Added old abandoned KDE3 version of koffice

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/koffice@1077364 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 403 insertions, 0 deletions

diff --git a/karbon/render/art_render_misc.c b/karbon/render/art_render_misc.c
new file mode 100644
index 00000000..088a3984
--- /dev/null
+++ b/karbon/render/art_render_misc.c
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+/* This file is part of the KDE project.
+ * art_render_misc.c: Here I store some routines I feel should be in libart :)
+ *
+ * Copyright (C) 2002, The Karbon Developers
+ *
+ * This code is adapted from :
+ *
+ * art_render_gradient.c: Gradient image source for modular rendering.
+ *
+ * Libart_LGPL - library of basic graphic primitives
+ * Copyright (C) 2000 Raph Levien
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Authors: Raph Levien <[email protected]>
+ *          Alexander Larsson <[email protected]>
+ */
+
+#include "config.h"
+#include "art_render_misc.h"
+
+#include <math.h>
+
+typedef struct _ArtImageSourceGradLin ArtImageSourceGradLin;
+typedef struct _ArtImageSourceGradRad ArtImageSourceGradRad;
+typedef struct _ArtImageSourceGradCon ArtImageSourceGradCon;
+
+struct _ArtImageSourceGradLin {
+  ArtImageSource super;
+  const ArtGradientLinear *gradient;
+};
+
+struct _ArtImageSourceGradRad {
+  ArtImageSource super;
+  const ArtGradientRadial *gradient;
+  double a;
+};
+
+struct _ArtImageSourceGradCon {
+  ArtImageSource super;
+  const ArtGradientConical *gradient;
+};
+
+
+#define EPSILON 1e-6
+
+/**
+ * art_karbon_render_gradient_setpix: Set a gradient pixel.
+ * @render: The render object.
+ * @dst: Pointer to destination (where to store pixel).
+ * @n_stops: Number of stops in @stops.
+ * @stops: The stops for the gradient.
+ * @offset: The offset.
+ *
+ * @n_stops must be > 0.
+ *
+ * Sets a gradient pixel, storing it at @dst.
+ **/
+static void
+art_karbon_render_gradient_setpix (ArtRender *render,
+			    art_u8 *dst,
+			    int n_stops, ArtGradientStop *stops,
+			    double offset)
+{
+  int ix;
+  int j;
+  double off0, off1;
+  int n_ch = render->n_chan + 1;
+
+  for (ix = 0; ix < n_stops; ix++)
+    if (stops[ix].offset > offset)
+      break;
+  /* stops[ix - 1].offset < offset < stops[ix].offset */
+  if (ix > 0 && ix < n_stops)
+    {
+      off0 = stops[ix - 1].offset;
+      off1 = stops[ix].offset;
+      if (fabs (off1 - off0) > EPSILON)
+	{
+	  double interp;
+
+	  interp = (offset - off0) / (off1 - off0);
+	  for (j = 0; j < n_ch; j++)
+	    {
+	      int z0, z1;
+	      int z;
+	      z0 = stops[ix - 1].color[j];
+	      z1 = stops[ix].color[j];
+	      z = floor (z0 + (z1 - z0) * interp + 0.5);
+	      if (render->buf_depth == 8)
+		dst[j] = ART_PIX_8_FROM_MAX (z);
+	      else /* (render->buf_depth == 16) */
+		((art_u16 *)dst)[j] = z;
+	    }
+	  return;
+	}
+    }
+  else if (ix == n_stops)
+    ix--;
+
+  for (j = 0; j < n_ch; j++)
+    {
+      int z;
+      z = stops[ix].color[j];
+      if (render->buf_depth == 8)
+	dst[j] = ART_PIX_8_FROM_MAX (z);
+      else /* (render->buf_depth == 16) */
+	((art_u16 *)dst)[j] = z;
+    }
+}
+
+static void
+art_karbon_render_gradient_linear_done (ArtRenderCallback *self, ArtRender *render)
+{
+  art_free (self);
+}
+
+static void
+art_karbon_render_gradient_linear_render (ArtRenderCallback *self, ArtRender *render,
+				   art_u8 *dest, int y)
+{
+  ArtImageSourceGradLin *z = (ArtImageSourceGradLin *)self;
+  const ArtGradientLinear *gradient = z->gradient;
+  int pixstride = (render->n_chan + 1) * (render->depth >> 3);
+  int x;
+  int width = render->x1 - render->x0;
+  double offset, d_offset;
+  double actual_offset;
+  int n_stops = gradient->n_stops;
+  ArtGradientStop *stops = gradient->stops;
+  art_u8 *bufp = render->image_buf;
+  ArtGradientSpread spread = gradient->spread;
+
+  offset = render->x0 * gradient->a + y * gradient->b + gradient->c;
+  d_offset = gradient->a;
+
+  for (x = 0; x < width; x++)
+    {
+      if (spread == ART_GRADIENT_PAD)
+	actual_offset = offset;
+      else if (spread == ART_GRADIENT_REPEAT)
+	actual_offset = offset - floor (offset);
+      else /* (spread == ART_GRADIENT_REFLECT) */
+	{
+	  double tmp;
+
+	  tmp = offset - 2 * floor (0.5 * offset);
+	  actual_offset = tmp > 1 ? 2 - tmp : tmp;
+	}
+      art_karbon_render_gradient_setpix (render, bufp, n_stops, stops, actual_offset);
+      offset += d_offset;
+      bufp += pixstride;
+    }
+}
+
+static void
+art_karbon_render_gradient_linear_negotiate (ArtImageSource *self, ArtRender *render,
+				      ArtImageSourceFlags *p_flags,
+				      int *p_buf_depth, ArtAlphaType *p_alpha)
+{
+  self->super.render = art_karbon_render_gradient_linear_render;
+  *p_flags = 0;
+  *p_buf_depth = render->depth;
+  *p_alpha = ART_ALPHA_PREMUL;
+}
+
+/**
+ * art_karbon_render_gradient_linear: Add a linear gradient image source.
