remove unused parts of raskter module.

1 files changed, 66 insertions, 1128 deletions

diff --git a/intern/raskter/raskter.c b/intern/raskter/raskter.c
index 875dfc8a63b..af58c2aca4d 100644
--- a/intern/raskter/raskter.c
+++ b/intern/raskter/raskter.c
@@ -30,22 +30,67 @@
 
 #include <stdlib.h>
 #include "raskter.h"
-//#define __PLX__FAKE_AA__
-//#define __PLX_KD_TREE__
-#ifdef __PLX_KD_TREE__
-#include "kdtree.h"
-#endif
 
+/* from BLI_utildefines.h */
+#define MIN2(x, y)               ( (x) < (y) ? (x) : (y) )
+#define MAX2(x, y)               ( (x) > (y) ? (x) : (y) )
+#define ABS(a)                   ( (a) < 0 ? (-(a)) : (a) )
 
-// this is needed for inlining behavior
-#if defined _MSC_VER
-#   define DO_INLINE __inline
-#elif defined (__sun) || defined (__sun__)
-#   define DO_INLINE
-#else
-#   define DO_INLINE static inline
-#endif
+struct poly_vert {
+    int x;
+    int y;
+};
+
+struct scan_line {
+    int xstart;
+    int xend;
+};
 
+struct scan_line_batch {
+    int num;
+    int ystart;
+    struct scan_line *slines;
+};
+
+struct e_status {
+    int x;
+    int ybeg;
+    int xshift;
+    int xdir;
+    int drift;
+    int drift_inc;
+    int drift_dec;
+    int num;
+    struct e_status *e_next;
+};
+
+struct r_buffer_stats {
+    float *buf;
+    int sizex;
+    int sizey;
+    int ymin;
+    int ymax;
+    int xmin;
+    int xmax;
+};
+
+struct r_fill_context {
+    struct e_status *all_edges, *possible_edges;
+    struct r_buffer_stats rb;
+    struct scan_line *bounds;
+    void *kdo;  //only used with kd tree
+    void *kdi;  //only used with kd tree
+    int *bound_indexes;
+    int bounds_length;
+};
+
+struct layer_init_data {
+	struct poly_vert *imask;
+	struct poly_vert *omask;
+	struct scan_line *bounds;
+	int *bound_indexes;
+	int bounds_length;
+};
 
 /*
  * Sort all the edges of the input polygon by Y, then by X, of the "first" vertex encountered.
@@ -55,7 +100,7 @@
  * just the poly. Since the DEM code could end up being coupled with this, we'll keep it separate
  * for now.
  */
-void preprocess_all_edges(struct r_fill_context *ctx, struct poly_vert *verts, int num_verts, struct e_status *open_edge) {
+static void preprocess_all_edges(struct r_fill_context *ctx, struct poly_vert *verts, int num_verts, struct e_status *open_edge) {
     int i;
     int xbeg;
     int ybeg;
@@ -384,17 +429,12 @@ static int rast_scan_fill(struct r_fill_context *ctx, struct poly_vert *verts, i
 }
 
 int PLX_raskterize(float(*base_verts)[2], int num_base_verts,
-                   float *buf, int buf_x, int buf_y, int do_mask_AA) {
-    int subdiv_AA = (do_mask_AA != 0)? 0:0;
+                   float *buf, int buf_x, int buf_y) {
     int i;                                   /* i: Loop counter. */
-    int sAx;
-    int sAy;
     struct poly_vert *ply;                   /* ply: Pointer to a list of integer buffer-space vertex coordinates. */
     struct r_fill_context ctx = {0};
     const float buf_x_f = (float)(buf_x);
     const float buf_y_f = (float)(buf_y);
-    float div_offset=(1.0f / (float)(subdiv_AA));
-    float div_offset_static = 0.5f * (float)(subdiv_AA) * div_offset;
     /*
      * Allocate enough memory for our poly_vert list. It'll be the size of the poly_vert
      * data structure multiplied by the number of base_verts.
@@ -418,1115 +458,13 @@ int PLX_raskterize(float(*base_verts)[2], int num_base_verts,
      * drawn will be 1.0f in value, there is no anti-aliasing.
      */
 
-    if(!subdiv_AA) {
-        for(i = 0; i < num_base_verts; i++) {                           /* Loop over all base_verts. */
-            ply[i].x = (int)((base_verts[i][0] * buf_x_f) + 0.5f);       /* Range expand normalized X to integer buffer-space X. */
-            ply[i].y = (int)((base_verts[i][1] * buf_y_f) + 0.5f); /* Range expand normalized Y to integer buffer-space Y. */
-        }
+	for(i = 0; i < num_base_verts; i++) {                           /* Loop over all base_verts. */
+		ply[i].x = (int)((base_verts[i][0] * buf_x_f) + 0.5f);       /* Range expand normalized X to integer buffer-space X. */
+		ply[i].y = (int)((base_verts[i][1] * buf_y_f) + 0.5f); /* Range expand normalized Y to integer buffer-space Y. */
+	}
+
+	i = rast_scan_fill(&ctx, ply, num_base_verts,1.0f);  /* Call our rasterizer, passing in the integer coords for each vert. */
 
-        i = rast_scan_fill(&ctx, ply, num_base_verts,1.0f);  /* Call our rasterizer, passing in the integer coords for each vert. */
-    } else {
-        for(sAx=0; sAx < subdiv_AA; sAx++) {
-            for(sAy=0; sAy < subdiv_AA; sAy++) {
-                for(i=0; i < num_base_verts; i++) {
-                    ply[i].x = (int)((base_verts[i][0]*buf_x_f)+0.5f - div_offset_static + (div_offset*(float)(sAx)));
-                    ply[i].y = (int)((base_verts[i][1]*buf_y_f)+0.5f - div_offset_static + (div_offset*(float)(sAy)));
-                }
-                i = rast_scan_fill(&ctx, ply, num_base_verts,(1.0f / (float)(subdiv_AA*subdiv_AA)));
-            }
-        }
-    }
     free(ply);                                      /* Free the memory allocated for the integer coordinate table. */
     return(i);                                      /* Return the value returned by the rasterizer. */
 }
-
-/*
- * This function clips drawing to the frame buffer. That clipping will likely be moved into the preprocessor
- * for speed, but waiting on final design choices for curve-data before eliminating data the DEM code will need
- * if it ends up being coupled with this function.
