239 void
240 do_output (PangoContext *context,
241 RenderCallback render_cb,
242 TransformCallback transform_cb,
243 gpointer cb_context,
244 gpointer cb_data,
245 int *width_out,
246 int *height_out)
247{
248 PangoLayout *layout;
249 PangoRectangle rect;
250 PangoMatrix matrix = PANGO_MATRIX_INIT;
251 PangoMatrix *orig_matrix;
252 gboolean supports_matrix;
253 int rotated_width, rotated_height;
254 int x = opt_margin_l;
255 int y = opt_margin_t;
256 int width, height;
257
258 width = 0;
259 height = 0;
260
261 orig_matrix = pango_matrix_copy (pango_context_get_matrix (context));
262
265 supports_matrix = !orig_matrix ||
266 (orig_matrix->xx != 0. || orig_matrix->xy != 0. ||
267 orig_matrix->yx != 0. || orig_matrix->yy != 0. ||
268 orig_matrix->x0 != 0. || orig_matrix->y0 != 0.);
269
270 set_transform (context, transform_cb, cb_context, cb_data, NULL);
271
272 pango_context_set_language (context,
273 opt_language ? pango_language_from_string (opt_language)
274 : pango_language_get_default ());
275 pango_context_set_base_dir (context,
276 opt_rtl ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR);
277
278 if (opt_header)
279 {
280 char *options_string = get_options_string ();
281 pango_context_set_base_gravity (context, PANGO_GRAVITY_SOUTH);
282 layout = make_layout (context, options_string, 10);
283 pango_layout_get_extents (layout, NULL, &rect);
284
285 width = MAX (width, PANGO_PIXELS (rect.width));
286 height += PANGO_PIXELS (rect.height);
287
288 if (render_cb)
289 (*render_cb) (layout, x, y, cb_context, cb_data);
290
291 y += PANGO_PIXELS (rect.height);
292
293 g_object_unref (layout);
294 g_free (options_string);
295 }
296
297 if (opt_rotate != 0)
298 {
299 if (supports_matrix)
300 pango_matrix_rotate (&matrix, opt_rotate);
301 else
302 g_printerr ("The backend does not support rotated text\n");
303 }
304
305 pango_context_set_base_gravity (context, opt_gravity);
306 pango_context_set_gravity_hint (context, opt_gravity_hint);
307
308 layout = make_layout (context, text, -1);
309
310 set_transform (context, transform_cb, cb_context, cb_data, &matrix);
311
312 output_body (layout,
313 NULL, NULL, NULL,
314 &rotated_width, &rotated_height,
315 supports_matrix);
316
317 rect.x = rect.y = 0;
318 rect.width = rotated_width;
319 rect.height = rotated_height;
320
321 pango_matrix_transform_pixel_rectangle (&matrix, &rect);
322
323 matrix.x0 = x - rect.x;
324 matrix.y0 = y - rect.y;
325
326 set_transform (context, transform_cb, cb_context, cb_data, &matrix);
327
328 if (render_cb)
329 output_body (layout,
330 render_cb, cb_context, cb_data,
331 &rotated_width, &rotated_height,
332 supports_matrix);
333
334 width = MAX (width, rect.width);
335 height += rect.height;
336
337 width += opt_margin_l + opt_margin_r;
338 height += opt_margin_t + opt_margin_b;
339
340 if (width_out)
341 *width_out = width;
342 if (height_out)
343 *height_out = height;
344
345 pango_context_set_matrix (context, orig_matrix);
346 pango_matrix_free (orig_matrix);
347 g_object_unref (layout);
348}
349
