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Add fixed-point versions of weston_surface_{to, from}_global 

To be used by input code, paralleling the existing integer versions.

Enlarge the surface_{to,from}_global_float input types to GLfloat to
avoid losing precision.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Daniel Stone 2012-05-08 17:17:53 +01:00 committed by Kristian Høgsberg
parent eb95d0de7e
commit bd3489b6e1
2 changed files with 44 additions and 4 deletions
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38
src/compositor.c
View File

@ -266,7 +266,7 @@ weston_surface_set_color(struct weston_surface *surface,
static void
surface_to_global_float(struct weston_surface *surface,
int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
GLfloat sx, GLfloat sy, GLfloat *x, GLfloat *y)
{
if (surface->transform.enabled) {
struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
@ -436,13 +436,28 @@ weston_surface_update_transform(struct weston_surface *surface)
WL_EXPORT void
weston_surface_to_global_float(struct weston_surface *surface,
int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
GLfloat sx, GLfloat sy, GLfloat *x, GLfloat *y)
{
weston_surface_update_transform(surface);
surface_to_global_float(surface, sx, sy, x, y);
}
WL_EXPORT void
weston_surface_to_global_fixed(struct weston_surface *surface,
wl_fixed_t sx, wl_fixed_t sy,
wl_fixed_t *x, wl_fixed_t *y)
{
GLfloat xf, yf;
weston_surface_to_global_float(surface,
wl_fixed_to_double(sx),
wl_fixed_to_double(sy),
&xf, &yf);
*x = wl_fixed_from_double(xf);
*y = wl_fixed_from_double(yf);
}
WL_EXPORT void
weston_surface_to_global(struct weston_surface *surface,
int32_t sx, int32_t sy, int32_t *x, int32_t *y)
@ -456,7 +471,7 @@ weston_surface_to_global(struct weston_surface *surface,
static void
surface_from_global_float(struct weston_surface *surface,
int32_t x, int32_t y, GLfloat *sx, GLfloat *sy)
GLfloat x, GLfloat y, GLfloat *sx, GLfloat *sy)
{
if (surface->transform.enabled) {
struct weston_vector v = { { x, y, 0.0f, 1.0f } };
@ -480,6 +495,23 @@ surface_from_global_float(struct weston_surface *surface,
}
}
WL_EXPORT void
weston_surface_from_global_fixed(struct weston_surface *surface,
wl_fixed_t x, wl_fixed_t y,
wl_fixed_t *sx, wl_fixed_t *sy)
{
GLfloat sxf, syf;
weston_surface_update_transform(surface);
surface_from_global_float(surface,
wl_fixed_to_double(x),
wl_fixed_to_double(y),
&sxf, &syf);
*sx = wl_fixed_from_double(sxf);
*sy = wl_fixed_from_double(syf);
}
WL_EXPORT void
weston_surface_from_global(struct weston_surface *surface,
int32_t x, int32_t y, int32_t *sx, int32_t *sy)

10
src/compositor.h
View File

@ -389,12 +389,20 @@ void
weston_surface_to_global(struct weston_surface *surface,
int32_t sx, int32_t sy, int32_t *x, int32_t *y);
void
weston_surface_to_global_fixed(struct weston_surface *surface,
wl_fixed_t sx, wl_fixed_t sy,
wl_fixed_t *x, wl_fixed_t *y);
void
weston_surface_to_global_float(struct weston_surface *surface,
int32_t sx, int32_t sy, GLfloat *x, GLfloat *y);
GLfloat sx, GLfloat sy, GLfloat *x, GLfloat *y);
void
weston_surface_from_global(struct weston_surface *surface,
int32_t x, int32_t y, int32_t *sx, int32_t *sy);
void
weston_surface_from_global_fixed(struct weston_surface *surface,
wl_fixed_t x, wl_fixed_t y,
wl_fixed_t *sx, wl_fixed_t *sy);
void
weston_spring_init(struct weston_spring *spring,