- */
-static int rast_scan_feather(struct r_fill_context *ctx,
-                             float(*base_verts_f)[2], int num_base_verts,
-                             struct poly_vert *feather_verts, float(*feather_verts_f)[2], int num_feather_verts) {
-    int x_curr;                 /* current pixel position in X */
-    int y_curr;                 /* current scan line being drawn */
-    int yp;                     /* y-pixel's position in frame buffer */
-    int swixd = 0;              /* whether or not edges switched position in X */
-    float *cpxl;                /* pixel pointers... */
-    float *mpxl;
-    float *spxl;
-    struct e_status *e_curr;    /* edge pointers... */
-    struct e_status *e_temp;
-    struct e_status *edgbuf;
-    struct e_status **edgec;
-
-    /* from dem */
-    int a;                          // a = temporary pixel index buffer loop counter
-    float fsz;                        // size of the frame
-    unsigned int rsl;               // long used for finding fast 1.0/sqrt
-    float rsf;                      // float used for finding fast 1.0/sqrt
-    const float rsopf = 1.5f;       // constant float used for finding fast 1.0/sqrt
-
-    //unsigned int gradientFillOffset;
-    float t;
-    float ud;                // ud = unscaled edge distance
-    float dmin;              // dmin = minimum edge distance
-    float odist;                    // odist = current outer edge distance
-    float idist;                    // idist = current inner edge distance
-    float dx;                         // dx = X-delta (used for distance proportion calculation)
-    float dy;                         // dy = Y-delta (used for distance proportion calculation)
-    float xpxw = (1.0f / (float)(ctx->rb.sizex));  // xpxw = normalized pixel width
-    float ypxh = (1.0f / (float)(ctx->rb.sizey));  // ypxh = normalized pixel height
-#ifdef __PLX_KD_TREE__
-    void *res_kdi;
-    void *res_kdo;
-    float clup[2];
-#endif
-
-    /*
-     * If the number of verts specified to render as a polygon is less than 3,
-     * return immediately. Obviously we cant render a poly with sides < 3. The
-     * return for this we set to 1, simply so it can be distinguished from the
-     * next place we could return,
-     * which is a failure to allocate memory.
-     */
-    if(num_feather_verts < 3) {
-        return(1);
-    }
-
-    /*
-     * Try to allocate an edge buffer in memory. needs to be the size of the edge tracking data
-     * multiplied by the number of edges, which is always equal to the number of verts in
-     * a 2D polygon. Here we return 0 to indicate a memory allocation failure, as opposed to a 1 for
-     * the preceeding error, which was a rasterization request on a 2D poly with less than
-     * 3 sides.
-     */
-    if((edgbuf = (struct e_status *)(malloc(sizeof(struct e_status) * num_feather_verts))) == NULL) {
-        return(0);
-    }
-
-    /*
-     * Do some preprocessing on all edges. This constructs a table structure in memory of all
-     * the edge properties and can "flip" some edges so sorting works correctly.
-     */
-    preprocess_all_edges(ctx, feather_verts, num_feather_verts, edgbuf);
-
-    /* can happen with a zero area mask */
-    if (ctx->all_edges == NULL) {
-        free(edgbuf);
-        return(1);
-    }
-
-    /*
-     * Set the pointer for tracking the edges currently in processing to NULL to make sure
-     * we don't get some crazy value after initialization.
-     */
-    ctx->possible_edges = NULL;
-
-    /*
-     * Loop through all scan lines to be drawn. Since we sorted by Y values during
-     * preprocess_all_edges(), we can already exact values for the lowest and
-     * highest Y values we could possibly need by induction. The preprocessing sorted
-     * out edges by Y position, we can cycle the current edge being processed once
-     * it runs out of Y pixels. When we have no more edges, meaning the current edge
-     * is NULL after setting the "current" edge to be the previous current edge's
-     * "next" edge in the Y sorted edge connection chain, we can stop looping Y values,
-     * since we can't possibly have more scan lines if we ran out of edges. :)
-     *
-     * TODO: This clips Y to the frame buffer, which should be done in the preprocessor, but for now is done here.
-     *       Will get changed once DEM code gets in.
-     */
-    for(y_curr = ctx->all_edges->ybeg; (ctx->all_edges || ctx->possible_edges); y_curr++) {
-
-        /*
-         * Link any edges that start on the current scan line into the list of
-         * edges currently needed to draw at least this, if not several, scan lines.
-         */
-
-        /*
-         * Set the current edge to the beginning of the list of edges to be rasterized
-         * into this scan line.
-         *
-         * We could have lots of edge here, so iterate over all the edges needed. The
-         * preprocess_all_edges() function sorted edges by X within each chunk of Y sorting
-         * so we safely cycle edges to thier own "next" edges in order.
-         *
-         * At each iteration, make sure we still have a non-NULL edge.
-         */
-        for(edgec = &ctx->possible_edges; ctx->all_edges && (ctx->all_edges->ybeg == y_curr);) {
-            x_curr = ctx->all_edges->x;                  /* Set current X position. */
-            for(;;) {                                    /* Start looping edges. Will break when edges run out. */
-                e_curr = *edgec;                         /* Set up a current edge pointer. */
-                if(!e_curr || (e_curr->x >= x_curr)) {   /* If we have an no edge, or we need to skip some X-span, */
-                    e_temp = ctx->all_edges->e_next;     /* set a temp "next" edge to test. */
-                    *edgec = ctx->all_edges;             /* Add this edge to the list to be scanned. */
-                    ctx->all_edges->e_next = e_curr;     /* Set up the next edge. */
-                    edgec = &ctx->all_edges->e_next;     /* Set our list to the next edge's location in memory. */
-                    ctx->all_edges = e_temp;             /* Skip the NULL or bad X edge, set pointer to next edge. */
-                    break;                               /* Stop looping edges (since we ran out or hit empty X span. */
-                } else {
-                    edgec = &e_curr->e_next;             /* Set the pointer to the edge list the "next" edge. */
-                }
-            }
-        }
-
-        /*
-         * Determine the current scan line's offset in the pixel buffer based on its Y position.
