fixed a few bugs in remove_font_transforms filter

[swftools.git] / lib / devices / rescale.c

diff --git a/lib/devices/rescale.c b/lib/devices/rescale.c
index e82aed6..350dfd2 100644 (file)
--- a/lib/devices/rescale.c
+++ b/lib/devices/rescale.c
@@ -54,7 +54,7 @@ static void dbg(char*format, ...)
     int l;
     va_list arglist;
     va_start(arglist, format);
-    vsprintf(buf, format, arglist);
+    vsnprintf(buf, sizeof(buf)-1, format, arglist);
     va_end(arglist);
     l = strlen(buf);
     while(l && buf[l-1]=='\n') {
@@ -121,6 +121,12 @@ int rescale_setparameter(gfxdevice_t*dev, const char*key, const char*value)
     if(!strcmp(key, "keepratio")) {
        i->keepratio = atoi(value);
        return 1;
+    } else if(!strcmp(key, "centerx")) {
+       i->centerx = atoi(value);
+       return 1;
+    } else if(!strcmp(key, "centery")) {
+       i->centery = atoi(value);
+       return 1;
     } else {
        if(i->out) {
            return i->out->setparameter(i->out,key,value);
@@ -137,31 +143,37 @@ void rescale_startpage(gfxdevice_t*dev, int width, int height)
     i->origwidth = width;
     i->origheight = height;
 
-    if(i->targetwidth && i->targetheight) {
+    if(i->targetwidth || i->targetheight) {
+        int targetwidth = i->targetwidth;
+        if(!targetwidth)
+            targetwidth = width*i->targetheight/height;
+        int targetheight = i->targetheight;
+        if(!targetheight)
+            targetheight = height*i->targetwidth/width;
        if(i->keepratio) {
-           double rx = (double)i->targetwidth / (double)width;
-           double ry = (double)i->targetheight / (double)height;
+           double rx = (double)targetwidth / (double)width;
+           double ry = (double)targetheight / (double)height;
            if(rx<ry) {
                i->matrix.m00 = rx;
                i->matrix.m11 = rx;
                i->matrix.tx = 0;
                if(i->centery) {
-                   i->matrix.ty = (i->targetheight - height*rx) / 2;
+                   i->matrix.ty = (targetheight - height*rx) / 2;
                }
            } else {
                i->matrix.m00 = ry;
                i->matrix.m11 = ry;
                if(i->centerx) {
-                   i->matrix.tx = (i->targetwidth - width*ry) / 2;
+                   i->matrix.tx = (targetwidth - width*ry) / 2;
                }
                i->matrix.ty = 0;
            }
        } else {
-           i->matrix.m00 = (double)i->targetwidth / (double)width;
-           i->matrix.m11 = (double)i->targetheight / (double)height;
+           i->matrix.m00 = (double)targetwidth / (double)width;
+           i->matrix.m11 = (double)targetheight / (double)height;
        }
        i->zoomwidth = sqrt(i->matrix.m00*i->matrix.m11);
-       i->out->startpage(i->out,i->targetwidth,i->targetheight);
+       i->out->startpage(i->out,targetwidth,targetheight);
     } else {
        i->out->startpage(i->out,(int)(width*i->matrix.m00),(int)(height*i->matrix.m11));
     }
@@ -319,3 +331,10 @@ void gfxdevice_rescale_setdevice(gfxdevice_t*dev, gfxdevice_t*out)
     }
     i->out = out;
 }
+
+gfxdevice_t* gfxdevice_rescale_new(gfxdevice_t*out, int width, int height, double scale)
+{
+    gfxdevice_t* d = (gfxdevice_t*)malloc(sizeof(gfxdevice_t));
+    gfxdevice_rescale_init(d, out, width, height, scale);
+    return d;
+}