inicial

1 files changed, 548 insertions, 0 deletions

diff --git a/backend/impress/impress-document.c b/backend/impress/impress-document.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/*
+ * Copyright (C) 2005, Jonathan Blandford <[email protected]>
+ * Copyright (C) 2005, Bastien Nocera <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <glib/gi18n-lib.h>
+#include <gtk/gtk.h>
+
+#include "imposter.h"
+#include "impress-document.h"
+
+#include "ev-document-misc.h"
+#include "ev-document-thumbnails.h"
+
+struct _ImpressDocumentClass
+{
+  EvDocumentClass parent_class;
+};
+
+struct _ImpressDocument
+{
+  EvDocument parent_instance;
+
+  ImpDoc *imp;
+  ImpRenderCtx *ctx;
+
+  GMutex *mutex;
+  GdkPixmap *pixmap;
+  GdkGC *gc;
+  PangoContext *pango_ctx;
+
+  /* Only used while rendering inside the mainloop */
+  int pagenum;
+  GdkPixbuf *pixbuf;
+  GCond *cond;
+};
+
+#define PAGE_WIDTH 1024
+#define PAGE_HEIGHT 768
+
+typedef struct _ImpressDocumentClass ImpressDocumentClass;
+
+static void impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
+
+EV_BACKEND_REGISTER_WITH_CODE (ImpressDocument, impress_document,
+		         {
+			   EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
+							   impress_document_document_thumbnails_iface_init);
+			 });
+
+/* Renderer */
+static void
+imp_render_draw_bezier_real (GdkDrawable *d, GdkGC *gc, int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)
+{
+  int x, y, nx, ny;
+  int ax, bx, cx, ay, by, cy;
+  double t, t2, t3;
+
+  x = x0;
+  y = y0;
+
+  cx = 3 * (x1 - x0);
+  bx = 3 * (x2 - x1) - cx;
+  ax = x3 - x0 - cx - bx;
+  cy = 3 * (y1 - y0);
+  by = 3 * (y2 - y1) - cy;
+  ay = y3 - y0 - cy - by;
+
+  for (t = 0; t < 1; t += 0.01) {
+    t2 = t * t;
+    t3 = t2 * t;
+    nx = ax * t3 + bx * t2 + cx * t + x0;
+    ny = ay * t3 + by * t2 + cy * t + y0;
+    gdk_draw_line (d, gc, x, y, nx, ny);
+    x = nx;
+    y = ny;
+  }
+}
+
+static void
+imp_render_get_size(void *drw_data, int *w, int *h)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+	#if GTK_CHECK_VERSION(3, 0, 0)
+		*w = gdk_window_get_width(impress_document->pixmap);
+		*h = gdk_window_get_height(impress_document->pixmap);
+	#else
+		gdk_drawable_get_size(impress_document->pixmap, w, h);
+	#endif
+}
+
+static void
+imp_render_set_fg_color(void *drw_data, ImpColor *color)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+  GdkColor c;
+
+  c.red = color->red;
+  c.green = color->green;
+  c.blue = color->blue;
+  gdk_gc_set_rgb_fg_color(impress_document->gc, &c);
+}
+
+static void
+imp_render_draw_line(void *drw_data, int x1, int y1, int x2, int y2)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+  gdk_draw_line(impress_document->pixmap, impress_document->gc, x1, y1, x2, y2);
+}
+
+static void
+imp_render_draw_rect(void *drw_data, int fill, int x, int y, int w, int h)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+  gdk_draw_rectangle(impress_document->pixmap, impress_document->gc, fill, x, y, w, h);
+}
+
+static void
+imp_render_draw_polygon(void *drw_data, int fill, ImpPoint *pts, int nr_pts)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+  gdk_draw_polygon(impress_document->pixmap, impress_document->gc, fill, (GdkPoint *)pts, nr_pts);
+}
+
+static void
+imp_render_draw_arc(void *drw_data, int fill, int x, int y, int w, int h, int sa, int ea)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+  gdk_draw_arc(impress_document->pixmap, impress_document->gc, fill, x, y, w, h, sa * 64, ea * 64);
+}
+
+static void
+imp_render_draw_bezier(void *drw_data, int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+
