| /* | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| /* pngget.c - retrieval of values from info struct | |
| * | |
| * This file is available under and governed by the GNU General Public | |
| * License version 2 only, as published by the Free Software Foundation. | |
| * However, the following notice accompanied the original version of this | |
| * file and, per its terms, should not be removed: | |
| * | |
| * Copyright (c) 2018-2024 Cosmin Truta | |
| * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson | |
| * Copyright (c) 1996-1997 Andreas Dilger | |
| * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. | |
| * | |
| * This code is released under the libpng license. | |
| * For conditions of distribution and use, see the disclaimer | |
| * and license in png.h | |
| * | |
| */ | |
| #include "pngpriv.h" | |
| #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) | |
| png_uint_32 PNGAPI | |
| png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32 flag) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| { | |
| #ifdef PNG_READ_tRNS_SUPPORTED | |
| /* png_handle_PLTE() may have canceled a valid tRNS chunk but left the | |
| * 'valid' flag for the detection of duplicate chunks. Do not report a | |
| * valid tRNS chunk in this case. | |
| */ | |
| if (flag == PNG_INFO_tRNS && png_ptr->num_trans == 0) | |
| return 0; | |
| #endif | |
| return info_ptr->valid & flag; | |
| } | |
| return 0; | |
| } | |
| size_t PNGAPI | |
| png_get_rowbytes(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->rowbytes; | |
| return 0; | |
| } | |
| #ifdef PNG_INFO_IMAGE_SUPPORTED | |
| png_bytepp PNGAPI | |
| png_get_rows(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->row_pointers; | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_EASY_ACCESS_SUPPORTED | |
| /* Easy access to info, added in libpng-0.99 */ | |
| png_uint_32 PNGAPI | |
| png_get_image_width(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->width; | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_image_height(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->height; | |
| return 0; | |
| } | |
| png_byte PNGAPI | |
| png_get_bit_depth(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->bit_depth; | |
| return 0; | |
| } | |
| png_byte PNGAPI | |
| png_get_color_type(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->color_type; | |
| return 0; | |
| } | |
| png_byte PNGAPI | |
| png_get_filter_type(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->filter_type; | |
| return 0; | |
| } | |
| png_byte PNGAPI | |
| png_get_interlace_type(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->interlace_type; | |
| return 0; | |
| } | |
| png_byte PNGAPI | |
| png_get_compression_type(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->compression_type; | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_x_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp | |
| info_ptr) | |
| { | |
| #ifdef PNG_pHYs_SUPPORTED | |
| png_debug(1, "in png_get_x_pixels_per_meter"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) | |
| return info_ptr->x_pixels_per_unit; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_y_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp | |
| info_ptr) | |
| { | |
| #ifdef PNG_pHYs_SUPPORTED | |
| png_debug(1, "in png_get_y_pixels_per_meter"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) | |
| return info_ptr->y_pixels_per_unit; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_pHYs_SUPPORTED | |
| png_debug(1, "in png_get_pixels_per_meter"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER && | |
| info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit) | |
| return info_ptr->x_pixels_per_unit; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| float PNGAPI | |
| png_get_pixel_aspect_ratio(png_const_structrp png_ptr, png_const_inforp | |
| info_ptr) | |
| { | |
| #ifdef PNG_READ_pHYs_SUPPORTED | |
| png_debug(1, "in png_get_pixel_aspect_ratio"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (info_ptr->x_pixels_per_unit != 0) | |
| return (float)info_ptr->y_pixels_per_unit | |
| / (float)info_ptr->x_pixels_per_unit; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return (float)0.0; | |
| } | |
| #endif | |
| #ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_fixed_point PNGAPI | |
| png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr, | |
| png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_READ_pHYs_SUPPORTED | |
