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GskTransform: Restructure _to_affine and _to_translation

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Make the simple cases more explicit.
This commit is contained in:
Timm Bäder 2020-07-24 18:33:33 +02:00
parent 0ce32cd4b5
commit fa85ec5cf5
1 changed files with 50 additions and 22 deletions
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72
gsk/gsktransform.c
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@ -1539,7 +1539,7 @@ gsk_transform_to_2d (GskTransform *self,
* Converts a #GskTransform to 2D affine transformation
* factors.
* @self must be a 2D transformation. If you are not
* sure, use gsk_transform_get_category() >=
* sure, use gsk_transform_get_category() >=
* %GSK_TRANSFORM_CATEGORY_2D_AFFINE to check.
*/
void
@ -1549,15 +1549,8 @@ gsk_transform_to_affine (GskTransform *self,
float *out_dx,
float *out_dy)
{
if (self == NULL ||
self->category < GSK_TRANSFORM_CATEGORY_2D_AFFINE)
if (self == NULL)
{
if (self != NULL)
{
char *s = gsk_transform_to_string (self);
g_warning ("Given transform \"%s\" is not an affine 2D transform.", s);
g_free (s);
}
*out_scale_x = 1.0f;
*out_scale_y = 1.0f;
*out_dx = 0.0f;
@ -1565,9 +1558,32 @@ gsk_transform_to_affine (GskTransform *self,
return;
}
gsk_transform_to_affine (self->next,
out_scale_x, out_scale_y,
out_dx, out_dy);
if (G_UNLIKELY (self->category < GSK_TRANSFORM_CATEGORY_2D_AFFINE))
{
char *s = gsk_transform_to_string (self);
g_warning ("Given transform \"%s\" is not an affine 2D transform.", s);
g_free (s);
*out_scale_x = 1.0f;
*out_scale_y = 1.0f;
*out_dx = 0.0f;
*out_dy = 0.0f;
return;
}
if (self->next != NULL)
{
gsk_transform_to_affine (self->next,
out_scale_x, out_scale_y,
out_dx, out_dy);
}
else
{
*out_scale_x = 1.0f;
*out_scale_y = 1.0f;
*out_dx = 0.0f;
*out_dy = 0.0f;
}
self->transform_class->apply_affine (self,
out_scale_x, out_scale_y,
@ -1592,22 +1608,34 @@ gsk_transform_to_translate (GskTransform *self,
float *out_dx,
float *out_dy)
{
if (self == NULL ||
self->category < GSK_TRANSFORM_CATEGORY_2D_TRANSLATE)
if (self == NULL)
{
if (self != NULL)
{
char *s = gsk_transform_to_string (self);
g_warning ("Given transform \"%s\" is not a 2D translation.", s);
g_free (s);
}
*out_dx = 0.0f;
*out_dy = 0.0f;
return;
}
gsk_transform_to_translate (self->next,
out_dx, out_dy);
if (G_UNLIKELY (self->category < GSK_TRANSFORM_CATEGORY_2D_TRANSLATE))
{
char *s = gsk_transform_to_string (self);
g_warning ("Given transform \"%s\" is not an affine 2D translation.", s);
g_free (s);
*out_dx = 0.0f;
*out_dy = 0.0f;
return;
}
if (self->next != NULL)
{
gsk_transform_to_translate (self->next,
out_dx, out_dy);
}
else
{
*out_dx = 0.0f;
*out_dy = 0.0f;
}
self->transform_class->apply_translate (self,
out_dx, out_dy);