186 static int tick_type(png_bytep p, bool transparent, const char** outError)  in tick_type()  argument
203 …          *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)";  in tick_type()
207             *outError = "Ticks in transparent frame must be black or red";  in tick_type()
213         *outError = "White frame must be a solid color (no alpha)";  in tick_type()
226         *outError = "Ticks in white frame must be black or red";  in tick_type()
240         int32_t* outLeft, int32_t* outRight, const char** outError,  in get_horizontal_ticks()  argument
249         if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) {  in get_horizontal_ticks()
260                 *outError = "Can't have more than one marked region along edge";  in get_horizontal_ticks()
264         } else if (*outError == NULL) {  in get_horizontal_ticks()
279         *outError = "No marked region found along edge";  in get_horizontal_ticks()
289         int32_t* outTop, int32_t* outBottom, const char** outError,  in get_vertical_ticks()  argument
298         if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) {  in get_vertical_ticks()
309                 *outError = "Can't have more than one marked region along edge";  in get_vertical_ticks()
313         } else if (*outError == NULL) {  in get_vertical_ticks()
328         *outError = "No marked region found along edge";  in get_vertical_ticks()
338         int32_t* outLeft, int32_t* outRight, const char** outError)  in get_horizontal_layout_bounds_ticks()  argument
344     if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) {  in get_horizontal_layout_bounds_ticks()
350             int tick = tick_type(row + i * 4, transparent, outError);  in get_horizontal_layout_bounds_ticks()
358     if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) {  in get_horizontal_layout_bounds_ticks()
364             int tick = tick_type(row+i*4, transparent, outError);  in get_horizontal_layout_bounds_ticks()
376         int32_t* outTop, int32_t* outBottom, const char** outError)  in get_vertical_layout_bounds_ticks()  argument
382     if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) {  in get_vertical_layout_bounds_ticks()
388             int tick = tick_type(rows[i] + offset, transparent, outError);  in get_vertical_layout_bounds_ticks()
396     if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) {  in get_vertical_layout_bounds_ticks()
402             int tick = tick_type(rows[i] + offset, transparent, outError);  in get_vertical_layout_bounds_ticks()