src/compositor/svg

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
compositor_svg_traverse_children
compositor_svg_is_display_off
compositor_svg_apply_local_transformation
compositor_svg_restore_parent_transformation
gf_svg_apply_inheritance_no_inheritance
compositor_svg_evaluate_conditional
compositor_svg_traverse_base
/*
 *                      GPAC - Multimedia Framework C SDK
 *
 *                      Authors: Cyril Concolato - Jean le Feuvre
 *                      Copyright (c) Telecom ParisTech 2005-2012
 *                                      All rights reserved
 *
 *  This file is part of GPAC / Scene Compositor sub-project
 *
 *  GPAC is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  GPAC 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "visual_manager.h"

#ifndef GPAC_DISABLE_SVG
#include "nodes_stacks.h"


/*
        This is the generic routine for children traversing
*/
void compositor_svg_traverse_children(GF_ChildNodeItem *children, GF_TraverseState *tr_state)
{
        while (children) {
                gf_node_traverse(children->node, tr_state);
                children = children->next;
        }
}

Bool compositor_svg_is_display_off(SVGPropertiesPointers *props)
{
        return (props->display && (*(props->display) == SVG_DISPLAY_NONE)) ? GF_TRUE : GF_FALSE;
}


void compositor_svg_apply_local_transformation(GF_TraverseState *tr_state, SVGAllAttributes *atts, GF_Matrix2D *backup_matrix_2d, GF_Matrix *backup_matrix)
{
#ifndef GPAC_DISABLE_3D
        if (tr_state->visual->type_3d && backup_matrix) {
                Bool is_draw = (tr_state->traversing_mode==TRAVERSE_SORT) ? GF_TRUE : GF_FALSE;
                gf_mx_copy(*backup_matrix, tr_state->model_matrix);

                if (atts->transform && atts->transform->is_ref) {
                        gf_mx_from_mx2d(&tr_state->model_matrix, &tr_state->vb_transform);
                        if (is_draw) {
                                gf_mx_init(tr_state->model_matrix);
                                gf_mx_add_translation(&tr_state->model_matrix, -tr_state->camera->width/2, tr_state->camera->height/2, 0);
                                gf_mx_add_scale(&tr_state->model_matrix, FIX_ONE, -FIX_ONE, FIX_ONE);
                                gf_mx_add_matrix_2d(&tr_state->model_matrix, &tr_state->vb_transform);
                        }
                }

                if (atts->motionTransform) {
                        gf_mx_add_matrix_2d(&tr_state->model_matrix, atts->motionTransform);
                }

                if (atts->transform) {
                        gf_mx_add_matrix_2d(&tr_state->model_matrix, &atts->transform->mat);
                }
                return;
        }
#endif
        gf_mx2d_copy(*backup_matrix_2d, tr_state->transform);

        if (atts->transform && atts->transform->is_ref)
                gf_mx2d_copy(tr_state->transform, tr_state->vb_transform);

        if (atts->motionTransform)
                gf_mx2d_pre_multiply(&tr_state->transform, atts->motionTransform);

        if (atts->transform)
                gf_mx2d_pre_multiply(&tr_state->transform, &atts->transform->mat);

}

void compositor_svg_restore_parent_transformation(GF_TraverseState *tr_state, GF_Matrix2D *backup_matrix_2d, GF_Matrix *backup_matrix)
{
#ifndef GPAC_DISABLE_3D
        if (tr_state->visual->type_3d && backup_matrix) {
                gf_mx_copy(tr_state->model_matrix, *backup_matrix);
                return;
        }
#endif
        gf_mx2d_copy(tr_state->transform, *backup_matrix_2d);
}

