我编写了一个chip-8模拟器。无论我做什么,似乎我都无法在屏幕上显示任何像素。奇怪的是我已经检查了代码,上下已经2天了,似乎没有有任何问题。它将 .rom 文件读入内存,并正确获取 OP 代码。
这是源代码:
SDL_SetRenderDrawColor( renderer, 0, 0, 0, SDL_ALPHA_OPAQUE );
SDL_RenderClear(renderer);
uint32_t pixels[(WINDOW_WIDTH / 10) * (WINDOW_HEIGHT / 10)];
uint16_t i;
for(i = 0; i < 64*32; i++){
pixels[i] = (0x00FFFFFF * display[i]) | 0xFF000000;
}
//upload the pixels to the texture
SDL_UpdateTexture(tex,NULL,pixels, 64 * sizeof(uint32_t));
//Now get the texture to the screen
SDL_RenderCopy(renderer,tex,NULL,NULL);
SDL_RenderPresent(renderer); // Update screen
ch8.drawF = false;
uint16_t x = ch8->V[((ch8->opcode & 0x0F00) >> 8)];
uint16_t y = ch8->V[((ch8->opcode & 0x00F0) >> 4)];
uint8_t n = (ch8->opcode & 0x000F);
for(i = 0; i < n; i++) {
uint8_t pixel= memory[ch8->I.word + i];
for(j = 0; j < 8; j++) {
if((pixel & (0x80 >> j)) != 0){
if(display[x + j + ((y + i) * 64)] == 1) {
ch8->V[0xF] = 1;
}
display[x + j + ((y + i) * 64)] ^= 1;
}
}
}