add gb.h, add gb_init(), gb_get_rgb_frame(), disable bios

1 files changed, 96 insertions, 0 deletions

diff --git a/test.c b/test.c
new file mode 100644
index 0000000..32f0474
--- /dev/null
+++ b/test.c
@@ -0,0 +1,96 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include "lodepng.h"
+#include "gb.h"
+
+#define NUM_FRAMES 600
+
+static uint32_t
+file_size(
+  const char * const path
+) {
+  struct stat st;
+
+  if (stat(path, &st)) {
+    perror("stat():");
+    exit(EXIT_FAILURE);
+  }
+
+  return st.st_size;
+}
+
+static const uint8_t *
+load(
+  const char * const path,
+  uint32_t * const r_file_size
+) {
+  const uint32_t rom_size = file_size(path);
+  uint8_t *rom_data = malloc(rom_size);
+  if (!rom_data) {
+    perror("malloc():");
+    exit(EXIT_FAILURE);
+  }
+
+  FILE *fh = fopen(path, "rb");
+  if (!fh) {
+    perror("fopen():");
+    exit(EXIT_FAILURE);
+  }
+
+  if (!fread(rom_data, rom_size, 1, fh)) {
+    perror("fread():");
+    exit(EXIT_FAILURE);
+  }
+
+  fclose(fh);
+
+  if (r_file_size) {
+    *r_file_size = (uint32_t) rom_size;
+  }
+  
+  return rom_data;
+}
+
+// buffer for rendered frames
+static uint8_t frames[NUM_FRAMES * GB_FRAME_SIZE];
+
+int main(int argc, char *argv[]) {
+  for (int i = 1; i < argc; i++) {
+    uint32_t rom_size = 0;
+    const uint8_t *rom_data = load(argv[i], &rom_size);
+    fprintf(stderr, "loaded \"%s\" (%u bytes)\n", argv[i], rom_size);
+
+    gb_t ctx;
+    gb_init(&ctx, rom_data, rom_size);
+    fprintf(stderr, "gb context initialized\n");
+
+    // render several frames
+    for (size_t j = 0; j < NUM_FRAMES; j++) {
+      // render frame
+      gb_frame(&ctx);
+
+      // copy frame to buffer
+      memcpy(frames + GB_FRAME_SIZE * j, gb_get_rgb_frame(&ctx), GB_FRAME_SIZE);
+    }
+
+    // save png
+    if (lodepng_encode24_file("out.png", frames, 160, 144 * NUM_FRAMES)) {
+      fprintf(stderr, "lode_png_encode24_file() failed\n");
+      return EXIT_FAILURE;
+    }
+
+    fprintf(stderr, "%d frames rendered\n", NUM_FRAMES);
+
+    // free rom data
+    free((void*) rom_data);
+  }
+
+  // return success
+  return 0;
+}