| png_debug(1, "in png_get_pixel_aspect_ratio_fixed"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0 && | |
| info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 && | |
| info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX && | |
| info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX) | |
| { | |
| png_fixed_point res; | |
| /* The following casts work because a PNG 4 byte integer only has a valid | |
| * range of 0..2^31-1; otherwise the cast might overflow. | |
| */ | |
| if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1, | |
| (png_int_32)info_ptr->x_pixels_per_unit) != 0) | |
| return res; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| #endif | |
| png_int_32 PNGAPI | |
| png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_oFFs_SUPPORTED | |
| png_debug(1, "in png_get_x_offset_microns"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_oFFs) != 0) | |
| { | |
| if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) | |
| return info_ptr->x_offset; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| png_int_32 PNGAPI | |
| png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_oFFs_SUPPORTED | |
| png_debug(1, "in png_get_y_offset_microns"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_oFFs) != 0) | |
| { | |
| if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) | |
| return info_ptr->y_offset; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| png_int_32 PNGAPI | |
| png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_oFFs_SUPPORTED | |
| png_debug(1, "in png_get_x_offset_pixels"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_oFFs) != 0) | |
| { | |
| if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) | |
| return info_ptr->x_offset; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| png_int_32 PNGAPI | |
| png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| #ifdef PNG_oFFs_SUPPORTED | |
| png_debug(1, "in png_get_y_offset_pixels"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_oFFs) != 0) | |
| { | |
| if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) | |
| return info_ptr->y_offset; | |
| } | |
| #else | |
| PNG_UNUSED(png_ptr) | |
| PNG_UNUSED(info_ptr) | |
| #endif | |
| return 0; | |
| } | |
| #ifdef PNG_INCH_CONVERSIONS_SUPPORTED | |
| static png_uint_32 | |
| ppi_from_ppm(png_uint_32 ppm) | |
| { | |
| #if 0 | |
| /* The conversion is *(2.54/100), in binary (32 digits): | |
| * .00000110100000001001110101001001 | |
| */ | |
| png_uint_32 t1001, t1101; | |
| ppm >>= 1; /* .1 */ | |
| t1001 = ppm + (ppm >> 3); /* .1001 */ | |
| t1101 = t1001 + (ppm >> 1); /* .1101 */ | |
| ppm >>= 20; /* .000000000000000000001 */ | |
| t1101 += t1101 >> 15; /* .1101000000000001101 */ | |
| t1001 >>= 11; /* .000000000001001 */ | |
| t1001 += t1001 >> 12; /* .000000000001001000000001001 */ | |
| ppm += t1001; /* .000000000001001000001001001 */ | |
| ppm += t1101; /* .110100000001001110101001001 */ | |
| return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */ | |
| #else | |
| /* The argument is a PNG unsigned integer, so it is not permitted | |
| * to be bigger than 2^31. | |
| */ | |
| png_fixed_point result; | |
| if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127, | |
| 5000) != 0) | |
| return (png_uint_32)result; | |
| /* Overflow. */ | |
| return 0; | |
| #endif | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr)); | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_x_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr)); | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_y_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr)); | |
| } | |
| #ifdef PNG_FIXED_POINT_SUPPORTED | |
| static png_fixed_point | |
| png_fixed_inches_from_microns(png_const_structrp png_ptr, png_int_32 microns) | |
| { | |
| /* Convert from meters * 1,000,000 to inches * 100,000, meters to | |
| * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127. | |
| * Notice that this can overflow - a warning is output and 0 is | |
| * returned. | |
| */ | |
| png_fixed_point result; | |
| if (png_muldiv(&result, microns, 500, 127) != 0) | |
| return result; | |
| png_warning(png_ptr, "fixed point overflow ignored"); | |
| return 0; | |
| } | |
| png_fixed_point PNGAPI | |
| png_get_x_offset_inches_fixed(png_const_structrp png_ptr, | |
| png_const_inforp info_ptr) | |
| { | |
| return png_fixed_inches_from_microns(png_ptr, | |
| png_get_x_offset_microns(png_ptr, info_ptr)); | |
| } | |
