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gtk2/gtk/gtkcsstransformvalue.c
Emmanuele Bassi 4cbe079767 Use Graphene init macros for compound literals 
The Graphene init macros can now be used for compound literals, which
means we need to update our mixed uses.
2016-11-21 16:21:38 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssbgsizevalueprivate.h"
#include <math.h>
#include <string.h>
#include "gtkcsstransformvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
typedef union _GtkCssTransform GtkCssTransform;
typedef enum {
GTK_CSS_TRANSFORM_NONE,
GTK_CSS_TRANSFORM_MATRIX,
GTK_CSS_TRANSFORM_TRANSLATE,
GTK_CSS_TRANSFORM_ROTATE,
GTK_CSS_TRANSFORM_SCALE,
GTK_CSS_TRANSFORM_SKEW,
GTK_CSS_TRANSFORM_SKEW_X,
GTK_CSS_TRANSFORM_SKEW_Y
} GtkCssTransformType;
union _GtkCssTransform {
GtkCssTransformType type;
struct {
GtkCssTransformType type;
graphene_matrix_t matrix;
} matrix;
struct {
GtkCssTransformType type;
GtkCssValue *x;
GtkCssValue *y;
GtkCssValue *z;
} translate, scale;
struct {
GtkCssTransformType type;
GtkCssValue *x;
GtkCssValue *y;
} skew;
struct {
GtkCssTransformType type;
GtkCssValue *x;
GtkCssValue *y;
GtkCssValue *z;
GtkCssValue *angle;
} rotate;
struct {
GtkCssTransformType type;
GtkCssValue *skew;
} skew_x, skew_y;
};
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
guint n_transforms;
GtkCssTransform transforms[1];
};
static GtkCssValue * gtk_css_transform_value_alloc (guint n_values);
static gboolean gtk_css_transform_value_is_none (const GtkCssValue *value);
static void
gtk_css_transform_clear (GtkCssTransform *transform)
{
switch (transform->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
break;
case GTK_CSS_TRANSFORM_TRANSLATE:
_gtk_css_value_unref (transform->translate.x);
_gtk_css_value_unref (transform->translate.y);
_gtk_css_value_unref (transform->translate.z);
break;
case GTK_CSS_TRANSFORM_ROTATE:
_gtk_css_value_unref (transform->rotate.x);
_gtk_css_value_unref (transform->rotate.y);
_gtk_css_value_unref (transform->rotate.z);
_gtk_css_value_unref (transform->rotate.angle);
break;
case GTK_CSS_TRANSFORM_SCALE:
_gtk_css_value_unref (transform->scale.x);
_gtk_css_value_unref (transform->scale.y);
_gtk_css_value_unref (transform->scale.z);
break;
case GTK_CSS_TRANSFORM_SKEW:
_gtk_css_value_unref (transform->skew.x);
_gtk_css_value_unref (transform->skew.y);
break;
case GTK_CSS_TRANSFORM_SKEW_X:
_gtk_css_value_unref (transform->skew_x.skew);
break;
case GTK_CSS_TRANSFORM_SKEW_Y:
_gtk_css_value_unref (transform->skew_y.skew);
break;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
break;
}
}
static void
gtk_css_transform_init_identity (GtkCssTransform *transform,
GtkCssTransformType type)
{
switch (type)
{
case GTK_CSS_TRANSFORM_MATRIX:
graphene_matrix_init_identity (&transform->matrix.matrix);
break;
case GTK_CSS_TRANSFORM_TRANSLATE:
transform->translate.x = _gtk_css_number_value_new (0, GTK_CSS_PX);
transform->translate.y = _gtk_css_number_value_new (0, GTK_CSS_PX);
transform->translate.z = _gtk_css_number_value_new (0, GTK_CSS_PX);
break;
case GTK_CSS_TRANSFORM_ROTATE:
transform->rotate.x = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.y = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.z = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.angle = _gtk_css_number_value_new (0, GTK_CSS_DEG);
break;
case GTK_CSS_TRANSFORM_SCALE:
transform->scale.x = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->scale.y = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->scale.z = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
break;
case GTK_CSS_TRANSFORM_SKEW:
transform->skew.x = _gtk_css_number_value_new (0, GTK_CSS_DEG);
transform->skew.y = _gtk_css_number_value_new (0, GTK_CSS_DEG);