+  imp_render_draw_bezier_real (impress_document->pixmap, impress_document->gc, x0, y0, x1, y1, x2, y2, x3, y3);
+}
+
+static void *
+imp_render_open_image(void *drw_data, const unsigned char *pix, size_t size)
+{
+  GdkPixbufLoader *gpl;
+  GdkPixbuf *pb;
+
+  gpl = gdk_pixbuf_loader_new();
+  gdk_pixbuf_loader_write(gpl, pix, size, NULL);
+  gdk_pixbuf_loader_close(gpl, NULL);
+  pb = gdk_pixbuf_loader_get_pixbuf(gpl);
+  return pb;
+}
+
+static void
+imp_render_get_image_size(void *drw_data, void *img_data, int *w, int *h)
+{
+  GdkPixbuf *pb = (GdkPixbuf *) img_data;
+
+  *w = gdk_pixbuf_get_width(pb);
+  *h = gdk_pixbuf_get_height(pb);
+}
+
+static void *
+imp_render_scale_image(void *drw_data, void *img_data, int w, int h)
+{
+  GdkPixbuf *pb = (GdkPixbuf *) img_data;
+
+  return gdk_pixbuf_scale_simple(pb, w, h, GDK_INTERP_BILINEAR);
+}
+
+static void
+imp_render_draw_image(void *drw_data, void *img_data, int x, int y, int w, int h)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+  GdkPixbuf *pb = (GdkPixbuf *) img_data;
+
+  gdk_draw_pixbuf(impress_document->pixmap, impress_document->gc, pb, 0, 0, x, y, w, h, GDK_RGB_DITHER_NONE, 0, 0);
+}
+
+static void
+imp_render_close_image(void *drw_data, void *img_data)
+{
+  GdkPixbuf *pb = (GdkPixbuf *) img_data;
+
+  g_object_unref(G_OBJECT(pb));
+}
+
+static char *
+imp_render_markup(const char *text, size_t len, int styles, int size)
+{
+  double scr_mm, scr_px, dpi;
+  char *esc;
+  char *ret;
+  int sz;
+
+  scr_mm = gdk_screen_get_height_mm(gdk_screen_get_default());
+  scr_px = gdk_screen_get_height(gdk_screen_get_default());
+  dpi = (scr_px / scr_mm) * 25.4;
+  sz = (int) ((double) size * 72.0 * PANGO_SCALE / dpi);
+  esc = g_markup_escape_text(text, len);
+  ret = g_strdup_printf("<span size ='%d'>%s</span>", sz, esc);
+  g_free(esc);
+  return ret;
+}
+
+static void
+imp_render_get_text_size(void *drw_data, const char *text, size_t len, int size, int styles, int *w, int *h)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+  PangoLayout *lay;
+  int pw, ph;
+  char *m;
+
+  g_return_if_fail (impress_document->pango_ctx != NULL);
+
+  lay = pango_layout_new(impress_document->pango_ctx);
+  m = imp_render_markup(text, len, styles, size);
+  pango_layout_set_markup(lay, m, strlen(m));
+  pango_layout_get_size(lay, &pw, &ph);
+  g_object_unref(lay);
+  g_free(m);
+  *w = pw / PANGO_SCALE;
+  *h = ph / PANGO_SCALE;
+}
+
+static void
+imp_render_draw_text(void *drw_data, int x, int y, const char *text, size_t len, int size, int styles)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
+  PangoLayout *lay;
+  char *m;
+
+  g_return_if_fail (impress_document->pango_ctx != NULL);
+
+  lay = pango_layout_new(impress_document->pango_ctx);
+  m = imp_render_markup(text, len, styles, size);
+  pango_layout_set_markup(lay, m, strlen(m));
+  gdk_draw_layout(impress_document->pixmap, impress_document->gc, x, y, lay);
+  g_object_unref(lay);
+  g_free(m);
+}
+
+static const ImpDrawer imp_render_functions = {
+  imp_render_get_size,
+  imp_render_set_fg_color,
+  imp_render_draw_line,
+  imp_render_draw_rect,
+  imp_render_draw_polygon,
+  imp_render_draw_arc,
+  imp_render_draw_bezier,
+  imp_render_open_image,
+  imp_render_get_image_size,
+  imp_render_scale_image,
+  imp_render_draw_image,
+  imp_render_close_image,
+  imp_render_get_text_size,
+  imp_render_draw_text
+};
+
+/* Document interface */
+static gboolean
+impress_document_load (EvDocument  *document,
+		    const char  *uri,
+		    GError     **error)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
