1 files changed, 62 insertions, 0 deletions
diff --git a/tests/test_image.c b/tests/test_image.c
new file mode 100644
index 0000000..c637770
--- /dev/null
+++ b/tests/test_image.c
@@ -0,0 +1,62 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include "kd_image.h"
+
+#include <stdio.h>
+#include <X11/Xutil.h>
+
+typedef struct KDTestImageHandle {
+    XImage *ximage;
+    GC clip_mask_gc;
+    Pixmap clip_mask;
+} KDTestImageHandle;
+
+int main(int argc, char **argv)
+{
+    Display *display;
+    struct nk_image image;
+    KDTestImageHandle *handle;
+    Visual *visual;
+    unsigned long first_pixel;
+    unsigned long second_pixel;
+
+    if (argc != 3) {
+        (void)fprintf(stderr, "Usage: %s red-green-p3.ppm red-green-p6.ppm\n", argv[0]);
+        return 2;
+    }
+    display = XOpenDisplay(NULL);
+    if (display == NULL) {
+        (void)fprintf(stderr, "Could not open DISPLAY.\n");
+        return 2;
+    }
+    image = kd_ppm_load(display, DefaultScreen(display), argv[1], 20U, 20U);
+    if (image.handle.ptr == NULL || image.w != 2U || image.h != 1U) {
+        (void)fprintf(stderr, "P3 image failed to load.\n");
+        XCloseDisplay(display);
+        return 1;
+    }
+    handle = (KDTestImageHandle *)image.handle.ptr;
+    visual = DefaultVisual(display, DefaultScreen(display));
+    first_pixel = XGetPixel(handle->ximage, 0, 0);
+    second_pixel = XGetPixel(handle->ximage, 1, 0);
+    if ((first_pixel & visual->red_mask) == 0UL ||
+        (first_pixel & visual->green_mask) != 0UL ||
+        (second_pixel & visual->green_mask) == 0UL ||
+        (second_pixel & visual->red_mask) != 0UL) {
+        (void)fprintf(stderr, "P3 pixel colors were incorrect.\n");
+        kd_ppm_free(&image);
+        XCloseDisplay(display);
+        return 1;
+    }
+    kd_ppm_free(&image);
+    image = kd_ppm_load(display, DefaultScreen(display), argv[2], 20U, 20U);
+    if (image.handle.ptr == NULL || image.w != 2U || image.h != 1U) {
+        (void)fprintf(stderr, "P6 image failed to load.\n");
+        XCloseDisplay(display);
+        return 1;
+    }
+    kd_ppm_free(&image);
+    XCloseDisplay(display);
+    (void)puts("PASS: P3/P6 PPM decoding and XImage pixels");
+    return 0;
+}