break;
case GTK_CSS_TRANSFORM_SKEW_X:
transform->skew_x.skew = _gtk_css_number_value_new (0, GTK_CSS_DEG);
break;
case GTK_CSS_TRANSFORM_SKEW_Y:
transform->skew_y.skew = _gtk_css_number_value_new (0, GTK_CSS_DEG);
break;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
break;
}
transform->type = type;
}
static void
gtk_css_transform_apply (const GtkCssTransform *transform,
graphene_matrix_t *matrix)
{
graphene_matrix_t skew, tmp;
switch (transform->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
graphene_matrix_multiply (matrix, &transform->matrix.matrix, &tmp);
graphene_matrix_init_from_matrix (matrix, &tmp);
break;
case GTK_CSS_TRANSFORM_TRANSLATE:
graphene_matrix_translate (matrix, &GRAPHENE_POINT3D_INIT(
_gtk_css_number_value_get (transform->translate.x, 100),
_gtk_css_number_value_get (transform->translate.y, 100),
_gtk_css_number_value_get (transform->translate.z, 100)));
break;
case GTK_CSS_TRANSFORM_ROTATE:
{
graphene_vec3_t vec;
graphene_vec3_init (&vec,
_gtk_css_number_value_get (transform->rotate.x, 1),
_gtk_css_number_value_get (transform->rotate.y, 1),
_gtk_css_number_value_get (transform->rotate.z, 1));
graphene_matrix_rotate (matrix,
_gtk_css_number_value_get (transform->rotate.angle, 100),
&vec);
}
break;
case GTK_CSS_TRANSFORM_SCALE:
graphene_matrix_scale (matrix,
_gtk_css_number_value_get (transform->scale.x, 1),
_gtk_css_number_value_get (transform->scale.y, 1),
_gtk_css_number_value_get (transform->scale.z, 1));
break;
case GTK_CSS_TRANSFORM_SKEW:
graphene_matrix_init_skew (&skew,
_gtk_css_number_value_get (transform->skew.x, 100),
_gtk_css_number_value_get (transform->skew.y, 100));
graphene_matrix_multiply (matrix, &skew, &tmp);
graphene_matrix_init_from_matrix (matrix, &tmp);
break;
case GTK_CSS_TRANSFORM_SKEW_X:
graphene_matrix_init_skew (&skew,
_gtk_css_number_value_get (transform->skew_x.skew, 100),
0);
graphene_matrix_multiply (matrix, &skew, &tmp);
graphene_matrix_init_from_matrix (matrix, &tmp);
break;
case GTK_CSS_TRANSFORM_SKEW_Y:
graphene_matrix_init_skew (&skew,
0,
_gtk_css_number_value_get (transform->skew_y.skew, 100));
graphene_matrix_multiply (matrix, &skew, &tmp);
graphene_matrix_init_from_matrix (matrix, &tmp);
break;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
break;
}
}
/* NB: The returned matrix may be invalid */
static void
gtk_css_transform_value_compute_matrix (const GtkCssValue *value,
graphene_matrix_t *matrix)
{
guint i;
graphene_matrix_init_identity (matrix);
for (i = 0; i < value->n_transforms; i++)
{
gtk_css_transform_apply (&value->transforms[i], matrix);
}
}
static void
gtk_css_value_transform_free (GtkCssValue *value)
{
guint i;
for (i = 0; i < value->n_transforms; i++)
{
gtk_css_transform_clear (&value->transforms[i]);
}
g_slice_free1 (sizeof (GtkCssValue) + sizeof (GtkCssTransform) * (value->n_transforms - 1), value);
}
/* returns TRUE if dest == src */
static gboolean
gtk_css_transform_compute (GtkCssTransform *dest,
GtkCssTransform *src,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
dest->type = src->type;
switch (src->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
return TRUE;
case GTK_CSS_TRANSFORM_TRANSLATE:
dest->translate.x = _gtk_css_value_compute (src->translate.x, property_id, provider, style, parent_style);
dest->translate.y = _gtk_css_value_compute (src->translate.y, property_id, provider, style, parent_style);
dest->translate.z = _gtk_css_value_compute (src->translate.z, property_id, provider, style, parent_style);
return dest->translate.x == src->translate.x
&& dest->translate.y == src->translate.y
&& dest->translate.z == src->translate.z;
case GTK_CSS_TRANSFORM_ROTATE:
dest->rotate.x = _gtk_css_value_compute (src->rotate.x, property_id, provider, style, parent_style);
dest->rotate.y = _gtk_css_value_compute (src->rotate.y, property_id, provider, style, parent_style);
dest->rotate.z = _gtk_css_value_compute (src->rotate.z, property_id, provider, style, parent_style);
dest->rotate.angle = _gtk_css_value_compute (src->rotate.angle, property_id, provider, style, parent_style);
return dest->rotate.x == src->rotate.x
&& dest->rotate.y == src->rotate.y
&& dest->rotate.z == src->rotate.z
&& dest->rotate.angle == src->rotate.angle;
case GTK_CSS_TRANSFORM_SCALE:
dest->scale.x = _gtk_css_value_compute (src->scale.x, property_id, provider, style, parent_style);
dest->scale.y = _gtk_css_value_compute (src->scale.y, property_id, provider, style, parent_style);
dest->scale.z = _gtk_css_value_compute (src->scale.z, property_id, provider, style, parent_style);
return dest->scale.x == src->scale.x
&& dest->scale.y == src->scale.y
&& dest->scale.z == src->scale.z;
case GTK_CSS_TRANSFORM_SKEW:
dest->skew.x = _gtk_css_value_compute (src->skew.x, property_id, provider, style, parent_style);
dest->skew.y = _gtk_css_value_compute (src->skew.y, property_id, provider, style, parent_style);
return dest->skew.x == src->skew.x
&& dest->skew.y == src->skew.y;
case GTK_CSS_TRANSFORM_SKEW_X:
dest->skew_x.skew = _gtk_css_value_compute (src->skew_x.skew, property_id, provider, style, parent_style);
return dest->skew_x.skew == src->skew_x.skew;
case GTK_CSS_TRANSFORM_SKEW_Y:
dest->skew_y.skew = _gtk_css_value_compute (src->skew_y.skew, property_id, provider, style, parent_style);
return dest->skew_y.skew == src->skew_y.skew;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
return FALSE;
}
}
static GtkCssValue *
gtk_css_value_transform_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssValue *result;
gboolean changes;
guint i;
/* Special case the 99% case of "none" */
if (gtk_css_transform_value_is_none (value))
return _gtk_css_value_ref (value);
changes = FALSE;
result = gtk_css_transform_value_alloc (value->n_transforms);
for (i = 0; i < value->n_transforms; i++)
{
changes |= !gtk_css_transform_compute (&result->transforms[i],
&value->transforms[i],
property_id,
provider,
style,
parent_style);
}
if (!changes)
{
_gtk_css_value_unref (result);
result = _gtk_css_value_ref (value);
}
return result;
}
static gboolean
gtk_css_transform_equal (const GtkCssTransform *transform1,
const GtkCssTransform *transform2)
{
if (transform1->type != transform2->type)
return FALSE;
switch (transform1->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
{
guint i, j;
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
{
if (graphene_matrix_get_value (&transform1->matrix.matrix, i, j)
!= graphene_matrix_get_value (&transform2->matrix.matrix, i, j))
return FALSE;
}
return TRUE;
}
case GTK_CSS_TRANSFORM_TRANSLATE:
return _gtk_css_value_equal (transform1->translate.x, transform2->translate.x)
&& _gtk_css_value_equal (transform1->translate.y, transform2->translate.y)
&& _gtk_css_value_equal (transform1->translate.z, transform2->translate.z);
case GTK_CSS_TRANSFORM_ROTATE:
return _gtk_css_value_equal (transform1->rotate.x, transform2->rotate.x)
&& _gtk_css_value_equal (transform1->rotate.y, transform2->rotate.y)
&& _gtk_css_value_equal (transform1->rotate.z, transform2->rotate.z)
&& _gtk_css_value_equal (transform1->rotate.angle, transform2->rotate.angle);
case GTK_CSS_TRANSFORM_SCALE:
return _gtk_css_value_equal (transform1->scale.x, transform2->scale.x)
&& _gtk_css_value_equal (transform1->scale.y, transform2->scale.y)
&& _gtk_css_value_equal (transform1->scale.z, transform2->scale.z);
case GTK_CSS_TRANSFORM_SKEW:
return _gtk_css_value_equal (transform1->skew.x, transform2->skew.x)