+  gchar *filename;
+  ImpDoc *imp;
+  int err;
+
+  /* FIXME: Could we actually load uris ? */
+  filename = g_filename_from_uri (uri, NULL, error);
+  if (!filename)
+    return FALSE;
+
+  imp = imp_open (filename, &err);
+  g_free (filename);
+
+  if (!imp)
+    {
+      g_set_error_literal (error,
+                           EV_DOCUMENT_ERROR,
+                           EV_DOCUMENT_ERROR_INVALID,
+                           _("Invalid document"));
+      return FALSE;
+    }
+  impress_document->imp = imp;
+
+  return TRUE;
+}
+
+static gboolean
+impress_document_save (EvDocument  *document,
+                       const char  *uri,
+                       GError     **error)
+{
+        g_set_error_literal (error,
+                             EV_DOCUMENT_ERROR,
+                             EV_DOCUMENT_ERROR_INVALID,
+                             "Not supported");
+	return FALSE;
+}
+
+static int
+impress_document_get_n_pages (EvDocument  *document)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
+
+  g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), 0);
+  g_return_val_if_fail (impress_document->imp != NULL, 0);
+
+  return imp_nr_pages (impress_document->imp);
+}
+
+static void
+impress_document_get_page_size (EvDocument   *document,
+				EvPage       *page,
+				double       *width,
+				double       *height)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
+
+  g_return_if_fail (IMPRESS_IS_DOCUMENT (document));
+  g_return_if_fail (impress_document->imp != NULL);
+
+  //FIXME
+  *width = PAGE_WIDTH;
+  *height = PAGE_HEIGHT;
+}
+
+static gboolean
+imp_render_get_from_drawable (ImpressDocument *impress_document)
+{
+  ImpPage *page;
+
+  page = imp_get_page (impress_document->imp, impress_document->pagenum);
+
+  g_return_val_if_fail (page != NULL, FALSE);
+
+  ev_document_doc_mutex_lock ();
+  imp_context_set_page (impress_document->ctx, page);
+  imp_render (impress_document->ctx, impress_document);
+  ev_document_doc_mutex_unlock ();
+
+  impress_document->pixbuf = gdk_pixbuf_get_from_drawable (NULL,
+					 GDK_DRAWABLE (impress_document->pixmap),
+					 NULL,
+					 0, 0,
+					 0, 0,
+					 PAGE_WIDTH, PAGE_HEIGHT);
+
+  g_cond_broadcast (impress_document->cond);
+  return FALSE;
+}
+
+static GdkPixbuf *
+impress_document_render_pixbuf (EvDocument      *document,
+				EvRenderContext *rc)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
+  GdkPixbuf       *pixbuf;
+
+  g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), NULL);
+  g_return_val_if_fail (impress_document->imp != NULL, NULL);
+
+  impress_document->pagenum = rc->page->index;
+
+  g_mutex_lock (impress_document->mutex);
+  impress_document->cond = g_cond_new ();
+
+  ev_document_fc_mutex_unlock ();
+  ev_document_doc_mutex_unlock ();
+  g_idle_add ((GSourceFunc) imp_render_get_from_drawable, impress_document);
+  g_cond_wait (impress_document->cond, impress_document->mutex);
+  g_cond_free (impress_document->cond);
+  ev_document_doc_mutex_lock ();
+  ev_document_fc_mutex_lock ();
+
+  g_mutex_unlock (impress_document->mutex);
+
+  pixbuf = impress_document->pixbuf;
+  impress_document->pixbuf = NULL;
+
+  return pixbuf;
+}
+
+static cairo_surface_t *
+impress_document_render (EvDocument      *document,
+			 EvRenderContext *rc)
+{
+  GdkPixbuf *pixbuf;
+  cairo_surface_t *surface, *scaled_surface;
+
+  pixbuf = impress_document_render_pixbuf (document, rc);
+
+  /* FIXME: impress backend should be ported to cairo */
+  surface = ev_document_misc_surface_from_pixbuf (pixbuf);
+  g_object_unref (pixbuf);
+
+  scaled_surface = ev_document_misc_surface_rotate_and_scale (surface,
