387
388
* \return true if succeeded (or if no action was taken), false if an error occurred.
390
bool sp_export_png_file (SPDocument *doc, gchar const *filename,
391
double x0, double y0, double x1, double y1,
392
unsigned long int width, unsigned long int height, double xdpi, double ydpi,
393
unsigned long bgcolor,
394
unsigned int (*status) (float, void *),
395
void *data, bool force_overwrite,
398
return sp_export_png_file(doc, filename, Geom::Rect(Geom::Point(x0,y0),Geom::Point(x1,y1)),
399
width, height, xdpi, ydpi, bgcolor, status, data, force_overwrite, items_only);
390
402
sp_export_png_file(SPDocument *doc, gchar const *filename,
391
double x0, double y0, double x1, double y1,
403
Geom::Rect const &area,
392
404
unsigned long width, unsigned long height, double xdpi, double ydpi,
393
405
unsigned long bgcolor,
394
406
unsigned (*status)(float, void *),
399
411
g_return_val_if_fail(filename != NULL, false);
400
412
g_return_val_if_fail(width >= 1, false);
401
413
g_return_val_if_fail(height >= 1, false);
403
if (!force_overwrite && !sp_ui_overwrite_file(filename)) {
414
g_return_val_if_fail(!area.hasZeroArea(), false);
416
//Make relative paths absolute, if possible:
418
if (!g_path_is_absolute(filename) && doc->uri) {
419
gchar *dirname = g_path_get_dirname(doc->uri);
421
path = g_build_filename(dirname, filename, NULL);
426
path = g_strdup(filename);
429
if (!force_overwrite && !sp_ui_overwrite_file(path)) {
404
430
/* Remark: We return true so as not to invoke an error dialog in case export is cancelled
405
431
by the user; currently this is safe because the callers only act when false is returned.
406
432
If this changes in the future we need better distinction of return types (e.g., use int)
418
444
sp_document_ensure_up_to_date(doc);
420
/* Go to document coordinates */
422
gdouble const t = y0;
423
y0 = sp_document_height(doc) - y1;
424
y1 = sp_document_height(doc) - t;
446
/* Calculate translation by transforming to document coordinates (flipping Y)*/
447
Geom::Point translation = Geom::Point(-area[Geom::X][0], area[Geom::Y][1] - sp_document_height(doc));
449
/* This calculation is only valid when assumed that (x0,y0)= area.corner(0) and (x1,y1) = area.corner(2)
428
450
* 1) a[0] * x0 + a[2] * y1 + a[4] = 0.0
429
451
* 2) a[1] * x0 + a[3] * y1 + a[5] = 0.0
430
452
* 3) a[0] * x1 + a[2] * y1 + a[4] = width
440
462
* (2) a[5] = -a[3] * y1
443
Geom::Matrix const affine(Geom::Translate(-x0, -y0)
444
* Geom::Scale(width / (x1 - x0),
445
height / (y1 - y0)));
465
Geom::Matrix const affine(Geom::Translate(translation)
466
* Geom::Scale(width / area.width(),
467
height / area.height()));
447
469
//SP_PRINT_MATRIX("SVG2PNG", &affine);
475
497
if ((width < 256) || ((width * height) < 32768)) {
476
498
ebp.px = nr_pixelstore_64K_new(FALSE, 0);
477
499
ebp.sheight = 65536 / (4 * width);
478
write_status = sp_png_write_rgba_striped(doc, filename, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
500
write_status = sp_png_write_rgba_striped(doc, path, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
479
501
nr_pixelstore_64K_free(ebp.px);
481
503
ebp.px = g_new(guchar, 4 * 64 * width);
482
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ebp.sheight = 64;
483
write_status = sp_png_write_rgba_striped(doc, filename, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
505
write_status = sp_png_write_rgba_striped(doc, path, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
added
removed
src/helper/png-write.cpp
