[pos];
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buffer[bufferPos++] = current_rom_[pos + 1];
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}
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pos += 2; // Advance 2 byte in the ROM
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break;
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case 03: // Increasing Fill
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{
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uchar incByte = current_rom_[pos];
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for (int i = 0; i < length; i++) {
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buffer[bufferPos++] = incByte++;
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}
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pos += 1; // Advance 1 byte in the ROM
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} break;
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case 04: // Repeat (Reversed byte order for maps)
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{
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ushort s1 = ((current_rom_[pos + 1] & 0xFF) << 8);
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ushort s2 = ((current_rom_[pos] & 0xFF));
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auto Addr = (ushort)(s1 | s2);
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for (int i = 0; i < length; i++) {
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buffer[bufferPos] = (unsigned char)buffer[Addr + i];
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bufferPos++;
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}
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pos += 2; // Advance 2 bytes in the ROM
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} break;
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}
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}
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return buffer;
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}
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gfx::SNESPalette ROM::ExtractPalette(uint addr, int bpp) {
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uint filePos = addr;
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uint palette_size = pow(2, bpp);
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auto *palette_data = (char *)malloc(sizeof(char) * (palette_size * 2));
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memcpy(palette_data, current_rom_ + filePos, palette_size * 2);
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for (int i = 0; i < palette_size; i++) std::cout << palette_data[i];
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std::cout << std::endl;
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gfx::SNESPalette pal(palette_data);
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return pal;
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}
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// 128x32
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uchar *ROM::SNES3bppTo8bppSheet(uchar *buffer_in, int sheet_id, int size) {
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// 8bpp sheet out
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const uchar bitmask[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
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auto *sheet_buffer_out = (uchar *)malloc(size);
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converted_graphic_sheets_.push_back(sheet_buffer_out);
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int xx = 0; // positions where we are at on the sheet
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int yy = 0;
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int pos = 0;
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int ypos = 0;
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if (sheet_id != 0) {
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yy = sheet_id;
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}
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// for each tiles
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// 16 per line
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for (int i = 0; i < 64; i++) {
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// for each line
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for (int y = 0; y < 8; y++) {
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//[0] + [1] + [16]
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for (int x = 0; x < 8; x++) {
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auto b1 = (uchar)((buffer_in[(y * 2) + (24 * pos)] & (bitmask[x])));
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auto b2 = (uchar)(buffer_in[((y * 2) + (24 * pos)) + 1] & (bitmask[x]));
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auto b3 = (uchar)(buffer_in[(16 + y) + (24 * pos)] & (bitmask[x]));
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unsigned char b = 0;
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if (b1 != 0) {
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b |= 1;
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}
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if (b2 != 0) {
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b |= 2;
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}
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if (b3 != 0) {
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b |= 4;
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}
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sheet_buffer_out[x + (xx) + (y * 128) + (yy * 1024)] = b;
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}
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}
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pos++;
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ypos++;
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xx += 8;
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if (ypos >= 16) {
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yy++;
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xx = 0;
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ypos = 0;
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}
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}
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return sheet_buffer_out;
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}
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SDL_Texture *ROM::DrawGraphicsSheet(int offset) {
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SDL_Surface *surface =
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SDL_CreateRGBSurfaceWithFormat(0, 128, 32, 8, SDL_PIXELFORMAT_INDEX8);
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std::cout << "Drawing surface #" << offset << std::endl;
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uchar *sheet_buffer = nullptr;
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for (int i = 0; i < 8; i++) {
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surface->format->palette->colors[i].r = i * 31;
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surface->format->palette->colors[i].g = i * 31;
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surface->format->palette->colors[i].b = i * 31;
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}
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uint snesAddr = 0;
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uint pcAddr = 0;
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snesAddr = (uint)((((current_rom_[0x4F80 + offset]) << 16) |
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((current_rom_[0x505F + offset]) << 8) |
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((current_rom_[0x513E + offset]))));
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pcAddr = core::SnesToPc(snesAddr);
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std::cout << "Decompressing..." << std::endl;
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char *decomp = Decompress(pcAddr);
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std::cout << "Converting to 8bpp sheet..." << std::endl;
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sheet_buffer = SNES3bppTo8bppSheet((uchar *)decomp);
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std::cout << "Assigning pixel data..." << std::endl;
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surface->pixels = sheet_buffer;
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std::cout << "Creating texture from surface..." << std::endl;
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SDL_Texture *sheet_texture = nullptr;
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sheet_texture = SDL_CreateTextureFromSurface(sdl_renderer_.get(), surface);
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if (sheet_texture == nullptr) {
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std::cout << "Error: " << SDL_GetError() << std::endl;
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}
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return sheet_texture;
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}
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int ROM::GetPCGfxAddress(uint8_t id) {
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auto gfxPtr1 =
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core::SnesToPc((current_rom_[core::constants::gfx_1_pointer + 1] << 8) +
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(current_rom_[core::constants::gfx_1_pointer]));
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auto gfxPtr2 =
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core::SnesToPc((current_rom_[core::constants::gfx_2_pointer + 1] << 8) +
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(current_rom_[core::constants::gfx_2_pointer]));
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auto gfxPtr3 =
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core::SnesToPc((current_rom_[core::constants::gfx_3_pointer + 1] << 8) +
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(current_rom_[core::constants::gfx_3_pointer]));
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uint8_t gfxGamePointer1 = current_rom_[gfxPtr1 + id];
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uint8_t gfxGamePointer2 = current_rom_[gfxPtr2 + id];
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uint8_t gfxGamePointer3 = current_rom_[gfxPtr3 + id];
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return core::SnesToPc(
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core::AddressFromBytes(gfxGamePointer1, gfxGamePointer2, gfxGamePointer3));
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}
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// 0-112 -> compressed 3bpp bgr -> (decompressed each) 0x600 chars
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// 113-114 -> compressed 2bpp -> (decompressed each) 0x800 chars
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// 115-126 -> uncompressed 3bpp sprites -> (each) 0x600 chars
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// 127-217 -> compressed 3bpp sprites -> (decompressed each) 0x600 chars
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// 218-222 -> compressed 2bpp -> (decompressed each) 0x800 chars
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char *ROM::CreateAllGfxDataRaw() {
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auto *buffer = new char[346624];
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auto *data = new char[2048];
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int bufferPos = 0;
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unsigned int uncompressedSize = 0;
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unsigned int compressedSize = 0;
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for (int i = 0; i < core::constants::NumberOfSheets; i++) {
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isbpp3[i] = ((i >= 0 && i <= 112) || // Compressed 3bpp bg
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(i >= 115 && i <= 126) || // Uncompressed 3bpp sprites
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(i >= 127 && i <= 217) // Compressed 3bpp sprites
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);
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// uncompressed sheets
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if (i >= 115 && i <= 126) {
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data = new char[core::constants::Uncompressed3BPPSize];
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int startAddress = GetPCGfxAddress(i);
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for (int j = 0; j < core::constants::Uncompressed3BPPSize; j++) {
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data[j] = current_rom_[j + startAddress];
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}
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} else {
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data =
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alttp_decompress_gfx((char *)current_rom_, GetPCGfxAddress((char)i),
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core::constants::UncompressedSheetSize,
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&uncompressedSize, &compressedSize);
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}
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for (int j = 0; j < sizeof(data); j++) {
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buffer[j + bufferPos] = data[j];
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}
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bufferPos += sizeof(data);
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}
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return buffer;
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}
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} // namespace rom
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} // namespace app
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} // namespace yaze
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