mirror of https://github.com/bsnes-emu/bsnes.git
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
auto VDP::frame() -> void {
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latch.overscan = io.overscan;
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}
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auto VDP::scanline() -> void {
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state.hdot = 0;
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state.hcounter = 0;
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if(++state.vcounter >= frameHeight()) state.vcounter = 0;
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if(state.vcounter == 0) frame();
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latch.displayWidth = io.displayWidth;
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if(state.vcounter < screenHeight()) {
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planeA.scanline(state.vcounter);
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window.scanline(state.vcounter);
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planeB.scanline(state.vcounter);
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sprite.scanline(state.vcounter);
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}
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if(state.vcounter == 240) scheduler.exit(Scheduler::Event::Frame);
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state.output = buffer + (state.vcounter * 2 + 0) * 1280;
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}
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auto VDP::run() -> void {
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if(!io.displayEnable) return outputPixel(0);
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if(state.vcounter >= screenHeight()) return outputPixel(0);
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auto& planeA = window.isWindowed(state.hdot, state.vcounter) ? window : this->planeA;
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planeA.run(state.hdot, state.vcounter);
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planeB.run(state.hdot, state.vcounter);
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sprite.run(state.hdot, state.vcounter);
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auto output = io.backgroundColor;
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if(auto color = planeB.output.color) output = color;
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if(auto color = planeA.output.color) output = color;
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if(auto color = sprite.output.color) output = color;
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if(planeB.output.priority) if(auto color = planeB.output.color) output = color;
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if(planeA.output.priority) if(auto color = planeA.output.color) output = color;
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if(sprite.output.priority) if(auto color = sprite.output.color) output = color;
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outputPixel(cram.read(output));
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state.hdot++;
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}
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auto VDP::outputPixel(uint9 color) -> void {
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for(auto n : range(pixelWidth())) {
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state.output[ 0 + n] = color;
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state.output[1280 + n] = color;
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}
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state.output += pixelWidth();
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}
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