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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <math.h>
#include "evas_common.h"
#include "evas_blend_private.h"
typedef struct _RGBA_Span RGBA_Span;
typedef struct _RGBA_Edge RGBA_Edge;
typedef struct _RGBA_Vertex RGBA_Vertex;
struct _RGBA_Span
{
EINA_INLIST;
int x, y, w;
};
struct _RGBA_Edge
{
double x, dx;
int i;
};
struct _RGBA_Vertex
{
double x, y;
int i;
};
#define POLY_EDGE_DEL(_i) \
{ \
int _j; \
\
for (_j = 0; (_j < num_active_edges) && (edges[_j].i != _i); _j++); \
if (_j < num_active_edges) \
{ \
num_active_edges--; \
memmove(&(edges[_j]), &(edges[_j + 1]), \
(num_active_edges - _j) * sizeof(RGBA_Edge)); \
} \
}
#define POLY_EDGE_ADD(_i, _y) \
{ \
int _j; \
float _dx; \
RGBA_Vertex *_p, *_q; \
if (_i < (n - 1)) _j = _i + 1; \
else _j = 0; \
if (point[_i].y < point[_j].y) \
{ \
_p = &(point[_i]); \
_q = &(point[_j]); \
} \
else \
{ \
_p = &(point[_j]); \
_q = &(point[_i]); \
} \
edges[num_active_edges].dx = _dx = (_q->x - _p->x) / (_q->y - _p->y); \
edges[num_active_edges].x = (_dx * ((float)_y + 0.5 - _p->y)) + _p->x; \
edges[num_active_edges].i = _i; \
num_active_edges++; \
}
EAPI void
evas_common_polygon_init(void)
{
}
EAPI RGBA_Polygon_Point *
evas_common_polygon_point_add(RGBA_Polygon_Point *points, int x, int y)
{
RGBA_Polygon_Point *pt;
pt = malloc(sizeof(RGBA_Polygon_Point));
if (!pt) return points;
pt->x = x;
pt->y = y;
points = (RGBA_Polygon_Point *)eina_inlist_append(EINA_INLIST_GET(points), EINA_INLIST_GET(pt));
return points;
}
EAPI RGBA_Polygon_Point *
evas_common_polygon_points_clear(RGBA_Polygon_Point *points)
{
if (points)
{
while (points)
{
RGBA_Polygon_Point *old_p;
old_p = points;
points = (RGBA_Polygon_Point *)eina_inlist_remove(EINA_INLIST_GET(points), EINA_INLIST_GET(points));
free(old_p);
}
}
return NULL;
}
static int
polygon_point_sorter(const void *a, const void *b)
{
RGBA_Vertex *p, *q;
p = (RGBA_Vertex *)a;
q = (RGBA_Vertex *)b;
if (p->y <= q->y) return -1;
return 1;
}
static int
polygon_edge_sorter(const void *a, const void *b)
{
RGBA_Edge *p, *q;
p = (RGBA_Edge *)a;
q = (RGBA_Edge *)b;
if (p->x <= q->x) return -1;
return 1;
}
EAPI void
evas_common_polygon_draw(RGBA_Image *dst, RGBA_Draw_Context *dc, RGBA_Polygon_Point *points, int x, int y)
{
RGBA_Gfx_Func func;
RGBA_Polygon_Point *pt;
RGBA_Vertex *point;
RGBA_Edge *edges;
Eina_Inlist *spans;
int num_active_edges;
int n;
int i, j, k;
int y0, y1, yi;
int ext_x, ext_y, ext_w, ext_h;
int *sorted_index;
#ifdef HAVE_PIXMAN
# ifdef PIXMAN_POLY
pixman_op_t op = PIXMAN_OP_SRC; // _EVAS_RENDER_COPY
if (dc->render_op == _EVAS_RENDER_BLEND)
op = PIXMAN_OP_OVER;
# endif
#endif
ext_x = 0;
ext_y = 0;
ext_w = dst->cache_entry.w;
ext_h = dst->cache_entry.h;
if (dc->clip.use)
{
if (dc->clip.x > ext_x)
{
ext_w += ext_x - dc->clip.x;
ext_x = dc->clip.x;
}
if ((ext_x + ext_w) > (dc->clip.x + dc->clip.w))
{
ext_w = (dc->clip.x + dc->clip.w) - ext_x;
}
if (dc->clip.y > ext_y)
{
ext_h += ext_y - dc->clip.y;
ext_y = dc->clip.y;
}
if ((ext_y + ext_h) > (dc->clip.y + dc->clip.h))
