Gary Talent
a4a00c99d0
cb304ecf [applib] Cleanup ea173777 [ox/std] Make StringViewCR honest c424bde0 [nostalgia] Style cleanup ee7d5c6d [nostalgia/gfx] Cleanup 99247cee [nostalgia/gfx/test] Cleanup 7b8ddc18 [nostalgia/gfx] Consolidate implementations into single files, remove unnecessary function exports a6814030 [studio/applib] Cleanup 9937a010 [turbine] Cleanup abcf2adc [nostalgia/gfx] Cleanup 05f90235 [nostalgia/gfx] Cleanup 5ba0bcf9 [turbine] Consolidate some files that didn't have sensible distinctions git-subtree-dir: deps/nostalgia git-subtree-split: cb304ecf2852db37a7aa7ca3bfc9d28877d5c1bd
382 lines
11 KiB
C++
382 lines
11 KiB
C++
/*
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* Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
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*/
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#include <ox/fs/fs.hpp>
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#include <ox/std/array.hpp>
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#include <teagba/addresses.hpp>
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#include <teagba/gfx.hpp>
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#include <teagba/registers.hpp>
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#include <keel/keel.hpp>
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#include <nostalgia/gfx/context.hpp>
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#include <nostalgia/gfx/gfx.hpp>
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#include <nostalgia/gfx/tilesheet.hpp>
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OX_ALLOW_UNSAFE_BUFFERS_BEGIN
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namespace nostalgia::gfx {
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struct BgCbbData {
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unsigned bpp = 4;
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};
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class Context {
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public:
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turbine::Context &turbineCtx;
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ox::Array<BgCbbData, 4> cbbData;
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explicit Context(turbine::Context &tctx) noexcept: turbineCtx{tctx} {}
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Context(Context &other) noexcept = delete;
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Context(Context const&other) noexcept = delete;
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Context(Context const&&other) noexcept = delete;
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virtual ~Context() noexcept = default;
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[[nodiscard]]
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ox::MemFS const&rom() const noexcept {
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return static_cast<ox::MemFS const&>(*turbine::rom(turbineCtx));
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}
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};
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void safeDelete(Context *ctx) noexcept {
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delete ctx;
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}
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keel::Context &keelCtx(Context &ctx) noexcept {
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return turbine::keelCtx(ctx.turbineCtx);
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}
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turbine::Context &turbineCtx(Context &ctx) noexcept {
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return ctx.turbineCtx;
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}
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static constexpr auto SpriteCount = 128;
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static ox::Error initGfx() noexcept {
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for (auto bgCtl = ®_BG0CTL; bgCtl <= ®_BG3CTL; bgCtl += 2) {
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teagba::bgSetSbb(*bgCtl, 28);
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}
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for (uint16_t i = 0; i < SpriteCount; ++i) {
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auto &sa = teagba::spriteAttr(i);
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sa.idx = i;
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}
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return {};
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}
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ox::Result<ox::UPtr<Context>> init(turbine::Context &tctx, InitParams const&) noexcept {
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auto ctx = ox::make_unique<Context>(tctx);
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OX_RETURN_ERROR(initGfx());
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return ctx;
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}
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ox::Error loadBgPalette(
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Context&,
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size_t const palBank,
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CompactPalette const&palette,
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size_t const page) noexcept {
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if (palette.pages.empty()) {
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return {};
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}
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auto const paletteMem = MEM_BG_PALETTE + palBank * 16;
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for (auto i = 0u; i < colorCnt(palette, page); ++i) {
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paletteMem[i] = color(palette, page, i);
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}
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return {};
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}
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ox::Error loadSpritePalette(
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Context&,
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CompactPalette const&palette,
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size_t const page) noexcept {
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if (palette.pages.empty()) {
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return {};
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}
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auto const paletteMem = MEM_SPRITE_PALETTE;
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for (auto i = 0u; i < colorCnt(palette, page); ++i) {
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paletteMem[i] = color(palette, page, i);
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}
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return {};
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}
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void clearCbb(Context&, unsigned const cbb) noexcept {
