bugfix in spline conversion

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

diff --git a/lib/devices/opengl.c b/lib/devices/opengl.c
index 955b60e..a9459a1 100644 (file)
--- a/lib/devices/opengl.c
+++ b/lib/devices/opengl.c
@@ -29,8 +29,7 @@ typedef struct _internal {
     GLUtesselator *tesselator_tex;
 } internal_t;
 
-int verbose = 1;
-
+static int verbose = 1;
 static void dbg(char*format, ...)
 {
     char buf[1024];
@@ -76,6 +75,15 @@ void CALLBACK vertexCallback(GLvoid *vertex)
    double*xyz = (GLdouble*)vertex;
    glVertex3d(xyz[0],xyz[1],xyz[2]);
 }
+void CALLBACK combineCallback(GLdouble coords[3], GLdouble *data[4], GLfloat w[4], GLdouble **out)
+{
+   GLdouble *vertex;
+   vertex = (GLdouble *) malloc(6 * sizeof(GLdouble));
+   vertex[0] = coords[0];
+   vertex[1] = coords[1];
+   vertex[2] = coords[2];
+   *out = vertex;
+}
 void CALLBACK vertexCallbackTex(GLvoid *vertex)
 {
    double*v = (GLdouble*)vertex;
@@ -122,6 +130,7 @@ void opengl_endclip(struct _gfxdevice*dev)
 
 void opengl_stroke(struct _gfxdevice*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
 {
+    dbg("stroke");
     internal_t*i = (internal_t*)dev->internal;
     char running = 0;
     gfxline_t*l=0;
@@ -153,10 +162,12 @@ void opengl_stroke(struct _gfxdevice*dev, gfxline_t*line, gfxcoord_t width, gfxc
 
 void opengl_fill(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color)
 {
+    dbg("fill");
     internal_t*i = (internal_t*)dev->internal;
     char running = 0;
     int len = 0;
     double*xyz=0;
+    double lastx=0,lasty=0;
     gfxline_t*l=0;
     dbg("fill");
     glColor4f(color->r/255.0, color->g/255.0, color->b/255.0, color->a/255.0);
@@ -165,9 +176,18 @@ void opengl_fill(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color)
     l = line;
     len = 0;
     while(l) {
-       len++;
+       if(l->type == gfx_splineTo) {
+            double c = sqrt(abs(l->x-2*l->sx+lastx) + abs(l->y-2*l->sy+lasty))/2;
+           int steps = (int)c;
+           if(steps<1) steps = 1;
+           len += steps;
+       } else {
+           len++;
+       }
        l = l->next;
     }
+    //printf("full len:%d\n", len);
+    double z = (i->currentz*ZSTEP);
     xyz = malloc(sizeof(double)*3*len);
     l = line;
     len = 0;
@@ -183,11 +203,33 @@ void opengl_fill(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color)
            gluTessBeginContour(i->tesselator);
        }
 
-       xyz[len*3+0] = l->x;
-       xyz[len*3+1] = l->y;
-       xyz[len*3+2] = (i->currentz*ZSTEP);
-       gluTessVertex(i->tesselator, &xyz[len*3], &xyz[len*3]);
-       len++;
+       if(l->type == gfx_splineTo) {
+           int j;
+            double c = sqrt(abs(l->x-2*l->sx+lastx) + abs(l->y-2*l->sy+lasty))/2;
+           int steps = (int)c;
+           if(steps<1) steps = 1;
+           //printf("c=%f d1=%f (%f/%f) d2=%f (%f/%f)\n", c,d1,l->x-l->sx,l->y-l->sy,d2,lastx-l->sx,lasty-l->sy);
+           //printf("%f %f %f\n", lastx, l->sx, l->x);
+           //printf("%f %f %f\n", lasty, l->sy, l->y);
+           for(j=1;j<=steps;j++) {
+               //printf("%d\n", j);
+               double t = (double)j / (double)steps;
+               xyz[len*3+0] = lastx*(1-t)*(1-t) + 2*l->sx*(1-t)*t + l->x*t*t;
+               xyz[len*3+1] = lasty*(1-t)*(1-t) + 2*l->sy*(1-t)*t + l->y*t*t;
+               xyz[len*3+2] = z;
+               gluTessVertex(i->tesselator, &xyz[len*3], &xyz[len*3]);
+               len++;
+           }
+           //printf("%d\n", len);
+       } else {
+           xyz[len*3+0] = l->x;
+           xyz[len*3+1] = l->y;
+           xyz[len*3+2] = z;
+           gluTessVertex(i->tesselator, &xyz[len*3], &xyz[len*3]);
+           len++;
+       }
+       lastx = l->x;
+       lasty = l->y;
 
        l=l->next;
     }
@@ -202,6 +244,7 @@ void opengl_fill(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color)
 
 void opengl_fillbitmap(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
 {
+    dbg("fillbitmap");
     internal_t*i = (internal_t*)dev->internal;
     char running = 0;
     int len = 0;
@@ -252,6 +295,7 @@ void opengl_fillbitmap(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gf
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
     
+    
     gluTessBeginPolygon(i->tesselator_tex, NULL);
     l = line;
     len = 0;
@@ -286,6 +330,7 @@ void opengl_fillbitmap(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gf
 
        l=l->next;
     }
+
     if(running) {
        running = 0;
        gluTessEndContour(i->tesselator_tex);
@@ -425,6 +470,7 @@ void gfxdevice_opengl_init(gfxdevice_t*dev)
     gluTessCallback(i->tesselator, GLU_TESS_VERTEX, (callbackfunction_t)vertexCallback);
     gluTessCallback(i->tesselator, GLU_TESS_BEGIN, (callbackfunction_t)beginCallback);
     gluTessCallback(i->tesselator, GLU_TESS_END, (callbackfunction_t)endCallback);
+    //gluTessCallback(i->tesselator, GLU_TESS_END, (callbackfunction_t)combineCallback);
     
     i->tesselator_tex = gluNewTess();
     gluTessCallback(i->tesselator_tex, GLU_TESS_ERROR, (callbackfunction_t)errorCallback);