mirror of https://github.com/bsnes-emu/bsnes.git
103 lines
3.7 KiB
C++
103 lines
3.7 KiB
C++
uint PPU::Line::start = 0;
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uint PPU::Line::count = 0;
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auto PPU::Line::flush() -> void {
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if(Line::count) {
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#pragma omp parallel for if(Line::count >= 8)
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for(uint y = 0; y < Line::count; y++) {
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ppu.lines[Line::start + y].render();
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}
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Line::start = 0;
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Line::count = 0;
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}
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}
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auto PPU::Line::render() -> void {
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auto output = ppu.output + y * 1024;
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if(ppu.interlace() && ppu.field()) output += 512;
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auto width = !ppu.hires() ? 256 : 512;
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if(io.displayDisable) {
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memory::fill<uint32>(output, width);
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return;
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}
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bool hires = io.pseudoHires || io.bgMode == 5 || io.bgMode == 6;
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bool hiresMode7 = io.bgMode == 7 && configuration.hacks.ppuFast.hiresMode7;
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auto aboveColor = cgram[0];
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auto belowColor = hires ? cgram[0] : io.col.fixedColor;
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for(uint x : range(256 << hiresMode7)) {
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above[x] = {Source::COL, 0, aboveColor};
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below[x] = {Source::COL, 0, belowColor};
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}
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renderBackground(io.bg1, Source::BG1);
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renderBackground(io.bg2, Source::BG2);
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renderBackground(io.bg3, Source::BG3);
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renderBackground(io.bg4, Source::BG4);
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renderObject(io.obj);
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renderWindow(io.col.window, io.col.window.aboveMask, windowAbove);
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renderWindow(io.col.window, io.col.window.belowMask, windowBelow);
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auto luma = io.displayBrightness << 15;
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if(hiresMode7) for(uint x : range(512)) {
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auto Above = above[x >> 1].source >= Source::OBJ1 ? above[x >> 1] : above[x >> 1 | (x & 1 ? 256 : 0)];
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auto Below = below[x >> 1].source >= Source::OBJ1 ? below[x >> 1] : below[x >> 1 | (x & 1 ? 256 : 0)];
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*output++ = luma | pixel(x >> 1, Above, Below);
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} else if(width == 256) for(uint x : range(256)) {
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*output++ = luma | pixel(x, above[x], below[x]);
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} else if(!hires) for(uint x : range(256)) {
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auto color = luma | pixel(x, above[x], below[x]);
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*output++ = color;
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*output++ = color;
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} else for(uint x : range(256)) {
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*output++ = luma | pixel(x, below[x], above[x]);
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*output++ = luma | pixel(x, above[x], below[x]);
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}
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}
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auto PPU::Line::pixel(uint x, Pixel above, Pixel below) const -> uint15 {
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if(!windowAbove[x]) above.color = 0x0000;
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if(!windowBelow[x]) return above.color;
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if(!io.col.enable[above.source]) return above.color;
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if(!io.col.blendMode) return blend(above.color, io.col.fixedColor, io.col.halve && windowAbove[x]);
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return blend(above.color, below.color, io.col.halve && windowAbove[x] && below.source != Source::COL);
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}
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auto PPU::Line::blend(uint x, uint y, bool halve) const -> uint15 {
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if(!io.col.mathMode) { //add
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if(!halve) {
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uint sum = x + y;
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uint carry = (sum - ((x ^ y) & 0x0421)) & 0x8420;
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return (sum - carry) | (carry - (carry >> 5));
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} else {
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return (x + y - ((x ^ y) & 0x0421)) >> 1;
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}
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} else { //sub
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uint diff = x - y + 0x8420;
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uint borrow = (diff - ((x ^ y) & 0x8420)) & 0x8420;
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if(!halve) {
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return (diff - borrow) & (borrow - (borrow >> 5));
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} else {
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return (((diff - borrow) & (borrow - (borrow >> 5))) & 0x7bde) >> 1;
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}
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}
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}
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auto PPU::Line::directColor(uint paletteIndex, uint paletteColor) const -> uint15 {
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//paletteIndex = bgr
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//paletteColor = BBGGGRRR
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//output = 0 BBb00 GGGg0 RRRr0
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return (paletteColor << 2 & 0x001c) + (paletteIndex << 1 & 0x0002) //R
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+ (paletteColor << 4 & 0x0380) + (paletteIndex << 5 & 0x0040) //G
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+ (paletteColor << 7 & 0x6000) + (paletteIndex << 10 & 0x1000); //B
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}
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auto PPU::Line::plotAbove(uint x, uint source, uint priority, uint color) -> void {
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if(priority > above[x].priority) above[x] = {source, priority, color};
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}
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auto PPU::Line::plotBelow(uint x, uint source, uint priority, uint color) -> void {
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if(priority > below[x].priority) below[x] = {source, priority, color};
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}
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