diff options
Diffstat (limited to 'src/charts.c')
| -rw-r--r-- | src/charts.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/charts.c b/src/charts.c index a94714b..fddef35 100644 --- a/src/charts.c +++ b/src/charts.c @@ -214,7 +214,7 @@ static Picture create_picture(vwm_charts_t *charts, unsigned width, unsigned hei /* convenience helper for creating a filled picture, supply res_pixmap to keep a reference to the pixmap drawable. */ -static Picture create_picture_fill(vwm_charts_t *charts, unsigned width, unsigned height, unsigned depth, unsigned long attrs_mask, XRenderPictureAttributes *attrs, XRenderColor *color, Pixmap *res_pixmap) +static Picture create_picture_fill(vwm_charts_t *charts, unsigned width, unsigned height, unsigned depth, unsigned long attrs_mask, XRenderPictureAttributes *attrs, const XRenderColor *color, Pixmap *res_pixmap) { vwm_xserver_t *xserver = charts->xserver; Picture picture; @@ -1172,6 +1172,47 @@ void vwm_chart_render(vwm_charts_t *charts, vwm_chart_t *chart, int op, Picture } +/* render the chart into a newly allocated pixmap, intended for snapshotting purposes */ +void vwm_chart_render_as_pixmap(vwm_charts_t *charts, vwm_chart_t *chart, const XRenderColor *bg_color, Pixmap *res_pixmap) +{ + static const XRenderColor blackness = { 0x0000, 0x0000, 0x0000, 0xFFFF}; + Picture dest; + + assert(charts); + assert(chart); + assert(res_pixmap); + + if (!bg_color) + bg_color = &blackness; + + dest = create_picture_fill(charts, chart->width, chart->height, 32, 0, NULL, bg_color, res_pixmap); + vwm_chart_render(charts, chart, PictOpOver, dest, 0, 0, chart->width, chart->height); + XRenderFreePicture(charts->xserver->display, dest); +} + + +void vwm_chart_render_as_ximage(vwm_charts_t *charts, vwm_chart_t *chart, const XRenderColor *bg_color, XImage **res_ximage) +{ + Pixmap dest_pixmap; + + assert(charts); + assert(chart); + assert(res_ximage); + + vwm_chart_render_as_pixmap(charts, chart, bg_color, &dest_pixmap); + *res_ximage = XGetImage(charts->xserver->display, + dest_pixmap, + 0, + 0, + chart->width, + chart->height, + AllPlanes, + ZPixmap); + + XFreePixmap(charts->xserver->display, dest_pixmap); +} + + /* increase the sample rate relative to current using the table of intervals */ void vwm_charts_rate_increase(vwm_charts_t *charts) { |