harfbuzz/util/helper-cairo-ansi.cc

103 lines
3.2 KiB
C++

/*
* Copyright © 2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#include "helper-cairo-ansi.hh"
#include "options.hh"
#include "ansi-print.hh"
cairo_status_t
helper_cairo_surface_write_to_ansi_stream (cairo_surface_t *surface,
cairo_write_func_t write_func,
void *closure)
{
unsigned int width = cairo_image_surface_get_width (surface);
unsigned int height = cairo_image_surface_get_height (surface);
if (cairo_image_surface_get_format (surface) != CAIRO_FORMAT_RGB24) {
cairo_surface_t *new_surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
cairo_t *cr = cairo_create (new_surface);
if (cairo_image_surface_get_format (surface) == CAIRO_FORMAT_A8) {
cairo_set_source_rgb (cr, 0., 0., 0.);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1., 1., 1.);
cairo_mask_surface (cr, surface, 0, 0);
} else {
cairo_set_source_rgb (cr, 1., 1., 1.);
cairo_paint (cr);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
}
cairo_destroy (cr);
surface = new_surface;
} else
cairo_surface_reference (surface);
unsigned int stride = cairo_image_surface_get_stride (surface);
const uint32_t *data = (uint32_t *) (void *) cairo_image_surface_get_data (surface);
/* We don't have rows to spare on the terminal window...
* Find the tight image top/bottom and only print in between. */
/* Use corner color as background color. */
uint32_t bg_color = * (uint32_t *) data;
/* Drop first row while empty */
while (height)
{
unsigned int i;
for (i = 0; i < width; i++)
if (data[i] != bg_color)
break;
if (i < width)
break;
data += stride / 4;
height--;
}
/* Drop last row while empty */
unsigned int orig_height = height;
while (height)
{
const uint32_t *row = data + (height - 1) * stride / 4;
unsigned int i;
for (i = 0; i < width; i++)
if (row[i] != bg_color)
break;
if (i < width)
break;
height--;
}
if (height < orig_height)
height++; /* Add one last blank row for padding. */
if (width && height)
ansi_print_image_rgb24 (data, width, height, stride / 4);
cairo_surface_destroy (surface);
return CAIRO_STATUS_SUCCESS;
}