diff options
Diffstat (limited to 'gst/smpte/paint.c')
| -rw-r--r-- | gst/smpte/paint.c | 67 |
1 files changed, 49 insertions, 18 deletions
diff --git a/gst/smpte/paint.c b/gst/smpte/paint.c index d56450da..51eecebd 100644 --- a/gst/smpte/paint.c +++ b/gst/smpte/paint.c @@ -248,32 +248,31 @@ draw_line (guint32* dest, gint stride, int x, int y, int x2, int y2, int col) void gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1, gint x2, gint y2, gint c2) + gint x0, gint y0, gint c0, + gint x1, gint y1, gint c1, + gint x2, gint y2, gint c2) { gint i; gint sign; gfloat angle, angle_s, angle_e; + angle_s = 0.0; + angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/ + (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * + sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0)))); + if (x1 == x2) { gfloat len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)); sign = SIGN (y2 - y1); - angle_s = 0.0; - angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/ - (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * - sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0)))); - for (i=y1; i != y2+sign; i+=sign) { gfloat len2 = sqrt ((x1-x0) * (x1-x0) + (i-y0) * (i-y0)); if (y1==i) angle = 0; else - angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0))/ (len1 * len2)); - - angle = angle / angle_e; + angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0))/ (len1 * len2)) / angle_e; draw_line (dest, stride, x0, y0, x1, i, @@ -285,20 +284,13 @@ gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, sign = SIGN (x2 - x1); - angle_s = 0.0; - angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/ - (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * - sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0)))); - for (i=x1; i != x2+sign; i+=sign) { gfloat len2 = sqrt ((i-x0) * (i-x0) + (y2-y0) * (y2-y0)); if (x1==i) angle = 0; else - angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) / (len1 * len2)); - - angle = angle / angle_e; + angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) / (len1 * len2)) / angle_e; draw_line (dest, stride, x0, y0, i, y1, @@ -306,3 +298,42 @@ gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, } } } + +void +gst_smpte_paint_box_clock (guint32 *dest, gint stride, + gint x0, gint y0, gint c0, + gint x1, gint y1, gint c1, + gint x2, gint y2, gint c2) +{ + gfloat angle_m; + + if (x1 == x0) { + angle_m = 2* acos (((x1-x0) * (x2-x0) + (y1-y0) * (y1-y0))/ + (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * + sqrt ((x2-x0) * (x2-x0) + (y1-y0) * (y1-y0)))) / M_PI; + + gst_smpte_paint_triangle_clock (dest, stride, + x0, y0, c0, + x1, y1, c1, + x2, y1, (c2 * angle_m + c1 * (1.0-angle_m))); + gst_smpte_paint_triangle_clock (dest, stride, + x0, y0, c0, + x2, y1, (c2 * angle_m + c1 * (1.0-angle_m)), + x2, y2, c2); + } + else if (y1 == y0) { + angle_m = 2* acos (((x1-x0) * (x1-x0) + (y1-y0) * (y2-y0))/ + (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * + sqrt ((x1-x0) * (x1-x0) + (y2-y0) * (y2-y0)))) / M_PI; + + gst_smpte_paint_triangle_clock (dest, stride, + x0, y0, c0, + x1, y1, c1, + x1, y2, (c2 * angle_m + c1 * (1.0-angle_m))); + gst_smpte_paint_triangle_clock (dest, stride, + x0, y0, c0, + x1, y2, (c2 * angle_m + c1 * (1.0-angle_m)), + x2, y2, c2); + } +} + |