mirror of https://github.com/bsnes-emu/bsnes.git
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
auto VDP::scanline() -> void {
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state.x = 0;
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if(++state.y >= 262) state.y = 0;
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if(state.y == 0) scheduler.exit(Scheduler::Event::Frame);
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if(state.y == 0) {
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sprite.frame();
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}
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if(state.y < 240) {
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planeA.scanline(state.y);
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window.scanline(state.y);
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planeB.scanline(state.y);
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sprite.scanline(state.y);
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}
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state.output = buffer + (state.y * 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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bool windowed = false; //todo: broken
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windowed &= state.x >= io.windowHorizontalLo && state.x <= io.windowHorizontalHi;
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windowed &= state.y >= io.windowVerticalLo && state.y <= io.windowVerticalHi;
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auto& planeA = windowed ? this->window : this->planeA;
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planeA.run(state.x, state.y);
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planeB.run(state.x, state.y);
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sprite.run(state.x, state.y);
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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[output]);
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state.x++;
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}
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auto VDP::outputPixel(uint9 color) -> void {
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for(auto n : range(4)) {
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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 += 4;
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}
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