Lines Matching refs:png_set_background

817 Libpng only supports composing onto a single color (using png_set_background;
1053 fire if more than one call to png_set_alpha_mode and png_set_background is
1058 png_set_background() to remove it by compositing against a fixed color.  Don't
1062    png_set_background(png_ptr, &background_color,
1067 file, if you call png_set_background at this point you must arrange for the
1097 Calling png_set_background before the PNG file header is read will not work
1099 errors it is therefore much safer to call png_set_background after the head has
1210 damages the information provided by an earlier call to png_set_background
1749 version with no alpha channel use png_set_background; see below.
1799          png_set_background(), or png_strip_alpha().
1940 The png_set_background() function has been described already; it tells libpng to
1959        png_set_background(png_ptr, image_background,
1962        png_set_background(png_ptr, &my_background,
4897 composition (png_set_background for example). This applies even if the
5223 png_set_background(), that might be detected by certain regression tests.