/* pngget.c - retrieval of values from info struct
*
- * libpng 1.0.3 - January 14, 1999
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Copyright (c) 1998, 1999 Glenn Randers-Pehrson
+ * Last changed in libpng 1.4.2 [May 6, 2010]
+ * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 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
+ *
*/
-#define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
#include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+#include "pngpriv.h"
-png_uint_32
+png_uint_32 PNGAPI
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
+
else
return(0);
}
-png_uint_32
+png_size_t PNGAPI
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
+
else
return(0);
}
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+png_bytepp PNGAPI
+png_get_rows(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->row_pointers);
+
+ else
+ return(0);
+}
+#endif
+
#ifdef PNG_EASY_ACCESS_SUPPORTED
-/* easy access to info, added in libpng-0.99 */
-png_uint_32
+/* Easy access to info, added in libpng-0.99 */
+png_uint_32 PNGAPI
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->width;
- }
+
return (0);
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->height;
- }
+
return (0);
}
-png_byte
+png_byte PNGAPI
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->bit_depth;
- }
+
return (0);
}
-png_byte
+png_byte PNGAPI
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->color_type;
- }
+
return (0);
}
-png_byte
+png_byte PNGAPI
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->filter_type;
- }
+
return (0);
}
-png_byte
+png_byte PNGAPI
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->interlace_type;
- }
+
return (0);
}
-png_byte
+png_byte PNGAPI
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->compression_type;
- }
+
return (0);
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ if (png_ptr != NULL && info_ptr != NULL)
+#ifdef PNG_pHYs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_pHYs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
- if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+ png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
- else return (info_ptr->x_pixels_per_unit);
+
+ else
+ return (info_ptr->x_pixels_per_unit);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ if (png_ptr != NULL && info_ptr != NULL)
+#ifdef PNG_pHYs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_pHYs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
- if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+ png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
- else return (info_ptr->y_pixels_per_unit);
+
+ else
+ return (info_ptr->y_pixels_per_unit);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ if (png_ptr != NULL && info_ptr != NULL)
+#ifdef PNG_pHYs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_pHYs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
- if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
+ png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
return (0);
- else return (info_ptr->x_pixels_per_unit);
+
+ else
+ return (info_ptr->x_pixels_per_unit);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-float
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+float PNGAPI
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ if (png_ptr != NULL && info_ptr != NULL)
+#ifdef PNG_pHYs_SUPPORTED
+
+ if (info_ptr->valid & PNG_INFO_pHYs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
+ png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
+
if (info_ptr->x_pixels_per_unit == 0)
return ((float)0.0);
+
else
- return ((float)info_ptr->y_pixels_per_unit
- /(float)info_ptr->x_pixels_per_unit);
+ return ((float)((float)info_ptr->y_pixels_per_unit
+ /(float)info_ptr->x_pixels_per_unit));
}
- else
+#else
+ return (0.0);
#endif
- return ((float)0.0);
+ return ((float)0.0);
}
+#endif
-png_uint_32
+png_int_32 PNGAPI
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ if (png_ptr != NULL && info_ptr != NULL)
+#ifdef PNG_oFFs_SUPPORTED
+
+ if (info_ptr->valid & PNG_INFO_oFFs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
- if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+ png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+
+ if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
- else return (info_ptr->x_offset);
+
+ else
+ return (info_ptr->x_offset);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-png_uint_32
+png_int_32 PNGAPI
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ if (png_ptr != NULL && info_ptr != NULL)
+
+#ifdef PNG_oFFs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_oFFs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
- if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+ png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+
+ if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
- else return (info_ptr->y_offset);
+
+ else
+ return (info_ptr->y_offset);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-png_uint_32
+png_int_32 PNGAPI
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ if (png_ptr != NULL && info_ptr != NULL)
+
+#ifdef PNG_oFFs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_oFFs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
- if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+ png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+
+ if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
- else return (info_ptr->x_offset);
+
+ else
+ return (info_ptr->x_offset);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-png_uint_32
+png_int_32 PNGAPI