+							      (PAGE_WIDTH * rc->scale) + 0.5,
+							      (PAGE_HEIGHT * rc->scale) + 0.5,
+							      rc->rotation);
+  cairo_surface_destroy (surface);
+
+  return scaled_surface;
+}
+
+static void
+impress_document_finalize (GObject *object)
+{
+  ImpressDocument *impress_document = IMPRESS_DOCUMENT (object);
+
+  if (impress_document->mutex)
+    g_mutex_free (impress_document->mutex);
+
+  if (impress_document->imp)
+    imp_close (impress_document->imp);
+
+  if (impress_document->ctx)
+    imp_delete_context (impress_document->ctx);
+
+  if (impress_document->pango_ctx)
+    g_object_unref (impress_document->pango_ctx);
+
+  if (impress_document->pixmap)
+    g_object_unref (G_OBJECT (impress_document->pixmap));
+
+  if (impress_document->gc)
+    g_object_unref (impress_document->gc);
+
+  G_OBJECT_CLASS (impress_document_parent_class)->finalize (object);
+}
+
+static void
+impress_document_class_init (ImpressDocumentClass *klass)
+{
+  GObjectClass    *gobject_class = G_OBJECT_CLASS (klass);
+  EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
+
+  gobject_class->finalize = impress_document_finalize;
+
+  ev_document_class->load = impress_document_load;
+  ev_document_class->save = impress_document_save;
+  ev_document_class->get_n_pages = impress_document_get_n_pages;
+  ev_document_class->get_page_size = impress_document_get_page_size;
+  ev_document_class->render = impress_document_render;
+}
+
+static GdkPixbuf *
+impress_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
+					   EvRenderContext      *rc,
+					   gboolean              border)
+{
+  GdkPixbuf *pixbuf;
+  GdkPixbuf *scaled_pixbuf;
+
+  pixbuf = impress_document_render_pixbuf (EV_DOCUMENT (document), rc);
+  scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
+					   (PAGE_WIDTH * rc->scale),
+					   (PAGE_HEIGHT * rc->scale),
+					   GDK_INTERP_BILINEAR);
+  g_object_unref (pixbuf);
+
+  if (border)
+    {
+      GdkPixbuf *tmp_pixbuf = scaled_pixbuf;
+
+      scaled_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
+      g_object_unref (tmp_pixbuf);
+    }
+
+  return scaled_pixbuf;
+}
+
+static void
+impress_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
+					    EvRenderContext      *rc,
+					    gint                 *width,
+					    gint                 *height)
+{
+  gdouble page_width, page_height;
+
+  impress_document_get_page_size (EV_DOCUMENT (document),
+				  rc->page,
+				  &page_width, &page_height);
+
+  if (rc->rotation == 90 || rc->rotation == 270)
+    {
+      *width = (gint) (page_height * rc->scale);
+      *height = (gint) (page_width * rc->scale);
+    }
+  else
+    {
+      *width = (gint) (page_width * rc->scale);
+      *height = (gint) (page_height * rc->scale);
+    }
+}
+
+static void
+impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
+{
+  iface->get_thumbnail = impress_document_thumbnails_get_thumbnail;
+  iface->get_dimensions = impress_document_thumbnails_get_dimensions;
+}
+
+static void
+impress_document_init (ImpressDocument *impress_document)
+{
+  GdkWindow *window;
+
+  impress_document->mutex = g_mutex_new ();
+  impress_document->ctx = imp_create_context(&imp_render_functions);
+
+  window = gdk_screen_get_root_window (gdk_screen_get_default ());
+
+  impress_document->pixmap = gdk_pixmap_new (window,
+					     PAGE_WIDTH, PAGE_HEIGHT, -1);
+  impress_document->gc = gdk_gc_new (impress_document->pixmap);
+  impress_document->pango_ctx = gdk_pango_context_get_for_screen (gdk_screen_get_default ());
+}
+
+/*
+ * vim: sw=2 ts=8 cindent noai bs=2
+ */