C++ (Cpp) rsvg_text_create_layout Beispiele

Beispiel #1

Datei: rsvg-text.c Projekt: chagge/libsvg

void
rsvg_text_render_text (RsvgDrawingCtx * ctx, const char *text, gdouble * x, gdouble * y)
{
    PangoContext *context;
    PangoLayout *layout;
    PangoLayoutIter *iter;
    RsvgState *state;
    gint w, h, baseline;

    state = rsvg_current_state (ctx);

    /* Do not render the text if the font size is zero. See bug #581491. */
    if (state->font_size.length == 0)
        return;

    context = ctx->render->create_pango_context (ctx);
    layout = rsvg_text_create_layout (ctx, state, text, context);
    pango_layout_get_size (layout, &w, &h);
    iter = pango_layout_get_iter (layout);
    baseline = pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
    pango_layout_iter_free (iter);
    ctx->render->render_pango_layout (ctx, layout, *x, *y - baseline);
    *x += w / (double)PANGO_SCALE;
    g_object_unref (layout);
    g_object_unref (context);
}

Beispiel #2

Datei: rsvg-text.c Projekt: johnjwang/librsvg

static void
draw_text (RsvgDrawingCtx * ctx, cairo_t *cr, double *x, double *y,
           const char *text)
{
    PangoContext *context;
    PangoLayout *layout;
    RsvgState *state;
    PangoLayoutLine *line;
    int w, h;

    state = rsvg_current_state (ctx);
    if (state->font_size.length == 0)
        return;

    context = ctx->render->create_pango_context (ctx);
    layout = rsvg_text_create_layout (ctx, state, text, context);
    pango_layout_get_size(layout, &w, &h);

    // From pango example
    // http://git.gnome.org/browse/pango/tree/examples/cairotwisted.c
    line = pango_layout_get_line_readonly (layout, 0);

    cairo_move_to (cr, *x, *y);
    pango_cairo_layout_line_path (cr, line);

    // Update x, y based on dimensions of text drawn
    if (PANGO_GRAVITY_IS_VERTICAL (state->text_gravity))
        *y += w / (double)PANGO_SCALE;
    else
        *x += w / (double)PANGO_SCALE;

    g_object_unref (layout);
    g_object_unref (context);
}

Beispiel #3

Datei: rsvg-text.c Projekt: chagge/libsvg

static RsvgTextLayout *
rsvg_text_layout_new (RsvgDrawingCtx * ctx, RsvgState * state, const char *text)
{
    RsvgTextLayout *layout;

    if (ctx->pango_context == NULL)
        ctx->pango_context = ctx->render->create_pango_context (ctx);

    layout = g_new0 (RsvgTextLayout, 1);

    layout->layout = rsvg_text_create_layout (ctx, state, text, ctx->pango_context);
    layout->ctx = ctx;

    layout->anchor = state->text_anchor;

    return layout;
}

Beispiel #4

Datei: rsvg-text.c Projekt: johnjwang/librsvg

void
rsvg_text_render_text (RsvgDrawingCtx * ctx, const char *text, gdouble * x, gdouble * y)
{
    PangoContext *context;
    PangoLayout *layout;
    PangoLayoutIter *iter;
    RsvgState *state;
    gint w, h, offsetX, offsetY;

    state = rsvg_current_state (ctx);

    /* Do not render the text if the font size is zero. See bug #581491. */
    if (state->font_size.length == 0)
        return;

    context = ctx->render->create_pango_context (ctx);
    layout = rsvg_text_create_layout (ctx, state, text, context);
    pango_layout_get_size (layout, &w, &h);
    iter = pango_layout_get_iter (layout);
    if (PANGO_GRAVITY_IS_VERTICAL (state->text_gravity)) {
        offsetX = -pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
        offsetY = 0;
    } else {
        offsetX = 0;
        offsetY = pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
    }
    pango_layout_iter_free (iter);
    ctx->render->render_pango_layout (ctx, layout, *x - offsetX, *y - offsetY);
    if (PANGO_GRAVITY_IS_VERTICAL (state->text_gravity))
        *y += w / (double)PANGO_SCALE;
    else
        *x += w / (double)PANGO_SCALE;

    g_object_unref (layout);
    g_object_unref (context);
}