开罗以错误的方向渲染阿拉伯文本

Question

Cairo 从左到右而不是从右到左呈现阿拉伯文本。此外，字符没有连接。这是我的代码：

#include <cairo.h>

int main (int argc, char *argv[])
{
  cairo_t *c;
  cairo_surface_t *cs;
  cairo_font_face_t * ct;

  cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 500, 500);
  c = cairo_create (cs);

  cairo_select_font_face(c, "Arial",
      CAIRO_FONT_SLANT_NORMAL,
      CAIRO_FONT_WEIGHT_BOLD);

  cairo_set_font_size (c, 40);

  cairo_set_source_rgb (c, 255, 255, 255);
  cairo_move_to (c, 100, 100);
  cairo_show_text(c, "كيف الحال");

  cairo_surface_write_to_png (cs, "cairo.png");

  return 0;
}

这是它的样子：

第一个字母“ك”显示为左侧的第一个字符，而本应位于右侧。 'ك' 也应该连接到 'ي'。所有的字符都是单独显示的，就像英文一样。

Answer 1

好像是not possible with Cairo:

The functions with text in their name form cairo's toy text API. The toy API takes UTF-8 encoded text and is limited in its functionality to rendering simple left-to-right text with no advanced features. That means for example that most complex scripts like Hebrew, Arabic, and Indic scripts are out of question.

开罗以错误的方向渲染阿拉伯文本

Cairo rendering Arabic text in wrong direction

c

cairo