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gtk2/gsk/gskrendernodeparser.c

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/*
* Copyright © 2019 Benjamin Otte
* Timm Bäder
*
* 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 2.1 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/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
* Timm Bäder <mail@baedert.org>
*/
#include "config.h"
#include "gskrendernodeparserprivate.h"
#include "gskroundedrectprivate.h"
#include "gskrendernodeprivate.h"
#include "gsktransformprivate.h"
#include "gdk/gdkrgbaprivate.h"
#include "gdk/gdktextureprivate.h"
#include <gtk/css/gtkcss.h>
#include "gtk/css/gtkcssdataurlprivate.h"
#include "gtk/css/gtkcssparserprivate.h"
#ifdef CAIRO_HAS_SCRIPT_SURFACE
#include <cairo-script.h>
#endif
#ifdef HAVE_CAIRO_SCRIPT_INTERPRETER
#include <cairo-script-interpreter.h>
#endif
typedef struct _Declaration Declaration;
struct _Declaration
{
const char *name;
gboolean (* parse_func) (GtkCssParser *parser, gpointer result);
void (* clear_func) (gpointer data);
gpointer result;
};
static gboolean
parse_rect (GtkCssParser *parser,
gpointer out_rect)
{
double numbers[4];
if (!gtk_css_parser_consume_number (parser, &numbers[0]) ||
!gtk_css_parser_consume_number (parser, &numbers[1]) ||
!gtk_css_parser_consume_number (parser, &numbers[2]) ||
!gtk_css_parser_consume_number (parser, &numbers[3]))
return FALSE;
graphene_rect_init (out_rect, numbers[0], numbers[1], numbers[2], numbers[3]);
return TRUE;
}
static gboolean
parse_texture (GtkCssParser *parser,
gpointer out_data)
{
GdkTexture *texture;
GError *error = NULL;
GtkCssLocation start_location;
char *url, *scheme;
start_location = *gtk_css_parser_get_start_location (parser);
url = gtk_css_parser_consume_url (parser);
if (url == NULL)
return FALSE;
scheme = g_uri_parse_scheme (url);
if (scheme && g_ascii_strcasecmp (scheme, "data") == 0)
{
GInputStream *stream;
GdkPixbuf *pixbuf;
GBytes *bytes;
texture = NULL;
bytes = gtk_css_data_url_parse (url, NULL, &error);
if (bytes)
{
stream = g_memory_input_stream_new_from_bytes (bytes);
g_bytes_unref (bytes);
pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, &error);
g_object_unref (stream);
if (pixbuf != NULL)
{
texture = gdk_texture_new_for_pixbuf (pixbuf);
g_object_unref (pixbuf);
}
}
}
else
{
GFile *file;
file = gtk_css_parser_resolve_url (parser, url);
if (file)
{
texture = gdk_texture_new_from_file (file, &error);
g_object_unref (file);
}
else
{
texture = NULL;
}
}
g_free (scheme);
g_free (url);
if (texture == NULL)
{
if (error)
{
gtk_css_parser_emit_error (parser,
&start_location,
gtk_css_parser_get_end_location (parser),
error);
g_clear_error (&error);
}
return FALSE;
}
*(GdkTexture **) out_data = texture;
return TRUE;
}
static void
clear_texture (gpointer inout_texture)
{
g_clear_object ((GdkTexture **) inout_texture);
}
static cairo_surface_t *
csi_hooks_surface_create (void *closure,
cairo_content_t content,
double width,
double height,
long uid)
{
return cairo_surface_create_similar (closure, content, width, height);
}
static const cairo_user_data_key_t csi_hooks_key;
static cairo_t *
csi_hooks_context_create (void *closure,
cairo_surface_t *surface)
{
cairo_t *cr = cairo_create (surface);
cairo_set_user_data (cr,
&csi_hooks_key,
cairo_surface_reference (surface),
(cairo_destroy_func_t) cairo_surface_destroy);
return cr;
}
static void
csi_hooks_context_destroy (void *closure,
void *ptr)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_get_user_data (ptr, &csi_hooks_key);
cr = cairo_create (closure);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
static gboolean