-         * Basically we just multiply the current scan line's Y value by the number of pixels in each line.
-         */
-        yp = y_curr * ctx->rb.sizex;
-        /*
-         * Set a "scan line pointer" in memory. The location of the buffer plus the row offset.
-         */
-        spxl = ctx->rb.buf + (yp);
-        /*
-         * Set up the current edge to the first (in X) edge. The edges which could possibly be in this
-         * list were determined in the preceeding edge loop above. They were already sorted in X by the
-         * initial processing function.
-         *
-         * At each iteration, test for a NULL edge. Since we'll keep cycling edge's to their own "next" edge
-         * we will eventually hit a NULL when the list runs out.
-         */
-        for(e_curr = ctx->possible_edges; e_curr; e_curr = e_curr->e_next) {
-            /*
-             * Calculate a span of pixels to fill on the current scan line.
-             *
-             * Set the current pixel pointer by adding the X offset to the scan line's start offset.
-             * Cycle the current edge the next edge.
-             * Set the max X value to draw to be one less than the next edge's first pixel. This way we are
-             * sure not to ever get into a situation where we have overdraw. (drawing the same pixel more than
-             * one time because it's on a vertex connecting two edges)
-             *
-             * Then blast through all the pixels in the span, advancing the pointer and setting the color to white.
-             *
-             * TODO: Here we clip to the scan line, this is not efficient, and should be done in the preprocessor,
-             *       but for now it is done here until the DEM code comes in.
-             */
-
-            /* set up xmin and xmax bounds on this scan line */
-            cpxl = spxl + MAX2(e_curr->x, 0);
-            e_curr = e_curr->e_next;
-            mpxl = spxl + MIN2(e_curr->x, ctx->rb.sizex) - 1;
-
-            if((y_curr >= 0) && (y_curr < ctx->rb.sizey)) {
-                t = ((float)((cpxl - spxl) % ctx->rb.sizex) + 0.5f) * xpxw;
-                fsz = ((float)(y_curr) + 0.5f) * ypxh;
-                /* draw the pixels. */
-                for(; cpxl <= mpxl; cpxl++, t += xpxw) {
-                    //do feather check
-                    // first check that pixel isn't already full, and only operate if it is not
-                    if(*cpxl < 0.9999f) {
-#ifndef __PLX_KD_TREE__
-                        dmin = 2.0f;                        // reset min distance to edge pixel
-                        for(a = 0; a < num_feather_verts; a++) {  // loop through all outer edge buffer pixels
-                            dx = t - feather_verts_f[a][0];          // set dx to gradient pixel column - outer edge pixel row
-                            dy = fsz - feather_verts_f[a][1];        // set dy to gradient pixel row - outer edge pixel column
-                            ud = dx * dx + dy * dy;               // compute sum of squares
-                            if(ud < dmin) {                       // if our new sum of squares is less than the current minimum
-                                dmin = ud;                        // set a new minimum equal to the new lower value
-                            }
-                        }
-                        odist = dmin;                    // cast outer min to a float
-                        rsf = odist * 0.5f;                       //
-                        rsl = *(unsigned int *)&odist;            // use some peculiar properties of the way bits are stored
-                        rsl = 0x5f3759df - (rsl >> 1);            // in floats vs. unsigned ints to compute an approximate
-                        odist = *(float *)&rsl;                   // reciprocal square root
-                        odist = odist * (rsopf - (rsf * odist * odist));  // -- ** this line can be iterated for more accuracy ** --
-                        odist = odist * (rsopf - (rsf * odist * odist));
-                        dmin = 2.0f;                        // reset min distance to edge pixel
-                        for(a = 0; a < num_base_verts; a++) {     // loop through all inside edge pixels
-                            dx = t - base_verts_f[a][0];             // compute delta in Y from gradient pixel to inside edge pixel
-                            dy = fsz - base_verts_f[a][1];           // compute delta in X from gradient pixel to inside edge pixel
-                            ud = dx * dx + dy * dy;   // compute sum of squares
-                            if(ud < dmin) {           // if our new sum of squares is less than the current minimum we've found
-                                dmin = ud;            // set a new minimum equal to the new lower value
-                            }
-                        }
-                        idist = dmin;                    // cast inner min to a float
-                        rsf = idist * 0.5f;                       //
-                        rsl = *(unsigned int *)&idist;            //
-                        rsl = 0x5f3759df - (rsl >> 1);            // see notes above
-                        idist = *(float *)&rsl;                   //
-                        idist = idist * (rsopf - (rsf * idist * idist));  //
-                        idist = idist * (rsopf - (rsf * idist * idist));
-                        /*
-                         * Note once again that since we are using reciprocals of distance values our
-                         * proportion is already the correct intensity, and does not need to be
-                         * subtracted from 1.0 like it would have if we used real distances.
-                         */
-#else
-                        clup[0]=t;
-                        clup[1]=fsz;
-                        res_kdi=kd_nearestf(ctx->kdi,clup);
-                        res_kdo=kd_nearestf(ctx->kdo,clup);
-                        kd_res_itemf(res_kdi,clup);
-                        dx=t-clup[0];
-                        dy=fsz-clup[1];
-                        idist=dx*dx+dy*dy;
-                        rsf = idist * 0.5f;                       //
-                        rsl = *(unsigned int *)&idist;            //
-                        rsl = 0x5f3759df - (rsl >> 1);            // see notes above
-                        idist = *(float *)&rsl;                   //
-                        idist = idist * (rsopf - (rsf * idist * idist));  //
-                        idist = idist * (rsopf - (rsf * idist * idist));
-                        kd_res_itemf(res_kdo,clup);
-                        dx=t-clup[0];
-                        dy=fsz-clup[1];
-                        odist=dx*dx+dy*dy;
-                        rsf = odist * 0.5f;                       //
-                        rsl = *(unsigned int *)&odist;            // use some peculiar properties of the way bits are stored
-                        rsl = 0x5f3759df - (rsl >> 1);            // in floats vs. unsigned ints to compute an approximate
-                        odist = *(float *)&rsl;                   // reciprocal square root
-                        odist = odist * (rsopf - (rsf * odist * odist));  // -- ** this line can be iterated for more accuracy ** --
-                        odist = odist * (rsopf - (rsf * odist * odist));
-
-#endif
-                        /* set intensity, do the += so overlapping gradients are additive */
-                        *cpxl = (idist / (idist+odist));
-                    }
-                }
-            }
-        }
-
-        /*
-         * Loop through all edges of polygon that could be hit by this scan line,
-         * and figure out their x-intersections with the next scan line.
