mirror of https://github.com/bsnes-emu/bsnes.git
95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
auto PPU::LayerWindow::render(bool screen) -> void {
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uint8* output;
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if(screen == 0) {
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output = main;
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if(main_enable == false) {
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memset(output, 0, 256);
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return;
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}
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} else {
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output = sub;
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if(sub_enable == false) {
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memset(output, 0, 256);
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return;
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}
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}
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if(one_enable == false && two_enable == false) {
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memset(output, 0, 256);
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return;
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}
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if(one_enable == true && two_enable == false) {
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bool set = 1 ^ one_invert, clr = !set;
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for(uint x = 0; x < 256; x++) {
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output[x] = (x >= ppu.regs.window_one_left && x <= ppu.regs.window_one_right) ? set : clr;
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}
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return;
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}
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if(one_enable == false && two_enable == true) {
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bool set = 1 ^ two_invert, clr = !set;
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for(uint x = 0; x < 256; x++) {
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output[x] = (x >= ppu.regs.window_two_left && x <= ppu.regs.window_two_right) ? set : clr;
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}
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return;
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}
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for(uint x = 0; x < 256; x++) {
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bool one_mask = (x >= ppu.regs.window_one_left && x <= ppu.regs.window_one_right) ^ one_invert;
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bool two_mask = (x >= ppu.regs.window_two_left && x <= ppu.regs.window_two_right) ^ two_invert;
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switch(mask) {
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case 0: output[x] = one_mask | two_mask == 1; break;
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case 1: output[x] = one_mask & two_mask == 1; break;
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case 2: output[x] = one_mask ^ two_mask == 1; break;
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case 3: output[x] = one_mask ^ two_mask == 0; break;
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}
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}
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}
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//
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auto PPU::ColorWindow::render(bool screen) -> void {
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uint8* output = (screen == 0 ? main : sub);
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bool set = 1, clr = 0;
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switch(screen == 0 ? main_mask : sub_mask) {
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case 0: memset(output, 1, 256); return; //always
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case 1: set = 1, clr = 0; break; //inside window only
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case 2: set = 0, clr = 1; break; //outside window only
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case 3: memset(output, 0, 256); return; //never
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}
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if(one_enable == false && two_enable == false) {
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memset(output, clr, 256);
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return;
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}
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if(one_enable == true && two_enable == false) {
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if(one_invert) { set ^= 1; clr ^= 1; }
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for(uint x = 0; x < 256; x++) {
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output[x] = (x >= ppu.regs.window_one_left && x <= ppu.regs.window_one_right) ? set : clr;
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}
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return;
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}
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if(one_enable == false && two_enable == true) {
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if(two_invert) { set ^= 1; clr ^= 1; }
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for(uint x = 0; x < 256; x++) {
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output[x] = (x >= ppu.regs.window_two_left && x <= ppu.regs.window_two_right) ? set : clr;
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}
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return;
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}
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for(uint x = 0; x < 256; x++) {
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bool one_mask = (x >= ppu.regs.window_one_left && x <= ppu.regs.window_one_right) ^ one_invert;
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bool two_mask = (x >= ppu.regs.window_two_left && x <= ppu.regs.window_two_right) ^ two_invert;
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switch(mask) {
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case 0: output[x] = one_mask | two_mask == 1 ? set : clr; break;
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case 1: output[x] = one_mask & two_mask == 1 ? set : clr; break;
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case 2: output[x] = one_mask ^ two_mask == 1 ? set : clr; break;
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case 3: output[x] = one_mask ^ two_mask == 0 ? set : clr; break;
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}
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}
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}
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