parse_script (GtkCssParser *parser,
gpointer out_data)
{
#ifdef HAVE_CAIRO_SCRIPT_INTERPRETER
GError *error = NULL;
GBytes *bytes;
GtkCssLocation start_location;
char *url, *scheme;
cairo_script_interpreter_t *csi;
cairo_script_interpreter_hooks_t hooks = {
.surface_create = csi_hooks_surface_create,
.context_create = csi_hooks_context_create,
.context_destroy = csi_hooks_context_destroy,
};
start_location = *gtk_css_parser_get_start_location (parser);
url = gtk_css_parser_consume_url (parser);
if (url == NULL)
return FALSE;
scheme = g_uri_parse_scheme (url);
if (scheme && g_ascii_strcasecmp (scheme, "data") == 0)
{
bytes = gtk_css_data_url_parse (url, NULL, &error);
}
else
{
GFile *file;
file = gtk_css_parser_resolve_url (parser, url);
bytes = g_file_load_bytes (file, NULL, NULL, &error);
g_object_unref (file);
}
g_free (scheme);
g_free (url);
if (bytes == NULL)
{
gtk_css_parser_emit_error (parser,
&start_location,
gtk_css_parser_get_end_location (parser),
error);
g_clear_error (&error);
return FALSE;
}
hooks.closure = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL);
csi = cairo_script_interpreter_create ();
cairo_script_interpreter_install_hooks (csi, &hooks);
cairo_script_interpreter_feed_string (csi, g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes));
g_bytes_unref (bytes);
if (cairo_surface_status (hooks.closure) != CAIRO_STATUS_SUCCESS)
{
gtk_css_parser_error_value (parser, "Invalid Cairo script: %s", cairo_status_to_string (cairo_surface_status (hooks.closure)));
cairo_script_interpreter_destroy (csi);
return FALSE;
}
if (cairo_script_interpreter_destroy (csi) != CAIRO_STATUS_SUCCESS)
{
gtk_css_parser_error_value (parser, "Invalid Cairo script");
cairo_surface_destroy (hooks.closure);
return FALSE;
}
*(cairo_surface_t **) out_data = hooks.closure;
return TRUE;
#else
gtk_css_parser_warn (parser,
GTK_CSS_PARSER_WARNING_UNIMPLEMENTED,
gtk_css_parser_get_block_location (parser),
gtk_css_parser_get_start_location (parser),
"GTK was compiled with script interpreter support. Using fallback pixel data for Cairo node.");
*(cairo_surface_t **) out_data = NULL;
return TRUE;
#endif
}
static void
clear_surface (gpointer inout_surface)
{
g_clear_pointer ((cairo_surface_t **) inout_surface, cairo_surface_destroy);
}
static gboolean
parse_rounded_rect (GtkCssParser *parser,
gpointer out_rect)
{
graphene_rect_t r;
graphene_size_t corners[4];
double d;
guint i;
if (!parse_rect (parser, &r))
return FALSE;
if (!gtk_css_parser_try_delim (parser, '/'))
{
gsk_rounded_rect_init_from_rect (out_rect, &r, 0);
return TRUE;
}
for (i = 0; i < 4; i++)
{
if (!gtk_css_parser_has_number (parser))
break;
if (!gtk_css_parser_consume_number (parser, &d))
return FALSE;
corners[i].width = d;
}
if (i == 0)
{
gtk_css_parser_error_syntax (parser, "Expected a number");
return FALSE;
}
/* The magic (i - 1) >> 1 below makes it take the correct value
* according to spec. Feel free to check the 4 cases
*/
for (; i < 4; i++)
corners[i].width = corners[(i - 1) >> 1].width;
if (gtk_css_parser_try_delim (parser, '/'))
{
gtk_css_parser_consume_token (parser);
for (i = 0; i < 4; i++)
{
if (!gtk_css_parser_has_number (parser))
break;
if (!gtk_css_parser_consume_number (parser, &d))
return FALSE;
corners[i].height = d;
}
if (i == 0)
{
gtk_css_parser_error_syntax (parser, "Expected a number");
return FALSE;
}
for (; i < 4; i++)
corners[i].height = corners[(i - 1) >> 1].height;
}
else
{
for (i = 0; i < 4; i++)
corners[i].height = corners[i].width;
}
gsk_rounded_rect_init (out_rect, &r, &corners[0], &corners[1], &corners[2], &corners[3]);
return TRUE;
}
static gboolean
parse_color (GtkCssParser *parser,