&& _gtk_css_value_equal (transform1->skew.y, transform2->skew.y);
case GTK_CSS_TRANSFORM_SKEW_X:
return _gtk_css_value_equal (transform1->skew_x.skew, transform2->skew_x.skew);
case GTK_CSS_TRANSFORM_SKEW_Y:
return _gtk_css_value_equal (transform1->skew_y.skew, transform2->skew_y.skew);
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
return FALSE;
}
}
static gboolean
gtk_css_value_transform_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
const GtkCssValue *larger;
guint i, n;
n = MIN (value1->n_transforms, value2->n_transforms);
for (i = 0; i < n; i++)
{
if (!gtk_css_transform_equal (&value1->transforms[i], &value2->transforms[i]))
return FALSE;
}
larger = value1->n_transforms > value2->n_transforms ? value1 : value2;
for (; i < larger->n_transforms; i++)
{
GtkCssTransform transform;
gtk_css_transform_init_identity (&transform, larger->transforms[i].type);
if (!gtk_css_transform_equal (&larger->transforms[i], &transform))
{
gtk_css_transform_clear (&transform);
return FALSE;
}
gtk_css_transform_clear (&transform);
}
return TRUE;
}
static void
gtk_css_transform_transition (GtkCssTransform *result,
const GtkCssTransform *start,
const GtkCssTransform *end,
guint property_id,
double progress)
{
result->type = start->type;
switch (start->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
graphene_matrix_interpolate (&start->matrix.matrix,
&end->matrix.matrix,
progress,
&result->matrix.matrix);
break;
case GTK_CSS_TRANSFORM_TRANSLATE:
result->translate.x = _gtk_css_value_transition (start->translate.x, end->translate.x, property_id, progress);
result->translate.y = _gtk_css_value_transition (start->translate.y, end->translate.y, property_id, progress);
result->translate.z = _gtk_css_value_transition (start->translate.z, end->translate.z, property_id, progress);
break;
case GTK_CSS_TRANSFORM_ROTATE:
result->rotate.x = _gtk_css_value_transition (start->rotate.x, end->rotate.x, property_id, progress);
result->rotate.y = _gtk_css_value_transition (start->rotate.y, end->rotate.y, property_id, progress);
result->rotate.z = _gtk_css_value_transition (start->rotate.z, end->rotate.z, property_id, progress);
result->rotate.angle = _gtk_css_value_transition (start->rotate.angle, end->rotate.angle, property_id, progress);
break;
case GTK_CSS_TRANSFORM_SCALE:
result->scale.x = _gtk_css_value_transition (start->scale.x, end->scale.x, property_id, progress);
result->scale.y = _gtk_css_value_transition (start->scale.y, end->scale.y, property_id, progress);
result->scale.z = _gtk_css_value_transition (start->scale.z, end->scale.z, property_id, progress);
break;
case GTK_CSS_TRANSFORM_SKEW:
result->skew.x = _gtk_css_value_transition (start->skew.x, end->skew.x, property_id, progress);
result->skew.y = _gtk_css_value_transition (start->skew.y, end->skew.y, property_id, progress);
break;
case GTK_CSS_TRANSFORM_SKEW_X:
result->skew_x.skew = _gtk_css_value_transition (start->skew_x.skew, end->skew_x.skew, property_id, progress);
break;
case GTK_CSS_TRANSFORM_SKEW_Y:
result->skew_y.skew = _gtk_css_value_transition (start->skew_y.skew, end->skew_y.skew, property_id, progress);
break;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
break;
}
}
static GtkCssValue *
gtk_css_value_transform_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GtkCssValue *result;
guint i, n;
if (gtk_css_transform_value_is_none (start))
{
if (gtk_css_transform_value_is_none (end))
return _gtk_css_value_ref (start);
n = 0;
}
else if (gtk_css_transform_value_is_none (end))
{
n = 0;
}
else
{
n = MIN (start->n_transforms, end->n_transforms);
}
/* Check transforms are compatible. If not, transition between
* their result matrices.
