X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fpng2swf.c;h=58ebd172fb804b3261871110828348e4eabdbce3;hb=9a0c8e1b682a8ce8856af78c4740f3bb1763f3f4;hp=c07e4c9a04fa8abce075531131ecae3b987b027a;hpb=aee9de2c6eb23628e54b6896f5b441d9b39317c1;p=swftools.git

diff --git a/src/png2swf.c b/src/png2swf.c
index c07e4c9..58ebd17 100644
--- a/src/png2swf.c
+++ b/src/png2swf.c
@@ -159,9 +159,19 @@ int png_read_header(FILE*fi, struct png_header*header)
 	    c = data[10];     // compression mode (0)
 	    f = data[11];     // filter mode (0)
 	    i = data[12];     // interlace mode (0)
+	
+	    if(VERBOSE(2)) printf("image mode:%d\n", b);
+	    if(VERBOSE(2)) printf("bpp: %d\n", a);
+	    if(VERBOSE(2)) printf("compression: %d\n", c);
+	    if(VERBOSE(2)) printf("filter: %d\n", f);
+	    if(VERBOSE(2)) printf("interlace: %d\n", i);
 
-	    if(b!=2 && b!=3 && b!=6) {
+	    if(b!=0 && b!=2 && b!=3 && b!=6) {
 		fprintf(stderr, "Image mode %d not supported!\n", b);
+		if(b == 4) {
+		    fprintf(stderr, "(This is a grayscale image with alpha channel-\n");
+		    fprintf(stderr, " try converting it into an RGB image with alpha channel)\n");
+		}
 		exit(1);
 	    }
 	    if(a!=8 && (b==2 || b==6)) {
@@ -454,7 +464,7 @@ TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
     if(!png_read_header(fi, &header))
 	return 0;
 
-    if(header.mode == 3) bypp = 1;
+    if(header.mode == 3 || header.mode == 0) bypp = 1;
     else
     if(header.mode == 2) bypp = 3;
     else
@@ -550,7 +560,7 @@ TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
 	    }
 	    if(header.mode==6)
 		applyfilter4(mode, src, old, dest, header.width);
-	    else
+	    else if(header.mode==2)
 		applyfilter3(mode, src, old, dest, header.width);
 	}
 
@@ -585,34 +595,44 @@ TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
 	    swf_SetLosslessBits(t, header.width, header.height, data2, BMF_32BIT);
 	}
 	free(data2);
-    }
-    else {
-	RGBA*rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
+    } else if(header.mode == 0 || header.mode == 3) {
+	RGBA*rgba;
 	int swf_width = BYTES_PER_SCANLINE(header.width);
 	U8*data2 = malloc(swf_width*header.height);
 	U8*tmpline = malloc(header.width);
 	int i,x,y;
 	int pos=0;
-	if(!palette) {
-	    fprintf(stderr, "Error: No palette found!\n");
-	    exit(1);
-	}
-	/* 24->32 bit conversion */
-	for(i=0;i<palettelen;i++) {
-	    rgba[i].r = palette[i*3+0];
-	    rgba[i].g = palette[i*3+1];
-	    rgba[i].b = palette[i*3+2];
-	    if(alphapalette && i<alphapalettelen) {
-		rgba[i].a = alphapalette[i];
-		if(alphapalette[i] == 0) {
-		    /* if the color is fully transparent, it doesn't matter
-		       what it's rgb values are. furthermore, all Flash 
-		       players up to Flash 5 can't deal with anything beyond
-		       one transparent color with value (00,00,00,00). */
-		    rgba[i].r = rgba[i].g = rgba[i].b = 0;
+	if(header.mode == 3) { // palette or grayscale?
+	    rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
+	    if(!palette) {
+		fprintf(stderr, "Error: No palette found!\n");
+		exit(1);
+	    }
+	    /* 24->32 bit conversion */
+	    for(i=0;i<palettelen;i++) {
+		rgba[i].r = palette[i*3+0];
+		rgba[i].g = palette[i*3+1];
+		rgba[i].b = palette[i*3+2];
+		if(alphapalette && i<alphapalettelen) {
+		    rgba[i].a = alphapalette[i];
+		    if(alphapalette[i] == 0) {
+			/* if the color is fully transparent, it doesn't matter
+			   what it's rgb values are. furthermore, all Flash 
+			   players up to Flash 5 can't deal with anything beyond
+			   one transparent color with value (00,00,00,00). */
+			rgba[i].r = rgba[i].g = rgba[i].b = 0;
+		    }
+		} else {
+		    rgba[i].a = 255;
 		}
-	    } else {
-		rgba[i].a = 255;
+	    }
+	} else {
+	    palettelen = 256;
+	    rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
+	    for(i=0;i<256;i++) {
+		rgba[i].r = i;
+		rgba[i].g = i;
+		rgba[i].b = i;
 	    }
 	}