#ifdef GPAC_UNUSED_FUNC
static void gf_svg_apply_inheritance_no_inheritance(SVGAllAttributes *all_atts, SVGPropertiesPointers *render_svg_props)
{
#define CHECK_PROP(a, b) if (b) a = b;

        render_svg_props->audio_level = NULL;
        CHECK_PROP(render_svg_props->display, all_atts->display);
        CHECK_PROP(render_svg_props->fill, all_atts->fill);
        CHECK_PROP(render_svg_props->fill_opacity, all_atts->fill_opacity);
        CHECK_PROP(render_svg_props->fill_rule, all_atts->fill_rule);
        CHECK_PROP(render_svg_props->solid_color, all_atts->solid_color);
        CHECK_PROP(render_svg_props->solid_opacity, all_atts->solid_opacity);
        CHECK_PROP(render_svg_props->stop_color, all_atts->stop_color);
        CHECK_PROP(render_svg_props->stop_opacity, all_atts->stop_opacity);
        CHECK_PROP(render_svg_props->stroke, all_atts->stroke);
        CHECK_PROP(render_svg_props->stroke_dasharray, all_atts->stroke_dasharray);
        CHECK_PROP(render_svg_props->stroke_dashoffset, all_atts->stroke_dashoffset);
        CHECK_PROP(render_svg_props->stroke_linecap, all_atts->stroke_linecap);
        CHECK_PROP(render_svg_props->stroke_linejoin, all_atts->stroke_linejoin);
        CHECK_PROP(render_svg_props->stroke_miterlimit, all_atts->stroke_miterlimit);
        CHECK_PROP(render_svg_props->stroke_opacity, all_atts->stroke_opacity);
        CHECK_PROP(render_svg_props->stroke_width, all_atts->stroke_width);
        CHECK_PROP(render_svg_props->visibility, all_atts->visibility);
}
#endif /*GPAC_UNUSED_FUNC*/

static const struct svg_11_feature {
        const char *name;
        Bool supported;
} svg11_features[] =
{
        { "Animation", GF_TRUE},
        { "AnimationEventsAttribute", GF_TRUE},
        { "BasicClip", GF_FALSE},
        { "BasicFilter", GF_FALSE},
        { "BasicFont", GF_TRUE},
        { "BasicGraphicsAttribute", GF_TRUE},
        { "BasicPaintAttribute", GF_TRUE},
        { "BasicStructure", GF_TRUE},
        { "BasicText", GF_TRUE},
        { "Clip", GF_FALSE},
        { "ColorProfile", GF_FALSE},
        { "ConditionalProcessing", GF_TRUE},
        { "ContainerAttribute", GF_TRUE},
        { "CoreAttribute", GF_TRUE},
        { "Cursor", GF_FALSE},
        { "DocumentEventsAttribute", GF_TRUE},
        { "Extensibility", GF_TRUE},
        { "ExternalResourcesRequired", GF_FALSE},
        { "Font", GF_TRUE},
        { "Filter", GF_FALSE},
        { "Gradient", GF_TRUE},
        { "GraphicalEventsAttribute", GF_TRUE},
        { "GraphicsAttribute", GF_TRUE},
        { "Hyperlinking", GF_TRUE},
        { "Image", GF_TRUE},
        { "Marker", GF_FALSE},
        { "Mask", GF_FALSE},
        { "OpacityAttribute", GF_TRUE},
        { "PaintAttribute", GF_TRUE},
        { "Pattern", GF_FALSE},
        { "Script", GF_TRUE},
        { "Scripting", GF_TRUE},
        { "Shape", GF_TRUE},
        { "View", GF_FALSE},    /*no support for <view> element, the rest is OK ...*/
        { "ViewportAttribute", GF_TRUE},
        { "Structure", GF_TRUE},
        { "Style", GF_FALSE},
        { "Text", GF_TRUE},
        { "View", GF_TRUE},
        { "XlinkAttribute", GF_TRUE},