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for (auto &v : MEM_BG_TILES[cbb]) {
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v = 0;
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}
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}
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void clearCbbs(Context &ctx) noexcept {
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clearCbb(ctx, 0);
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clearCbb(ctx, 1);
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clearCbb(ctx, 2);
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clearCbb(ctx, 3);
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}
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static ox::Error loadTileSheetSet(
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Context &ctx,
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ox::Span<uint16_t> tileMapTargetMem,
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TileSheetSet const&set) noexcept {
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size_t tileWriteIdx = 0;
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size_t const bppMod = set.bpp == 4;
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for (auto const&entry : set.entries) {
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OX_REQUIRE(ts, keel::readObj<CompactTileSheet>(keelCtx(ctx), entry.tilesheet));
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if (set.bpp != ts->bpp && ts->bpp == 8) {
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return ox::Error(1, "cannot load an 8 BPP tilesheet into a 4 BPP CBB");
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}
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for (auto const&s : entry.sections) {
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auto const cnt = (static_cast<size_t>(s.tiles) * PixelsPerTile) >> bppMod;
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for (size_t i = 0; i < cnt; ++i) {
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auto const begin = static_cast<size_t>(s.begin) * (PixelsPerTile >> bppMod);
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auto const srcIdx = begin + i * 2;
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auto const v = static_cast<uint16_t>(
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static_cast<uint16_t>(ts->pixels[srcIdx]) |
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(static_cast<uint16_t>(ts->pixels[srcIdx + 1]) << 8));
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tileMapTargetMem[tileWriteIdx + i] = v;
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}
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tileWriteIdx += cnt >> bppMod;
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}
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}
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return {};
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}
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ox::Error loadBgTileSheet(
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Context &ctx,
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unsigned const cbb,
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CompactTileSheet const&ts,
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size_t const dstTileIdx,
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size_t const srcTileIdx,
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size_t const tileCnt) noexcept {
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size_t const bppMod = ts.bpp == 4;
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size_t const bytesPerTile = PixelsPerTile >> bppMod;
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auto const cnt = (tileCnt * bytesPerTile) / 2;
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auto const srcPxIdx = srcTileIdx * bytesPerTile;
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auto const dstPxIdx = (dstTileIdx * bytesPerTile) / 2;
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for (size_t i = 0; i < cnt; ++i) {
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auto const srcIdx = srcPxIdx + i * 2;
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auto const p1 = static_cast<uint16_t>(ts.pixels[srcIdx]);
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auto const p2 = static_cast<uint16_t>(ts.pixels[srcIdx + 1]);
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MEM_BG_TILES[cbb][dstPxIdx + i] = static_cast<uint16_t>(p1 | (p2 << 8));
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}
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// update bpp of all bgs with the updated cbb
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auto const bpp = ctx.cbbData[cbb].bpp;
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teagba::iterateBgCtl([bpp, cbb](volatile BgCtl &bgCtl) {
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if (teagba::bgCbb(bgCtl) == cbb) {
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teagba::bgSetBpp(bgCtl, bpp);
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}
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});
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return {};
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}
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ox::Error loadBgTileSheet(
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Context &ctx,
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unsigned const cbb,
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CompactTileSheet const&ts,
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ox::Optional<unsigned> const&paletteBank) noexcept {
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auto const cnt = (ts.pixels.size() * PixelsPerTile) / (1 + (ts.bpp == 4));
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for (size_t i = 0; i < cnt; ++i) {
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auto const srcIdx = i * 2;
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auto const p1 = static_cast<uint16_t>(ts.pixels[srcIdx]);
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auto const p2 = static_cast<uint16_t>(ts.pixels[srcIdx + 1]);
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MEM_BG_TILES[cbb][i] = static_cast<uint16_t>(p1 | (p2 << 8));
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}
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// update bpp of all bgs with the updated cbb
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auto const bpp = ctx.cbbData[cbb].bpp;
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teagba::iterateBgCtl([bpp, cbb](volatile BgCtl &bgCtl) {
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if (teagba::bgCbb(bgCtl) == cbb) {
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teagba::bgSetBpp(bgCtl, bpp);
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}
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});
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if (paletteBank.has_value() && ts.defaultPalette) {
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OX_RETURN_ERROR(loadBgPalette(ctx, *paletteBank, ts.defaultPalette));
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}
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return {};
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}