| #endif /* FIXED_POINT */ | |
| #ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_fixed_point PNGAPI | |
| png_get_y_offset_inches_fixed(png_const_structrp png_ptr, | |
| png_const_inforp info_ptr) | |
| { | |
| return png_fixed_inches_from_microns(png_ptr, | |
| png_get_y_offset_microns(png_ptr, info_ptr)); | |
| } | |
| #endif | |
| #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| float PNGAPI | |
| png_get_x_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| /* To avoid the overflow do the conversion directly in floating | |
| * point. | |
| */ | |
| return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937); | |
| } | |
| #endif | |
| #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| float PNGAPI | |
| png_get_y_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| /* To avoid the overflow do the conversion directly in floating | |
| * point. | |
| */ | |
| return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937); | |
| } | |
| #endif | |
| #ifdef PNG_pHYs_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) | |
| { | |
| png_uint_32 retval = 0; | |
| png_debug1(1, "in %s retrieval function", "pHYs"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (res_x != NULL) | |
| { | |
| *res_x = info_ptr->x_pixels_per_unit; | |
| retval |= PNG_INFO_pHYs; | |
| } | |
| if (res_y != NULL) | |
| { | |
| *res_y = info_ptr->y_pixels_per_unit; | |
| retval |= PNG_INFO_pHYs; | |
| } | |
| if (unit_type != NULL) | |
| { | |
| *unit_type = (int)info_ptr->phys_unit_type; | |
| retval |= PNG_INFO_pHYs; | |
| if (*unit_type == 1) | |
| { | |
| if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); | |
| if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); | |
| } | |
| } | |
| } | |
| return retval; | |
| } | |
| #endif /* pHYs */ | |
| #endif /* INCH_CONVERSIONS */ | |
| /* png_get_channels really belongs in here, too, but it's been around longer */ | |
| #endif /* EASY_ACCESS */ | |
| png_byte PNGAPI | |
| png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->channels; | |
| return 0; | |
| } | |
| #ifdef PNG_READ_SUPPORTED | |
| png_const_bytep PNGAPI | |
| png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return info_ptr->signature; | |
| return NULL; | |
| } | |
| #endif | |
| #ifdef PNG_bKGD_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_color_16p *background) | |
| { | |
| png_debug1(1, "in %s retrieval function", "bKGD"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_bKGD) != 0 && | |
| background != NULL) | |
| { | |
| *background = &(info_ptr->background); | |
| return PNG_INFO_bKGD; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_cHRM_SUPPORTED | |
| /* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the | |
| * same time to correct the rgb grayscale coefficient defaults obtained from the | |
| * cHRM chunk in 1.5.4 | |
| */ | |
| # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| double *whitex, double *whitey, double *redx, double *redy, | |
| double *greenx, double *greeny, double *bluex, double *bluey) | |
| { | |
| png_debug1(1, "in %s retrieval function", "cHRM"); | |
| /* PNGv3: this just returns the values store from the cHRM, if any. */ | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cHRM) != 0) | |
| { | |
| if (whitex != NULL) | |
| *whitex = png_float(png_ptr, info_ptr->cHRM.whitex, "cHRM wx"); | |
| if (whitey != NULL) | |
| *whitey = png_float(png_ptr, info_ptr->cHRM.whitey, "cHRM wy"); | |
| if (redx != NULL) | |
| *redx = png_float(png_ptr, info_ptr->cHRM.redx, "cHRM rx"); | |
| if (redy != NULL) | |
| *redy = png_float(png_ptr, info_ptr->cHRM.redy, "cHRM ry"); | |
| if (greenx != NULL) | |
| *greenx = png_float(png_ptr, info_ptr->cHRM.greenx, "cHRM gx"); | |
| if (greeny != NULL) | |
| *greeny = png_float(png_ptr, info_ptr->cHRM.greeny, "cHRM gy"); | |
| if (bluex != NULL) | |
| *bluex = png_float(png_ptr, info_ptr->cHRM.bluex, "cHRM bx"); | |
| if (bluey != NULL) | |
| *bluey = png_float(png_ptr, info_ptr->cHRM.bluey, "cHRM by"); | |
| return PNG_INFO_cHRM; | |
| } | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| double *red_X, double *red_Y, double *red_Z, double *green_X, | |
| double *green_Y, double *green_Z, double *blue_X, double *blue_Y, | |
| double *blue_Z) | |
| { | |
| png_XYZ XYZ; | |
| png_debug1(1, "in %s retrieval function", "cHRM_XYZ(float)"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cHRM) != 0 && | |
| png_XYZ_from_xy(&XYZ, &info_ptr->cHRM) == 0) | |
| { | |
| if (red_X != NULL) | |
