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Fix compatibility warnings of libpng v1.4. Hopefully maintained compatibility with older versions... please report if problems.

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1504 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud 2010-06-14 23:01:57 +00:00
parent 0ab3678768
commit 85e4ea9a79
2 changed files with 31 additions and 12 deletions
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2
doc/COMPILING.txt
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@ -125,7 +125,7 @@ Zlib:
Libpng
Requires: Zlib
http://www.mirrorservice.org/sites/download.sourceforge.net/pub/sourceforge/l/li/libpng/
libpng-1.0.23.tar.gz
libpng-1.4.2.tar.gz (Before June 2010, we were using libpng-1.0.23.tar.gz)
Uncompress in temporary directory
./configure
make

35
src/fileformats.c
View File

@ -27,6 +27,19 @@
#ifndef __no_pnglib__
#include <png.h>
#if (PNG_LIBPNG_VER_MAJOR <= 1) && (PNG_LIBPNG_VER_MINOR < 4)
// Compatibility layer to allow us to use libng 1.4 or any older one.
// This function is renamed in 1.4
#define png_set_expand_gray_1_2_4_to_8(x) png_set_gray_1_2_4_to_8(x)
// Wrappers that are mandatory in 1.4. Older version allowed direct access.
#define png_get_rowbytes(png_ptr,info_ptr) ((info_ptr)->rowbytes)
#define png_get_image_width(png_ptr,info_ptr) ((info_ptr)->width)
#define png_get_image_height(png_ptr,info_ptr) ((info_ptr)->height)
#define png_get_bit_depth(png_ptr,info_ptr) ((info_ptr)->bit_depth)
#define png_get_color_type(png_ptr,info_ptr) ((info_ptr)->color_type)
#endif
#endif
#include <stdlib.h>
@ -3371,8 +3384,8 @@ void Load_PNG(T_IO_Context * context)
// Load file information
png_read_info(png_ptr, info_ptr);
color_type = info_ptr->color_type;
bit_depth = info_ptr->bit_depth;
color_type = png_get_color_type(png_ptr,info_ptr);
bit_depth = png_get_bit_depth(png_ptr,info_ptr);
// If it's any supported file
// (Note: As of writing this, this test covers every possible
@ -3425,9 +3438,9 @@ void Load_PNG(T_IO_Context * context)
}
}
if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA)
Pre_load(context,info_ptr->width,info_ptr->height,File_length_file(file),FORMAT_PNG,PIXEL_SIMPLE,1);
Pre_load(context,png_get_image_width(png_ptr,info_ptr),png_get_image_height(png_ptr,info_ptr),File_length_file(file),FORMAT_PNG,PIXEL_SIMPLE,1);
else
Pre_load(context, info_ptr->width,info_ptr->height,File_length_file(file),FORMAT_PNG,context->Ratio,0);
Pre_load(context,png_get_image_width(png_ptr,info_ptr),png_get_image_height(png_ptr,info_ptr),File_length_file(file),FORMAT_PNG,context->Ratio,0);
if (File_error==0)
{
@ -3535,8 +3548,8 @@ void Load_PNG(T_IO_Context * context)
}
}
context->Width=info_ptr->width;
context->Height=info_ptr->height;
context->Width=png_get_image_width(png_ptr,info_ptr);
context->Height=png_get_image_height(png_ptr,info_ptr);
png_set_interlace_handling(png_ptr);
png_read_update_info(png_ptr, info_ptr);
@ -3556,7 +3569,7 @@ void Load_PNG(T_IO_Context * context)
// 8bpp
for (y=0; y<context->Height; y++)
Row_pointers[y] = (png_byte*) malloc(info_ptr->rowbytes);
Row_pointers[y] = (png_byte*) malloc(png_get_rowbytes(png_ptr,info_ptr));
row_pointers_allocated = 1;
png_read_image(png_ptr, Row_pointers);
@ -3575,7 +3588,7 @@ void Load_PNG(T_IO_Context * context)
// It's a preview
// Unfortunately we need to allocate loads of memory
for (y=0; y<context->Height; y++)
Row_pointers[y] = (png_byte*) malloc(info_ptr->rowbytes);
Row_pointers[y] = (png_byte*) malloc(png_get_rowbytes(png_ptr,info_ptr));
row_pointers_allocated = 1;
png_read_image(png_ptr, Row_pointers);
@ -3674,9 +3687,15 @@ void Save_PNG(T_IO_Context * context)
{
// Commentaires texte PNG
// Cette partie est optionnelle
#ifdef PNG_iTXt_SUPPORTED
png_text text_ptr[2] = {
{-1, "Software", "Grafx2", 6, 0, NULL, NULL},
{-1, "Title", NULL, 0, 0, NULL, NULL}
#else
png_text text_ptr[2] = {
{-1, "Software", "Grafx2", 6},
{-1, "Title", NULL, 0}
#endif
};
int nb_text_chunks=1;
if (context->Comment[0])