[master] Imported from libpng-1.6.11.tar

contrib/libtests/pngvalid.c

@@ -386,9 +386,9 @@ next_format(png_bytep colour_type, png_bytep bit_depth,
 
    /* Palette images are restricted to 8 bit depth */
    if (*bit_depth <= 8
-#     ifdef DO_16BIT
+#ifdef DO_16BIT
          || (*colour_type != 3 && *bit_depth <= 16)
-#     endif
+#endif
       )
       return 1;
 
@@ -3155,10 +3155,10 @@ init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette,
       for (; i<256; ++i)
          tRNS[i] = 24;
 
-#     ifdef PNG_WRITE_tRNS_SUPPORTED
+#  ifdef PNG_WRITE_tRNS_SUPPORTED
          if (j > 0)
             png_set_tRNS(pp, pi, tRNS, j, 0/*color*/);
-#     endif
+#  endif
    }
 }
 
@@ -6776,14 +6776,14 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this,
           *  conversion adds another +/-2 in the 16-bit case and
           *  +/-(1<<(15-PNG_MAX_GAMMA_8)) in the 8-bit case.
           */
-         that->pm->limit += pow(
-#           if PNG_MAX_GAMMA_8 < 14
-               (that->this.bit_depth == 16 ? 8. :
-                  6. + (1<<(15-PNG_MAX_GAMMA_8)))
-#           else
-               8.
-#           endif
-               /65535, data.gamma);
+         that->pm->limit +=
+#        if PNG_MAX_GAMMA_8 < 14
+               pow((that->this.bit_depth == 16 ?
+                  8. : 6. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma);
+#        else
+               pow((that->this.bit_depth == 16 ?
+                  8. : 8. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma);
+#        endif
       }
 
       else
@@ -6801,13 +6801,12 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this,
           * internal calculation errors, not the actual limit imposed by
           * pngvalid on the output errors.
           */
-         that->pm->limit += pow(
-#           if DIGITIZE
-               1.1
-#           else
-               1.
-#           endif
-               /255, data.gamma);
+         that->pm->limit +=
+#        if DIGITIZE
+             pow(1.1 /255, data.gamma);
+#        else
+             pow(1.0 /255, data.gamma);
+#        endif
       }
    }
 

contrib/tools/pngfix.c

@@ -79,7 +79,7 @@
 #  error "pngfix not supported in this libpng version"
 #endif
 
-#if PNG_ZLIB_VERNUM >= 0x1240
+#if ZLIB_VERNUM >= 0x1240
 
 /* Copied from pngpriv.h */
 #ifdef __cplusplus
@@ -4014,16 +4014,16 @@ main(int argc, const char **argv)
    return global_end(&global);
 }
 
-#else /* PNG_ZLIB_VERNUM < 0x1240 */
+#else /* ZLIB_VERNUM < 0x1240 */
 int
 main(void)
 {
    fprintf(stderr,
       "pngfix needs libpng with a zlib >=1.2.4 (not 0x%x)\n",
-      PNG_ZLIB_VERNUM);
+      ZLIB_VERNUM);
    return 77;
 }
-#endif /* PNG_ZLIB_VERNUM */
+#endif /* ZLIB_VERNUM */
 
 #else /* No read support */