#include "icons/icons_inline.h"
+#include <math.h>
+
/*
*-----------------------------------------------------------------------------
return NULL;
}
+/*
+ *-----------------------------------------------------------------------------
+ * misc utils
+ *-----------------------------------------------------------------------------
+ */
+
+gint util_clip_region(gint x, gint y, gint w, gint h,
+ gint clip_x, gint clip_y, gint clip_w, gint clip_h,
+ gint *rx, gint *ry, gint *rw, gint *rh)
+{
+ if (clip_x + clip_w <= x ||
+ clip_x >= x + w ||
+ clip_y + clip_h <= y ||
+ clip_y >= y + h)
+ {
+ return FALSE;
+ }
+
+ *rx = MAX(x, clip_x);
+ *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
+
+ *ry = MAX(y, clip_y);
+ *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
+
+ return TRUE;
+}
+
/*
*-----------------------------------------------------------------------------
* pixbuf rotation
/*
*-----------------------------------------------------------------------------
- * pixbuf drawing
+ * pixbuf drawing (rectangles)
*-----------------------------------------------------------------------------
*/
g_object_unref(buffer);
}
+/*
+ *-----------------------------------------------------------------------------
+ * pixbuf drawing (triangle)
+ *-----------------------------------------------------------------------------
+ */
+
+void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
+ gint *rx, gint *ry, gint *rw, gint *rh)
+{
+ gint tx, ty, tw, th;
+
+ tx = MIN(x1, x2);
+ tx = MIN(tx, x3);
+ ty = MIN(y1, y2);
+ ty = MIN(ty, y3);
+ tw = MAX(abs(x1 - x2), abs(x2 - x3));
+ tw = MAX(tw, abs(x3 - x1));
+ th = MAX(abs(y1 - y2), abs(y2 - y3));
+ th = MAX(th, abs(y3 - y1));
+
+ *rx = tx;
+ *ry = ty;
+ *rw = tw;
+ *rh = th;
+}
+
+void pixbuf_draw_triangle(GdkPixbuf *pb,
+ gint clip_x, gint clip_y, gint clip_w, gint clip_h,
+ gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
+ guint8 r, guint8 g, guint8 b, guint8 a)
+{
+ gint p_alpha;
+ gint pw, ph, prs;
+ gint rx, ry, rw, rh;
+ gint tx, ty, tw, th;
+ gint fx1, fy1;
+ gint fx2, fy2;
+ gint fw, fh;
+ guchar *p_pix;
+ guchar *pp;
+ gint p_step;
+ gdouble slope1, slope2;
+ gint slope1_x, slope1_y;
+ gint y;
+ gint t;
+ gint middle = FALSE;
+
+ if (!pb) return;
+
+ pw = gdk_pixbuf_get_width(pb);
+ ph = gdk_pixbuf_get_height(pb);
+
+ if (!util_clip_region(0, 0, pw, ph,
+ clip_x, clip_y, clip_w, clip_h,
+ &rx, &ry, &rw, &rh)) return;
+
+ util_clip_triangle(x1, y1, x2, y2, x3, y3,
+ &tx, &ty, &tw, &th);
+
+ if (!util_clip_region(rx, ry, rw, rh,
+ tx, ty, tw, th,
+ &fx1, &fy1, &fw, &fh)) return;
+ fx2 = fx1 + fw;
+ fy2 = fy1 + fh;
+
+ p_alpha = gdk_pixbuf_get_has_alpha(pb);
+ prs = gdk_pixbuf_get_rowstride(pb);
+ p_pix = gdk_pixbuf_get_pixels(pb);
+
+ p_step = (p_alpha) ? 4 : 3;
+
+ if (y1 > y2)
+ {
+ t = x1; x1 = x2; x2 = t;
+ t = y1; y1 = y2; y2 = t;
+ }
+ if (y2 > y3)
+ {
+ t = x2; x2 = x3; x3 = t;
+ t = y2; y2 = y3; y3 = t;
+ }
+ if (y1 > y2)
+ {
+ t = x1; x1 = x2; x2 = t;
+ t = y1; y1 = y2; y2 = t;
+ }
+
+ slope1 = (gdouble)(y2 - y1);
+ if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
+ slope1_x = x1;
+ slope1_y = y1;
+ slope2 = (gdouble)(y3 - y1);
+ if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
+
+ for (y = fy1; y < fy2; y++)
+ {
+ gint xa, xb;
+
+ if (!middle && y > y2)
+ {
+ slope1 = (gdouble)(y3 - y2);
+ if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
+ slope1_x = x2;
+ slope1_y = y2;
+
+ middle = TRUE;
+ }
+
+ xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
+ xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
+
+ if (xa > xb)
+ {
+ t = xa; xa = xb; xb = t;
+ }
+
+ xa = CLAMP(xa, fx1, fx2);
+ xb = CLAMP(xb, fx1, fx2);
+
+ pp = p_pix + y * prs + xa * p_step;
+
+ while (xa < xb)
+ {
+ *pp = (r * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (g * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (b * a + *pp * (256-a)) >> 8;