-         *
-         * Either A.) we wont have any more edges to test, or B.) we just add on the
-         * slope delta computed in preprocessing step. Since this draws non-antialiased
-         * polygons, we dont have fractional positions, so we only move in x-direction
-         * when needed to get all the way to the next pixel over...
-         */
-        for(edgec = &ctx->possible_edges; (e_curr = *edgec);) {
-            if(!(--(e_curr->num))) {
-                *edgec = e_curr->e_next;
-            } else {
-                e_curr->x += e_curr->xshift;
-                if((e_curr->drift += e_curr->drift_inc) > 0) {
-                    e_curr->x += e_curr->xdir;
-                    e_curr->drift -= e_curr->drift_dec;
-                }
-                edgec = &e_curr->e_next;
-            }
-        }
-        /*
-         * It's possible that some edges may have crossed during the last step, so we'll be sure
-         * that we ALWAYS intersect scan lines in order by shuffling if needed to make all edges
-         * sorted by x-intersection coordinate. We'll always scan through at least once to see if
-         * edges crossed, and if so, we set the 'swixd' flag. If 'swixd' gets set on the initial
-         * pass, then we know we need to sort by x, so then cycle through edges again and perform
-         * the sort.-
-         */
-        if(ctx->possible_edges) {
-            for(edgec = &ctx->possible_edges; (e_curr = *edgec)->e_next; edgec = &(*edgec)->e_next) {
-                /* if the current edge hits scan line at greater X than the next edge, we need to exchange the edges */
-                if(e_curr->x > e_curr->e_next->x) {
-                    *edgec = e_curr->e_next;
-                    /* exchange the pointers */
-                    e_temp = e_curr->e_next->e_next;
-                    e_curr->e_next->e_next = e_curr;
-                    e_curr->e_next = e_temp;
-                    /* set flag that we had at least one switch */
-                    swixd = 1;
-                }
-            }
-            /* if we did have a switch, look for more (there will more if there was one) */
-            for(;;) {
-                /* reset exchange flag so it's only set if we encounter another one */
-                swixd = 0;
-                for(edgec = &ctx->possible_edges; (e_curr = *edgec)->e_next; edgec = &(*edgec)->e_next) {
-                    /* again, if current edge hits scan line at higher X than next edge,
-                     * exchange the edges and set flag */
-                    if(e_curr->x > e_curr->e_next->x) {
-                        *edgec = e_curr->e_next;
-                        /* exchange the pointers */
-                        e_temp = e_curr->e_next->e_next;
-                        e_curr->e_next->e_next = e_curr;
-                        e_curr->e_next = e_temp;
-                        /* flip the exchanged flag */
-                        swixd = 1;
-                    }
-                }
-                /* if we had no exchanges, we're done reshuffling the pointers */
-                if(!swixd) {
-                    break;
-                }
-            }
-        }
-    }
-
-    free(edgbuf);
-    return 1;
-}
-
-int PLX_raskterize_feather(float(*base_verts)[2], int num_base_verts, float(*feather_verts)[2], int num_feather_verts,
-                           float *buf, int buf_x, int buf_y) {
-    //void plx_floatsort(float(*f)[2], unsigned int n, int sortby);
-    int i;                            /* i: Loop counter. */
-    struct poly_vert *fe;             /* fe: Pointer to a list of integer buffer-space feather vertex coords. */
-    struct r_fill_context ctx = {0};
-
-    /* for faster multiply */
-    const float buf_x_f = (float)buf_x;
-    const float buf_y_f = (float)buf_y;
-#ifdef __PLX_KD_TREE__
-    ctx.kdi = kd_create(2);
-    ctx.kdo = kd_create(2);
-#endif
-    /*
-     * Allocate enough memory for our poly_vert list. It'll be the size of the poly_vert
-     * data structure multiplied by the number of verts.
-     *
-     * In the event of a failure to allocate the memory, return 0, so this error can
-     * be distinguished as a memory allocation error.
-     */
-    if((fe = (struct poly_vert *)(malloc(sizeof(struct poly_vert) * num_feather_verts))) == NULL) {
-        return(0);
-    }
-
-    /*
-     * Loop over all verts passed in to be rasterized. Each vertex's X and Y coordinates are
-     * then converted from normalized screen space (0.0 <= POS <= 1.0) to integer coordinates
-     * in the buffer-space coordinates passed in inside buf_x and buf_y.
-     *
-     * It's worth noting that this function ONLY outputs fully white pixels in a mask. Every pixel
-     * drawn will be 1.0f in value, there is no anti-aliasing.
