Added GTK+ images. Will hook it up to tables later.

unix/CMakeLists.txt

@@ -26,6 +26,7 @@ list(APPEND _LIBUI_SOURCES
 	unix/graphemes.c
 	unix/grid.c
 	unix/group.c
+	unix/image.c
 	unix/label.c
 	unix/main.c
 	unix/menu.c

unix/image.c

@@ -0,0 +1,59 @@
+// 27 june 2016
+#include "uipriv_unix.h"
+
+struct uiImage {
+	double width;
+	double height;
+	GPtrArray *images;
+};
+
+static void freeImageRep(gpointer item)
+{
+	cairo_surface_t *cs = (cairo_surface_t *) item;
+	unsigned char *buf;
+
+	buf = cairo_image_surface_get_data(cs);
+	cairo_surface_destroy(cs);
+	uiFree(buf);
+}
+
+uiImage *uiNewImage(double width, double height)
+{
+	uiImage *i;
+
+	i = uiNew(uiImage);
+	i->width = width;
+	i->height = height;
+	i->images = g_ptr_array_new_with_free_func(g_object_unref);
+	return i;
+}
+
+void uiFreeImage(uiImage *i)
+{
+	g_ptr_array_free(i->images, TRUE);
+	uiFree(i);
+}
+
+void uiImageAppend(uiImage *i, void *pixels, int pixelWidth, int pixelHeight, int pixelStride)
+{
+	cairo_surface_t *cs;
+	unsigned char *buf, *p;
+	uint8_t *src = (uint8_t *) pixels;
+	int cstride;
+	int y;
+
+	cstride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, pixelWidth);
+	buf = (unsigned char *) uiAlloc((cstride * pixelHeight * 4) * sizeof (unsigned char), "unsigned char[]");
+	p = buf;
+	for (y = 0; y < pixelWidth * pixelHeight; y += pixelStride) {
+		memmove(p, src + y, cstride);
+		p += cstride;
+	}
+	cs = cairo_image_surface_create_for_data(buf, CAIRO_FORMAT_ARGB32,
+		pixelWidth, pixelHeight,
+		cstride);
+	if (cairo_surface_status(cs) != CAIRO_STATUS_SUCCESS)
+		/* TODO */;
+	cairo_surface_flush(cs);
+	g_ptr_array_add(i->images, cs);
+}