+ * @render: The render object.
+ * @gradient: The linear gradient.
+ *
+ * Adds the linear gradient @gradient as the image source for rendering
+ * in the render object @render.
+ **/
+void
+art_karbon_render_gradient_linear (ArtRender *render,
+			    const ArtGradientLinear *gradient,
+			    ArtFilterLevel level)
+{
+  ArtImageSourceGradLin *image_source = art_new (ArtImageSourceGradLin, 1);
+
+  image_source->super.super.render = NULL;
+  image_source->super.super.done = art_karbon_render_gradient_linear_done;
+  image_source->super.negotiate = art_karbon_render_gradient_linear_negotiate;
+
+  image_source->gradient = gradient;
+
+  art_render_add_image_source (render, &image_source->super);
+}
+
+static void
+art_karbon_render_gradient_radial_done (ArtRenderCallback *self, ArtRender *render)
+{
+  art_free (self);
+}
+
+static void
+art_karbon_render_gradient_radial_render (ArtRenderCallback *self, ArtRender *render,
+				   art_u8 *dest, int y)
+{
+  ArtImageSourceGradRad *z = (ArtImageSourceGradRad *)self;
+  const ArtGradientRadial *gradient = z->gradient;
+  int pixstride = (render->n_chan + 1) * (render->depth >> 3);
+  int x;
+  int x0 = render->x0;
+  int width = render->x1 - x0;
+  int n_stops = gradient->n_stops;
+  ArtGradientStop *stops = gradient->stops;
+  art_u8 *bufp = render->image_buf;
+  double fx = gradient->fx;
+  double fy = gradient->fy;
+  double dx, dy;
+  double *affine = gradient->affine;
+  double aff0 = affine[0];
+  double aff1 = affine[1];
+  const double a = z->a;
+  const double arecip = 1.0 / a;
+  double b, db;
+  double c, dc, ddc;
+  double b_a, db_a;
+  double rad, drad, ddrad;
+  ArtGradientSpread spread = gradient->spread;
+
+  dx = x0 * aff0 + y * affine[2] + affine[4] - fx;
+  dy = x0 * aff1 + y * affine[3] + affine[5] - fy;
+  b = dx * fx + dy * fy;
+  db = aff0 * fx + aff1 * fy;
+  c = dx * dx + dy * dy;
+  dc = 2 * aff0 * dx + aff0 * aff0 + 2 * aff1 * dy + aff1 * aff1;
+  ddc = 2 * aff0 * aff0 + 2 * aff1 * aff1;
+
+  b_a = b * arecip;
+  db_a = db * arecip;
+
+  rad = b_a * b_a + c * arecip;
+  drad = 2 * b_a * db_a + db_a * db_a + dc * arecip;
+  ddrad = 2 * db_a * db_a + ddc * arecip;
+
+  for (x = 0; x < width; x++)
+    {
+      double z;
+
+      if (rad > 0)
+	z = b_a + sqrt (rad);
+      else
+	z = b_a;
+
+    if (spread == ART_GRADIENT_REPEAT)
+	  z = z - floor (z);
+    else if (spread == ART_GRADIENT_REFLECT)
+    {
+	  double tmp;
+
+	  tmp = z - 2 * floor (0.5 * z);
+	  z = tmp > 1 ? 2 - tmp : tmp;
+    }
+
+      art_karbon_render_gradient_setpix (render, bufp, n_stops, stops, z);
+      bufp += pixstride;
+      b_a += db_a;
+      rad += drad;
+      drad += ddrad;
+    }
+}
+
+static void
+art_karbon_render_gradient_radial_negotiate (ArtImageSource *self, ArtRender *render,
+				      ArtImageSourceFlags *p_flags,
+				      int *p_buf_depth, ArtAlphaType *p_alpha)
+{
+  self->super.render = art_karbon_render_gradient_radial_render;
+  *p_flags = 0;
+  *p_buf_depth = render->depth;
+  *p_alpha = ART_ALPHA_PREMUL;
+}
+
+/**
+ * art_karbon_render_gradient_radial: Add a radial gradient image source.
