New backend to support impress slides. Fixes bug #30867.

2006-07-11  Bastien Nocera <hadess@hadess.net>

	* Makefile.am:
	* backend/Makefile.am:
	* backend/ev-document-factory.c: (ev_document_factory_add_filters):
	* backend/ev-document-factory.h:
	* configure.ac:
	* impress/.cvsignore:
	* impress/Makefile.am:
	* impress/common.h:
	* impress/document.c: (_imp_load_xml), (imp_open), (imp_nr_pages),
	(imp_get_page), (imp_next_page), (imp_prev_page),
	(imp_get_page_no), (imp_get_page_name), (imp_get_xml), (imp_close):
	* impress/f_oasis.c: (render_object), (render_page),
	(get_geometry), (_imp_oasis_load):
	* impress/f_oo13.c: (render_object), (render_page), (get_geometry),
	(_imp_oo13_load):
	* impress/iksemel.c: (iks_malloc), (iks_free), (iks_set_mem_funcs),
	(iks_strdup), (iks_strcat), (iks_strcmp), (iks_strcasecmp),
	(iks_strncmp), (iks_strncasecmp), (iks_strlen), (iks_escape),
	(iks_unescape), (find_space), (iks_stack_new), (iks_stack_alloc),
	(iks_stack_strdup), (iks_stack_strcat), (iks_stack_stat),
	(iks_stack_delete), (iks_sax_new), (iks_sax_extend),
	(iks_parser_stack), (iks_user_data), (iks_nr_bytes),
	(iks_nr_lines), (stack_init), (stack_expand), (sax_core),
	(iks_parse), (iks_parser_reset), (iks_parser_delete), (iks_new),
	(iks_new_within), (iks_insert), (iks_insert_cdata),
	(iks_insert_attrib), (iks_insert_node), (iks_hide), (iks_delete),
	(iks_next), (iks_next_tag), (iks_prev), (iks_prev_tag),
	(iks_parent), (iks_root), (iks_child), (iks_first_tag),
	(iks_attrib), (iks_find), (iks_find_cdata), (iks_find_attrib),
	(iks_find_with_attrib), (iks_stack), (iks_type), (iks_name),
	(iks_cdata), (iks_cdata_size), (iks_has_children),
	(iks_has_attribs), (escape_size), (my_strcat), (escape),
	(iks_string), (iks_copy_within), (iks_copy), (tagHook),
	(cdataHook), (deleteHook), (iks_dom_new), (iks_set_size_hint),
	(iks_tree), (iks_load), (iks_save):
	* impress/iksemel.h:
	* impress/imposter.h:
	* impress/impress-document.c: (G_DEFINE_TYPE_WITH_CODE),
	(imp_render_draw_bezier_real), (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_markup),
	(imp_render_get_text_size), (imp_render_draw_text),
	(impress_document_load), (impress_document_save),
	(impress_document_get_n_pages), (impress_document_get_page_size),
	(imp_render_get_from_drawable), (impress_document_render_pixbuf),
	(impress_document_finalize), (impress_document_class_init),
	(impress_document_can_get_text), (impress_document_get_info),
	(impress_document_document_iface_init),
	(impress_document_thumbnails_get_thumbnail),
	(impress_document_thumbnails_get_dimensions),
	(impress_document_document_thumbnails_iface_init),
	(impress_document_init):
	* impress/impress-document.h:
	* impress/internal.h:
	* impress/r_back.c: (_imp_fill_back):
	* impress/r_draw.c: (_imp_draw_rect), (_imp_draw_line_end),
	(_imp_draw_image), (_imp_tile_image):
	* impress/r_geometry.c: (r_parse_color), (r_get_color), (fg_color),
	(r_get_x), (r_get_y), (r_get_angle), (r_get_viewbox), (r_polygon),
	(r_polyline):
	* impress/r_gradient.c: (poly_rotate), (r_draw_gradient_simple),
	(r_draw_gradient_complex), (r_draw_gradient):
	* impress/r_style.c: (get_style), (r_get_style), (get_style_x),
	(r_get_bullet):
	* impress/r_text.c: (add_line), (add_span), (calc_sizes),
	(calc_pos), (_imp_draw_layout), (text_span), (text_p), (text_list),
	(r_text):
	* impress/render.c: (imp_create_context), (imp_context_set_page),
	(imp_context_set_step), (imp_render), (imp_delete_context):
	* impress/render.h:
	* impress/zip.c: (zip_error), (find_cd), (get_long), (get_word),
	(list_files), (zip_open), (zip_close), (find_file), (seek_file),
	(zip_load_xml), (zip_get_size), (zip_load):
	* impress/zip.h:
	* shell/ev-utils.c:

	New backend to support impress slides. Fixes bug #30867.