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ if (png_ptr != NULL && info_ptr != NULL)
+
+#ifdef PNG_oFFs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_oFFs)
{
- png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
- if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+ png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+
+ if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
- else return (info_ptr->y_offset);
+
+ else
+ return (info_ptr->y_offset);
}
- else
+#else
+ return (0);
#endif
return (0);
}
-#ifdef PNG_INCH_CONVERSIONS
-png_uint_32
+#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
+png_uint_32 PNGAPI
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
- *.03937 +.5)
+ *.0254 +.5));
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
- *.03937 +.5)
+ *.0254 +.5));
}
-png_uint_32
+png_uint_32 PNGAPI
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
- *.03937 +.5)
+ *.0254 +.5));
}
-float
+float PNGAPI
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
- *.03937/1000000. +.5)
+ *.00003937);
}
-float
+float PNGAPI
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
- *.03937/1000000. +.5)
+ *.00003937);
}
-#if defined(PNG_READ_pHYs_SUPPORTED)
-png_uint_32
+#ifdef PNG_pHYs_SUPPORTED
+png_uint_32 PNGAPI
png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
- png_debug1(1, "in %s retrieval function\n", "pHYs");
+ png_debug1(1, "in %s retrieval function", "pHYs");
+
if (res_x != NULL)
{
*res_x = info_ptr->x_pixels_per_unit;
{
*unit_type = (int)info_ptr->phys_unit_type;
retval |= PNG_INFO_pHYs;
- if(unit_type == 1)
+ if (*unit_type == 1)
{
- if (res_x != NULL) *res_x = (png_uint_32)(*res_x * 39.37 + .50);
- if (res_y != NULL) *res_y = (png_uint_32)(*res_y * 39.37 + .50);
+ 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 /* PNG_READ_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS */
+#endif /* PNG_pHYs_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
/* png_get_channels really belongs in here, too, but it's been around longer */
#endif /* PNG_EASY_ACCESS_SUPPORTED */
-png_byte
+png_byte PNGAPI
png_get_channels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return (0);
}
-png_bytep
+png_bytep PNGAPI
png_get_signature(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return (NULL);
}
-#if defined(PNG_READ_bKGD_SUPPORTED)
-png_uint_32
+#ifdef PNG_bKGD_SUPPORTED
+png_uint_32 PNGAPI
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
png_color_16p *background)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
&& background != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "bKGD");
+ png_debug1(1, "in %s retrieval function", "bKGD");
+
*background = &(info_ptr->background);
return (PNG_INFO_bKGD);
}
}
#endif
-#if defined(PNG_READ_cHRM_SUPPORTED)
-png_uint_32
+#ifdef PNG_cHRM_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
png_get_cHRM(png_structp png_ptr, png_infop 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)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
- png_debug1(1, "in %s retrieval function\n", "cHRM");
+ png_debug1(1, "in %s retrieval function", "cHRM");
+
if (white_x != NULL)
*white_x = (double)info_ptr->x_white;
if (white_y != NULL)
return (0);
}
#endif
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_cHRM_fixed(png_structp png_ptr, png_infop 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_debug1(1, "in %s retrieval function", "cHRM");
-#if defined(PNG_READ_gAMA_SUPPORTED)
-png_uint_32
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
+ {
+ if (white_x != NULL)
+ *white_x = info_ptr->int_x_white;
+ if (white_y != NULL)
+ *white_y = info_ptr->int_y_white;
+ if (red_x != NULL)
+ *red_x = info_ptr->int_x_red;
+ if (red_y != NULL)
+ *red_y = info_ptr->int_y_red;
+ if (green_x != NULL)
+ *green_x = info_ptr->int_x_green;
+ if (green_y != NULL)
+ *green_y = info_ptr->int_y_green;
+ if (blue_x != NULL)
+ *blue_x = info_ptr->int_x_blue;
+ if (blue_y != NULL)
+ *blue_y = info_ptr->int_y_blue;
+ return (PNG_INFO_cHRM);
+ }
+ return (0);
+}
+#endif
+#endif
+
+#ifdef PNG_gAMA_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
{
+ png_debug1(1, "in %s retrieval function", "gAMA");
+
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
&& file_gamma != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "gAMA");
*file_gamma = (double)info_ptr->gamma;
return (PNG_INFO_gAMA);
}
return (0);
}
#endif
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
+ png_fixed_point *int_file_gamma)
+{
+ png_debug1(1, "in %s retrieval function", "gAMA");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
+ && int_file_gamma != NULL)
+ {
+ *int_file_gamma = info_ptr->int_gamma;
+ return (PNG_INFO_gAMA);
+ }
+ return (0);
+}
+#endif
+#endif
-#if defined(PNG_READ_sRGB_SUPPORTED)
-png_uint_32
+#ifdef PNG_sRGB_SUPPORTED
+png_uint_32 PNGAPI
png_get_sRGB(png_structp png_ptr, png_infop 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)
&& file_srgb_intent != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "sRGB");
*file_srgb_intent = (int)info_ptr->srgb_intent;
return (PNG_INFO_sRGB);
}
}
#endif
-#if defined(PNG_READ_hIST_SUPPORTED)
-png_uint_32
+#ifdef PNG_iCCP_SUPPORTED
+png_uint_32 PNGAPI
+png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
+ png_charpp name, int *compression_type,
+ png_charpp 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)
+ && name != NULL && profile != NULL && proflen != NULL)
+ {
+ *name = info_ptr->iccp_name;
+ *profile = info_ptr->iccp_profile;
+ /* Compression_type is a dummy so the API won't have to change
+ * if we introduce multiple compression types later.
