static void redraw_handler(struct widget *widget, void *data) { struct demoapp *app = data; cairo_t *cr; struct rectangle allocation; uint32_t time; widget_get_allocation(app->widget, &allocation); cr = widget_cairo_create(widget); cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height); cairo_set_source_rgba(cr, 0, 0.8, 0, 0.8); cairo_fill(cr); time = widget_get_last_time(widget); cairo_set_source_rgba(cr, 0.5, 1.0, 0.5, 1.0); draw_spinner(cr, &allocation, time); cairo_destroy(cr); DBG("%dx%d @ %d,%d, last time %u\n", allocation.width, allocation.height, allocation.x, allocation.y, time); }
static void sub_redraw_handler(struct widget *widget, void *data) { struct demoapp *app = data; cairo_t *cr; struct rectangle allocation; uint32_t time; widget_get_allocation(app->subsurface, &allocation); cr = widget_cairo_create(widget); cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); /* debug: paint whole surface magenta; no magenta should show */ cairo_set_source_rgba(cr, 0.9, 0.0, 0.9, 1.0); cairo_paint(cr); cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height); cairo_clip(cr); cairo_set_source_rgba(cr, 0.8, 0, 0, 0.8); cairo_paint(cr); time = widget_get_last_time(widget); cairo_set_source_rgba(cr, 1.0, 0.5, 0.5, 1.0); draw_spinner(cr, &allocation, time); cairo_destroy(cr); if (app->animate) widget_schedule_redraw(app->subsurface); DBG("%dx%d @ %d,%d, last time %u\n", allocation.width, allocation.height, allocation.x, allocation.y, time); }
static void redraw_handler(struct widget *widget, void *data) { struct smoke *smoke = data; uint32_t time = widget_get_last_time(smoke->widget); cairo_surface_t *surface; diffuse(smoke, time / 30, smoke->b[0].u, smoke->b[1].u); diffuse(smoke, time / 30, smoke->b[0].v, smoke->b[1].v); project(smoke, time / 30, smoke->b[1].u, smoke->b[1].v, smoke->b[0].u, smoke->b[0].v); advect(smoke, time / 30, smoke->b[1].u, smoke->b[1].v, smoke->b[1].u, smoke->b[0].u); advect(smoke, time / 30, smoke->b[1].u, smoke->b[1].v, smoke->b[1].v, smoke->b[0].v); project(smoke, time / 30, smoke->b[0].u, smoke->b[0].v, smoke->b[1].u, smoke->b[1].v); diffuse(smoke, time / 30, smoke->b[0].d, smoke->b[1].d); advect(smoke, time / 30, smoke->b[0].u, smoke->b[0].v, smoke->b[1].d, smoke->b[0].d); surface = window_get_surface(smoke->window); render(smoke, surface); window_damage(smoke->window, 0, 0, smoke->width, smoke->height); cairo_surface_destroy(surface); widget_schedule_redraw(smoke->widget); }