Autokem: CNN-based glyph labeller for Keming Machine

Autokem/tga.h

@@ -0,0 +1,33 @@
+#ifndef TGA_H
+#define TGA_H
+
+#include <stdint.h>
+#include <stdio.h>
+
+typedef struct {
+    int width;
+    int height;
+    uint32_t *pixels;       /* RGBA8888: R<<24 | G<<16 | B<<8 | A */
+    long pixel_data_offset; /* byte offset of pixel data in file */
+    int top_to_bottom;
+} TgaImage;
+
+/* Read an uncompressed 32-bit TGA file. Returns NULL on error. */
+TgaImage *tga_read(const char *path);
+
+/* Get pixel at (x,y) as RGBA8888. Returns 0 for out-of-bounds. */
+uint32_t tga_get_pixel(const TgaImage *img, int x, int y);
+
+/* Write a single pixel (RGBA8888) to TGA file on disk at (x,y).
+   Opens/closes the file internally. */
+int tga_write_pixel(const char *path, TgaImage *img, int x, int y, uint32_t rgba);
+
+/* Free a TgaImage. */
+void tga_free(TgaImage *img);
+
+/* tagify: returns 0 if alpha==0, else full pixel value */
+static inline uint32_t tagify(uint32_t pixel) {
+    return (pixel & 0xFF) == 0 ? 0 : pixel;
+}
+
+#endif