Fixed graphical glitches caused by the last change to LCDC emulation
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6f73ee053d
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5723b82293
@ -327,7 +327,7 @@ void display_run(GB_gameboy_t *gb)
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// LY = 144 interrupt bug
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// LY = 144 interrupt bug
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if (gb->io_registers[GB_IO_LY] == 144) {
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if (gb->io_registers[GB_IO_LY] == 144) {
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/* User requests an interrupt on Mode 2 */
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/* User requests an interrupt on Mode 2 */
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if (gb->display_cycles % LINE_LENGTH < 92 && gb->io_registers[GB_IO_STAT] & 0x20) { // Mode 2
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if (gb->display_cycles % LINE_LENGTH < MODE2_LENGTH && gb->io_registers[GB_IO_STAT] & 0x20) { // Mode 2
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gb->stat_interrupt_line = true;
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gb->stat_interrupt_line = true;
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}
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}
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}
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}
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@ -357,21 +357,22 @@ void display_run(GB_gameboy_t *gb)
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goto updateSTAT;
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goto updateSTAT;
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}
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}
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if (gb->display_cycles % LINE_LENGTH < MODE2_LENGTH + MODE3_LENGTH) { /* Mode 3 */
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if (last_mode != 3) {
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/* Render. This chunk is outside the Mode 3 if, because otherwise we might not render some pixels, since this
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function only runs between atomic CPU changes, and not every clock. */
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signed short current_lcdc_x = ((gb->display_cycles % LINE_LENGTH - MODE2_LENGTH) & ~7) - (gb->effective_scx & 0x7);
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for (;gb->previous_lcdc_x < current_lcdc_x; gb->previous_lcdc_x++) {
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if (gb->previous_lcdc_x >= 160) {
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continue;
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}
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}
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signed short current_lcdc_x = ((gb->display_cycles % LINE_LENGTH - MODE2_LENGTH) & ~7) - (gb->effective_scx & 0x7);
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if (gb->previous_lcdc_x < 0) {
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for (;gb->previous_lcdc_x < current_lcdc_x; gb->previous_lcdc_x++) {
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continue;
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if (gb->previous_lcdc_x >= 160) {
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continue;
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}
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if (gb->previous_lcdc_x < 0) {
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continue;
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}
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gb->screen[gb->io_registers[GB_IO_LY] * 160 + gb->previous_lcdc_x] =
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get_pixel(gb, gb->previous_lcdc_x, gb->io_registers[GB_IO_LY]);
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}
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}
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gb->screen[gb->io_registers[GB_IO_LY] * 160 + gb->previous_lcdc_x] =
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get_pixel(gb, gb->previous_lcdc_x, gb->io_registers[GB_IO_LY]);
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}
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if (gb->display_cycles % LINE_LENGTH < MODE2_LENGTH + MODE3_LENGTH) { /* Mode 3 */
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gb->io_registers[GB_IO_STAT] |= 3; /* Set mode to 3 */
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gb->io_registers[GB_IO_STAT] |= 3; /* Set mode to 3 */
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goto updateSTAT;
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goto updateSTAT;
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}
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}
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