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eeshow/gui/over.c, over.h: support icon overlays
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3affbc3c3c
commit
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@ -40,6 +40,8 @@
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struct overlay {
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const char *s;
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cairo_surface_t *icon;
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struct overlay_style style;
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struct aoi **aois;
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@ -54,7 +56,7 @@ struct overlay {
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};
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/* ----- Drawing core ------------------------------------------------------ */
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/* ----- Drawing helper functions ------------------------------------------ */
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static void rrect(cairo_t *cr, double x, double y, double w, double h, int r)
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@ -118,7 +120,10 @@ static void post_aoi(struct overlay *over, int x, int y, unsigned w, unsigned h)
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}
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static unsigned overlay_draw(struct overlay *over, cairo_t *cr,
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/* ----- Drawing text ------------------------------------------------------ */
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static unsigned overlay_draw_text(struct overlay *over, cairo_t *cr,
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int x, int y, int dx, int dy)
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{
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const struct overlay_style *style = &over->style;
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@ -199,9 +204,60 @@ fprintf(stderr, "%u(%d) %u %.60s\n", ty, ink_rect.y / PANGO_SCALE, ink_h, over->
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}
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/* ----- Drawing an icon --------------------------------------------------- */
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static unsigned overlay_draw_icon(struct overlay *over, cairo_t *cr,
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int x, int y, int dx, int dy)
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{
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const struct overlay_style *style = &over->style;
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unsigned iw, ih; /* icon size */
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unsigned w, h; /* box size */
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int ix, iy; /* icon start position */
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iw = cairo_image_surface_get_width(over->icon);
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iw = iw > style->wmin ? iw : style->wmin;
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iw = !style->wmax || iw < style->wmax ? iw : style->wmax;
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ih = cairo_image_surface_get_height(over->icon);
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ih = ih > style->hmin ? ih : style->hmin;
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ih = !style->hmax || ih < style->hmax ? ih : style->hmax;
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w = iw + 2 * style->pad;
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h = ih + 2 * style->pad;
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if (dx < 0)
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x -= w;
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if (dy < 0)
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y -= h;
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ix = x + style->pad;
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iy = y + style->pad;
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background(over, cr, x, y, w, h);
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cairo_set_source_surface(cr, over->icon, ix, iy);
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cairo_paint(cr);
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post_aoi(over, x, y, w, h);
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return h;
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}
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/* ----- Drawing interfaces ------------------------------------------------ */
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static unsigned overlay_draw(struct overlay *over, cairo_t *cr,
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int x, int y, int dx, int dy)
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{
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if (over->s)
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return overlay_draw_text(over, cr, x, y, dx, dy);
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else
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return overlay_draw_icon(over, cr, x, y, dx, dy);
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}
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void overlay_draw_all_d(struct overlay *overlays, cairo_t *cr,
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int x, int y, int dx, int dy)
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{
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@ -249,11 +305,11 @@ void overlay_draw_all(struct overlay *overlays, cairo_t *cr, int x, int y)
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}
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/* ----- Sizing ------------------------------------------------------------ */
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/* ----- Sizing text ------------------------------------------------------- */
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void overlay_size(const struct overlay *over, PangoContext *pango_context,
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int *w, int *h)
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static void overlay_size_text(const struct overlay *over,
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PangoContext *pango_context, int *w, int *h)
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{
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const struct overlay_style *style = &over->style;
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PangoLayout *layout;
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@ -287,9 +343,45 @@ void overlay_size(const struct overlay *over, PangoContext *pango_context,
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ink_h = !style->hmax || ink_h < style->hmax ? ink_h : style->hmax;
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if (w)
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*w = ink_w + 2 * over->style.pad;
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*w = ink_w + 2 * style->pad;
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if (h)
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*h = ink_h + 2 * over->style.pad;
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*h = ink_h + 2 * style->pad;
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}
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/* ----- Sizing icons ------------------------------------------------------ */
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static void overlay_size_icon(const struct overlay *over, int *w, int *h)
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{
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const struct overlay_style *style = &over->style;
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unsigned iw, ih; /* effectively used icon size */
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iw = cairo_image_surface_get_width(over->icon);
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iw = iw > style->wmin ? iw : style->wmin;
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iw = !style->wmax || iw < style->wmax ? iw : style->wmax;
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ih = cairo_image_surface_get_height(over->icon);
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ih = ih > style->hmin ? ih : style->hmin;
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ih = !style->hmax || ih < style->hmax ? ih : style->hmax;
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if (w)
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*w = iw + 2 * style->pad;
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if (h)
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*h = ih + 2 * style->pad;
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}
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/* ----- Sizing ------------------------------------------------------------ */
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void overlay_size(const struct overlay *over, PangoContext *pango_context,
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int *w, int *h)
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{
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if (over->s)
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overlay_size_text(over, pango_context, w, h);
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else
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overlay_size_icon(over, w, h);
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}
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@ -335,6 +427,7 @@ struct overlay *overlay_add(struct overlay **overlays, struct aoi **aois,
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over = alloc_type(struct overlay);
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over->s = NULL;
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over->icon = NULL;
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over->style = overlay_style_default;
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over->aois = aois;
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@ -381,6 +474,13 @@ void overlay_text(struct overlay *over, const char *fmt, ...)
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}
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void overlay_icon(struct overlay *over, cairo_surface_t *icon)
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{
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assert(!over->s);
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over->icon = cairo_surface_reference(icon);
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}
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/* ----- Nesting ----------------------------------------------------------- */
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@ -414,6 +514,8 @@ static void overlay_free(struct overlay *over)
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if (over->aoi)
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aoi_remove(over->aois, over->aoi);
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free((void *) over->s);
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if (!over->s)
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cairo_surface_destroy(over->icon);
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free(over);
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}
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@ -58,6 +58,7 @@ struct overlay *overlay_add(struct overlay **overlays, struct aoi **aois,
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void overlay_text_raw(struct overlay *over, const char *s);
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void overlay_text(struct overlay *over, const char *fmt, ...);
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void overlay_icon(struct overlay *over, cairo_surface_t *icon);
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void overlay_style(struct overlay *over, const struct overlay_style *style);
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void overlay_set_related(struct overlay *over, struct overlay *related);
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