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scene: add wlr_scene_buffer_set_source_box

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This commit is contained in:
Simon Ser 2021-09-20 17:41:52 +02:00 • committed by Simon Zeni
parent fdc22449d6
commit 63040d6744
2 changed files with 56 additions and 19 deletions
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10
include/wlr/types/wlr_scene.h
View file

@ -94,6 +94,7 @@ struct wlr_scene_buffer {
// private state
struct wlr_texture *texture;
struct wlr_fbox src_box;
};
/** A viewport for an output in the scene-graph */
@ -211,6 +212,15 @@ void wlr_scene_rect_set_color(struct wlr_scene_rect *rect, const float color[sta
struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_node *parent,
struct wlr_buffer *buffer);
/**
* Set the source rectangle describing the region of the buffer which will be
* sampled to render this node. This allows cropping the buffer.
*
* If NULL, the whole buffer is sampled. By default, the source box is NULL.
*/
void wlr_scene_buffer_set_source_box(struct wlr_scene_buffer *scene_buffer,
const struct wlr_fbox *box);
/**
* Add a viewport for the specified output to the scene-graph.
*

63
types/scene/wlr_scene.c
View file

@ -266,6 +266,23 @@ struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_node *parent,
return scene_buffer;
}
void wlr_scene_buffer_set_source_box(struct wlr_scene_buffer *scene_buffer,
const struct wlr_fbox *box) {
struct wlr_fbox *cur = &scene_buffer->src_box;
if ((wlr_fbox_empty(box) && wlr_fbox_empty(cur)) ||
(box != NULL && memcmp(cur, box, sizeof(*box)) == 0)) {
return;
}
if (box != NULL) {
memcpy(cur, box, sizeof(*box));
} else {
memset(cur, 0, sizeof(*cur));
}
scene_node_damage_whole(&scene_buffer->node);
}
static struct wlr_texture *scene_buffer_get_texture(
struct wlr_scene_buffer *scene_buffer, struct wlr_renderer *renderer) {
struct wlr_client_buffer *client_buffer =
@ -571,20 +588,29 @@ static void render_rect(struct wlr_output *output,
static void render_texture(struct wlr_output *output,
pixman_region32_t *output_damage, struct wlr_texture *texture,
const struct wlr_box *box, const float matrix[static 9]) {
const struct wlr_fbox *src_box, const struct wlr_box *dst_box,
const float matrix[static 9]) {
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
assert(renderer);
struct wlr_fbox default_src_box = {0};
if (wlr_fbox_empty(src_box)) {
default_src_box.width = dst_box->width;
default_src_box.height = dst_box->height;
src_box = &default_src_box;
}
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_init_rect(&damage, box->x, box->y, box->width, box->height);
pixman_region32_init_rect(&damage, dst_box->x, dst_box->y,
dst_box->width, dst_box->height);
pixman_region32_intersect(&damage, &damage, output_damage);
int nrects;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
for (int i = 0; i < nrects; ++i) {
scissor_output(output, &rects[i]);
wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0);
wlr_render_subtexture_with_matrix(renderer, texture, src_box, matrix, 1.0);
}
pixman_region32_fini(&damage);
@ -600,7 +626,7 @@ static void render_node_iterator(struct wlr_scene_node *node,
struct render_data *data = _data;
struct wlr_output *output = data->output;
pixman_region32_t *output_damage = data->damage;
struct wlr_box box = {
struct wlr_box dst_box = {
.x = x,
.y = y,
};
@ -621,25 +647,25 @@ static void render_node_iterator(struct wlr_scene_node *node,
return;
}
box.width = surface->current.width;
box.height = surface->current.height;
scale_box(&box, output->scale);
dst_box.width = surface->current.width;
dst_box.height = surface->current.height;
scale_box(&dst_box, output->scale);
enum wl_output_transform transform =
wlr_output_transform_invert(surface->current.transform);
wlr_matrix_project_box(matrix, &box, transform, 0.0,
wlr_matrix_project_box(matrix, &dst_box, transform, 0.0,
output->transform_matrix);
render_texture(output, output_damage, texture, &box, matrix);
render_texture(output, output_damage, texture, NULL, &dst_box, matrix);
break;
case WLR_SCENE_NODE_RECT:;
struct wlr_scene_rect *scene_rect = scene_rect_from_node(node);
box.width = scene_rect->width;
box.height = scene_rect->height;
scale_box(&box, data->output->scale);
dst_box.width = scene_rect->width;
dst_box.height = scene_rect->height;
scale_box(&dst_box, data->output->scale);
render_rect(output, output_damage, scene_rect->color, &box,
render_rect(output, output_damage, scene_rect->color, &dst_box,
output->transform_matrix);
break;
case WLR_SCENE_NODE_BUFFER:;
@ -651,14 +677,15 @@ static void render_node_iterator(struct wlr_scene_node *node,
return;
}
box.width = scene_buffer->buffer->width;
box.height = scene_buffer->buffer->height;
scale_box(&box, data->output->scale);
dst_box.width = scene_buffer->buffer->width;
dst_box.height = scene_buffer->buffer->height;
scale_box(&dst_box, data->output->scale);
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0.0,
wlr_matrix_project_box(matrix, &dst_box, WL_OUTPUT_TRANSFORM_NORMAL, 0.0,
output->transform_matrix);
render_texture(output, output_damage, texture, &box, matrix);
render_texture(output, output_damage, texture, &scene_buffer->src_box,
&dst_box, matrix);
break;
}
}