Lines Matching refs:png_set_background

827 Libpng only supports composing onto a single color (using png_set_background;
1072 fire if more than one call to png_set_alpha_mode and png_set_background is
1077 png_set_background() to remove it by compositing against a fixed color.  Don't
1081    png_set_background(png_ptr, &background_color,
1086 file, if you call png_set_background at this point you must arrange for the
1116 Calling png_set_background before the PNG file header is read will not work
1118 errors it is therefore much safer to call png_set_background after the head has
1242 damages the information provided by an earlier call to png_set_background
1792 version with no alpha channel use png_set_background; see below.
1842          png_set_background(), or png_strip_alpha().
1984 The png_set_background() function has been described already; it tells libpng to
2003        png_set_background(png_ptr, image_background,
2006        png_set_background(png_ptr, &my_background,
4911 composition (png_set_background for example). This applies even if the
5177 png_set_background(), that might be detected by certain regression tests.