107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
//
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// Created by william on 7/12/24.
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//
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#include <assert.h>
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#include <stdbool.h>
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#include <string.h>
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#include "dbg_pattern_table.h"
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#include "../include/ppu.h"
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#include "../include/system.h"
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#include "dbg_palette.h"
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DebugPatternTable pattern_table;
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void dbg_pattern_table_build_bank(DebugPattern *bank, byte *pattern_memory) {
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for (int tile_index = 0; tile_index < PATTERN_TABLE_SIZE; tile_index++) {
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DebugPattern *pattern = &bank[tile_index];
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address tile_addr = tile_index * PATTERN_BYTES;
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memcpy(pattern->data_low, &pattern_memory[tile_addr], PATTERN_SIZE);
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memcpy(pattern->data_high, &pattern_memory[tile_addr + PATTERN_SIZE], PATTERN_SIZE);
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}
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}
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void dbg_pattern_table_init() {
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byte *pattern_memory = system_get_mapper()->ppu_read(0);
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dbg_pattern_table_build_bank(pattern_table.bank_0, pattern_memory);
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dbg_pattern_table_build_bank(pattern_table.bank_1, &pattern_memory[PATTERN_BANK_SIZE]);
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}
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DebugPattern dbg_pattern_get(int pattern_id, int bank) {
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// TODO Should not use same bank
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switch (bank) {
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case PATTERN_BANK_0:
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return pattern_table.bank_1[pattern_id];
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case PATTERN_BANK_1:
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return pattern_table.bank_1[pattern_id];
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default:
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assert(false);
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}
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}
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DebugPattern dbg_pattern_get_pos(int x, int y, int bank) {
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assert(x >= 0);
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assert(x < PATTERN_TABLE_WIDTH);
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assert(y >= 0);
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assert(y < PATTERN_TABLE_WIDTH);
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address pattern_addr = x + y * PATTERN_TABLE_WIDTH;
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return dbg_pattern_get(pattern_addr, bank);
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}
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void dbg_pattern_draw_borders(pixel *buffer, int buffer_width) {
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for (int by = 0; by < PATTERN_DRAW_SIZE; by++) {
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address pixel_addr = (by * buffer_width) + PATTERN_DRAW_SIZE - 1;
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buffer[pixel_addr] = PATTERN_BORDER_COLOR;
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}
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for (int bx = 0; bx < PATTERN_DRAW_SIZE; bx++) {
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address pixel_addr = ((PATTERN_DRAW_SIZE - 1) * buffer_width) + bx;
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buffer[pixel_addr] = PATTERN_BORDER_COLOR;
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}
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}
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void dbg_pattern_draw_pattern(DebugPattern pattern, pixel *buffer, int buffer_width, byte palette) {
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for (int fine_y = 0; fine_y < PATTERN_SIZE; fine_y++) {
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byte data_high = pattern.data_high[fine_y];
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byte data_low = pattern.data_low[fine_y];
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for (int fine_x = 0; fine_x < PATTERN_SIZE; fine_x++) {
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byte offset = PATTERN_SIZE - fine_x - 1;
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byte bit_high = (data_high >> offset) & 1;
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byte bit_low = (data_low >> offset) & 1;
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address pixel_addr = fine_x + fine_y * buffer_width;
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byte palette_data = (bit_high << 1) | bit_low;
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buffer[pixel_addr] = dbg_get_background_color(palette, palette_data);
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}
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}
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dbg_pattern_draw_borders(buffer, buffer_width);
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}
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void dbg_pattern_draw(int pattern_id, int bank, pixel *buffer, int buffer_width, int palette) {
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DebugPattern pattern = dbg_pattern_get(pattern_id, bank);
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dbg_pattern_draw_pattern(pattern, buffer, buffer_width, palette);
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}
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void dbg_pattern_draw_pos(int x, int y, int bank, pixel *buffer, int buffer_width, int palette) {
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DebugPattern pattern = dbg_pattern_get_pos(x, y, bank);
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dbg_pattern_draw_pattern(pattern, buffer, buffer_width, palette);
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}
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void dbg_pattern_draw_bank(int bank, pixel *buffer, int palette) {
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int buffer_width = PATTERN_TABLE_WIDTH * PATTERN_DRAW_SIZE;
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for (int x = 0; x < PATTERN_TABLE_WIDTH; x++) {
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for (int y = 0; y < PATTERN_TABLE_WIDTH; y++) {
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address row_addr = (y * PATTERN_DRAW_SIZE) * buffer_width;
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address tile_addr = row_addr + (x * PATTERN_DRAW_SIZE);
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dbg_pattern_draw_pos(x, y, bank, &buffer[tile_addr], buffer_width, palette);
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}
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}
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} |