X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=lib%2Fmodules%2Fswfbits.c;h=a24b5703c9cc3bc408188be6b7e9f17506d21614;hb=cae49262e6983db10cbb1005c0130bed03f861a3;hp=a8b3e1f1243b34f150d0d7436bf4e91acbd8daf3;hpb=82eab4a92f9b19e2913fe2f5afd23cbb356bb955;p=swftools.git

diff --git a/lib/modules/swfbits.c b/lib/modules/swfbits.c
index a8b3e1f..a24b570 100644
--- a/lib/modules/swfbits.c
+++ b/lib/modules/swfbits.c
@@ -37,7 +37,31 @@ int swf_ImageHasAlpha(RGBA*img, int width, int height)
     return hasalpha;
 }
 
-int swf_ImageGetNumberOfPaletteEntries(RGBA*img, int width, int height, RGBA*palette)
+int swf_ImageGetNumberOfPaletteEntries2(RGBA*_img, int width, int height)
+{
+    int len = width*height;
+    int t;
+    U32* img = (U32*)_img;
+    U32 color1 = img[0];
+    U32 color2 = 0;
+    for(t=1;t<len;t++) {
+	if(img[t] != color1) {
+	    color2 = img[t];
+	    break;
+	}
+    }
+    if(t==len)
+	return 1;
+
+    for(;t<len;t++) {
+	if(img[t] != color1 && img[t] != color2) {
+	    return width*height;
+	}
+    }
+    return 2;
+}
+
+/*int swf_ImageGetNumberOfPaletteEntries(RGBA*img, int width, int height, RGBA*palette)
 {
     int len = width*height;
     int t;
@@ -76,8 +100,74 @@ int swf_ImageGetNumberOfPaletteEntries(RGBA*img, int width, int height, RGBA*pal
     if(palette)
 	memcpy(palette, pal, palsize*sizeof(RGBA));
     return palsize;
+}*/
+
+int swf_ImageGetNumberOfPaletteEntries(RGBA*img, int width, int height, RGBA*palette)
+{
+    int len = width*height;
+    int t;
+    int palsize = 0;
+    U32* pal;
+    int size[256];
+    int palette_overflow = 0;
+    U32 lastcol32 = 0;
+
+    pal = malloc(65536*sizeof(U32));
+
+    memset(size, 0, sizeof(size));
+
+    if(sizeof(RGBA)!=sizeof(U32))
+	fprintf(stderr, "rfxswf: sizeof(RGBA)!=sizeof(U32))");
+
+    lastcol32 = (*(U32*)&img[0])^0xffffffff; // don't match
+
+    for(t=0;t<len;t++) {
+	RGBA col = img[t];
+	U32 col32 = *(U32*)&img[t];
+	int i;
+	int csize;
+	U32 hash;
+	U32* cpal;
+	if(col32 == lastcol32)
+	    continue;
+	hash = (col32 >> 17) ^ col32;
+	hash ^= ((hash>>8) + 1) ^ hash;
+	hash &= 255;
+
+	csize = size[hash];
+	cpal = &pal[hash*256];
+	for(i=0;i<csize;i++) {
+	    if(col32 == cpal[i])
+		break;
+	}
+	if(i==csize) {
+	    if(palsize==256) {
+		palette_overflow = 1;
+		break;
+	    }
+	    cpal[size[hash]++] = col32;
+	    palsize++;
+	}
+	lastcol32 = col32;
+    }
+    if(palette_overflow)
+	return width*height;
+    if(palette) {
+	int i = 0;
+	for(t=0;t<256;t++) {
+	    int s;
+	    int csize = size[t];
+	    U32* cpal = &pal[t*256];
+	    for(s=0;s<csize;s++)
+		palette[i++] = *(RGBA*)(&cpal[s]);
+	}
+    }
+    free(pal);
+    return palsize;
 }
 