{
ext_h = (dc->clip.y + dc->clip.h) - ext_y;
}
}
if ((ext_w <= 0) || (ext_h <= 0)) return;
evas_common_cpu_end_opt();
n = 0; EINA_INLIST_FOREACH(points, pt) n++;
if (n < 3) return;
edges = malloc(sizeof(RGBA_Edge) * n);
if (!edges) return;
point = malloc(sizeof(RGBA_Vertex) * n);
if (!point)
{
free(edges);
return;
}
sorted_index = malloc(sizeof(int) * n);
if (!sorted_index)
{
free(edges);
free(point);
return;
}
k = 0;
EINA_INLIST_FOREACH(points, pt)
{
point[k].x = pt->x + x;
point[k].y = pt->y + y;
point[k].i = k;
k++;
}
qsort(point, n, sizeof(RGBA_Vertex), polygon_point_sorter);
for (k = 0; k < n; k++) sorted_index[k] = point[k].i;
k = 0;
EINA_INLIST_FOREACH(points, pt)
{
point[k].x = pt->x + x;
point[k].y = pt->y + y;
point[k].i = k;
k++;
}
y0 = MAX(ext_y, ceil(point[sorted_index[0]].y - 0.5));
y1 = MIN(ext_y + ext_h - 1, floor(point[sorted_index[n - 1]].y - 0.5));
k = 0;
num_active_edges = 0;
spans = NULL;
for (yi = y0; yi <= y1; yi++)
{
for (; (k < n) && (point[sorted_index[k]].y <= ((double)yi + 0.5)); k++)
{
i = sorted_index[k];
if (i > 0) j = i - 1;
else j = n - 1;
if (point[j].y <= ((double)yi - 0.5))
{
POLY_EDGE_DEL(j)
}
else if (point[j].y > ((double)yi + 0.5))
{
POLY_EDGE_ADD(j, yi)
}
if (i < (n - 1)) j = i + 1;
else j = 0;
if (point[j].y <= ((double)yi - 0.5))
{
POLY_EDGE_DEL(i)
}
else if (point[j].y > ((double)yi + 0.5))
{
POLY_EDGE_ADD(i, yi)
}
}
qsort(edges, num_active_edges, sizeof(RGBA_Edge), polygon_edge_sorter);
for (j = 0; j < num_active_edges; j += 2)
{
int x0, x1;
x0 = ceil(edges[j].x - 0.5);
if (j < (num_active_edges - 1))
x1 = floor(edges[j + 1].x - 0.5);
else
x1 = x0;
if ((x1 >= ext_x) && (x0 < (ext_x + ext_w)) && (x0 <= x1))
{
RGBA_Span *span;
if (x0 < ext_x) x0 = ext_x;
if (x1 >= (ext_x + ext_w)) x1 = ext_x + ext_w - 1;
span = malloc(sizeof(RGBA_Span));
spans = eina_inlist_append(spans, EINA_INLIST_GET(span));
span->y = yi;
span->x = x0;
span->w = (x1 - x0) + 1;
}
edges[j].x += edges[j].dx;
edges[j + 1].x += edges[j + 1].dx;
}
}
free(edges);
free(point);
free(sorted_index);
func = evas_common_gfx_func_composite_color_span_get(dc->col.col, dst, 1, dc->render_op);
if (spans)
{
RGBA_Span *span;
EINA_INLIST_FOREACH(spans, span)
{
DATA32 *ptr;
#ifdef EVAS_SLI
if (((span->y) % dc->sli.h) == dc->sli.y)
#endif
{
#ifdef HAVE_PIXMAN
# ifdef PIXMAN_POLY
if ((dst->pixman.im) && (dc->col.pixman_color_image) &&
(!dc->mask.mask))
pixman_image_composite(op, dc->col.pixman_color_image,
NULL, dst->pixman.im,
span->x, span->y, 0, 0,
span->x, span->y, span->w, 1);
else if ((dst->pixman.im) && (dc->col.pixman_color_image) &&
(dc->mask.mask))
pixman_image_composite(op, dc->col.pixman_color_image,
dc->mask.mask->pixman.im,
dst->pixman.im,
span->x, span->y, 0, 0,
span->x, span->y, span->w, 1);
else
# endif
#endif
{
ptr = dst->image.data + (span->y * (dst->cache_entry.w)) + span->x;
func(NULL, NULL, dc->col.col, ptr, span->w);
}
}
}
while (spans)
{
span = (RGBA_Span *)spans;
spans = eina_inlist_remove(spans, spans);
free(span);
}
}
}
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