diff --git a/src/libandroid/bitmap.c b/src/libandroid/bitmap.c
index 4d6010de..5260d372 100644
--- a/src/libandroid/bitmap.c
+++ b/src/libandroid/bitmap.c
@@ -1,18 +1,32 @@
+#include <gtk/gtk.h>
+#include <jni.h>
 
-typedef void JNIEnv;
-typedef void AndroidBitmapInfo;
-typedef void* jobject;
+// FIXME: put the header in a common place
+#include "../api-impl-jni/defines.h"
 
 #define ANDROID_BITMAP_RESULT_SUCCESS 0
 
+struct AndroidBitmapInfo {
+	uint32_t width;
+	uint32_t height;
+	uint32_t stride;
+	int32_t  format;
+	uint32_t flags;
+};
 
-int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap,
-                          AndroidBitmapInfo* info) {
-    return ANDROID_BITMAP_RESULT_SUCCESS;
+int AndroidBitmap_getInfo(JNIEnv* env, jobject bitmap, struct AndroidBitmapInfo *info) {
+	GdkPixbuf *pixbuf = _PTR(_GET_LONG_FIELD(bitmap, "pixbuf"));
+	info->width = gdk_pixbuf_get_width(pixbuf);
+	info->height = gdk_pixbuf_get_height(pixbuf);
+	info->stride = gdk_pixbuf_get_rowstride(pixbuf);
+	info->format = 1; // ANDROID_BITMAP_FORMAT_RGBA_8888
+	return ANDROID_BITMAP_RESULT_SUCCESS;
 }
-int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr) {
-    return ANDROID_BITMAP_RESULT_SUCCESS;
+int AndroidBitmap_lockPixels(JNIEnv* env, jobject bitmap, void** pixels) {
+	GdkPixbuf *pixbuf = _PTR(_GET_LONG_FIELD(bitmap, "pixbuf"));
+	*pixels = gdk_pixbuf_get_pixels(pixbuf);
+	return ANDROID_BITMAP_RESULT_SUCCESS;
 }
-int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap) {
-    return ANDROID_BITMAP_RESULT_SUCCESS;
+int AndroidBitmap_unlockPixels(JNIEnv* env, jobject bitmap) {
+	return ANDROID_BITMAP_RESULT_SUCCESS;
 }