| *red_X = png_float(png_ptr, XYZ.red_X, "cHRM red X"); | |
| if (red_Y != NULL) | |
| *red_Y = png_float(png_ptr, XYZ.red_Y, "cHRM red Y"); | |
| if (red_Z != NULL) | |
| *red_Z = png_float(png_ptr, XYZ.red_Z, "cHRM red Z"); | |
| if (green_X != NULL) | |
| *green_X = png_float(png_ptr, XYZ.green_X, "cHRM green X"); | |
| if (green_Y != NULL) | |
| *green_Y = png_float(png_ptr, XYZ.green_Y, "cHRM green Y"); | |
| if (green_Z != NULL) | |
| *green_Z = png_float(png_ptr, XYZ.green_Z, "cHRM green Z"); | |
| if (blue_X != NULL) | |
| *blue_X = png_float(png_ptr, XYZ.blue_X, "cHRM blue X"); | |
| if (blue_Y != NULL) | |
| *blue_Y = png_float(png_ptr, XYZ.blue_Y, "cHRM blue Y"); | |
| if (blue_Z != NULL) | |
| *blue_Z = png_float(png_ptr, XYZ.blue_Z, "cHRM blue Z"); | |
| return PNG_INFO_cHRM; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| # ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_fixed_point *int_red_X, png_fixed_point *int_red_Y, | |
| png_fixed_point *int_red_Z, png_fixed_point *int_green_X, | |
| png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, | |
| png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, | |
| png_fixed_point *int_blue_Z) | |
| { | |
| png_XYZ XYZ; | |
| png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cHRM) != 0U && | |
| png_XYZ_from_xy(&XYZ, &info_ptr->cHRM) == 0) | |
| { | |
| if (int_red_X != NULL) *int_red_X = XYZ.red_X; | |
| if (int_red_Y != NULL) *int_red_Y = XYZ.red_Y; | |
| if (int_red_Z != NULL) *int_red_Z = XYZ.red_Z; | |
| if (int_green_X != NULL) *int_green_X = XYZ.green_X; | |
| if (int_green_Y != NULL) *int_green_Y = XYZ.green_Y; | |
| if (int_green_Z != NULL) *int_green_Z = XYZ.green_Z; | |
| if (int_blue_X != NULL) *int_blue_X = XYZ.blue_X; | |
| if (int_blue_Y != NULL) *int_blue_Y = XYZ.blue_Y; | |
| if (int_blue_Z != NULL) *int_blue_Z = XYZ.blue_Z; | |
| return PNG_INFO_cHRM; | |
| } | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_cHRM_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_fixed_point *whitex, png_fixed_point *whitey, png_fixed_point *redx, | |
| png_fixed_point *redy, png_fixed_point *greenx, png_fixed_point *greeny, | |
| png_fixed_point *bluex, png_fixed_point *bluey) | |
| { | |
| png_debug1(1, "in %s retrieval function", "cHRM"); | |
| /* PNGv3: this just returns the values store from the cHRM, if any. */ | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cHRM) != 0) | |
| { | |
| if (whitex != NULL) *whitex = info_ptr->cHRM.whitex; | |
| if (whitey != NULL) *whitey = info_ptr->cHRM.whitey; | |
| if (redx != NULL) *redx = info_ptr->cHRM.redx; | |
| if (redy != NULL) *redy = info_ptr->cHRM.redy; | |
| if (greenx != NULL) *greenx = info_ptr->cHRM.greenx; | |
| if (greeny != NULL) *greeny = info_ptr->cHRM.greeny; | |
| if (bluex != NULL) *bluex = info_ptr->cHRM.bluex; | |
| if (bluey != NULL) *bluey = info_ptr->cHRM.bluey; | |
| return PNG_INFO_cHRM; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| #endif | |
| #ifdef PNG_gAMA_SUPPORTED | |
| # ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_gAMA_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_fixed_point *file_gamma) | |
| { | |
| png_debug1(1, "in %s retrieval function", "gAMA"); | |
| /* PNGv3 compatibility: only report gAMA if it is really present. */ | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_gAMA) != 0) | |
| { | |
| if (file_gamma != NULL) *file_gamma = info_ptr->gamma; | |
| return PNG_INFO_gAMA; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_gAMA(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| double *file_gamma) | |
| { | |
| png_debug1(1, "in %s retrieval function", "gAMA(float)"); | |
| /* PNGv3 compatibility: only report gAMA if it is really present. */ | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_gAMA) != 0) | |
| { | |
| if (file_gamma != NULL) | |
| *file_gamma = png_float(png_ptr, info_ptr->gamma, "gAMA"); | |
| return PNG_INFO_gAMA; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| #endif | |
| #ifdef PNG_sRGB_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_sRGB(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| int *file_srgb_intent) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sRGB"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_sRGB) != 0) | |
| { | |
| if (file_srgb_intent != NULL) | |
| *file_srgb_intent = info_ptr->rendering_intent; | |
| return PNG_INFO_sRGB; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_iCCP_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_charpp name, int *compression_type, | |