*/
for (i = 0; i < n; i++)
{
if (start->transforms[i].type != end->transforms[i].type)
{
graphene_matrix_t start_matrix, end_matrix;
graphene_matrix_init_identity (&start_matrix);
gtk_css_transform_value_compute_matrix (start, &start_matrix);
graphene_matrix_init_identity (&end_matrix);
gtk_css_transform_value_compute_matrix (end, &end_matrix);
result = gtk_css_transform_value_alloc (1);
result->transforms[0].type = GTK_CSS_TRANSFORM_MATRIX;
graphene_matrix_interpolate (&start_matrix, &end_matrix, progress, &result->transforms[0].matrix.matrix);
return result;
}
}
result = gtk_css_transform_value_alloc (MAX (start->n_transforms, end->n_transforms));
for (i = 0; i < n; i++)
{
gtk_css_transform_transition (&result->transforms[i],
&start->transforms[i],
&end->transforms[i],
property_id,
progress);
}
for (; i < start->n_transforms; i++)
{
GtkCssTransform transform;
gtk_css_transform_init_identity (&transform, start->transforms[i].type);
gtk_css_transform_transition (&result->transforms[i],
&start->transforms[i],
&transform,
property_id,
progress);
gtk_css_transform_clear (&transform);
}
for (; i < end->n_transforms; i++)
{
GtkCssTransform transform;
gtk_css_transform_init_identity (&transform, end->transforms[i].type);
gtk_css_transform_transition (&result->transforms[i],
&transform,
&end->transforms[i],
property_id,
progress);
gtk_css_transform_clear (&transform);
}
g_assert (i == MAX (start->n_transforms, end->n_transforms));
return result;
}
static void
gtk_css_transform_print (const GtkCssTransform *transform,
GString *string)
{
char buf[G_ASCII_DTOSTR_BUF_SIZE];
switch (transform->type)
{
case GTK_CSS_TRANSFORM_MATRIX:
if (graphene_matrix_is_2d (&transform->matrix.matrix))
{
g_string_append (string, "matrix(");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 0, 0));
g_string_append (string, buf);
g_string_append (string, ", ");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 0, 1));
g_string_append (string, buf);
g_string_append (string, ", ");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 0, 2));
g_string_append (string, buf);
g_string_append (string, ", ");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 1, 0));
g_string_append (string, buf);
g_string_append (string, ", ");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 1, 1));
g_string_append (string, buf);
g_string_append (string, ", ");
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, 1, 2));
g_string_append (string, buf);
g_string_append (string, ")");
}
else
{
guint i;
g_string_append (string, "matrix3d(");
for (i = 0; i < 16; i++)
{
g_ascii_dtostr (buf, sizeof (buf), graphene_matrix_get_value (&transform->matrix.matrix, i / 4, i % 4));
g_string_append (string, buf);
if (i < 15)
g_string_append (string, ", ");
}
g_string_append (string, ")");
}
break;
case GTK_CSS_TRANSFORM_TRANSLATE:
g_string_append (string, "translate3d(");
_gtk_css_value_print (transform->translate.x, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->translate.y, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->translate.z, string);
g_string_append (string, ")");
break;
case GTK_CSS_TRANSFORM_ROTATE:
g_string_append (string, "rotate3d(");
_gtk_css_value_print (transform->rotate.x, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->rotate.y, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->rotate.z, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->rotate.angle, string);
g_string_append (string, ")");
break;
case GTK_CSS_TRANSFORM_SCALE:
if (_gtk_css_number_value_get (transform->scale.z, 100) == 1)
{
g_string_append (string, "scale(");
_gtk_css_value_print (transform->scale.x, string);
if (!_gtk_css_value_equal (transform->scale.x, transform->scale.y))
{
g_string_append (string, ", ");
_gtk_css_value_print (transform->scale.y, string);
}
g_string_append (string, ")");
}
else
{
g_string_append (string, "scale3d(");
