57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
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//
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// Created by william on 17/05/24.
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//
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#include "pattern_table.h"
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#include "ppu.h"
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#include "../gui/canvas.h"
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#include "../gui/gui.h"
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void pt_debug() {
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Canvas *canvas = gui_get_canvas(WINDOW_ID_PATTERN);
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for (int palette = 0; palette < 2; palette++) {
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address palette_addr = palette * 0x1000;
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int palette_canvas_offset = palette * (PATTERN_TABLE_WIDTH * PATTERN_TILE_SIZE);
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for (int y = 0; y < PATTERN_TABLE_WIDTH; y++) {
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for (int x = 0; x < PATTERN_TABLE_WIDTH; x++) {
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address tile_addr = palette_addr + (x + y * PATTERN_TABLE_WIDTH) * PATTERN_TILE_MEM_SIZE;
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for (int tile_y = 0; tile_y < PATTERN_TILE_SIZE; tile_y++) {
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byte p1_data = ppu_read(tile_addr + tile_y);
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byte p2_data = ppu_read(tile_addr + tile_y + PATTERN_TILE_SIZE);
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for (int tile_x = 0; tile_x < PATTERN_TILE_SIZE; tile_x++) {
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byte bitmask = 1 << (PATTERN_TILE_SIZE - tile_x - 1);
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byte p1_byte = p1_data & bitmask;
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byte p2_byte = p2_data & bitmask;
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Pixel pixel;
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if (p1_byte && p2_byte) {
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pixel.r = 255;
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pixel.g = 255;
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pixel.b = 255;
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} else if (p2_byte) {
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pixel.r = 255;
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pixel.g = 0;
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pixel.b = 0;
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} else if (p1_byte) {
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pixel.r = 0;
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pixel.g = 255;
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pixel.b = 255;
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} else {
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pixel.r = 0;
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pixel.g = 0;
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pixel.b = 0;
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}
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int canvas_x = x * PATTERN_TILE_SIZE + tile_x;
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int canvas_y = y * PATTERN_TILE_SIZE + tile_y + palette_canvas_offset;
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canvas_draw_pos(canvas, pixel, canvas_x, canvas_y);
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}
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}
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}
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}
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}
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}
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