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ox::Error loadBgTileSheet(
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Context &ctx,
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unsigned const cbb,
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TileSheetSet const&set) noexcept {
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auto const bpp = static_cast<unsigned>(set.bpp);
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OX_RETURN_ERROR(loadTileSheetSet(ctx, MEM_BG_TILES[cbb], set));
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// update bpp of all bgs with the updated cbb
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ctx.cbbData[cbb].bpp = bpp;
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teagba::iterateBgCtl([bpp, cbb](volatile BgCtl &bgCtl) {
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if (teagba::bgCbb(bgCtl) == cbb) {
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teagba::bgSetBpp(bgCtl, bpp);
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}
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});
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return {};
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}
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static void setSpritesBpp(unsigned const bpp) noexcept {
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auto const eightBpp = static_cast<uint16_t >(bpp == 8);
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for (auto i = 0u; i < SpriteCount; ++i) {
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auto &sa = teagba::spriteAttr(i);
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auto &a = sa.attr0;
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a |= static_cast<uint16_t>((a & ~static_cast<uint16_t>(1u << 13)) | (eightBpp << 13));
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}
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}
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ox::Error loadSpriteTileSheet(
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Context &ctx,
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CompactTileSheet const&ts,
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bool const loadDefaultPalette) noexcept {
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for (size_t i = 0; i < ts.pixels.size(); i += 2) {
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uint16_t v = ts.pixels[i];
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v |= static_cast<uint16_t>(ts.pixels[i + 1] << 8);
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MEM_SPRITE_TILES[i] = v;
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}
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if (loadDefaultPalette && ts.defaultPalette) {
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OX_RETURN_ERROR(loadSpritePalette(ctx, ts.defaultPalette));
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}
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setSpritesBpp(static_cast<unsigned>(ts.bpp));
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return {};
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}
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ox::Error loadSpriteTileSheet(
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Context &ctx,
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TileSheetSet const&set) noexcept {
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auto const bpp = static_cast<unsigned>(set.bpp);
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OX_RETURN_ERROR(loadTileSheetSet(ctx, {MEM_SPRITE_TILES, 32 * ox::units::KB}, set));
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setSpritesBpp(bpp);
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return {};
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}
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void setBgTile(
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Context &ctx, uint_t const bgIdx, int const column, int const row, BgTile const&tile) noexcept {
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auto const tileIdx = static_cast<std::size_t>(row * tileColumns(ctx) + column);
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// see Tonc 9.3
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MEM_BG_MAP[bgIdx][tileIdx] =
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static_cast<uint16_t>(tile.tileIdx & 0b1'1111'1111) |
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static_cast<uint16_t>(tile.flipX << 0xa) |
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static_cast<uint16_t>(tile.flipY << 0xb) |
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static_cast<uint16_t>(tile.palBank << 0xc);
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}
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void clearBg(Context &ctx, uint_t const bgIdx) noexcept {
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memset(MEM_BG_MAP[bgIdx].data(), 0, static_cast<size_t>(tileRows(ctx) * tileColumns(ctx)));
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}
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uint8_t bgStatus(Context&) noexcept {
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return (REG_DISPCTL >> 8u) & 0b1111u;
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}
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void setBgStatus(Context&, uint32_t const status) noexcept {
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constexpr auto BgStatus = 8;
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REG_DISPCTL = (REG_DISPCTL & ~0b111100000000u) | status << BgStatus;
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}
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bool bgStatus(Context&, unsigned const bg) noexcept {
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return (REG_DISPCTL >> (8 + bg)) & 1;
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}
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void setBgStatus(Context&, unsigned const bg, bool const status) noexcept {
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constexpr auto Bg0Status = 8;
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const auto mask = static_cast<uint32_t>(status) << (Bg0Status + bg);
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REG_DISPCTL = REG_DISPCTL | ((REG_DISPCTL & ~mask) | mask);
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}
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void setBgBpp(Context&, unsigned const bgIdx, unsigned const bpp) noexcept {
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auto &bgCtl = regBgCtl(bgIdx);
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teagba::bgSetBpp(bgCtl, bpp);
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}
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void setBgCbb(Context &ctx, unsigned const bgIdx, unsigned const cbbIdx) noexcept {
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auto &bgCtl = regBgCtl(bgIdx);
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const auto &cbbData = ctx.cbbData[cbbIdx];
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teagba::bgSetBpp(bgCtl, cbbData.bpp);
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teagba::bgSetCbb(bgCtl, cbbIdx);