| png_bytepp profile, png_uint_32 *proflen) | |
| { | |
| png_debug1(1, "in %s retrieval function", "iCCP"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_iCCP) != 0 && | |
| name != NULL && profile != NULL && proflen != NULL) | |
| { | |
| *name = info_ptr->iccp_name; | |
| *profile = info_ptr->iccp_profile; | |
| *proflen = png_get_uint_32(info_ptr->iccp_profile); | |
| /* This is somewhat irrelevant since the profile data returned has | |
| * actually been uncompressed. | |
| */ | |
| if (compression_type != NULL) | |
| *compression_type = PNG_COMPRESSION_TYPE_BASE; | |
| return PNG_INFO_iCCP; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_sPLT_SUPPORTED | |
| int PNGAPI | |
| png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_sPLT_tpp spalettes) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sPLT"); | |
| if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) | |
| { | |
| *spalettes = info_ptr->splt_palettes; | |
| return info_ptr->splt_palettes_num; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_cICP_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_cICP(png_const_structrp png_ptr, | |
| png_const_inforp info_ptr, png_bytep colour_primaries, | |
| png_bytep transfer_function, png_bytep matrix_coefficients, | |
| png_bytep video_full_range_flag) | |
| { | |
| png_debug1(1, "in %s retrieval function", "cICP"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cICP) != 0 && | |
| colour_primaries != NULL && transfer_function != NULL && | |
| matrix_coefficients != NULL && video_full_range_flag != NULL) | |
| { | |
| *colour_primaries = info_ptr->cicp_colour_primaries; | |
| *transfer_function = info_ptr->cicp_transfer_function; | |
| *matrix_coefficients = info_ptr->cicp_matrix_coefficients; | |
| *video_full_range_flag = info_ptr->cicp_video_full_range_flag; | |
| return (PNG_INFO_cICP); | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_cLLI_SUPPORTED | |
| # ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_cLLI_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32p maxCLL, | |
| png_uint_32p maxFALL) | |
| { | |
| png_debug1(1, "in %s retrieval function", "cLLI"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cLLI) != 0) | |
| { | |
| if (maxCLL != NULL) *maxCLL = info_ptr->maxCLL; | |
| if (maxFALL != NULL) *maxFALL = info_ptr->maxFALL; | |
| return PNG_INFO_cLLI; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_cLLI(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| double *maxCLL, double *maxFALL) | |
| { | |
| png_debug1(1, "in %s retrieval function", "cLLI(float)"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_cLLI) != 0) | |
| { | |
| if (maxCLL != NULL) *maxCLL = info_ptr->maxCLL * .0001; | |
| if (maxFALL != NULL) *maxFALL = info_ptr->maxFALL * .0001; | |
| return PNG_INFO_cLLI; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| #endif /* cLLI */ | |
| #ifdef PNG_mDCV_SUPPORTED | |
| # ifdef PNG_FIXED_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_mDCV_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_fixed_point *white_x, png_fixed_point *white_y, | |
| png_fixed_point *red_x, png_fixed_point *red_y, | |
| png_fixed_point *green_x, png_fixed_point *green_y, | |
| png_fixed_point *blue_x, png_fixed_point *blue_y, | |
| png_uint_32p mastering_maxDL, png_uint_32p mastering_minDL) | |
| { | |
| png_debug1(1, "in %s retrieval function", "mDCV"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_mDCV) != 0) | |
| { | |
| if (white_x != NULL) *white_x = info_ptr->mastering_white_x * 2; | |
| if (white_y != NULL) *white_y = info_ptr->mastering_white_y * 2; | |
| if (red_x != NULL) *red_x = info_ptr->mastering_red_x * 2; | |
| if (red_y != NULL) *red_y = info_ptr->mastering_red_y * 2; | |
| if (green_x != NULL) *green_x = info_ptr->mastering_green_x * 2; | |
| if (green_y != NULL) *green_y = info_ptr->mastering_green_y * 2; | |
| if (blue_x != NULL) *blue_x = info_ptr->mastering_blue_x * 2; | |
| if (blue_y != NULL) *blue_y = info_ptr->mastering_blue_y * 2; | |
| if (mastering_maxDL != NULL) *mastering_maxDL = info_ptr->mastering_maxDL; | |
| if (mastering_minDL != NULL) *mastering_minDL = info_ptr->mastering_minDL; | |
| return PNG_INFO_mDCV; | |
| } | |
| return 0; | |
| } | |
| # endif | |
| # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_mDCV(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| double *white_x, double *white_y, double *red_x, double *red_y, | |