+ * @render: The render object.
+ * @gradient: The radial gradient.
+ *
+ * Adds the radial gradient @gradient as the image source for rendering
+ * in the render object @render.
+ **/
+void
+art_karbon_render_gradient_radial (ArtRender *render,
+			    const ArtGradientRadial *gradient,
+			    ArtFilterLevel level)
+{
+  ArtImageSourceGradRad *image_source = art_new (ArtImageSourceGradRad, 1);
+  double fx = gradient->fx;
+  double fy = gradient->fy;
+
+  image_source->super.super.render = NULL;
+  image_source->super.super.done = art_karbon_render_gradient_radial_done;
+  image_source->super.negotiate = art_karbon_render_gradient_radial_negotiate;
+
+  image_source->gradient = gradient;
+  /* todo: sanitycheck fx, fy? */
+  image_source->a = 1 - fx * fx - fy * fy;
+
+  art_render_add_image_source (render, &image_source->super);
+}
+
+/* Conical */
+
+static void
+art_render_gradient_conical_done (ArtRenderCallback *self, ArtRender *render)
+{
+  art_free (self);
+}
+
+static void
+art_render_gradient_conical_render (ArtRenderCallback *self, ArtRender *render,
+				   art_u8 *dest, int y)
+{
+  ArtImageSourceGradCon *z = (ArtImageSourceGradCon *)self;
+  const ArtGradientConical *gradient = z->gradient;
+  int pixstride = (render->n_chan + 1) * (render->depth >> 3);
+  int x;
+  int x0 = render->x0;
+  int width = render->x1 - x0;
+  int n_stops = gradient->n_stops;
+  ArtGradientStop *stops = gradient->stops;
+  art_u8 *bufp = render->image_buf;
+  double cx = gradient->cx;
+  double cy = gradient->cy;
+  double r = gradient->r;
+  double dx, dy;
+  ArtGradientSpread spread = gradient->spread;
+
+  dy = fabs(y) - fabs(cy);
+
+  for (x = 0; x < width; x++)
+    {
+      double z;
+  	dx = fabs(x0 + x) - fabs(cx);
+
+	z = (fabs(dx) + fabs(dy)) / (r);
+
+    if (spread == ART_GRADIENT_REPEAT)
+	  z = z - floor (z);
+    else if (spread == ART_GRADIENT_REFLECT)
+    {
+	  double tmp;
+
+	  tmp = z - 2 * floor (0.5 * z);
+	  z = tmp > 1 ? 2 - tmp : tmp;
+    }
+
+      art_karbon_render_gradient_setpix (render, bufp, n_stops, stops, z);
+      bufp += pixstride;
+    }
+}
+
+static void
+art_render_gradient_conical_negotiate (ArtImageSource *self, ArtRender *render,
+				      ArtImageSourceFlags *p_flags,
+				      int *p_buf_depth, ArtAlphaType *p_alpha)
+{
+  self->super.render = art_render_gradient_conical_render;
+  *p_flags = 0;
+  *p_buf_depth = render->depth;
+  *p_alpha = ART_ALPHA_PREMUL;
+}
+
+/**
+ * art_render_gradient_radial: Add a radial gradient image source.
+ * @render: The render object.
+ * @gradient: The radial gradient.
+ *
+ * Adds the radial gradient @gradient as the image source for rendering
+ * in the render object @render.
+ **/
+void
+art_karbon_render_gradient_conical (ArtRender *render,
+			    const ArtGradientConical *gradient,
+			    ArtFilterLevel level)
+{
+  ArtImageSourceGradCon *image_source = art_new (ArtImageSourceGradCon, 1);
+
+  image_source->super.super.render = NULL;
+  image_source->super.super.done = art_render_gradient_conical_done;
+  image_source->super.negotiate = art_render_gradient_conical_negotiate;
+
+  image_source->gradient = gradient;
+
+  art_render_add_image_source (render, &image_source->super);
+}
+