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}
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void setBgPriority(Context&, uint_t const bgIdx, uint_t const priority) noexcept {
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auto &bgCtl = regBgCtl(bgIdx);
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bgCtl = (bgCtl & 0b1111'1111'1111'1100u) | (priority & 0b11);
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}
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void hideSprite(Context&, unsigned const idx) noexcept {
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//oxAssert(g_spriteUpdates < config::GbaSpriteBufferLen, "Sprite update buffer overflow");
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teagba::addSpriteUpdate({
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.attr0 = uint16_t{0b11 << 8},
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.idx = static_cast<uint16_t>(idx),
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});
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}
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void showSprite(Context&, unsigned const idx) noexcept {
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//oxAssert(g_spriteUpdates < config::GbaSpriteBufferLen, "Sprite update buffer overflow");
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teagba::addSpriteUpdate({
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.attr0 = 0,
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.idx = static_cast<uint16_t>(idx),
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});
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}
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void setSprite(Context&, uint_t const idx, Sprite const&s) noexcept {
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//oxAssert(g_spriteUpdates < config::GbaSpriteBufferLen, "Sprite update buffer overflow");
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uint16_t const eightBpp = s.bpp == 8;
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teagba::addSpriteUpdate({
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.attr0 = static_cast<uint16_t>(
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(static_cast<uint16_t>(s.y & ox::onMask<uint8_t>(0b111'1111)))
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| (static_cast<uint16_t>(1) << 10) // enable alpha
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| (static_cast<uint16_t>(eightBpp) << 13)
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| (static_cast<uint16_t>(s.spriteShape) << 14)),
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.attr1 = static_cast<uint16_t>(
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(static_cast<uint16_t>(s.x) & ox::onMask<uint8_t>(8))
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| (static_cast<uint16_t>(s.flipX) << 12)
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| (static_cast<uint16_t>(s.spriteSize) << 14)),
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.attr2 = static_cast<uint16_t>(
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// double tileIdx if 8 bpp
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(static_cast<uint16_t>((s.tileIdx * (1 + eightBpp)) & ox::onMask<uint16_t>(8)))
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| (static_cast<uint16_t>(s.priority & 0b11) << 10)),
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.idx = static_cast<uint16_t>(idx),
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});
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}
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uint_t spriteCount(Context const&) noexcept {
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return SpriteCount;
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}
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}
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namespace ox {
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void panic(const char *file, int line, const char *panicMsg, ox::Error const&err) noexcept {
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using namespace nostalgia::gfx;
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// reset heap to make sure we have enough memory to allocate context data
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OX_ALLOW_UNSAFE_BUFFERS_BEGIN
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const auto heapBegin = reinterpret_cast<char*>(MEM_EWRAM_BEGIN);
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const auto heapSz = (MEM_EWRAM_END - MEM_EWRAM_BEGIN) / 2;
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const auto heapEnd = reinterpret_cast<char*>(MEM_EWRAM_BEGIN + heapSz);
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ox::heapmgr::initHeap(heapBegin, heapEnd);
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OX_ALLOW_UNSAFE_BUFFERS_END
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auto tctx = turbine::init(keel::loadRomFs("").unwrap(), "Nostalgia").unwrap();
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auto ctx = init(*tctx).unwrap();
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std::ignore = initGfx();
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std::ignore = initConsole(*ctx);
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setBgStatus(*ctx, 0, true);
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clearBg(*ctx, 0);
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auto const serr = ox::sfmt<ox::IString<23>>("Error code: {}", static_cast<int64_t>(err));
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consoleWrite(*ctx, 32 + 1, 1, "SADNESS...");
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consoleWrite(*ctx, 32 + 1, 4, "UNEXPECTED STATE:");
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consoleWrite(*ctx, 32 + 2, 6, panicMsg);
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if (err) {
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consoleWrite(*ctx, 32 + 2, 8, serr);
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}
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consoleWrite(*ctx, 32 + 1, 15, "PLEASE RESTART THE SYSTEM");
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// print to terminal if in mGBA
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oxErrf("\033[31;1;1mPANIC:\033[0m [{}:{}]: {}\n", file, line, panicMsg);
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if (err.msg) {
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oxErrf("\tError Message:\t{}\n", err.msg);
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}
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oxErrf("\tError Code:\t{}\n", static_cast<ErrorCode>(err));
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if (err.src.file_name() != nullptr) {
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oxErrf("\tError Location:\t{}:{}\n", err.src.file_name(), err.src.line());
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}
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abort();
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}
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}
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OX_ALLOW_UNSAFE_BUFFERS_END
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