Lines Matching full:png_set_background
821 Libpng only supports composing onto a single color (using png_set_background;
1057 fire if more than one call to png_set_alpha_mode and png_set_background is
1062 png_set_background() to remove it by compositing against a fixed color. Don't
1066 png_set_background(png_ptr, &background_color,
1071 file, if you call png_set_background at this point you must arrange for the
1101 Calling png_set_background before the PNG file header is read will not work
1103 errors it is therefore much safer to call png_set_background after the head has
1214 damages the information provided by an earlier call to png_set_background
1754 version with no alpha channel use png_set_background; see below.
1804 png_set_background(), or png_strip_alpha().
1946 The png_set_background() function has been described already; it tells libpng to
1965 png_set_background(png_ptr, image_background,
1968 png_set_background(png_ptr, &my_background,
4841 composition (png_set_background for example). This applies even if the
5111 png_set_background(), that might be detected by certain regression tests.