+ */
+ *proflen = (int)info_ptr->iccp_proflen;
+ *compression_type = (int)info_ptr->iccp_compression;
+ return (PNG_INFO_iCCP);
+ }
+ return (0);
+}
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
+ png_sPLT_tpp spalettes)
+{
+ if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
+ {
+ *spalettes = info_ptr->splt_palettes;
+ return ((png_uint_32)info_ptr->splt_palettes_num);
+ }
+ return (0);
+}
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+png_uint_32 PNGAPI
png_get_hIST(png_structp png_ptr, png_infop 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)
&& hist != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "hIST");
*hist = info_ptr->hist;
return (PNG_INFO_hIST);
}
}
#endif
-png_uint_32
+png_uint_32 PNGAPI
png_get_IHDR(png_structp png_ptr, png_infop 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)
{
- if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
- bit_depth != NULL && color_type != NULL)
- {
- int pixel_depth, channels;
- png_uint_32 rowbytes_per_pixel;
-
- png_debug1(1, "in %s retrieval function\n", "IHDR");
- *width = info_ptr->width;
- *height = info_ptr->height;
- *bit_depth = info_ptr->bit_depth;
- *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;
-
- /* check for potential overflow of rowbytes */
- if (*color_type == PNG_COLOR_TYPE_PALETTE)
- channels = 1;
- else if (*color_type & PNG_COLOR_MASK_COLOR)
- channels = 3;
- else
- channels = 1;
- if (*color_type & PNG_COLOR_MASK_ALPHA)
- channels++;
- pixel_depth = *bit_depth * channels;
- rowbytes_per_pixel = (pixel_depth + 7) >> 3;
- if ((*width > (png_uint_32)2147483647L/rowbytes_per_pixel))
- {
- png_warning(png_ptr,
- "Width too large for libpng to process image data.");
- }
- return (1);
- }
- return (0);
+ png_debug1(1, "in %s retrieval function", "IHDR");
+
+ if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
+ height == NULL || bit_depth == NULL || color_type == NULL)
+ return (0);
+
+ *width = info_ptr->width;
+ *height = info_ptr->height;
+ *bit_depth = info_ptr->bit_depth;
+ *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);
}
-#if defined(PNG_READ_oFFs_SUPPORTED)
-png_uint_32
+#ifdef PNG_oFFs_SUPPORTED
+png_uint_32 PNGAPI
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *offset_x, png_uint_32 *offset_y, int *unit_type)
+ 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)
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "oFFs");
*offset_x = info_ptr->x_offset;
*offset_y = info_ptr->y_offset;
*unit_type = (int)info_ptr->offset_unit_type;
}
#endif
-#if defined(PNG_READ_pCAL_SUPPORTED)
-png_uint_32
+#ifdef PNG_pCAL_SUPPORTED
+png_uint_32 PNGAPI
png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
png_charp *units, png_charpp *params)
{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL &&
- purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
- nparams != NULL && units != NULL && params != NULL)
+ png_debug1(1, "in %s retrieval function", "pCAL");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
+ && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
+ nparams != NULL && units != NULL && params != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "pCAL");
*purpose = info_ptr->pcal_purpose;
*X0 = info_ptr->pcal_X0;
*X1 = info_ptr->pcal_X1;
}
#endif
-#if defined(PNG_READ_pHYs_SUPPORTED)
-png_uint_32
+#ifdef PNG_sCAL_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
+ int *unit, double *width, double *height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = info_ptr->scal_pixel_width;
+ *height = info_ptr->scal_pixel_height;
+ return (PNG_INFO_sCAL);
+ }
+ return(0);
+}
+#else
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
+ int *unit, png_charpp width, png_charpp height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = info_ptr->scal_s_width;
+ *height = info_ptr->scal_s_height;
+ return (PNG_INFO_sCAL);
+ }
+ return(0);
+}
+#endif
+#endif
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+png_uint_32 PNGAPI
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
+ png_debug1(1, "in %s retrieval function", "pHYs");
+
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_pHYs))
{
- png_debug1(1, "in %s retrieval function\n", "pHYs");
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;
}
#endif
-png_uint_32
+png_uint_32 PNGAPI
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
int *num_palette)
{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_PLTE &&
- palette != NULL)
+ png_debug1(1, "in %s retrieval function", "PLTE");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
