void
ge_cairo_transform_for_layout (cairo_t *cr,
PangoLayout *layout,
int x,
int y)
{
const PangoMatrix *matrix;
matrix = pango_context_get_matrix (pango_layout_get_context (layout));
if (matrix)
{
cairo_matrix_t cairo_matrix;
PangoRectangle rect;
cairo_matrix_init (&cairo_matrix,
matrix->xx, matrix->yx,
matrix->xy, matrix->yy,
matrix->x0, matrix->y0);
pango_layout_get_extents (layout, NULL, &rect);
pango_matrix_transform_rectangle (matrix, &rect);
pango_extents_to_pixels (&rect, NULL);
cairo_matrix.x0 += x - rect.x;
cairo_matrix.y0 += y - rect.y;
cairo_set_matrix (cr, &cairo_matrix);
}
else
cairo_translate (cr, x, y);
}
/**
* pango_renderer_draw_layout:
* @renderer: a #PangoRenderer
* @layout: a #PangoLayout
* @x: X position of left edge of baseline, in user space coordinates
* in Pango units.
* @y: Y position of left edge of baseline, in user space coordinates
* in Pango units.
*
* Draws @layout with the specified #PangoRenderer.
*
* Since: 1.8
**/
void
pango_renderer_draw_layout (PangoRenderer *renderer,
PangoLayout *layout,
int x,
int y)
{
PangoLayoutIter *iter;
g_return_if_fail (PANGO_IS_RENDERER (renderer));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
/* We only change the matrix if the renderer isn't already
* active.
*/
if (!renderer->active_count)
{
PangoContext *context = pango_layout_get_context (layout);
pango_renderer_set_matrix (renderer,
pango_context_get_matrix (context));
}
pango_renderer_activate (renderer);
iter = pango_layout_get_iter (layout);
do
{
PangoRectangle logical_rect;
PangoLayoutLine *line;
int baseline;
line = pango_layout_iter_get_line_readonly (iter);
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
pango_renderer_draw_layout_line (renderer,
line,
x + logical_rect.x,
y + baseline);
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
pango_renderer_deactivate (renderer);
}
static void
prepare_context_for_layout (cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const PangoMatrix *matrix;
matrix = pango_context_get_matrix (pango_layout_get_context (layout));
cairo_move_to (cr, x, y);
if (matrix)
{
cairo_matrix_t cairo_matrix;
cairo_matrix_init (&cairo_matrix,
matrix->xx, matrix->yx,
matrix->xy, matrix->yy,
matrix->x0, matrix->y0);
cairo_transform (cr, &cairo_matrix);
}
}