_gtk_css_value_print (transform->scale.x, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->scale.y, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->scale.z, string);
g_string_append (string, ")");
}
break;
case GTK_CSS_TRANSFORM_SKEW:
g_string_append (string, "skew(");
_gtk_css_value_print (transform->skew.x, string);
g_string_append (string, ", ");
_gtk_css_value_print (transform->skew.y, string);
g_string_append (string, ")");
break;
case GTK_CSS_TRANSFORM_SKEW_X:
g_string_append (string, "skewX(");
_gtk_css_value_print (transform->skew_x.skew, string);
g_string_append (string, ")");
break;
case GTK_CSS_TRANSFORM_SKEW_Y:
g_string_append (string, "skewY(");
_gtk_css_value_print (transform->skew_y.skew, string);
g_string_append (string, ")");
break;
case GTK_CSS_TRANSFORM_NONE:
default:
g_assert_not_reached ();
break;
}
}
static void
gtk_css_value_transform_print (const GtkCssValue *value,
GString *string)
{
guint i;
if (gtk_css_transform_value_is_none (value))
{
g_string_append (string, "none");
return;
}
for (i = 0; i < value->n_transforms; i++)
{
if (i > 0)
g_string_append_c (string, ' ');
gtk_css_transform_print (&value->transforms[i], string);
}
}
static const GtkCssValueClass GTK_CSS_VALUE_TRANSFORM = {
gtk_css_value_transform_free,
gtk_css_value_transform_compute,
gtk_css_value_transform_equal,
gtk_css_value_transform_transition,
gtk_css_value_transform_print
};
static GtkCssValue none_singleton = { &GTK_CSS_VALUE_TRANSFORM, 1, 0, { { GTK_CSS_TRANSFORM_NONE } } };
static GtkCssValue *
gtk_css_transform_value_alloc (guint n_transforms)
{
GtkCssValue *result;
g_return_val_if_fail (n_transforms > 0, NULL);
result = _gtk_css_value_alloc (&GTK_CSS_VALUE_TRANSFORM, sizeof (GtkCssValue) + sizeof (GtkCssTransform) * (n_transforms - 1));
result->n_transforms = n_transforms;
return result;
}
GtkCssValue *
_gtk_css_transform_value_new_none (void)
{
return _gtk_css_value_ref (&none_singleton);
}
static gboolean
gtk_css_transform_value_is_none (const GtkCssValue *value)
{
return value->n_transforms == 0;
}
static gboolean
gtk_css_transform_parse (GtkCssTransform *transform,
GtkCssParser *parser)
{
if (_gtk_css_parser_try (parser, "matrix(", TRUE))
{
double xx, xy, x0, yx, yy, y0;
transform->type = GTK_CSS_TRANSFORM_MATRIX;
/* FIXME: Improve error handling here */
if (!_gtk_css_parser_try_double (parser, &xx)
|| !_gtk_css_parser_try (parser, ",", TRUE)
|| !_gtk_css_parser_try_double (parser, &xy)
|| !_gtk_css_parser_try (parser, ",", TRUE)
|| !_gtk_css_parser_try_double (parser, &x0)
|| !_gtk_css_parser_try (parser, ",", TRUE)
|| !_gtk_css_parser_try_double (parser, &yx)
|| !_gtk_css_parser_try (parser, ",", TRUE)
|| !_gtk_css_parser_try_double (parser, &yy)
|| !_gtk_css_parser_try (parser, ",", TRUE)
|| !_gtk_css_parser_try_double (parser, &y0))
{
_gtk_css_parser_error (parser, "invalid syntax for matrix()");
return FALSE;
}
graphene_matrix_init_from_2d (&transform->matrix.matrix,
xx, yx, xy, yy, x0, y0);
}
else if (_gtk_css_parser_try (parser, "matrix3d(", TRUE))
{
float f[16];
double d;
guint i;
transform->type = GTK_CSS_TRANSFORM_MATRIX;
for (i = 0; i < 16; i++)
{
if (!_gtk_css_parser_try_double (parser, &d))
break;
f[i] = d;
if (i < 15 && !_gtk_css_parser_try (parser, ",", TRUE))
break;
}
if (i < 16)
{
/* FIXME: Improve error handling here */
_gtk_css_parser_error (parser, "invalid syntax for matrix3d()");
return FALSE;
}
graphene_matrix_init_from_float (&transform->matrix.matrix, f);
}
else if (_gtk_css_parser_try (parser, "translate(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_TRANSLATE;
transform->translate.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.x == NULL)
return FALSE;
if (_gtk_css_parser_try (parser, ",", TRUE))
{
transform->translate.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.y == NULL)
{
_gtk_css_value_unref (transform->translate.x);
return FALSE;
}
}
else
{
transform->translate.y = _gtk_css_number_value_new (0, GTK_CSS_PX);
}