| double *green_x, double *green_y, double *blue_x, double *blue_y, | |
| double *mastering_maxDL, double *mastering_minDL) | |
| { | |
| png_debug1(1, "in %s retrieval function", "mDCV(float)"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_mDCV) != 0) | |
| { | |
| if (white_x != NULL) *white_x = info_ptr->mastering_white_x * .00002; | |
| if (white_y != NULL) *white_y = info_ptr->mastering_white_y * .00002; | |
| if (red_x != NULL) *red_x = info_ptr->mastering_red_x * .00002; | |
| if (red_y != NULL) *red_y = info_ptr->mastering_red_y * .00002; | |
| if (green_x != NULL) *green_x = info_ptr->mastering_green_x * .00002; | |
| if (green_y != NULL) *green_y = info_ptr->mastering_green_y * .00002; | |
| if (blue_x != NULL) *blue_x = info_ptr->mastering_blue_x * .00002; | |
| if (blue_y != NULL) *blue_y = info_ptr->mastering_blue_y * .00002; | |
| if (mastering_maxDL != NULL) | |
| *mastering_maxDL = info_ptr->mastering_maxDL * .0001; | |
| if (mastering_minDL != NULL) | |
| *mastering_minDL = info_ptr->mastering_minDL * .0001; | |
| return PNG_INFO_mDCV; | |
| } | |
| return 0; | |
| } | |
| # endif /* FLOATING_POINT */ | |
| #endif /* mDCV */ | |
| #ifdef PNG_eXIf_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_eXIf(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_bytep *exif) | |
| { | |
| png_warning(png_ptr, "png_get_eXIf does not work; use png_get_eXIf_1"); | |
| PNG_UNUSED(info_ptr) | |
| PNG_UNUSED(exif) | |
| return 0; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_eXIf_1(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32 *num_exif, png_bytep *exif) | |
| { | |
| png_debug1(1, "in %s retrieval function", "eXIf"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_eXIf) != 0 && exif != NULL) | |
| { | |
| *num_exif = info_ptr->num_exif; | |
| *exif = info_ptr->exif; | |
| return PNG_INFO_eXIf; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_hIST_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_uint_16p *hist) | |
| { | |
| png_debug1(1, "in %s retrieval function", "hIST"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_hIST) != 0 && hist != NULL) | |
| { | |
| *hist = info_ptr->hist; | |
| return PNG_INFO_hIST; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| png_uint_32 PNGAPI | |
| png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32 *width, png_uint_32 *height, int *bit_depth, | |
| int *color_type, int *interlace_type, int *compression_type, | |
| int *filter_type) | |
| { | |
| png_debug1(1, "in %s retrieval function", "IHDR"); | |
| if (png_ptr == NULL || info_ptr == NULL) | |
| return 0; | |
| if (width != NULL) | |
| *width = info_ptr->width; | |
| if (height != NULL) | |
| *height = info_ptr->height; | |
| if (bit_depth != NULL) | |
| *bit_depth = info_ptr->bit_depth; | |
| if (color_type != NULL) | |
| *color_type = info_ptr->color_type; | |
| if (compression_type != NULL) | |
| *compression_type = info_ptr->compression_type; | |
| if (filter_type != NULL) | |
| *filter_type = info_ptr->filter_type; | |
| if (interlace_type != NULL) | |
| *interlace_type = info_ptr->interlace_type; | |
| /* This is redundant if we can be sure that the info_ptr values were all | |
| * assigned in png_set_IHDR(). We do the check anyhow in case an | |
| * application has ignored our advice not to mess with the members | |
| * of info_ptr directly. | |
| */ | |
| png_check_IHDR(png_ptr, info_ptr->width, info_ptr->height, | |
| info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, | |
| info_ptr->compression_type, info_ptr->filter_type); | |
| return 1; | |
| } | |
| #ifdef PNG_oFFs_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_oFFs(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) | |
| { | |
| png_debug1(1, "in %s retrieval function", "oFFs"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_oFFs) != 0 && | |
| offset_x != NULL && offset_y != NULL && unit_type != NULL) | |
| { | |
| *offset_x = info_ptr->x_offset; | |
| *offset_y = info_ptr->y_offset; | |
| *unit_type = (int)info_ptr->offset_unit_type; | |
| return PNG_INFO_oFFs; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_pCAL_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, | |
| png_charp *units, png_charpp *params) | |
| { | |
| png_debug1(1, "in %s retrieval function", "pCAL"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pCAL) != 0 && | |
| purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && | |
| nparams != NULL && units != NULL && params != NULL) | |