+ pp++;
+ if (p_alpha) pp++;
+
+ xa++;
+ }
+ }
+}
+
+/*
+ *-----------------------------------------------------------------------------
+ * pixbuf drawing (line)
+ *-----------------------------------------------------------------------------
+ */
+
+static gint util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
+ gdouble x1, gdouble y1, gdouble x2, gdouble y2,
+ gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
+{
+ gint flip = FALSE;
+ gdouble d;
+
+ if (x1 > x2)
+ {
+ gdouble t;
+
+ t = x1; x1 = x2; x2 = t;
+ t = y1; y1 = y2; y2 = t;
+ flip = TRUE;
+ }
+
+ if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
+
+ if (y1 < y2)
+ {
+ if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
+ }
+ else
+ {
+ if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
+ }
+
+#if 0
+ if (x1 >= clip_x && x2 <= clip_x + clip_w)
+ {
+ if (y1 < y2)
+ {
+ if (y1 >= clip_y && y2 <= clip_y + clip_h) return TRUE;
+ }
+ else
+ {
+ if (y2 >= clip_y && y1 <= clip_y + clip_h) return TRUE;
+ }
+ }
+#endif
+
+ d = x2 - x1;
+ if (d > 0.0)
+ {
+ gdouble slope;
+
+ slope = (y2 - y1) / d;
+ if (x1 < clip_x)
+ {
+ y1 = y1 + slope * (clip_x - x1);
+ x1 = clip_x;
+ }
+ if (x2 > clip_x + clip_w)
+ {
+ y2 = y2 + slope * (clip_x + clip_w - x2);
+ x2 = clip_x + clip_w;
+ }
+ }
+
+ if (y1 < y2)
+ {
+ if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
+ }
+ else
+ {
+ gdouble t;
+
+ if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
+
+ t = x1; x1 = x2; x2 = t;
+ t = y1; y1 = y2; y2 = t;
+ flip = !flip;
+ }
+
+ d = y2 - y1;
+ if (d > 0.0)
+ {
+ gdouble slope;
+
+ slope = (x2 - x1) / d;
+ if (y1 < clip_y)
+ {
+ x1 = x1 + slope * (clip_y - y1);
+ y1 = clip_y;
+ }
+ if (y2 > clip_y + clip_h)
+ {
+ x2 = x2 + slope * (clip_y + clip_h - y2);
+ y2 = clip_y + clip_h;
+ }
+ }
+
+ if (flip)
+ {
+ *rx1 = x2;
+ *ry1 = y2;
+ *rx2 = x1;
+ *ry2 = y1;
+ }
+ else
+ {
+ *rx1 = x1;
+ *ry1 = y1;
+ *rx2 = x2;
+ *ry2 = y2;
+ }
+
+ return TRUE;
+}
+
+void pixbuf_draw_line(GdkPixbuf *pb,
+ gint clip_x, gint clip_y, gint clip_w, gint clip_h,
+ gint x1, gint y1, gint x2, gint y2,
+ guint8 r, guint8 g, guint8 b, guint8 a)
+{
+ gint p_alpha;
+ gint pw, ph, prs;
+ gint rx, ry, rw, rh;
+ gdouble rx1, ry1, rx2, ry2;
+ guchar *p_pix;
+ guchar *pp;
+ gint p_step;
+ gdouble slope;
+ gdouble x, y;
+ gint px, py;
+ gint cx1, cy1, cx2, cy2;
+
+ if (!pb) return;
+
+ pw = gdk_pixbuf_get_width(pb);
+ ph = gdk_pixbuf_get_height(pb);
+
+ if (!util_clip_region(0, 0, pw, ph,
+ clip_x, clip_y, clip_w, clip_h,
+ &rx, &ry, &rw, &rh)) return;
+ if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
+ (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
+ &rx1, &ry1, &rx2, &ry2)) return;
+
+ cx1 = rx;
+ cy1 = ry;
+ cx2 = rx + rw;
+ cy2 = ry + rh;
+
+ p_alpha = gdk_pixbuf_get_has_alpha(pb);
+ prs = gdk_pixbuf_get_rowstride(pb);
+ p_pix = gdk_pixbuf_get_pixels(pb);
+
+ p_step = (p_alpha) ? 4 : 3;
+
+ if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
+ {
+ if (rx1 > rx2)
+ {
+ gdouble t;
+ t = rx1; rx1 = rx2; rx2 = t;
+ t = ry1; ry1 = ry2; ry2 = t;
+ }
+
+ slope = rx2 - rx1;
+ if (slope != 0.0) slope = (ry2 - ry1) / slope;
+ for (x = rx1; x < rx2; x += 1.0)
+ {
+ px = (gint)(x + 0.5);
+ py = (gint)(ry1 + (x - rx1) * slope + 0.5);
+
+ if (px >= cx1 && px < cx2 && py >= cy1 && py < cy2)
+ {
+ pp = p_pix + py * prs + px * p_step;
+ *pp = (r * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (g * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (b * a + *pp * (256-a)) >> 8;
+ }
+ }
+ }
+ else
+ {
+ if (ry1 > ry2)
+ {
+ gdouble t;
+ t = rx1; rx1 = rx2; rx2 = t;
+ t = ry1; ry1 = ry2; ry2 = t;
+ }
+
+ slope = ry2 - ry1;
+ if (slope != 0.0) slope = (rx2 - rx1) / slope;
+ for (y = ry1; y < ry2; y += 1.0)
+ {
+ px = (gint)(rx1 + (y - ry1) * slope + 0.5);
+ py = (gint)(y + 0.5);
+
+ if (px >= cx1 && px < cx2 && py >= cy1 && py < cy2)
+ {