transform->translate.z = _gtk_css_number_value_new (0, GTK_CSS_PX);
}
else if (_gtk_css_parser_try (parser, "translateX(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_TRANSLATE;
transform->translate.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.x == NULL)
return FALSE;
transform->translate.y = _gtk_css_number_value_new (0, GTK_CSS_PX);
transform->translate.z = _gtk_css_number_value_new (0, GTK_CSS_PX);
}
else if (_gtk_css_parser_try (parser, "translateY(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_TRANSLATE;
transform->translate.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.y == NULL)
return FALSE;
transform->translate.x = _gtk_css_number_value_new (0, GTK_CSS_PX);
transform->translate.z = _gtk_css_number_value_new (0, GTK_CSS_PX);
}
else if (_gtk_css_parser_try (parser, "translateZ(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_TRANSLATE;
transform->translate.z = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.z == NULL)
return FALSE;
transform->translate.x = _gtk_css_number_value_new (0, GTK_CSS_PX);
transform->translate.y = _gtk_css_number_value_new (0, GTK_CSS_PX);
}
else if (_gtk_css_parser_try (parser, "translate3d(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_TRANSLATE;
transform->translate.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.x != NULL)
{
transform->translate.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.y != NULL)
{
transform->translate.z = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH);
if (transform->translate.z != NULL)
goto out;
}
_gtk_css_value_unref (transform->translate.y);
}
_gtk_css_value_unref (transform->translate.x);
return FALSE;
}
else if (_gtk_css_parser_try (parser, "scale(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SCALE;
transform->scale.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.x == NULL)
return FALSE;
if (_gtk_css_parser_try (parser, ",", TRUE))
{
transform->scale.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.y == NULL)
{
_gtk_css_value_unref (transform->scale.x);
return FALSE;
}
}
else
{
transform->scale.y = _gtk_css_value_ref (transform->scale.x);
}
transform->scale.z = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "scaleX(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SCALE;
transform->scale.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.x == NULL)
return FALSE;
transform->scale.y = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->scale.z = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "scaleY(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SCALE;
transform->scale.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.y == NULL)
return FALSE;
transform->scale.x = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->scale.z = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "scaleZ(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SCALE;
transform->scale.z = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.z == NULL)
return FALSE;
transform->scale.x = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->scale.y = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "scale3d(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SCALE;
transform->scale.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.x != NULL)
{
transform->scale.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.y != NULL)
{
transform->scale.z = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->scale.z != NULL)
goto out;
}
_gtk_css_value_unref (transform->scale.y);
}
_gtk_css_value_unref (transform->scale.x);
return FALSE;
}
else if (_gtk_css_parser_try (parser, "rotate(", TRUE) ||
_gtk_css_parser_try (parser, "rotateZ(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_ROTATE;
transform->rotate.angle = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->rotate.angle == NULL)
return FALSE;