+ && palette != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "PLTE");
*palette = info_ptr->palette;
*num_palette = info_ptr->num_palette;
- png_debug1(3, "num_palette = %d\n", *num_palette);
+ png_debug1(3, "num_palette = %d", *num_palette);
return (PNG_INFO_PLTE);
}
return (0);
}
-#if defined(PNG_READ_sBIT_SUPPORTED)
-png_uint_32
+#ifdef PNG_sBIT_SUPPORTED
+png_uint_32 PNGAPI
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT &&
- sig_bit != NULL)
+ png_debug1(1, "in %s retrieval function", "sBIT");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
+ && sig_bit != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "sBIT");
*sig_bit = &(info_ptr->sig_bit);
return (PNG_INFO_sBIT);
}
}
#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
-png_uint_32
+#ifdef PNG_TEXT_SUPPORTED
+png_uint_32 PNGAPI
png_get_text(png_structp png_ptr, png_infop 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 %s retrieval function\n",
+ png_debug1(1, "in %s retrieval function",
(png_ptr->chunk_name[0] == '\0' ? "text"
: (png_const_charp)png_ptr->chunk_name));
+
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
+
if (num_text != NULL)
*num_text = info_ptr->num_text;
+
return ((png_uint_32)info_ptr->num_text);
}
+ if (num_text != NULL)
+ *num_text = 0;
return(0);
}
#endif
-#if defined(PNG_READ_tIME_SUPPORTED)
-png_uint_32
+#ifdef PNG_tIME_SUPPORTED
+png_uint_32 PNGAPI
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME &&
- mod_time != NULL)
+ png_debug1(1, "in %s retrieval function", "tIME");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
+ && mod_time != NULL)
{
- png_debug1(1, "in %s retrieval function\n", "tIME");
*mod_time = &(info_ptr->mod_time);
return (PNG_INFO_tIME);
}
}
#endif
-#if defined(PNG_READ_tRNS_SUPPORTED)
-png_uint_32
+#ifdef PNG_tRNS_SUPPORTED
+png_uint_32 PNGAPI
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_bytep *trans, int *num_trans, png_color_16p *trans_values)
+ png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
{
png_uint_32 retval = 0;
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
{
- png_debug1(1, "in %s retrieval function\n", "tRNS");
+ png_debug1(1, "in %s retrieval function", "tRNS");
+
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
- if (trans != NULL)
+ if (trans_alpha != NULL)
{
- *trans = info_ptr->trans;
+ *trans_alpha = info_ptr->trans_alpha;
retval |= PNG_INFO_tRNS;
}
- if (trans_values != NULL)
- *trans_values = &(info_ptr->trans_values);
+
+ if (trans_color != NULL)
+ *trans_color = &(info_ptr->trans_color);
}
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
{
- if (trans_values != NULL)
+ if (trans_color != NULL)
{
- *trans_values = &(info_ptr->trans_values);
+ *trans_color = &(info_ptr->trans_color);
retval |= PNG_INFO_tRNS;
}
- if(trans != NULL)
- *trans = NULL;
+
+ if (trans_alpha != NULL)
+ *trans_alpha = NULL;
}
- if(num_trans != NULL)
+ if (num_trans != NULL)
{
*num_trans = info_ptr->num_trans;
retval |= PNG_INFO_tRNS;
}
#endif
-#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
-png_byte
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+png_uint_32 PNGAPI
+png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
+ png_unknown_chunkpp unknowns)
+{
+ if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
+ {
+ *unknowns = info_ptr->unknown_chunks;
+ return ((png_uint_32)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_structp png_ptr)
{
- return png_ptr->rgb_to_gray_status;
+ 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_structp png_ptr)
+{
+ return (png_ptr? png_ptr->user_chunk_ptr : NULL);
+}
+#endif
+
+png_size_t PNGAPI
+png_get_compression_buffer_size(png_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->zbuf_size : 0L);
+}
+
+
+#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_structp png_ptr)
+{
+ return (png_ptr? png_ptr->user_width_max : 0);
+}
+png_uint_32 PNGAPI
+png_get_user_height_max (png_structp 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_structp 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_structp png_ptr)
+{
+ return (png_ptr?
+ png_ptr->user_chunk_malloc_max : 0);
+}
+#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+
+/* These functions were added to libpng 1.4.0 */
+#ifdef PNG_IO_STATE_SUPPORTED
+png_uint_32 PNGAPI
+png_get_io_state (png_structp png_ptr)
+{
+ return png_ptr->io_state;
+}
+
+png_bytep PNGAPI
+png_get_io_chunk_name (png_structp png_ptr)
+{
+ return png_ptr->chunk_name;
+}
+#endif /* ?PNG_IO_STATE_SUPPORTED */
+
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
projects / wxWidgets.git / blobdiff