support for multiple softmasks on the same level

[swftools.git] / lib / pdf / GFXOutputDev.cc

diff --git a/lib/pdf/GFXOutputDev.cc b/lib/pdf/GFXOutputDev.cc
index 88fa728..881236c 100644 (file)
--- a/lib/pdf/GFXOutputDev.cc
+++ b/lib/pdf/GFXOutputDev.cc
@@ -73,13 +73,13 @@
 #include "../devices/polyops.h"
 #include "../devices/render.h"
 
-#include "../art/libart.h"
-
 #include "../png.h"
 #include "fonts.h"
 
 #include <math.h>
 
+#define SQRT2 1.41421356237309504880
+
 typedef struct _fontfile
 {
     const char*filename;
@@ -1026,14 +1026,13 @@ void GFXOutputDev::endPage()
        device->endclip(device);
        outer_clip_box = 0;
     }
-    if(this->dashPattern) {
-        free(this->dashPattern);
-        this->dashPattern = 0;
-    }
+    this->dashPattern = 0;
     /* notice: we're not fully done yet with this page- there might still be 
        a few calls to drawLink() yet to come */
 }
 
+static inline double sqr(double x) {return x*x;}
+
 #define STROKE_FILL 1
 #define STROKE_CLIP 2
 void GFXOutputDev::strokeGfxline(GfxState *state, gfxline_t*line, int flags)
@@ -1067,13 +1066,29 @@ void GFXOutputDev::strokeGfxline(GfxState *state, gfxline_t*line, int flags)
 
     gfxline_t*line2 = 0;
 
-    if(0 && this->dashLength && this->dashPattern) {
+    if(this->dashLength && this->dashPattern) {
        float * dash = (float*)malloc(sizeof(float)*(this->dashLength+1));
        int t;
+
+        /* try to find out how much the transformation matrix would
+           stretch the dashes, and factor that into the dash lengths.
+           This is not the entirely correct approach- it would be 
+           better to first convert the path to an unscaled version,
+           then apply dashing, and then transform the path using
+           the current transformation matrix. However there are few
+           PDFs which actually stretch a dashed path in a non-orthonormal
+           way */
+        double tx1, ty1, tx2, ty2;
+       this->transformXY(state, 0, 0, &tx1, &ty1);
+       this->transformXY(state, 1, 1, &tx2, &ty2);
+        double f = sqrt(sqr(tx2-tx1)+sqr(ty2-ty1)) / SQRT2;
+
+       f = 1.0; //disable dash length transform for now
+
        msg("<trace> %d dashes", this->dashLength);
        msg("<trace> |  phase: %f", this->dashStart);
        for(t=0;t<this->dashLength;t++) {
-           dash[t] = (float)this->dashPattern[t];
+           dash[t] = (float)this->dashPattern[t] * f;
            msg("<trace> |  d%-3d: %f", t, this->dashPattern[t]);
        }
        dash[this->dashLength] = -1;
@@ -1081,7 +1096,7 @@ void GFXOutputDev::strokeGfxline(GfxState *state, gfxline_t*line, int flags)
            dump_outline(line);
        }
 
-       line2 = gfxtool_dash_line(line, dash, (float)this->dashStart);
+       line2 = gfxtool_dash_line(line, dash, (float)(this->dashStart*f));
        line = line2;
        free(dash);
        msg("<trace> After dashing:");
@@ -1113,7 +1128,7 @@ void GFXOutputDev::strokeGfxline(GfxState *state, gfxline_t*line, int flags)
         } else {
             device->fill(device, gfxline, &col);
         }
-        free(gfxline);
+        gfxline_free(gfxline);
        gfxpoly_free(poly);
     } else {
         if(flags&STROKE_CLIP) 
@@ -1724,7 +1739,7 @@ void GFXOutputDev::processLink(Link *link, Catalog *catalog)
 }
 
 void GFXOutputDev::saveState(GfxState *state) {
-    dbg("saveState");dbgindent+=2;
+    dbg("saveState"); dbgindent+=2;
 
     msg("<trace> saveState");
     updateAll(state);
@@ -2546,11 +2561,11 @@ void GFXOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
                                      GBool forSoftMask)
 {
     const char*colormodename = "";
-
+  
     if(blendingColorSpace) {
        colormodename = GfxColorSpace::getColorSpaceModeName(blendingColorSpace->getMode());
     }
-    dbg("beginTransparencyGroup %.1f/%.1f/%.1f/%.1f %s isolated=%d knockout=%d forsoftmask=%d", bbox[0],bbox[1],bbox[2],bbox[3], colormodename, isolated, knockout, forSoftMask);
+    dbg("beginTransparencyGroup device=%08x %.1f/%.1f/%.1f/%.1f %s isolated=%d knockout=%d forsoftmask=%d", device, bbox[0],bbox[1],bbox[2],bbox[3], colormodename, isolated, knockout, forSoftMask);
     msg("<verbose> beginTransparencyGroup %.1f/%.1f/%.1f/%.1f %s isolated=%d knockout=%d forsoftmask=%d", bbox[0],bbox[1],bbox[2],bbox[3], colormodename, isolated, knockout, forSoftMask);
     
     //states[statepos].createsoftmask |= forSoftMask;
@@ -2628,8 +2643,14 @@ void GFXOutputDev::paintTransparencyGroup(GfxState *state, double *bbox)
 
 void GFXOutputDev::setSoftMask(GfxState *state, double *bbox, GBool alpha, Function *transferFunc, GfxColor *rgb)
 {
+    if(states[statepos].softmask) {
+       /* shouldn't happen, but *does* happen */
+       clearSoftMask(state);
+    }
+
     /* alpha = 1: retrieve mask values from alpha layer
        alpha = 0: retrieve mask values from luminance */
+
     dbg("setSoftMask %.1f/%.1f/%.1f/%.1f alpha=%d backdrop=%02x%02x%02x",
            bbox[0], bbox[1], bbox[2], bbox[3], alpha, colToByte(rgb->c[0]), colToByte(rgb->c[1]), colToByte(rgb->c[2]));
     msg("<verbose> setSoftMask %.1f/%.1f/%.1f/%.1f alpha=%d backdrop=%02x%02x%02x",
@@ -2643,7 +2664,7 @@ void GFXOutputDev::setSoftMask(GfxState *state, double *bbox, GBool alpha, Funct
     this->device = (gfxdevice_t*)rfx_calloc(sizeof(gfxdevice_t));
     gfxdevice_record_init(this->device);
 
-    dbg("softmaskrecording is %08x at statepos %d\n", states[statepos].softmaskrecording, statepos);
+    dbg("softmaskrecording is %08x (dev=%08x) at statepos %d\n", states[statepos].softmaskrecording, this->device, statepos);
     
     states[statepos].softmask = 1;
     states[statepos].softmask_alpha = alpha;
@@ -2666,7 +2687,7 @@ void GFXOutputDev::clearSoftMask(GfxState *state)
        return;
     states[statepos].softmask = 0;
     dbg("clearSoftMask statepos=%d", statepos);
-    msg("<verbose> clearSoftMask");
+    msg("<verbose> clearSoftMask statepos=%d", statepos);
     
     if(!states[statepos].softmaskrecording || strcmp(this->device->name, "record")) {
        msg("<error> Error in softmask/tgroup ordering");