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src/buffer: Automatically adapt to scale attribute

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Based on discussion in PR #389
This commit is contained in:
Consolatis 2022-06-12 21:11:25 +02:00 • committed by Johan Malm
parent 5626c20c44
commit 505f92e733
3 changed files with 17 additions and 4 deletions
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2
include/buffer.h
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@ -37,6 +37,8 @@ struct lab_data_buffer {
uint32_t format;
size_t stride;
bool free_on_destroy;
uint32_t unscaled_width;
uint32_t unscaled_height;
};
/* Create a buffer which creates a new cairo CAIRO_FORMAT_ARGB32 surface */

15
src/buffer.c
View file

@ -92,10 +92,23 @@ buffer_create_cairo(uint32_t width, uint32_t height, float scale,
if (!buffer) {
return NULL;
}
wlr_buffer_init(&buffer->base, &data_buffer_impl, width, height);
buffer->unscaled_width = width;
buffer->unscaled_height = height;
width *= scale;
height *= scale;
/* Allocate the buffer with the scaled size */
wlr_buffer_init(&buffer->base, &data_buffer_impl, width, height);
cairo_surface_t *surf =
cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
/**
* Tell cairo about the device scale so we can keep drawing in unscaled
* coordinate space. Pango will automatically use the cairo scale attribute
* as well when creating text on this surface.
*
* For a more complete explanation see PR #389
*/
cairo_surface_set_device_scale(surf, scale, scale);
buffer->cairo = cairo_create(surf);

4
src/osd.c
View file

@ -129,13 +129,11 @@ osd_update(struct server *server)
float scale = output->wlr_output->scale;
int w = (OSD_ITEM_WIDTH + (2 * OSD_BORDER_WIDTH));
int h = get_osd_height(&server->views);
int scaled_w = w * scale;
int scaled_h = h * scale;
if (output->osd_buffer) {
wlr_buffer_drop(&output->osd_buffer->base);
}
output->osd_buffer = buffer_create_cairo(scaled_w, scaled_h, scale, true);
output->osd_buffer = buffer_create_cairo(w, h, scale, true);
cairo_t *cairo = output->osd_buffer->cairo;
cairo_surface_t *surf = cairo_get_target(cairo);