/* exported interface, documented in thumbnail.h */
bool thumbnail_redraw(struct hlcache_handle *content,
int width, int height, const struct redraw_context *ctx)
{
struct redraw_context new_ctx = *ctx;
struct rect clip;
struct content_redraw_data data;
float scale;
bool plot_ok = true;
assert(content);
if (ctx->plot->option_knockout)
knockout_plot_start(ctx, &new_ctx);
/* Set clip rectangle to required thumbnail size */
clip.x0 = 0;
clip.y0 = 0;
clip.x1 = width;
clip.y1 = height;
new_ctx.plot->clip(&clip);
/* Plot white background */
plot_ok &= new_ctx.plot->rectangle(clip.x0, clip.y0, clip.x1, clip.y1,
plot_style_fill_white);
/* Find the scale we're using */
scale = thumbnail_get_redraw_scale(content, width);
/* Set up content redraw data */
data.x = 0;
data.y = 0;
data.width = width;
data.height = height;
data.background_colour = 0xFFFFFF;
data.scale = scale;
data.repeat_x = false;
data.repeat_y = false;
/* Render the content */
plot_ok &= content_redraw(content, &data, &clip, &new_ctx);
if (ctx->plot->option_knockout)
knockout_plot_end();
return plot_ok;
}
/* exported interface, documented in content/content.h */
bool content_scaled_redraw(struct hlcache_handle *h,
int width, int height, const struct redraw_context *ctx)
{
struct content *c = hlcache_handle_get_content(h);
struct redraw_context new_ctx = *ctx;
struct rect clip;
struct content_redraw_data data;
bool plot_ok = true;
assert(c != NULL);
/* ensure it is safe to attempt redraw */
if (c->locked) {
return true;
}
/* ensure we have a redrawable content */
if (c->handler->redraw == NULL) {
return true;
}
LOG("Content %p %dx%d ctx:%p", c, width, height, ctx);
if (ctx->plot->option_knockout) {
knockout_plot_start(ctx, &new_ctx);
}
/* Set clip rectangle to required thumbnail size */
clip.x0 = 0;
clip.y0 = 0;
clip.x1 = width;
clip.y1 = height;
new_ctx.plot->clip(&clip);
/* Plot white background */
plot_ok &= new_ctx.plot->rectangle(clip.x0, clip.y0, clip.x1, clip.y1,
plot_style_fill_white);
/* Set up content redraw data */
data.x = 0;
data.y = 0;
data.width = width;
data.height = height;
data.background_colour = 0xFFFFFF;
data.repeat_x = false;
data.repeat_y = false;
/* Find the scale factor to use if the content has a width */
if (c->width) {
data.scale = (float)width / (float)c->width;
} else {
data.scale = 1.0;
}
/* Render the content */
plot_ok &= c->handler->redraw(c, &data, &clip, &new_ctx);
if (ctx->plot->option_knockout) {
knockout_plot_end();
}
return plot_ok;
}