| { | |
| *purpose = info_ptr->pcal_purpose; | |
| *X0 = info_ptr->pcal_X0; | |
| *X1 = info_ptr->pcal_X1; | |
| *type = (int)info_ptr->pcal_type; | |
| *nparams = (int)info_ptr->pcal_nparams; | |
| *units = info_ptr->pcal_units; | |
| *params = info_ptr->pcal_params; | |
| return PNG_INFO_pCAL; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_sCAL_SUPPORTED | |
| # ifdef PNG_FIXED_POINT_SUPPORTED | |
| # if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ | |
| defined(PNG_FLOATING_POINT_SUPPORTED) | |
| png_uint_32 PNGAPI | |
| png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| int *unit, png_fixed_point *width, png_fixed_point *height) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sCAL"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_sCAL) != 0) | |
| { | |
| *unit = info_ptr->scal_unit; | |
| /*TODO: make this work without FP support; the API is currently eliminated | |
| * if neither floating point APIs nor internal floating point arithmetic | |
| * are enabled. | |
| */ | |
| *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width"); | |
| *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height), | |
| "sCAL height"); | |
| return PNG_INFO_sCAL; | |
| } | |
| return 0; | |
| } | |
| # endif /* FLOATING_ARITHMETIC */ | |
| # endif /* FIXED_POINT */ | |
| # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_sCAL(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| int *unit, double *width, double *height) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sCAL(float)"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_sCAL) != 0) | |
| { | |
| *unit = info_ptr->scal_unit; | |
| *width = atof(info_ptr->scal_s_width); | |
| *height = atof(info_ptr->scal_s_height); | |
| return PNG_INFO_sCAL; | |
| } | |
| return 0; | |
| } | |
| # endif /* FLOATING POINT */ | |
| png_uint_32 PNGAPI | |
| png_get_sCAL_s(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| int *unit, png_charpp width, png_charpp height) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sCAL(str)"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_sCAL) != 0) | |
| { | |
| *unit = info_ptr->scal_unit; | |
| *width = info_ptr->scal_s_width; | |
| *height = info_ptr->scal_s_height; | |
| return PNG_INFO_sCAL; | |
| } | |
| return 0; | |
| } | |
| #endif /* sCAL */ | |
| #ifdef PNG_pHYs_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_pHYs(png_const_structrp png_ptr, png_const_inforp info_ptr, | |
| png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) | |
| { | |
| png_uint_32 retval = 0; | |
| png_debug1(1, "in %s retrieval function", "pHYs"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_pHYs) != 0) | |
| { | |
| if (res_x != NULL) | |
| { | |
| *res_x = info_ptr->x_pixels_per_unit; | |
| retval |= PNG_INFO_pHYs; | |
| } | |
| if (res_y != NULL) | |
| { | |
| *res_y = info_ptr->y_pixels_per_unit; | |
| retval |= PNG_INFO_pHYs; | |
| } | |
| if (unit_type != NULL) | |
| { | |
| *unit_type = (int)info_ptr->phys_unit_type; | |
| retval |= PNG_INFO_pHYs; | |
| } | |
| } | |
| return retval; | |
| } | |
| #endif /* pHYs */ | |
| png_uint_32 PNGAPI | |
| png_get_PLTE(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_colorp *palette, int *num_palette) | |
| { | |
| png_debug1(1, "in %s retrieval function", "PLTE"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_PLTE) != 0 && palette != NULL) | |
| { | |
| *palette = info_ptr->palette; | |
| *num_palette = info_ptr->num_palette; | |
| png_debug1(3, "num_palette = %d", *num_palette); | |
| return PNG_INFO_PLTE; | |
| } | |
| return 0; | |
| } | |
| #ifdef PNG_sBIT_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_color_8p *sig_bit) | |
| { | |
| png_debug1(1, "in %s retrieval function", "sBIT"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_sBIT) != 0 && sig_bit != NULL) | |
| { | |
| *sig_bit = &(info_ptr->sig_bit); | |
| return PNG_INFO_sBIT; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_TEXT_SUPPORTED | |
| int PNGAPI | |
| png_get_text(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_textp *text_ptr, int *num_text) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) | |
| { | |
| png_debug1(1, "in text retrieval function, chunk typeid = 0x%lx", | |
| (unsigned long)png_ptr->chunk_name); | |
| if (text_ptr != NULL) | |
| *text_ptr = info_ptr->text; | |
| if (num_text != NULL) | |
| *num_text = info_ptr->num_text; | |
| return info_ptr->num_text; | |
| } | |
| if (num_text != NULL) | |