-     */
-    for(i = 0; i < num_feather_verts; i++) {             /* Loop over all verts. */
-        fe[i].x = (int)((feather_verts[i][0] * buf_x_f) + 0.5f);  /* Range expand normalized X to integer buffer-space X. */
-        fe[i].y = (int)((feather_verts[i][1] * buf_y_f) + 0.5f);  /* Range expand normalized Y to integer buffer-space Y. */
-#ifdef __PLX_KD_TREE__
-        kd_insertf(ctx.kdo,feather_verts[i],NULL);
-    }
-    for(i=0;i<num_base_verts;i++){
-        kd_insertf(ctx.kdi,base_verts[i],NULL);
-#endif
-    }
-
-    ctx.rb.buf = buf;                            /* Set the output buffer pointer. */
-    ctx.rb.sizex = buf_x;                        /* Set the output buffer size in X. (width) */
-    ctx.rb.sizey = buf_y;                        /* Set the output buffer size in Y. (height) */
-    /* pre-sort the sets of edge verts on y */
-    //plx_floatsort(base_verts,num_base_verts,0);
-    //plx_floatsort(base_verts,num_base_verts,1);
-    //plx_floatsort(feather_verts,num_feather_verts,0);
-    //plx_floatsort(feather_verts,num_feather_verts,1);
-    /* Call our rasterizer, passing in the integer coords for each vert. */
-    i = rast_scan_feather(&ctx, base_verts, num_base_verts, fe, feather_verts, num_feather_verts);
-    free(fe);
-    return i;                                   /* Return the value returned by the rasterizer. */
-}
-
-#ifndef __PLX__FAKE_AA__
-
-static int get_range_expanded_pixel_coord(float normalized_value, int max_value) {
-    return (int)((normalized_value * (float)(max_value)) + 0.5f);
-}
-
-DO_INLINE float get_pixel_intensity(float *buf, int buf_x, int buf_y, int pos_x, int pos_y) {
-    if(pos_x < 0 || pos_x >= buf_x || pos_y < 0 || pos_y >= buf_y) {
-        return 0.0f;
-    }
-    return buf[(pos_y * buf_x) + pos_x];
-}
-
-DO_INLINE float get_pixel_intensity_bilinear(float *buf, int buf_x, int buf_y, float u, float v) {
-    int a;
-    int b;
-    int a_plus_1;
-    int b_plus_1;
-    float prop_u;
-    float prop_v;
-    float inv_prop_u;
-    float inv_prop_v;
-    if(u<0.0f || u>1.0f || v<0.0f || v>1.0f) {
-        return 0.0f;
-    }
-    u = u * (float)(buf_x) - 0.5f;
-    v = v * (float)(buf_y) - 0.5f;
-    a = (int)(u);
-    b = (int)(v);
-    prop_u = u - (float)(a);
-    prop_v = v - (float)(b);
-    inv_prop_u = 1.0f - prop_u;
-    inv_prop_v = 1.0f - prop_v;
-    a_plus_1 = MIN2((buf_x-1),a+1);
-    b_plus_1 = MIN2((buf_y-1),b+1);
-    return (buf[(b * buf_x) + a] * inv_prop_u + buf[(b*buf_x)+(a_plus_1)] * prop_u)*inv_prop_v+(buf[((b_plus_1) * buf_x)+a] * inv_prop_u + buf[((b_plus_1)*buf_x)+(a_plus_1)] * prop_u) * prop_v;
-
-}
-
-DO_INLINE void set_pixel_intensity(float *buf, int buf_x, int buf_y, int pos_x, int pos_y, float intensity) {
-    if(pos_x < 0 || pos_x >= buf_x || pos_y < 0 || pos_y >= buf_y) {
-        return;
-    }
-    buf[(pos_y * buf_x) + pos_x] = intensity;
-}
-#endif
-
-int PLX_antialias_buffer(float *buf, int buf_x, int buf_y) {
-#ifdef __PLX__FAKE_AA__
-#ifdef __PLX_GREY_AA__
-    int i=0;
-    int sz = buf_x * buf_y;
-    for(i=0; i<sz; i++) {
-        buf[i] *= 0.5f;
-    }
-#endif
-    (void)buf_x;
-    (void)buf_y;
-    (void)buf;
-    return 1;
-#else
-    const float jump01 = 1.0f;
-    const float jump02 = 1.0f;
-    const float jump03 = 1.0f;
-    const float jump04 = 1.0f;
-    const float jump05 = 1.0f;
-    const float jump06 = 1.5f;
-    const float jump07 = 2.0f;
-    const float jump08 = 2.0f;
-    const float jump09 = 2.0f;
-    const float jump10 = 2.0f;
-    const float jump11 = 4.0f;
-    const float jump12 = 8.0f;
-
-    const float edge_threshold = 0.063f;
-    const float edge_threshold_min = 0.0312f;
-    const float quality_subpix = 1.0f;
-
-    float fpcx,fpcy;
-    float fpsqx,fpsqy;
-    float fprevx,fprevy;
-    float fpfowx,fpfowy;
-    float offset_dgx,offset_dgy;
-    float pci;
-    float pdi;
-    float pri;
-    float pui;
-    float pli;
-    float uli;
-    float dri;
-    float uri;
-    float dli;
-    float udi;
-    float lri;
-    float fsi;
-    float ti;
-    float cdi;
-    float bi;
-    float uui;
-    float ddi;
-    float eri;
-    float efi;
-    float cci;
-    float ltz;
-    float spX;
-    float inv_r;
-    float spP;
-    float gdc;
-    float sdc;
-    float gedc;
-    float sedc;
-    float glu;
-    float slu;
-    float gr;
-    float sr;
-    float grexp;
-    float r;
-    float grc;
-    float lre;
-    float ude;
-    float lre0;
-    float ude0;
-    float lre1;
-    float ude1;
-    float lre2;
-    float ude2;
-    float lre3;
-    float ude3;
-    float sdst;
-    float tg0;
-    float tg1;
-    float tg2;
-    float tg3;
-    float tg4;
-    float tg5;
-    float tg6;
-    float tg7;
-    float ugrad;
-    float dgrad;
-    float grad;
-    float gradexp;
-    float revdst;
-    float fowdst;
-    float dst;
-    float dsts;
-    float inv_dsts;
-    float pxOff;
-    float gpxOff;
-    float tgpxOff;
-    float opx;
-    float opy;
-    int uls;
-    int sph;
-    int revsph;
-    int fowsph;
-    int lrsp;
-    int done;
-    int revpp;
-    int revdone;
-    int fowdone;
-    int tug_of_war;
-    int curr_x=0;
-    int curr_y=0;
-    opx = (1.0f / (float)(buf_x));
-    opy = (1.0f / (float)(buf_y));
-    for(curr_y=0; curr_y < buf_y; curr_y++) {
-        for(curr_x=0; curr_x < buf_x; curr_x++) {
-            fpcx = ((float)(curr_x) + 0.5f) * opx;
-            fpcy = ((float)(curr_y) + 0.5f) * opy;
-//#define __PLX_BILINEAR_INITIAL_SAMPLES__ 1
-#ifdef __PLX_BILINEAR_INITIAL_SAMPLES__
-            lumaM = get_pixel_intensity_bilinear(buf, buf_x, buf_y, posM_x, posM_y);
-            lumaS = get_pixel_intensity_bilinear(buf, buf_x, buf_y, posM_x, posM_y + opy);
-            lumaE = get_pixel_intensity_bilinear(buf, buf_x, buf_y, posM_x + opx, posM_y);
-            lumaN = get_pixel_intensity_bilinear(buf, buf_x, buf_y, posM_x, posM_y - opy);
-            lumaW = get_pixel_intensity_bilinear(buf, buf_x, buf_y, posM_x - opx, posM_y);
-#else
-    pci = get_pixel_intensity(buf, buf_x, buf_y, curr_x, curr_y);
-    pdi = get_pixel_intensity(buf, buf_x, buf_y, curr_x, curr_y + 1);
-    pri = get_pixel_intensity(buf, buf_x, buf_y, curr_x + 1, curr_y);
-    pui = get_pixel_intensity(buf, buf_x, buf_y, curr_x, curr_y - 1);
-    pli = get_pixel_intensity(buf, buf_x, buf_y, curr_x - 1, curr_y);
-#endif
-            gdc = MAX2(pdi, pci);
-            sdc = MIN2(pdi, pci);
-            gedc = MAX2(pri, gdc);
-            sedc = MIN2(pri, sdc);
-            glu = MAX2(pui, pli);
-            slu = MIN2(pui, pli);
-            gr = MAX2(glu, gedc);
-            sr = MIN2(slu, sedc);
-            grexp = gr * edge_threshold;
-            r = gr - sr;
-            grc = MAX2(edge_threshold_min, grexp);
-
-            done = r < grc ? 1:0;
-            if(done) {
-                set_pixel_intensity(buf, buf_x, buf_y, curr_x, curr_y, pci);
-            } else {
-
-                uli = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpcx - opx, fpcy - opy);
-                dri = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpcx + opx, fpcy + opy);
-                uri = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpcx + opx, fpcy - opy);
-                dli = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpcx - opx, fpcy + opy);
-
-                udi = pui + pdi;
-                lri = pli + pri;
-                inv_r = 1.0f/r;
-                spP = udi + lri;
-                lre0 = (-2.0f * pci) + udi;
-                ude0 = (-2.0f * pci) + lri;
-
-                fsi = uri + dri;
