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Imported from libpng-1.0.7beta15.tar

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This commit is contained in:
Glenn Randers-Pehrson
2000-05-29 08:58:03 -05:00
parent fc4a143ec6
commit 104622bebb
49 changed files with 1368 additions and 267 deletions
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76
pngget.c
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@@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* libpng 1.0.7beta14 - May 17, 2000
* libpng 1.0.7beta15 - May 29, 2000
* 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
@@ -115,15 +115,17 @@ png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
png_uint_32 PNGAPI
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
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)
return (0);
else return (info_ptr->x_pixels_per_unit);
}
else
#else
return (0);
#endif
return (0);
}
@@ -131,15 +133,17 @@ png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
png_uint_32 PNGAPI
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
png_debug1(1, "in %s retrieval function\n", "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
#else
return (0);
#endif
return (0);
}
@@ -147,8 +151,9 @@ png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
png_uint_32 PNGAPI
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
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 ||
@@ -156,7 +161,8 @@ png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
return (0);
else return (info_ptr->x_pixels_per_unit);
}
else
#else
return (0);
#endif
return (0);
}
@@ -165,82 +171,92 @@ png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
float PNGAPI
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "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 PNGAPI
png_int_32 PNGAPI
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
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)
return (0);
else return (info_ptr->x_offset);
}
else
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_int_32 PNGAPI
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
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)
return (0);
else return (info_ptr->y_offset);
}
else
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_int_32 PNGAPI
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
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)
return (0);
else return (info_ptr->x_offset);
}
else
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_int_32 PNGAPI
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
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)
return (0);
else return (info_ptr->y_offset);
}
else
#else
return (0);
#endif
return (0);
}
@@ -250,21 +266,21 @@ 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)
*.0254 +.5);
*.0254 +.5));
}
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)
*.0254 +.5);
*.0254 +.5));
}
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)
*.0254 +.5);
*.0254 +.5));
}
float PNGAPI
@@ -278,7 +294,7 @@ 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)
*.00003937)
*.00003937);
}
#if defined(PNG_READ_pHYs_SUPPORTED)
@@ -305,7 +321,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
{
*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 * .0254 + .50);
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);