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Merge pull request #522 from emersion/fix-drm-output-transform-cursor

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Fix cursor on transformed output with DRM backend
This commit is contained in:
Tony Crisci 2017-12-27 05:48:45 -05:00 committed by GitHub
commit 6c2242e66b
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 34 additions and 9 deletions
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7
backend/drm/drm.c
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@ -543,10 +543,11 @@ static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
// OpenGL will read the pixels out upside down,
// so we need to flip the image vertically
enum wl_output_transform transform = wlr_output_transform_compose(
wlr_output_transform_invert(output->transform),
WL_OUTPUT_TRANSFORM_FLIPPED_180);
wlr_matrix_texture(plane->matrix, plane->surf.width, plane->surf.height,
conn->output.transform ^ WL_OUTPUT_TRANSFORM_FLIPPED_180);
// TODO the image needs to be rotated depending on the output rotation
transform);
plane->wlr_tex =
wlr_render_texture_create(plane->surf.renderer->wlr_rend);

15
include/wlr/types/wlr_output.h
View file

@ -118,6 +118,19 @@ bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
double x, double y);
void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor);
enum wl_output_transform wlr_output_transform_invert(enum wl_output_transform);
/**
* Returns the transform that, when composed with `tr`, gives
* `WL_OUTPUT_TRANSFORM_NORMAL`.
*/
enum wl_output_transform wlr_output_transform_invert(
enum wl_output_transform tr);
/**
* Returns a transform that, when applied, has the same effect as applying
* sequentially `tr_a` and `tr_b`.
*/
enum wl_output_transform wlr_output_transform_compose(
enum wl_output_transform tr_a, enum wl_output_transform tr_b);
#endif

21
types/wlr_output.c
View file

@ -726,11 +726,22 @@ void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
free(cursor);
}
enum wl_output_transform wlr_output_transform_invert(
enum wl_output_transform transform) {
if ((transform & WL_OUTPUT_TRANSFORM_90) &&
!(transform & WL_OUTPUT_TRANSFORM_FLIPPED)) {
transform ^= WL_OUTPUT_TRANSFORM_180;
enum wl_output_transform tr) {
if ((tr & WL_OUTPUT_TRANSFORM_90) && !(tr & WL_OUTPUT_TRANSFORM_FLIPPED)) {
tr ^= WL_OUTPUT_TRANSFORM_180;
}
return transform;
return tr;
}
enum wl_output_transform wlr_output_transform_compose(
enum wl_output_transform tr_a, enum wl_output_transform tr_b) {
uint32_t flipped = (tr_a ^ tr_b) & WL_OUTPUT_TRANSFORM_FLIPPED;
uint32_t rotated =
(tr_a + tr_b) & (WL_OUTPUT_TRANSFORM_90 | WL_OUTPUT_TRANSFORM_180);
if ((tr_a & WL_OUTPUT_TRANSFORM_FLIPPED) && (tr_b & WL_OUTPUT_TRANSFORM_FLIPPED)) {
rotated = wlr_output_transform_invert(rotated);
}
return flipped | rotated;
}