-                ti = uli + uri;
-                lre1 = (-2.0f * pri) + fsi;
-                ude1 = (-2.0f * pui) + ti;
-
-                cdi = uli + dli;
-                bi = dli + dri;
-                lre3 = (ABS(lre0) * 2.0f) + ABS(lre1);
-                ude3 = (ABS(ude0) * 2.0f) + ABS(ude1);
-                lre2 = (-2.0f * pli) + cdi;
-                ude2 = (-2.0f * pdi) + bi;
-                lre = ABS(lre2) + lre3;
-                ude = ABS(ude2) + ude3;
-
-                spX = cdi + fsi;
-                sdst = 1.0f / (float)(buf_x);
-                lrsp = lre >= ude ? 1:0;
-                tg0 = spP * 2.0f + spX;
-
-                if(!lrsp) {
-                    pui = pli;
-                    pdi = pri;
-                } else {
-                    sdst = 1.0f / (float)(buf_y);
-                }
-                tg1 = (tg0 * (1.0f/12.0f)) - pci;
-
-                ugrad = pui - pci;
-                dgrad = pdi - pci;
-                uui = pui + pci;
-                ddi = pdi + pci;
-                revpp = (ABS(ugrad)) >= (ABS(dgrad)) ? 1:0;
-                grad = MAX2(ABS(ugrad), ABS(dgrad));
-                if(revpp) {
-                    sdst = -sdst;
-                }
-                tg2 = MAX2(MIN2(ABS(tg1) * inv_r,1.0f),0.0f);
-
-                fpsqx = fpcx;
-                fpsqy = fpcy;
-                offset_dgx = (!lrsp) ? 0.0f:(1.0f / (float)(buf_x));
-                offset_dgy = (lrsp) ? 0.0f:(1.0f / (float)(buf_y));
-                if(!lrsp) {
-                    fpsqx += sdst * 0.5f;
-                } else {
-                    fpsqy += sdst * 0.5f;
-                }
-
-                fprevx = fpsqx - offset_dgx * jump01;
-                fprevy = fpsqy - offset_dgy * jump01;
-                fpfowx = fpsqx + offset_dgx * jump01;
-                fpfowy = fpsqy + offset_dgy * jump01;
-                tg3 = ((-2.0f)*tg2) + 3.0f;
-                eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                tg4 = tg2 * tg2;
-                efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-
-                if(!revpp) {
-                    uui = ddi;
-                }
-                gradexp = grad * 1.0f/4.0f;
-                cci =pci - uui * 0.5f;
-                tg5 = tg3 * tg4;
-                ltz = cci < 0.0f ? 1:0;
-
-                eri -= uui * 0.5f;
-                efi -= uui * 0.5f;
-                revdone = (ABS(eri)) >= gradexp ? 1:0;
-                fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                if(!revdone) {
-                    fprevx -= offset_dgx * jump02;
-                    fprevy -= offset_dgy * jump02;
-                }
-                tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                if(!fowdone) {
-                    fpfowx += offset_dgx * jump02;
-                    fpfowy += offset_dgy * jump02;
-                }
-
-                if(tug_of_war) {
-                    if(!revdone) {
-                        eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fprevx,fprevy);
-                    }
-                    if(!fowdone) {
-                        efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx, fpfowy);
-                    }
-                    if(!revdone) {
-                        eri = eri - uui * 0.5;
-                    }
-                    if(!fowdone) {
-                        efi = efi - uui * 0.5;
-                    }
-                    revdone = (ABS(eri)) >= gradexp ? 1:0;
-                    fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                    if(!revdone) {
-                        fprevx -= offset_dgx * jump03;
-                        fprevy -= offset_dgy * jump03;
-                    }
-                    tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                    if(!fowdone) {
-                        fpfowx += offset_dgx * jump03;
-                        fpfowy += offset_dgy * jump03;
-                    }
-                    if(tug_of_war) {
-                        if(!revdone) {
-                            eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                        }
-                        if(!fowdone) {
-                            efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                        }
-                        if(!revdone) {
-                            eri = eri - uui * 0.5;
-                        }
-                        if(!fowdone) {
-                            efi = efi - uui * 0.5;
-                        }
-                        revdone = (ABS(eri)) >= gradexp ? 1:0;
-                        fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                        if(!revdone) {
-                            fprevx -= offset_dgx * jump04;
-                            fprevy -= offset_dgy * jump04;
-                        }
-                        tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                        if(!fowdone) {
-                            fpfowx += offset_dgx * jump04;
-                            fpfowy += offset_dgy * jump04;
-                        }
-                        if(tug_of_war) {
-                            if(!revdone) {
-                                eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                            }
-                            if(!fowdone) {
-                                efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                            }
-                            if(!revdone) {
-                                eri = eri - uui * 0.5;
-                            }
-                            if(!fowdone) {
-                                efi = efi - uui * 0.5;
-                            }
-                            revdone = (ABS(eri)) >= gradexp ? 1:0;
-                            fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                            if(!revdone) {
-                                fprevx -= offset_dgx * jump05;
-                                fprevy -= offset_dgy * jump05;
-                            }
-                            tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                            if(!fowdone) {
-                                fpfowx += offset_dgx * jump05;
-                                fpfowy += offset_dgy * jump05;
-                            }
-                            if(tug_of_war) {
-                                if(!revdone) {
-                                    eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                }
-                                if(!fowdone) {
-                                    efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                }
-                                if(!revdone) {
-                                    eri = eri - uui * 0.5;
-                                }
-                                if(!fowdone) {
-                                    efi = efi - uui * 0.5;
-                                }
-                                revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                if(!revdone) {
-                                    fprevx -= offset_dgx * jump06;
-                                    fprevy -= offset_dgy * jump06;
-                                }
-                                tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                if(!fowdone) {
-                                    fpfowx += offset_dgx * jump06;