+ pp = p_pix + py * prs + px * p_step;
+ *pp = (r * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (g * a + *pp * (256-a)) >> 8;
+ pp++;
+ *pp = (b * a + *pp * (256-a)) >> 8;
+ }
+ }
+ }
+}
+
+/*
+ *-----------------------------------------------------------------------------
+ * pixbuf drawing (fades and shadows)
+ *-----------------------------------------------------------------------------
+ */
+
+static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gint p_alpha,
+ gint s, gint vertical, gint border,
+ gint x1, gint y1, gint x2, gint y2,
+ guint8 r, guint8 g, guint8 b, guint8 a)
+{
+ guchar *pp;
+ gint p_step;
+ guint8 n = a;
+ gint i, j;
+
+ p_step = (p_alpha) ? 4 : 3;
+ for (j = y1; j < y2; j++)
+ {
+ pp = p_pix + j * prs + x1 * p_step;
+ if (!vertical) n = a - a * abs(j - s) / border;
+ for (i = x1; i < x2; i++)
+ {
+ if (vertical) n = a - a * abs(i - s) / border;
+ *pp = (r * n + *pp * (256-n)) >> 8;
+ pp++;
+ *pp = (g * n + *pp * (256-n)) >> 8;
+ pp++;
+ *pp = (b * n + *pp * (256-n)) >> 8;
+ pp++;
+ if (p_alpha) pp++;
+ }
+ }
+}
+
+static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gint p_alpha,
+ gint sx, gint sy, gint border,
+ gint x1, gint y1, gint x2, gint y2,
+ guint8 r, guint8 g, guint8 b, guint8 a)
+{
+ guchar *pp;
+ gint p_step;
+ gint i, j;
+
+ p_step = (p_alpha) ? 4 : 3;
+ for (j = y1; j < y2; j++)
+ {
+ pp = p_pix + j * prs + x1 * p_step;
+ for (i = x1; i < x2; i++)
+ {
+ guint8 n;
+ gint r;
+
+ r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
+ n = a - a * r / border;
+ *pp = (r * n + *pp * (256-n)) >> 8;
+ pp++;
+ *pp = (g * n + *pp * (256-n)) >> 8;
+ pp++;
+ *pp = (b * n + *pp * (256-n)) >> 8;
+ pp++;
+ if (p_alpha) pp++;
+ }
+ }
+}
+
+void pixbuf_draw_shadow(GdkPixbuf *pb,
+ gint clip_x, gint clip_y, gint clip_w, gint clip_h,
+ gint x, gint y, gint w, gint h, gint border,
+ guint8 r, guint8 g, guint8 b, guint8 a)
+{
+ gint p_alpha;
+ gint pw, ph, prs;
+ gint rx, ry, rw, rh;
+ gint fx, fy, fw, fh;
+ guchar *p_pix;
+
+ if (!pb) return;
+
+ pw = gdk_pixbuf_get_width(pb);
+ ph = gdk_pixbuf_get_height(pb);
+
+ if (!util_clip_region(0, 0, pw, ph,
+ clip_x, clip_y, clip_w, clip_h,
+ &rx, &ry, &rw, &rh)) return;
+
+ p_alpha = gdk_pixbuf_get_has_alpha(pb);
+ prs = gdk_pixbuf_get_rowstride(pb);
+ p_pix = gdk_pixbuf_get_pixels(pb);
+
+ if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
+ }
+
+ if (border < 1) return;
+
+ if (util_clip_region(x, y + border, border, h - border * 2,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
+ x + border, TRUE, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x + w - border, y + border, border, h - border * 2,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
+ x + w - border, TRUE, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x + border, y, w - border * 2, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
+ y + border, FALSE, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x + border, y + h - border, w - border * 2, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
+ y + h - border, FALSE, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x, y, border, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
+ x + border, y + border, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x + w - border, y, border, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
+ x + w - border, y + border, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x, y + h - border, border, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
+ x + border, y + h - border, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+ if (util_clip_region(x + w - border, y + h - border, border, border,
+ rx, ry, rw, rh,
+ &fx, &fy, &fw, &fh))
+ {
+ pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
+ x + w - border, y + h - border, border,
+ fx, fy, fx + fw, fy + fh,
+ r, g, b, a);
+ }
+}
+
+
projects / geeqie.git / blobdiff