+
+
 #ifdef HAVE_JPEGLIB
 
 typedef struct _JPEGDESTMGR {
@@ -620,21 +710,22 @@ int swf_SetLosslessBitsGrayscale(TAG * t, U16 width, U16 height, U8 * bitmap)
 void swf_SetLosslessImage(TAG*tag, RGBA*data, int width, int height)
 {
     int hasalpha = swf_ImageHasAlpha(data, width, height);
+    int num;
     if(!hasalpha) {
 	tag->id = ST_DEFINEBITSLOSSLESS;
     } else {
 	tag->id = ST_DEFINEBITSLOSSLESS2;
 	/* TODO: premultiply alpha? */
     }
-    int num = swf_ImageGetNumberOfPaletteEntries(data, width, height, 0);
+    num = swf_ImageGetNumberOfPaletteEntries(data, width, height, 0);
     if(num>1 && num<=256) {
 	RGBA*palette = (RGBA*)malloc(sizeof(RGBA)*num);
-	swf_ImageGetNumberOfPaletteEntries(data, width, height, palette);
 	int width2 = BYTES_PER_SCANLINE(width);
 	U8*data2 = (U8*)malloc(width2*height);
 	int len = width*height;
 	int x,y;
 	int r;
+	swf_ImageGetNumberOfPaletteEntries(data, width, height, palette);
 	for(y=0;y<height;y++) {
 	    RGBA*src = &data[width*y];
 	    U8*dest = &data2[width2*y];
@@ -734,6 +825,8 @@ RGBA *swf_DefineLosslessBitsTagToImage(TAG * tag, int *dwidth, int *dheight)
 	    palette[t].b = data[pos++];
 	    if (alpha) {
 		palette[t].a = data[pos++];
+	    } else {
+		palette[t].a = 255;
 	    }
 	}
     }
@@ -753,7 +846,11 @@ RGBA *swf_DefineLosslessBitsTagToImage(TAG * tag, int *dwidth, int *dheight)
 		}
 	    } else {
 		for (x = 0; x < width; x++) {
-		    /* TODO: un-premultiply alpha? */
+		    /* TODO: premultiply alpha? 
+		    dest[pos2].r = (data[pos + 1]*255)/data[pos+0];
+		    dest[pos2].g = (data[pos + 2]*255)/data[pos+0];
+		    dest[pos2].b = (data[pos + 3]*255)/data[pos+0];
+		    */
 		    dest[pos2].r = data[pos + 1];
 		    dest[pos2].g = data[pos + 2];
 		    dest[pos2].b = data[pos + 3];
@@ -946,11 +1043,13 @@ void swf_RemoveJPEGTables(SWF * swf)
     tag = swf->firstTag;
     while (tag) {
 	if (tag->id == ST_DEFINEBITSJPEG) {
-	    void *data = rfx_alloc(tag->len);
+	    int len = tag->len;
+	    void *data = rfx_alloc(len);
 	    swf_GetBlock(tag, data, tag->len);
 	    swf_ResetTag(tag, ST_DEFINEBITSJPEG2);
+	    swf_SetBlock(tag, &((U8*)data)[0], 2); //id
 	    swf_SetBlock(tag, tables_tag->data, tables_tag->len);
-	    swf_SetBlock(tag, data, tag->len);
+	    swf_SetBlock(tag, &((U8*)data)[2], len-2);
 	    free(data);
 	}
 	tag = tag->next;
@@ -982,7 +1081,6 @@ static scale_lookup_t**make_scale_lookup(int width, int newwidth)
 
     if(newwidth<=width) {
 	for(x=0;x<newwidth;x++) {
-	    lblockx[x] = p_x;
 	    double ex = px + fx;
 	    int fromx = (int)px;
 	    int tox = (int)ex;
@@ -991,6 +1089,7 @@ static scale_lookup_t**make_scale_lookup(int width, int newwidth)
 	    int xweight = (int)(rem*256/fx);
 	    int xx;
 	    int w = 0;
+	    lblockx[x] = p_x;
 	    if(tox>=width) tox = width-1;
 	    for(xx=fromx;xx<=tox;xx++) {
 		if(xx==fromx && xx==tox) p_x->weight = 256;
@@ -1005,11 +1104,11 @@ static scale_lookup_t**make_scale_lookup(int width, int newwidth)
 	}
     } else {
 	for(x=0;x<newwidth;x++) {
-	    lblockx[x] = p_x;
 	    int ix1 = (int)px;
 	    int ix2 = ((int)px)+1;
-	    if(ix2>=width) ix2=width-1;
 	    double r = px-ix1;
+	    if(ix2>=width) ix2=width-1;
+	    lblockx[x] = p_x;
 	    if(bicubic)
 		r = -2*r*r*r+3*r*r;
 	    p_x[0].weight = (int)(256*(1-r));
@@ -1023,15 +1122,24 @@ static scale_lookup_t**make_scale_lookup(int width, int newwidth)
     lblockx[newwidth] = p_x;
     return lblockx;
 }
-
 RGBA* swf_ImageScale(RGBA*data, int width, int height, int newwidth, int newheight)
 {
-    if(newwidth<1 || newheight<1)
-	return 0;
     int x,y;
-    RGBA* newdata= (RGBA*)malloc(newwidth*newheight*sizeof(RGBA));
+    RGBA* newdata; 
     scale_lookup_t *p, **lblockx,**lblocky;
-    rgba_int_t*tmpline = (rgba_int_t*)malloc(width*sizeof(rgba_int_t));
+    rgba_int_t*tmpline;
+    
+    if(newwidth<1 || newheight<1)
+	return 0;
+
+    /* this is bad because this scaler doesn't yet handle monochrome
+       images with 2 colors in a way that the final image hasn't more
+       than 256 colors */
+    if(swf_ImageGetNumberOfPaletteEntries2(data, width, height) == 2)
+	fprintf(stderr, "Warning: scaling monochrome image\n");
+
+    tmpline = (rgba_int_t*)malloc(width*sizeof(rgba_int_t));
+    newdata = (RGBA*)malloc(newwidth*newheight*sizeof(RGBA));
   
     lblockx = make_scale_lookup(width, newwidth);
     lblocky = make_scale_lookup(height, newheight);
@@ -1044,7 +1152,7 @@ RGBA* swf_ImageScale(RGBA*data, int width, int height, int newwidth, int newheig
 	
 	/* create lookup table for y */
 	rgba_int_t*l = tmpline;
-	scale_lookup_t*p_y;
+	scale_lookup_t*p_y,*p_x;
 	memset(tmpline, 0, width*sizeof(rgba_int_t));
 	for(p_y=lblocky[y];p_y<lblocky[y+1];p_y++) {
 	    RGBA*line = &data[p_y->pos];
@@ -1059,7 +1167,7 @@ RGBA* swf_ImageScale(RGBA*data, int width, int height, int newwidth, int newheig
 	}
 
 	/* process x direction */
-	scale_lookup_t*p_x = lblockx[0];
+	p_x = lblockx[0];
 	for(x=0;x<newwidth;x++) {
 	    unsigned int r=0,g=0,b=0,a=0;
 	    scale_lookup_t*p_x_to = lblockx[x+1];