| *num_text = 0; | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_tIME_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_tIME(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_timep *mod_time) | |
| { | |
| png_debug1(1, "in %s retrieval function", "tIME"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_tIME) != 0 && mod_time != NULL) | |
| { | |
| *mod_time = &(info_ptr->mod_time); | |
| return PNG_INFO_tIME; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_tRNS_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) | |
| { | |
| png_uint_32 retval = 0; | |
| png_debug1(1, "in %s retrieval function", "tRNS"); | |
| if (png_ptr != NULL && info_ptr != NULL && | |
| (info_ptr->valid & PNG_INFO_tRNS) != 0) | |
| { | |
| if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) | |
| { | |
| if (trans_alpha != NULL) | |
| { | |
| *trans_alpha = info_ptr->trans_alpha; | |
| retval |= PNG_INFO_tRNS; | |
| } | |
| if (trans_color != NULL) | |
| *trans_color = &(info_ptr->trans_color); | |
| } | |
| else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ | |
| { | |
| if (trans_color != NULL) | |
| { | |
| *trans_color = &(info_ptr->trans_color); | |
| retval |= PNG_INFO_tRNS; | |
| } | |
| if (trans_alpha != NULL) | |
| *trans_alpha = NULL; | |
| } | |
| if (num_trans != NULL) | |
| { | |
| *num_trans = info_ptr->num_trans; | |
| retval |= PNG_INFO_tRNS; | |
| } | |
| } | |
| return retval; | |
| } | |
| #endif | |
| #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED | |
| int PNGAPI | |
| png_get_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr, | |
| png_unknown_chunkpp unknowns) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) | |
| { | |
| *unknowns = info_ptr->unknown_chunks; | |
| return info_ptr->unknown_chunks_num; | |
| } | |
| return 0; | |
| } | |
| #endif | |
| #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED | |
| png_byte PNGAPI | |
| png_get_rgb_to_gray_status(png_const_structrp png_ptr) | |
| { | |
| return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0); | |
| } | |
| #endif | |
| #ifdef PNG_USER_CHUNKS_SUPPORTED | |
| png_voidp PNGAPI | |
| png_get_user_chunk_ptr(png_const_structrp png_ptr) | |
| { | |
| return (png_ptr ? png_ptr->user_chunk_ptr : NULL); | |
| } | |
| #endif | |
| size_t PNGAPI | |
| png_get_compression_buffer_size(png_const_structrp png_ptr) | |
| { | |
| if (png_ptr == NULL) | |
| return 0; | |
| #ifdef PNG_WRITE_SUPPORTED | |
| if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) | |
| #endif | |
| { | |
| #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | |
| return png_ptr->IDAT_read_size; | |
| #else | |
| return PNG_IDAT_READ_SIZE; | |
| #endif | |
| } | |
| #ifdef PNG_WRITE_SUPPORTED | |
| else | |
| return png_ptr->zbuffer_size; | |
| #endif | |
| } | |
| #ifdef PNG_SET_USER_LIMITS_SUPPORTED | |
| /* These functions were added to libpng 1.2.6 and were enabled | |
| * by default in libpng-1.4.0 */ | |
| png_uint_32 PNGAPI | |
| png_get_user_width_max(png_const_structrp png_ptr) | |
| { | |
| return (png_ptr ? png_ptr->user_width_max : 0); | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_user_height_max(png_const_structrp png_ptr) | |
| { | |
| return (png_ptr ? png_ptr->user_height_max : 0); | |
| } | |
| /* This function was added to libpng 1.4.0 */ | |
| png_uint_32 PNGAPI | |
| png_get_chunk_cache_max(png_const_structrp png_ptr) | |
| { | |
| return (png_ptr ? png_ptr->user_chunk_cache_max : 0); | |
| } | |
| /* This function was added to libpng 1.4.1 */ | |
| png_alloc_size_t PNGAPI | |
| png_get_chunk_malloc_max(png_const_structrp png_ptr) | |
| { | |
| return (png_ptr ? png_ptr->user_chunk_malloc_max : 0); | |
| } | |
| #endif /* SET_USER_LIMITS */ | |
| /* These functions were added to libpng 1.4.0 */ | |
| #ifdef PNG_IO_STATE_SUPPORTED | |
| png_uint_32 PNGAPI | |
| png_get_io_state(png_const_structrp png_ptr) | |
| { | |
| return png_ptr->io_state; | |
| } | |
| png_uint_32 PNGAPI | |
| png_get_io_chunk_type(png_const_structrp png_ptr) | |
| { | |
| return png_ptr->chunk_name; | |
| } | |
| #endif /* IO_STATE */ | |
| #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED | |
| # ifdef PNG_GET_PALETTE_MAX_SUPPORTED | |
| int PNGAPI | |
| png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr) | |
| { | |
| if (png_ptr != NULL && info_ptr != NULL) | |
| return png_ptr->num_palette_max; | |
| return -1; | |
| } | |
| # endif | |
| #endif | |
| #endif /* READ || WRITE */ |