transform->rotate.x = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.y = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.z = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "rotateX(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_ROTATE;
transform->rotate.angle = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->rotate.angle == NULL)
return FALSE;
transform->rotate.x = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->rotate.y = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.z = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "rotateY(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_ROTATE;
transform->rotate.angle = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->rotate.angle == NULL)
return FALSE;
transform->rotate.x = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
transform->rotate.y = _gtk_css_number_value_new (1, GTK_CSS_NUMBER);
transform->rotate.z = _gtk_css_number_value_new (0, GTK_CSS_NUMBER);
}
else if (_gtk_css_parser_try (parser, "rotate3d(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_ROTATE;
transform->rotate.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->rotate.x != NULL)
{
transform->rotate.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->rotate.y != NULL)
{
transform->rotate.z = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_NUMBER);
if (transform->rotate.z != NULL)
{
transform->rotate.angle = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->rotate.angle != NULL)
goto out;
}
_gtk_css_value_unref (transform->rotate.z);
}
_gtk_css_value_unref (transform->rotate.y);
}
_gtk_css_value_unref (transform->rotate.x);
return FALSE;
}
else if (_gtk_css_parser_try (parser, "skew(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SKEW;
transform->skew.x = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->skew.x == NULL)
return FALSE;
if (_gtk_css_parser_try (parser, ",", TRUE))
{
transform->skew.y = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->skew.y == NULL)
{
_gtk_css_value_unref (transform->skew.x);
return FALSE;
}
}
else
{
transform->skew.y = _gtk_css_number_value_new (0, GTK_CSS_DEG);
}
}
else if (_gtk_css_parser_try (parser, "skewX(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SKEW_X;
transform->skew_x.skew = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->skew_x.skew == NULL)
return FALSE;
}
else if (_gtk_css_parser_try (parser, "skewY(", TRUE))
{
transform->type = GTK_CSS_TRANSFORM_SKEW_Y;
transform->skew_y.skew = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (transform->skew_y.skew == NULL)
return FALSE;
}
else
{
_gtk_css_parser_error (parser, "unknown syntax for transform");
return FALSE;
}
out:
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
gtk_css_transform_clear (transform);
_gtk_css_parser_error (parser, "Expected closing ')'");
return FALSE;
}
return TRUE;
}
GtkCssValue *
_gtk_css_transform_value_parse (GtkCssParser *parser)
{
GtkCssValue *value;
GArray *array;
guint i;
if (_gtk_css_parser_try (parser, "none", TRUE))
return _gtk_css_transform_value_new_none ();
array = g_array_new (FALSE, FALSE, sizeof (GtkCssTransform));
do {
GtkCssTransform transform;
if (!gtk_css_transform_parse (&transform, parser))
{
for (i = 0; i < array->len; i++)
{
gtk_css_transform_clear (&g_array_index (array, GtkCssTransform, i));
}
g_array_free (array, TRUE);
return NULL;
}
g_array_append_val (array, transform);
} while (!_gtk_css_parser_begins_with (parser, ';'));
value = gtk_css_transform_value_alloc (array->len);
memcpy (value->transforms, array->data, sizeof (GtkCssTransform) * array->len);
g_array_free (array, TRUE);
return value;
}
gboolean
gtk_css_transform_value_get_matrix (const GtkCssValue *transform,
graphene_matrix_t *matrix)
{
graphene_matrix_t invert;
g_return_val_if_fail (transform->class == &GTK_CSS_VALUE_TRANSFORM, FALSE);
g_return_val_if_fail (matrix != NULL, FALSE);
gtk_css_transform_value_compute_matrix (transform, matrix);
return graphene_matrix_inverse (matrix, &invert);
}
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