-                                    fpfowy += offset_dgy * jump06;
-                                }
-                                if(tug_of_war) {
-                                    if(!revdone) {
-                                        eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                    }
-                                    if(!fowdone) {
-                                        efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                    }
-                                    if(!revdone) {
-                                        eri = eri - uui * 0.5;
-                                    }
-                                    if(!fowdone) {
-                                        efi = efi - uui * 0.5;
-                                    }
-                                    revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                    fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                    if(!revdone) {
-                                        fprevx -= offset_dgx * jump07;
-                                        fprevy -= offset_dgy * jump07;
-                                    }
-                                    tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                    if(!fowdone) {
-                                        fpfowx += offset_dgx * jump07;
-                                        fpfowy += offset_dgy * jump07;
-                                    }
-                                    if(tug_of_war) {
-                                        if(!revdone) {
-                                            eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                        }
-                                        if(!fowdone) {
-                                            efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                        }
-                                        if(!revdone) {
-                                            eri = eri - uui * 0.5;
-                                        }
-                                        if(!fowdone) {
-                                            efi = efi - uui * 0.5;
-                                        }
-                                        revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                        fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                        if(!revdone) {
-                                            fprevx -= offset_dgx * jump08;
-                                            fprevy -= offset_dgy * jump08;
-                                        }
-                                        tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                        if(!fowdone) {
-                                            fpfowx += offset_dgx * jump08;
-                                            fpfowy += offset_dgy * jump08;
-                                        }
-                                        if(tug_of_war) {
-                                            if(!revdone) {
-                                                eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                            }
-                                            if(!fowdone) {
-                                                efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                            }
-                                            if(!revdone) {
-                                                eri = eri - uui * 0.5;
-                                            }
-                                            if(!fowdone) {
-                                                efi = efi - uui * 0.5;
-                                            }
-                                            revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                            fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                            if(!revdone) {
-                                                fprevx -= offset_dgx * jump09;
-                                                fprevy -= offset_dgy * jump09;
-                                            }
-                                            tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                            if(!fowdone) {
-                                                fpfowx += offset_dgx * jump09;
-                                                fpfowy += offset_dgy * jump09;
-                                            }
-                                            if(tug_of_war) {
-                                                if(!revdone) {
-                                                    eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                                }
-                                                if(!fowdone) {
-                                                    efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                                }
-                                                if(!revdone) {
-                                                    eri = eri - uui * 0.5;
-                                                }
-                                                if(!fowdone) {
-                                                    efi = efi - uui * 0.5;
-                                                }
-                                                revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                                fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                                if(!revdone) {
-                                                    fprevx -= offset_dgx * jump10;
-                                                    fprevy -= offset_dgy * jump10;
-                                                }
-                                                tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                                if(!fowdone) {
-                                                    fpfowx += offset_dgx * jump10;
-                                                    fpfowy += offset_dgy * jump10;
-                                                }
-                                                if(tug_of_war) {
-                                                    if(!revdone) {
-                                                        eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                                    }
-                                                    if(!fowdone) {
-                                                        efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                                    }
-                                                    if(!revdone) {
-                                                        eri = eri - uui * 0.5;
-                                                    }
-                                                    if(!fowdone) {
-                                                        efi = efi - uui * 0.5;
-                                                    }
-                                                    revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                                    fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                                    if(!revdone) {
-                                                        fprevx -= offset_dgx * jump11;
-                                                        fprevy -= offset_dgy * jump11;
