Program To Convert Image to Header Data

lib/image2inl.c

@@ -0,0 +1,74 @@
+// Coverts a supported image file to an RGBA array
+// To compile: gcc -lm -o image2inl image2inl.c
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "./stb/stb_image.h"
+
+void help(void) {
+	fprintf(stderr, "Usage: image2inl <input_file> <symbolname> <output_file>\n");
+	exit(1);
+}
+
+void convert(const char *ifname, const char *ofname, const char *symbolname) {
+	// Check if input file exists
+	FILE *ifile, *ofile;
+	ifile = fopen(ifname, "rb");
+	if (ifile == NULL) {
+		fprintf(stderr, "cannot open %s for reading\n", ifname);
+		exit(1);
+	}
+	fclose(ifile);
+
+	// Check if output location is writable
+	ofile = fopen(ofname, "wb");
+	if (ofile == NULL) {
+		fprintf(stderr, "cannot open %s for writing\n", ofname);
+		exit(1);
+	}
+
+	// use STBI_rgb if you don't want/need the alpha channel or STBI_rgb_alpha
+	int req_format = STBI_rgb_alpha;
+	int width, height, orig_format;
+	unsigned char* data = stbi_load(
+		ifname, &width, &height, &orig_format, req_format
+	);
+
+	if (data == NULL) {
+		printf("Loading image data failed: %s", stbi_failure_reason());
+		exit(1);
+	}
+
+	int c, col = 1, inc = 0, size = (width * height) * 4;
+	fprintf(ofile, "static unsigned int %s_len = %d;\n", symbolname, size);
+	fprintf(ofile, "static unsigned char %s[] = {\n", symbolname);
+
+	while (inc < size) {
+		c = data[inc];
+		if(col >= 78 - 6) {
+			fputc('\n', ofile);
+			col = 1;
+		}
+		if(col == 1) {
+			fprintf(ofile, "  ");
+		}
+		fprintf(ofile, "0x%.2x, ", c);
+		col += 6;
+		inc++;
+	}
+
+	fprintf(ofile, "\n};\n");
+	fclose(ofile);
+}
+
+int main(int argc, char **argv) {
+	if(argc != 4) {
+		help();
+	}
+	convert(argv[1], argv[3], argv[2]);
+	return 0;
+}