From 303be4553ad5bbe79d50a8708cf1f8f0e4d220af Mon Sep 17 00:00:00 2001
From: Darrell Anderson <humanreadable@yahoo.com>
Date: Thu, 12 Apr 2012 21:58:28 -0500
Subject: Fix building with libpng 1.5.

---
 src/gvcore/pngformattype.cpp | 59 ++++++++++++++++++++++++++++++--------------
 1 file changed, 40 insertions(+), 19 deletions(-)

(limited to 'src')

diff --git a/src/gvcore/pngformattype.cpp b/src/gvcore/pngformattype.cpp
index 77bf7b3..8da8089 100644
--- a/src/gvcore/pngformattype.cpp
+++ b/src/gvcore/pngformattype.cpp
@@ -211,7 +211,7 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 
     if ( color_type == PNG_COLOR_TYPE_GRAY ) {
 	// Black & White or 8-bit grayscale
-	if ( bit_depth == 1 && info_ptr->channels == 1 ) {
+      if ( bit_depth == 1 && png_get_channels(png_ptr, info_ptr) == 1 ) {
 	    png_set_invert_mono( png_ptr );
 	    png_read_update_info( png_ptr, info_ptr );
 	    if (!image.create( width, height, 1, 2, TQImage::BigEndian ))
@@ -246,7 +246,11 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 	    }
 	    if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ) {
 #if PNG_LIBPNG_VER_MAJOR>1 || ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR>=4 )
-		const int g = info_ptr->trans_color.gray;
+		png_bytep trans_alpha;
+		int num_trans;
+		png_color_16p trans_color;
+		png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, &trans_color);
+		const int g = trans_color->gray;
 #else
  		const int g = info_ptr->trans_values.gray;
 #endif
@@ -256,9 +260,13 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 		}
 	    }
 	}
-    } else if ( color_type == PNG_COLOR_TYPE_PALETTE
+    } else {
+     png_colorp palette;
+     int num_palette;
+     png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
+     if ( color_type == PNG_COLOR_TYPE_PALETTE
      && png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)
-     && info_ptr->num_palette <= 256 )
+     && num_palette <= 256 )
     {
 	// 1-bit and 8-bit color
 	if ( bit_depth != 1 )
@@ -266,20 +274,28 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 	png_read_update_info( png_ptr, info_ptr );
 	png_get_IHDR(png_ptr, info_ptr,
 	    &width, &height, &bit_depth, &color_type, 0, 0, 0);
-	if (!image.create(width, height, bit_depth, info_ptr->num_palette,
+	if (!image.create(width, height, bit_depth, num_palette,
 	    TQImage::BigEndian))
 	    return;
 	int i = 0;
 	if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ) {
+	    png_bytep trans_alpha;
+	    int num_trans;
+	    png_color_16p trans_color;
+	    png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, &trans_color);
 	    image.setAlphaBuffer( TRUE );
-	    while ( i < info_ptr->num_trans ) {
+	    while ( i < num_trans ) {
 		image.setColor(i, tqRgba(
-		    info_ptr->palette[i].red,
-		    info_ptr->palette[i].green,
-		    info_ptr->palette[i].blue,
-#if PNG_LIBPNG_VER_MAJOR>1 || ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR>=4 )
-		    info_ptr->trans_alpha[i]
-#else
+		    palette[i].red,
+		    palette[i].green,
+		    palette[i].blue,
+#if PNG_LIBPNG_VER_MAJOR>1 || ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR>=5 )
+		    trans_alpha[i]
+#endif
+#if ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR==4 )
+        info_ptr->trans_alpha[i]
+#endif
+#if ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR<=3 )
  		    info_ptr->trans[i]
 #endif
 		    )
@@ -287,11 +303,11 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 		i++;
 	    }
 	}
-	while ( i < info_ptr->num_palette ) {
+	while ( i < num_palette ) {
 	    image.setColor(i, tqRgba(
-		info_ptr->palette[i].red,
-		info_ptr->palette[i].green,
-		info_ptr->palette[i].blue,
+		palette[i].red,
+		palette[i].green,
+		palette[i].blue,
 		0xff
 		)
 	    );
@@ -326,12 +342,13 @@ void setup_qt( TQImage& image, png_structp png_ptr, png_infop info_ptr )
 	}
 
 	png_read_update_info(png_ptr, info_ptr);
-    }
+      }
 
     // TQt==ARGB==Big(ARGB)==Little(BGRA)
     if ( TQImage::systemByteOrder() == TQImage::LittleEndian ) {
 	png_set_bgr(png_ptr);
     }
+    }
 }
 
 
@@ -389,7 +406,7 @@ int PNGFormat::decode(TQImage& img, TQImageConsumer* cons,
 	    return -1;
 	}
 
-	if (setjmp((png_ptr)->jmpbuf)) {
+	if (setjmp(png_jmpbuf(png_ptr))) {
 	    png_destroy_read_struct(&png_ptr, &info_ptr, 0);
 	    image = 0;
 	    return -1;
@@ -417,7 +434,7 @@ int PNGFormat::decode(TQImage& img, TQImageConsumer* cons,
 
     if ( !png_ptr ) return 0;
 
-    if (setjmp(png_ptr->jmpbuf)) {
+    if (setjmp(png_jmpbuf(png_ptr))) {
 	png_destroy_read_struct(&png_ptr, &info_ptr, 0);
 	image = 0;
 	state = MovieStart;
@@ -484,7 +501,11 @@ void PNGFormat::end(png_structp png, png_infop info)
     consumer->frameDone(TQPoint(offx,offy),r);
     consumer->end();
     state = FrameStart;
+#if PNG_LIBPNG_VER_MAJOR>1 || ( PNG_LIBPNG_VER_MAJOR==1 && PNG_LIBPNG_VER_MINOR>=5 )
+    unused_data = png_process_data_pause(png, 1);
+#else
     unused_data = (int)png->buffer_size; // Since libpng doesn't tell us
+#endif
 }
 
 #ifdef PNG_USER_CHUNKS_SUPPORTED
-- 
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