99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
#include "devices.h"
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int screen_open(void *data, uint32_t mode) {
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ScreenDeviceData *screen = (ScreenDeviceData *)data;
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screen->window =
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SDL_CreateWindow("Reality Engine VM", SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED, screen->width, screen->height,
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SDL_WINDOW_SHOWN | SDL_WINDOW_ALLOW_HIGHDPI);
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if (!screen->window)
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return -1;
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screen->renderer = SDL_CreateRenderer(
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screen->window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
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if (!screen->renderer)
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return -1;
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screen->texture = SDL_CreateTexture(
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screen->renderer, SDL_PIXELFORMAT_RGB332, SDL_TEXTUREACCESS_STREAMING,
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screen->width, screen->height);
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if (!screen->texture)
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return -1;
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SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "0");
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return 0;
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}
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int screen_read(void *data, uint8_t *buffer, uint32_t size) { return -1; }
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int screen_write(void *data, const uint8_t *buffer, uint32_t size) {
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ScreenDeviceData *screen = (ScreenDeviceData *)data;
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if (size > screen->framebuffer_size * sizeof(uint8_t)) {
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return -1;
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}
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memcpy(&screen->vm->memory[screen->framebuffer_pos], buffer, size);
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return 0;
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}
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int screen_close(void *data) {
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ScreenDeviceData *screen = (ScreenDeviceData *)data;
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if (screen->texture) {
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SDL_DestroyTexture(screen->texture);
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screen->texture = NULL;
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}
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if (screen->renderer) {
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SDL_DestroyRenderer(screen->renderer);
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screen->renderer = NULL;
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}
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if (screen->window) {
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SDL_DestroyWindow(screen->window);
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screen->window = NULL;
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}
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return 0;
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}
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/* MOUSE */
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int mouse_open(void *data, uint32_t mode) { return 0; }
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int mouse_read(void *data, uint8_t *buffer, uint32_t size) {
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MouseDeviceData *mouse = (MouseDeviceData *)data;
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if (size < 3 * sizeof(uint32_t))
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return -1;
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uint32_t *out = (uint32_t *)buffer;
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out[0] = mouse->x;
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out[1] = mouse->y;
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out[2] = (mouse->btn1 | (mouse->btn2 << 1) | (mouse->btn3 << 2) |
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(mouse->btn4 << 3));
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return 0;
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}
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int mouse_write(void *data, const uint8_t *buffer, uint32_t size) { return -1; }
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int mouse_close(void *data) { return 0; }
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int keyboard_open(void *data, uint32_t mode) { return 0; }
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int keyboard_read(void *data, uint8_t *buffer, uint32_t size) {
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KeyboardDeviceData *kbd = (KeyboardDeviceData *)data;
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if (size < (uint32_t)kbd->key_count)
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return -1;
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memcpy(buffer, kbd->keys, kbd->key_count);
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return 0;
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}
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int keyboard_write(void *data, const uint8_t *buffer, uint32_t size) {
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return -1; /* not writable */
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}
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int keyboard_close(void *data) { return 0; }
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