-                                                    }
-                                                    tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                                    if(!fowdone) {
-                                                        fpfowx += offset_dgx * jump11;
-                                                        fpfowy += offset_dgy * jump11;
-                                                    }
-                                                    if(tug_of_war) {
-                                                        if(!revdone) {
-                                                            eri = get_pixel_intensity_bilinear(buf, buf_x, buf_y,fprevx,fprevy);
-                                                        }
-                                                        if(!fowdone) {
-                                                            efi = get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpfowx,fpfowy);
-                                                        }
-                                                        if(!revdone) {
-                                                            eri = eri - uui * 0.5;
-                                                        }
-                                                        if(!fowdone) {
-                                                            efi = efi - uui * 0.5;
-                                                        }
-                                                        revdone = (ABS(eri)) >= gradexp ? 1:0;
-                                                        fowdone = (ABS(efi)) >= gradexp ? 1:0;
-                                                        if(!revdone) {
-                                                            fprevx -= offset_dgx * jump12;
-                                                            fprevy -= offset_dgy * jump12;
-                                                        }
-                                                        tug_of_war = (!revdone) || (!fowdone) ? 1:0;
-                                                        if(!fowdone) {
-                                                            fpfowx += offset_dgx * jump12;
-                                                            fpfowy += offset_dgy * jump12;
-                                                        }
-                                                    }
-                                                }
-                                            }
-                                        }
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                revdst = fpcx - fprevx;
-                fowdst = fpfowx - fpcx;
-                if(!lrsp) {
-                    revdst = fpcy - fprevy;
-                    fowdst = fpfowy - fpcy;
-                }
-
-                revsph = ((eri < 0.0f) ? 1:0) != ltz ? 1:0;
-                dsts = (fowdst + revdst);
-                fowsph = ((efi < 0.0f) ? 1:0) != ltz ? 1:0;
-                inv_dsts = 1.0f/dsts;
-
-                uls = revdst < fowdst ? 1:0;
-                dst = MIN2(revdst, fowdst);
-                sph = (uls==1) ? revsph:fowsph;
-                tg6 = tg5 * tg5;
-                pxOff = (dst * (-inv_dsts)) + 0.5f;
-                tg7 = tg6 * quality_subpix;
-
-                gpxOff = (sph==1) ? pxOff : 0.0f;
-                tgpxOff = MAX2(gpxOff, tg7);
-                if(!lrsp) {
-                    fpcx += tgpxOff * sdst;
-                } else {
-                    fpcy += tgpxOff * sdst;
-                }
-                set_pixel_intensity(buf,buf_x,buf_y,curr_x,curr_y,get_pixel_intensity_bilinear(buf, buf_x, buf_y, fpcx,fpcy));
-            }
-        }
-    }
-    return 1;
-
-#endif
-}
-
-#define SWAP_POLYVERT(a,b)	point_temp[0]=(a)[0]; point_temp[1]=(a)[1]; (a)[0]=(b)[0]; (a)[1]=(b)[1]; (b)[0]=point_temp[0]; (b)[1]=point_temp[1];
-#define __PLX_SMALL_COUNT__ 13
-static void plx_floatsort(float(*f)[2], unsigned int n, int sortby) {
-    unsigned int a;
-    unsigned int b;
-    unsigned int c;
-    unsigned int d=1;
-    unsigned int hold;
-    unsigned int index_list[50];
-    int index_offset=0;
-    float t[2];
-    float point_temp[2];
-
-    hold=n;
-    for(;;) {
-        if(hold-d < __PLX_SMALL_COUNT__) {
-            for(b=d+1; b<=hold; b++) {
-                t[1]=f[b][1];
-                t[0]=f[b][0];
-                for(a=b-1; a>=d; a--) {
-                    if(f[a][sortby] <= t[sortby]) {
-                        break;
-                    }
-                    f[a+1][1]=f[a][1];
-                    f[a+1][0]=f[a][0];
-                }
-                f[a+1][1]=t[1];
-                f[a+1][0]=t[0];
-            }
-            if(index_offset < 0) {
-                break;
-            }
-            hold=index_list[index_offset--];
-            d=index_list[index_offset--];
-        } else {
-            c=(d+hold) >> 1;
-            SWAP_POLYVERT(f[c],f[d+1])
-            if(f[d][sortby] > f[hold][sortby]) {
-                SWAP_POLYVERT(f[d],f[hold])
-            }
-            if(f[d+1][sortby] > f[hold][sortby]) {
-                SWAP_POLYVERT(f[d+1],f[hold])
-            }
-            if(f[d][sortby] > f[d+1][sortby]) {
-                SWAP_POLYVERT(f[d],f[d+1])
-            }
-            a=d+1;
-            b=hold;
-            t[0]=f[d+1][0];
-            t[1]=f[d+1][1];
-            for(;;) {
-                do a++;
-                while(f[a][sortby] < t[sortby]);
-                do b--;
-                while(f[b][sortby] > t[sortby]);
-                if(b < a) {
-                    break;
-                }
-                SWAP_POLYVERT(f[a],f[b])
-            }
-            f[d+1][0]=f[b][0];
-            f[d+1][1]=f[b][1];
-            f[b][0]=t[0];
-            f[b][1]=t[1];
-            index_offset+=2;
-            if(index_offset > __PLX_SMALL_COUNT__) {
-                return;
-            }
-            if(hold-a+1 >= b-d) {
-                index_list[index_offset]=hold;
-                index_list[index_offset-1]=a;
-                hold=b-1;
-            } else {
-                index_list[index_offset]=b-1;
-                index_list[index_offset-1]=d;
-                d=a;
-            }
-        }
-    }
-}
-
-static int plx_find_lower_bound(float v, float(*a)[2], int num_feather_verts) {
-    int x;
-    int l;
-    int r;
-    l=1;
-    r=num_feather_verts;
-    for(;;) {
-        // interpolation style search
-        //x=l+(v-a[l][1])*(r-l) / (a[r][1]-a[l][1]);
-
-        // binary search
-        x=(l+r) / 2;
-        if(v<a[x][1]) {
-            r=x-1;
-        } else {
-            l=x+1;
-        }
-        if((v>a[x-1][1] && v <= a[x][1]) || l>r) {
-            break;
-        }
-    }
-    if(v>a[x-1][1] && v <= a[x][1]) {
-        return x;
-    } else {
-        return num_feather_verts;
-    }
-}
-
-static int plx_find_upper_bound(float v, float(*a)[2], int num_feather_verts) {
-    int x;
-    int l;
-    int r;
-    l=1;
-    r=num_feather_verts;
-    for(;;) {
-        // interpolation style search
-        //x=l+(v-a[l][1])*(r-l) / (a[r][1]-a[l][1]);
-
-        // binary search
-        x=(l+r) / 2;
-        if(v<a[x][1]) {
-            r=x-1;
-        } else {
-            l=x+1;
-        }
-        if((v>=a[x-1][1] && v < a[x][1]) || l>r) {
-            break;
-        }
-    }
-    if(v>=a[x-1][1] && v < a[x][1]) {
-        return x-1;
-    } else {
-        return num_feather_verts;
-    }
-}
-