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fix(gfx): convert indexed sheets to SNES planar

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scawful
2025-12-22 14:29:26 -05:00
parent ea4e1873de
commit ffc3ddd854
4 changed files with 189 additions and 67 deletions
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58
src/app/editor/graphics/graphics_editor.cc
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@@ -2,6 +2,7 @@
#include "graphics_editor.h"
// C++ standard library headers
#include <algorithm>
#include <filesystem>
// Third-party library headers
@@ -229,22 +230,6 @@ absl::Status GraphicsEditor::Save() {
compressed = false;
}
// Convert 8BPP bitmap data to SNES indexed format
auto indexed_data = gfx::Bpp8SnesToIndexed(sheet.vector(), bpp);
std::vector<uint8_t> final_data;
if (compressed) {
// Compress using Hyrule Magic LC-LZ2
int compressed_size = 0;
auto compressed_data = gfx::HyruleMagicCompress(
indexed_data.data(), static_cast<int>(indexed_data.size()),
&compressed_size, 1);
final_data.assign(compressed_data.begin(),
compressed_data.begin() + compressed_size);
} else {
final_data = std::move(indexed_data);
}
// Calculate ROM offset for this sheet
// Get version constants from game_data
auto version_constants = zelda3::kVersionConstantsMap.at(game_data()->version);
@@ -254,6 +239,47 @@ absl::Status GraphicsEditor::Save() {
version_constants.kOverworldGfxPtr2,
version_constants.kOverworldGfxPtr3, rom_->size());
// Convert 8BPP bitmap data to SNES planar format
auto snes_tile_data = gfx::IndexedToSnesSheet(sheet.vector(), bpp);
constexpr size_t kDecompressedSheetSize = 0x800;
std::vector<uint8_t> base_data;
if (compressed) {
auto decomp_result = gfx::lc_lz2::DecompressV2(
rom_->data(), offset, static_cast<int>(kDecompressedSheetSize), 1,
rom_->size());
if (!decomp_result.ok()) {
return decomp_result.status();
}
base_data = std::move(*decomp_result);
} else {
auto read_result =
rom_->ReadByteVector(offset, kDecompressedSheetSize);
if (!read_result.ok()) {
return read_result.status();
}
base_data = std::move(*read_result);
}
if (base_data.size() < snes_tile_data.size()) {
base_data.resize(snes_tile_data.size(), 0);
}
std::copy(snes_tile_data.begin(), snes_tile_data.end(),
base_data.begin());
std::vector<uint8_t> final_data;
if (compressed) {
// Compress using Hyrule Magic LC-LZ2
int compressed_size = 0;
auto compressed_data = gfx::HyruleMagicCompress(
base_data.data(), static_cast<int>(base_data.size()),
&compressed_size, 1);
final_data.assign(compressed_data.begin(),
compressed_data.begin() + compressed_size);
} else {
final_data = std::move(base_data);
}
// Write data to ROM buffer
for (size_t i = 0; i < final_data.size(); i++) {
rom_->WriteByte(offset + i, final_data[i]);