On 04/28/2011 12:49 PM, PICCORO McKAY Lenz wrote:
> Hi Hello! everyone.
>
> in this fashion API changes these days, I found that debian and
> winbuntu old lasted revisions, has old libpng 1.2, especialy lenny
> with 1.2.22, which means that the patchs for libpng 1.4 support on qt3
> for trinity can make impossible compile into Debian squeeze, testing
> inlcusive, as win-buntu 9.XX, it should be modified to use a macro
> -LIB_PNG_14 or something similar .. I do not remember how to work with
> this but if I can do for the weekend..
>
> If some body can do that , please change the patch for use optionaly
> both library versions...
>
> If i can resolve all issues, i do a qt3 3.3.c tar gzipped release
> alternate for ready download in public, for easy acces to novice
> developers
>
I have libpng 1.4.5-1 installed and this patch for qt3 works for me

--- src/kernel/qpngio.cpp.orig    2010-01-16 22:02:41.000000000 +0100
+++ src/kernel/qpngio.cpp    2010-01-16 22:03:56.000000000 +0100
@@ -159,7 +159,7 @@
          image.setColor( i, qRgba(c,c,c,0xff) );
          }
          if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ) {
-        const int g = info_ptr->trans_values.gray;
+        const int g = info_ptr->trans_color.gray;
          if (g < ncols) {
              image.setAlphaBuffer(TRUE);
              image.setColor(g, image.color(g) & RGB_MASK);
@@ -187,7 +187,7 @@
              info_ptr->palette[i].red,
              info_ptr->palette[i].green,
              info_ptr->palette[i].blue,
-            info_ptr->trans[i]
+            info_ptr->trans_alpha[i]
              )
          );
          i++;
@@ -321,9 +321,9 @@
  png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)
      if (image.depth()==32 && png_get_valid(png_ptr, info_ptr, 
PNG_INFO_tRNS)) {
      QRgb trans = 0xFF000000 | qRgb(
-          (info_ptr->trans_values.red << 8 >> bit_depth)&0xff,
-          (info_ptr->trans_values.green << 8 >> bit_depth)&0xff,
-          (info_ptr->trans_values.blue << 8 >> bit_depth)&0xff);
+          (info_ptr->trans_color.red << 8 >> bit_depth)&0xff,
+          (info_ptr->trans_color.green << 8 >> bit_depth)&0xff,
+          (info_ptr->trans_color.blue << 8 >> bit_depth)&0xff);
      for (uint y=0; y<height; y++) {
          for (uint x=0; x<info_ptr->width; x++) {
          if (((uint**)jt)[y][x] == trans) {