1 files changed, 207 insertions, 0 deletions

diff --git a/impress/r_geometry.c b/impress/r_geometry.c
new file mode 100644
index 0000000..6662de6
--- /dev/null
+++ b/impress/r_geometry.c
@@ -0,0 +1,207 @@
+/* imposter (OO.org Impress viewer)
+** Copyright (C) 2003-2005 Gurer Ozen
+** This code is free software; you can redistribute it and/or
+** modify it under the terms of GNU General Public License.
+*/
+
+#include "common.h"
+#include "internal.h"
+#include <math.h>
+
+void
+r_parse_color(const char *color, ImpColor *ic)
+{
+	unsigned int cval;
+
+	if (1 != sscanf(color, "#%X", &cval)) return;
+
+	ic->red = (cval & 0xFF0000) >> 8;
+	ic->green = cval & 0x00FF00;
+	ic->blue = (cval & 0xFF) << 8;
+}
+
+int
+r_get_color(ImpRenderCtx *ctx, iks *node, char *name, ImpColor *ic)
+{
+	char *color;
+
+	color = r_get_style(ctx, node, name);
+	if (!color) return 0;
+	r_parse_color(color, ic);
+
+	return 1;
+}
+
+static void
+fg_color(ImpRenderCtx *ctx, void *drw_data, iks *node, char *name)
+{
+	ImpColor ic;
+
+	if (r_get_color(ctx, node, name, &ic)) {
+		ctx->drw->set_fg_color(drw_data, &ic);
+	}
+}
+
+int
+r_get_x (ImpRenderCtx *ctx, iks *node, char *name)
+{
+	char *val;
+
+	val = iks_find_attrib (node, name);
+	if (!val) return 0;
+	return atof (val) * ctx->fact_x;
+}
+
+int
+r_get_y (ImpRenderCtx *ctx, iks *node, char *name)
+{
+	char *val;
+
+	val = iks_find_attrib (node, name);
+	if (!val) return 0;
+	return atof (val) * ctx->fact_y;
+}
+
+int
+r_get_angle (iks *node, char *name, int def)
+{
+	char *tmp;
+
+	tmp = iks_find_attrib (node, name);
+	if (!tmp) return def;
+	return atof (tmp);
+}
+
+static int x, y, w, h;
+static int px, py, pw, ph;
+
+static void
+r_get_viewbox (iks *node)
+{
+	char *tmp;
+
+	tmp = iks_find_attrib (node, "svg:viewBox");
+	if (!tmp) return;
+	sscanf (tmp, "%d %d %d %d", &px, &py, &pw, &ph);
+}
+
+void
+r_polygon(ImpRenderCtx *ctx, void *drw_data, iks *node)
+{
+	char *data;
+	ImpPoint *points;
+	int i, cnt, j;
+	int num;
+	int fill = 1;
+
+	data = r_get_style (ctx, node, "draw:fill");
+	if (!data || strcmp (data, "solid") != 0) fill = 0;
+
+	x = r_get_x (ctx, node, "svg:x");
+	y = r_get_y (ctx, node, "svg:y");
+	w = r_get_x (ctx, node, "svg:width");
+	h = r_get_y (ctx, node, "svg:height");
+	r_get_viewbox (node);
+
+	data = iks_find_attrib (node, "draw:points");
+	points = malloc (sizeof (ImpPoint) * strlen (data) / 4);
+
+	cnt = 0;
+	j = 0;
+	num = -1;
+	for (i = 0; data[i]; i++) {
+		if (data[i] >= '0' && data[i] <= '9') {
+			if (num == -1) num = i;
+		} else {
+			if (num != -1) {
+				if (j == 0) {
+					points[cnt].x = atoi (data + num);
+					j = 1;
+				} else {
+					points[cnt++].y = atoi (data + num);
+					j = 0;
+				}
+				num = -1;
+			}
+		}
+	}
+	if (num != -1) {
+		if (j == 0) {
+			points[cnt].x = atoi (data + num);
+		} else {
+			points[cnt++].y = atoi (data + num);
+		}
+	}
+	for (i = 0; i < cnt; i++) {
+		points[i].x = x + points[i].x * w / pw;
+		points[i].y = y + points[i].y * h / ph;
+	}
+
+	if (fill) {
+		fg_color(ctx, drw_data, node, "draw:fill-color");
+		ctx->drw->draw_polygon(drw_data, 1, points, cnt);
+	}
+	fg_color(ctx, drw_data, node, "svg:stroke-color");
+	ctx->drw->draw_polygon(drw_data, 0, points, cnt);
+
+	free (points);
+}
+
+void
+r_polyline(ImpRenderCtx *ctx, void *drw_data, iks *node)
+{
+	char *data;
+	ImpPoint *points;
+	int i, cnt, j;
+	int num;
+	int pen_x, pen_y;
+
+	x = r_get_x (ctx, node, "svg:x");
+	y = r_get_y (ctx, node, "svg:y");
+	w = r_get_x (ctx, node, "svg:width");
+	h = r_get_y (ctx, node, "svg:height");
+	r_get_viewbox (node);
+
+	data = iks_find_attrib (node, "draw:points");
+	points = malloc (sizeof (ImpPoint) * strlen (data) / 4);
+
+	cnt = 0;
+	j = 0;
+	num = -1;
+	for (i = 0; data[i]; i++) {
+		if (data[i] >= '0' && data[i] <= '9') {
+			if (num == -1) num = i;
+		} else {
+			if (num != -1) {
+				if (j == 0) {
+					points[cnt].x = atoi (data + num);
+					j = 1;
+				} else {
+					points[cnt++].y = atoi (data + num);
+					j = 0;
+				}
+				num = -1;
+			}
+		}
+	}
+	if (num != -1) {
+		if (j == 0) {
+			points[cnt].x = atoi (data + num);
+		} else {
+			points[cnt++].y = atoi (data + num);
+		}
+	}
+
+	pen_x = x + points[0].x * w /pw;
+	pen_y = y + points[0].y * h / ph;
+	fg_color(ctx, drw_data, node, "svg:stroke-color");
+	for (i = 1; i < cnt; i++) {
+		int tx, ty;
+		tx = x + points[i].x * w / pw;
+		ty = y + points[i].y * h / ph;
+		ctx->drw->draw_line(drw_data, pen_x, pen_y, tx, ty);
+		pen_x = tx;
+		pen_y = ty;
+	}
+	free (points);
+}