        { "SVG", GF_TRUE},
        { "SVG-animation", GF_TRUE},
        { "SVG-dynamic", GF_TRUE},
        { "SVG-static", GF_TRUE},
        /*we don't support SVG DOM, only uDOM*/
        { "SVGDOM", GF_FALSE},
        { "SVGDOM-animation", GF_FALSE},
        { "SVGDOM-dynamic", GF_FALSE},
        { "SVGDOM-static", GF_FALSE},
};
static const struct svg_12_feature {
        const char *name;
        Bool supported;
} svg12_features[] =
{
        { "CoreAttribute", GF_TRUE},
        { "NavigationAttribute", GF_TRUE},
        { "Structure", GF_TRUE},
        { "ConditionalProcessing", GF_TRUE},
        { "ConditionalProcessingAttribute", GF_TRUE},
        { "Image", GF_TRUE},
        { "Prefetch", GF_TRUE},
        { "Discard", GF_TRUE},
        { "Shape", GF_TRUE},
        { "Text", GF_TRUE},
        { "PaintAttribute", GF_TRUE},
        { "OpacityAttribute", GF_TRUE},
        { "GraphicsAttribute", GF_TRUE},
        { "Gradient", GF_TRUE},
        { "SolidColor", GF_TRUE},
        { "Hyperlinking", GF_TRUE},
        { "XlinkAttribute", GF_TRUE},
        { "ExternalResourcesRequired", GF_TRUE},
        { "Scripting", GF_TRUE},
        { "Handler", GF_TRUE},
        { "Listener", GF_TRUE},
        { "TimedAnimation", GF_TRUE},
        { "Animation", GF_TRUE},
        { "Audio", GF_TRUE},
        { "Video", GF_TRUE},
        { "Font", GF_TRUE},
        { "Extensibility", GF_TRUE},
        { "MediaAttribute", GF_TRUE},
        { "TextFlow", GF_TRUE},
        { "TransformedVideo", GF_TRUE},
        { "ComposedVideo", GF_TRUE},
        { "EditableTextAttribute", GF_TRUE},

        { "SVG-static", GF_TRUE},
        { "SVG-static-DOM", GF_TRUE},
        { "SVG-animated", GF_TRUE},
        { "SVG-all", GF_TRUE},
        { "SVG-interactive", GF_TRUE},
};


Bool compositor_svg_evaluate_conditional(GF_Compositor *compositor, SVGAllAttributes *atts)
{
        u32 i, count;
        Bool found;
        const char *lang_3cc, *lang_2cc;

        /*process required features*/
        count = atts->requiredFeatures ? gf_list_count(*atts->requiredFeatures) : 0;
        for (i=0; i<count; i++) {
                char *feat = NULL;
                XMLRI *iri = (XMLRI*)gf_list_get(*atts->requiredFeatures, i);
                if (!iri->string) continue;

                if (!strnicmp(iri->string, "org.w3c.svg", 11)) {
                        feat = iri->string+12;
                        if (feat) {
                                if (!stricmp(feat, "animation")) {}
                                else if (!stricmp(feat, "dynamic")) {}
                                /*no support for filters, clipping & co - SVG 1.0 featureStrings are badly designed*/
                                else return GF_FALSE;
                        }
                }
                else if (!strnicmp(iri->string, "http://www.w3.org/TR/SVG11/feature", 34)) {
                        feat = iri->string+35;
                        if (feat) {
                                Bool found = GF_FALSE;
                                u32 j, nbf;
                                nbf  = sizeof(svg11_features) / sizeof(struct svg_11_feature);
                                for (j=0; j<nbf; j++) {
                                        if (!strcmp(svg11_features[j].name, feat)) {
                                                found = GF_TRUE;
                                                if (!svg11_features[j].supported) return GF_FALSE;
                                                break;
                                        }
                                }
                                if (!found) return GF_FALSE;
                        }
                }
                else if (!strnicmp(iri->string, "http://www.w3.org/Graphics/SVG/feature/1.2/", 43)) {
                        feat = iri->string+44;
                        if (feat) {
                                Bool found = GF_FALSE;
                                u32 j, nbf;
                                nbf  = sizeof(svg12_features) / sizeof(struct svg_12_feature);
                                for (j=0; j<nbf; j++) {
                                        if (!strcmp(svg12_features[j].name, feat)) {
                                                found = GF_TRUE;
                                                if (!svg12_features[j].supported) return GF_FALSE;
                                                break;
                                        }
                                }
                                if (!found) return GF_FALSE;
                        }
                }
                /*unrecognized feature*/
                else {
                        return GF_FALSE;
                }
        }

