diff options
Diffstat (limited to 'backend/impress/impress-document.c')
| -rw-r--r-- | backend/impress/impress-document.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/backend/impress/impress-document.c b/backend/impress/impress-document.c new file mode 100644 index 00000000..5254a881 --- /dev/null +++ b/backend/impress/impress-document.c @@ -0,0 +1,548 @@ +/* -*- 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 + */ |