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Fix cursor position in xshm plugin

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By premultiplying the cursor translation the cursor is positioned
relative, and thus correctly, when the source has transformations
applied to it.
This commit is contained in:
fryshorts 2014-06-25 19:11:41 +02:00
parent 6e9b70b046
commit 8f206def32
1 changed files with 9 additions and 5 deletions
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14
plugins/linux-xshm/xcursor.c
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@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <stdint.h>
#include <X11/extensions/Xfixes.h>
#include <graphics/matrix4.h>
#include <util/bmem.h>
#include "xcursor.h"
@ -85,22 +86,25 @@ void xcursor_tick(xcursor_t *data) {
if (!data->tex || data->last_serial != xc->cursor_serial)
xcursor_create(data, xc);
data->pos_x = -1.0 * (xc->x - xc->xhot - data->x_org);
data->pos_y = -1.0 * (xc->y - xc->yhot - data->y_org);
data->pos_x = xc->x - xc->xhot - data->x_org;
data->pos_y = xc->y - xc->yhot - data->y_org;
XFree(xc);
}
void xcursor_render(xcursor_t *data) {
/* TODO: why do i need effects ? */
struct matrix4 trans;
gs_effect_t effect = gs_get_effect();
gs_eparam_t image = gs_effect_get_param_by_name(effect, "image");
gs_effect_set_texture(image, data->tex);
gs_matrix_push();
gs_matrix_translate3f(-data->pos_x, -data->pos_y, 0);
gs_matrix_get(&trans);
gs_matrix_identity();
gs_matrix_translate3f(data->pos_x, data->pos_y, 0.0f);
gs_matrix_mul(&trans);
gs_enable_blending(True);
gs_blend_function(GS_BLEND_ONE, GS_BLEND_INVSRCALPHA);