        /*process required extensions*/
        count = atts->requiredExtensions ? gf_list_count(*atts->requiredExtensions) : 0;
        if (count) return GF_FALSE;

        /*process system language*/
        count = atts->systemLanguage ? gf_list_count(*atts->systemLanguage) : 0;
        if (count) {
                found = GF_FALSE;
                lang_3cc = gf_cfg_get_key(compositor->user->config, "Systems", "Language3CC");
                if (!lang_3cc) lang_3cc = "und";
                lang_2cc = gf_cfg_get_key(compositor->user->config, "Systems", "Language2CC");
                if (!lang_2cc) lang_2cc = "un";
        } else {
                lang_3cc = "und";
                lang_2cc = "un";
                found = GF_TRUE;
        }

        for (i=0; i<count; i++) {
                char *lang = (char*)gf_list_get(*atts->systemLanguage, i);
                /*3 char-code*/
                if (strlen(lang)==3) {
                        if (!stricmp(lang, lang_3cc)) {
                                found = GF_TRUE;
                                break;
                        }
                }
                /*2 char-code, only check first 2 chars - TODO FIXME*/
                else if (!strnicmp(lang, lang_2cc, 2)) {
                        found = GF_TRUE;
                        break;
                }
        }
        if (!found) return GF_FALSE;

        /*process required formats*/
        count = atts->requiredFormats ? gf_list_count(*atts->requiredFormats) : 0;
        if (count) {
                for (i=0; i<count; i++) {
                        const char *opt;
                        char *mime = (char*)gf_list_get(*atts->requiredFormats, i);
                        char *sep = strchr(mime, ';');
                        if (sep) sep[0] = 0;
                        opt = gf_cfg_get_key(compositor->user->config, "MimeTypes", mime);
                        if (sep) sep[0] = ';';
                        if (!opt) return GF_FALSE;
                }
        }

        /*process required fonts*/
        count = atts->requiredFonts ? gf_list_count(*atts->requiredFonts) : 0;
        if (count) {
                for (i=0; i<count; i++) {
                        char *font = (char*)gf_list_get(*atts->requiredFonts, i);
                        if (gf_font_manager_set_font_ex(compositor->font_manager, &font, 1, 0, GF_TRUE)==NULL)
                                return GF_FALSE;
                }
        }

        /*OK, we can render this one*/
        return GF_TRUE;
}

Bool compositor_svg_traverse_base(GF_Node *node, SVGAllAttributes *atts, GF_TraverseState *tr_state,
                                  SVGPropertiesPointers *backup_props, u32 *backup_flags)
{
        u32 inherited_flags_mask, flags;

        if (atts->requiredFeatures || atts->requiredExtensions || atts->systemLanguage
                || atts->requiredFonts || atts->requiredFormats) {
                if (!compositor_svg_evaluate_conditional(tr_state->visual->compositor, atts))
                        return GF_FALSE;
        }

        memcpy(backup_props, tr_state->svg_props, sizeof(SVGPropertiesPointers));
        *backup_flags = tr_state->svg_flags;

#if 0
        // applying inheritance and determining which group of properties are being inherited
        inherited_flags_mask = gf_svg_apply_inheritance(atts, tr_state->svg_props);
        gf_svg_apply_animations(node, tr_state->svg_props); // including again inheritance if values are 'inherit'
#else
        /* animation (including possibly inheritance) then full inheritance */
        gf_svg_apply_animations(node, tr_state->svg_props);
        inherited_flags_mask = gf_svg_apply_inheritance(atts, tr_state->svg_props);
//      gf_svg_apply_inheritance_no_inheritance(atts, tr_state->svg_props);
//      inherited_flags_mask = 0xFFFFFFFF;
#endif
        tr_state->svg_flags &= inherited_flags_mask;
        flags = gf_node_dirty_get(node);
        tr_state->svg_flags |= flags;

        return GF_TRUE;
}
#endif
/* [<][>][^][v][top][bottom][index][help] */
root/src/compositor/svg_base.c

DEFINITIONS