gpointer out_color)
{
return gdk_rgba_parser_parse (parser, out_color);
}
static gboolean
parse_double (GtkCssParser *parser,
gpointer out_double)
{
return gtk_css_parser_consume_number (parser, out_double);
}
static gboolean
parse_point (GtkCssParser *parser,
gpointer out_point)
{
double x, y;
if (!gtk_css_parser_consume_number (parser, &x) ||
!gtk_css_parser_consume_number (parser, &y))
return FALSE;
graphene_point_init (out_point, x, y);
return TRUE;
}
static gboolean
parse_transform (GtkCssParser *parser,
gpointer out_transform)
{
GskTransform *transform;
if (!gsk_transform_parser_parse (parser, &transform))
{
gsk_transform_unref (transform);
return FALSE;
}
*(GskTransform **) out_transform = transform;
return TRUE;
}
static void
clear_transform (gpointer inout_transform)
{
g_clear_pointer ((GskTransform **) inout_transform, gsk_transform_unref);
}
static gboolean
parse_string (GtkCssParser *parser,
gpointer out_string)
{
const GtkCssToken *token;
char *s;
token = gtk_css_parser_get_token (parser);
if (!gtk_css_token_is (token, GTK_CSS_TOKEN_STRING))
return FALSE;
s = g_strdup (token->string.string);
gtk_css_parser_consume_token (parser);
g_free (*(char **) out_string);
*(char **) out_string = s;
return TRUE;
}
static void
clear_string (gpointer inout_string)
{
g_clear_pointer ((char **) inout_string, g_free);
}
static gboolean
parse_stops (GtkCssParser *parser,
gpointer out_stops)
{
GArray *stops;
GskColorStop stop;
stops = g_array_new (FALSE, FALSE, sizeof (GskColorStop));
for (;;)
{
if (!gtk_css_parser_consume_number (parser, &stop.offset))
goto error;
if (!gdk_rgba_parser_parse (parser, &stop.color))
goto error;
if (stops->len == 0 && stop.offset < 0)
gtk_css_parser_error_value (parser, "Color stop offset must be >= 0");
else if (stops->len > 0 && stop.offset < g_array_index (stops, GskColorStop, stops->len - 1).offset)
gtk_css_parser_error_value (parser, "Color stop offset must be >= previous value");
else if (stop.offset > 1)
gtk_css_parser_error_value (parser, "Color stop offset must be <= 1");
else
g_array_append_val (stops, stop);
if (gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_COMMA))
gtk_css_parser_skip (parser);
else
break;
}
if (stops->len < 2)
{
gtk_css_parser_error_value (parser, "At least 2 color stops need to be specified");
g_array_free (stops, TRUE);
return FALSE;
}
if (*(GArray **) out_stops)
g_array_free (*(GArray **) out_stops, TRUE);
*(GArray **) out_stops = stops;
return TRUE;
error:
g_array_free (stops, TRUE);
return FALSE;
}
static void
clear_stops (gpointer inout_stops)
{
GArray **stops = (GArray **) inout_stops;
if (*stops)
{
g_array_free (*stops, TRUE);
*stops = NULL;
}
}
static gboolean
parse_float4 (GtkCssParser *parser,
gpointer out_floats)
{
float *floats = (float *) out_floats;
double d[4];
int i;
for (i = 0; i < 4 && !gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF); i ++)
{
if (!gtk_css_parser_consume_number (parser, &d[i]))
return FALSE;
}
if (i == 0)
{
gtk_css_parser_error_syntax (parser, "Expected a color");
return FALSE;
}
for (; i < 4; i++)
{
d[i] = d[(i - 1) >> 1];
}
for (i = 0; i < 4; i++)
{
floats[i] = d[i];
}
return TRUE;
}
static gboolean
parse_colors4 (GtkCssParser *parser,
gpointer out_colors)
{
GdkRGBA colors[4];
int i;
for (i = 0; i < 4 && !gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF); i ++)
{
if (!gdk_rgba_parser_parse (parser, &colors[i]))
return FALSE;
}
if (i == 0)
{
gtk_css_parser_error_syntax (parser, "Expected a color");
return FALSE;
}
for (; i < 4; i++)
{
colors[i] = colors[(i - 1) >> 1];
}
memcpy (out_colors, colors, sizeof (GdkRGBA) * 4);
return TRUE;
}
static gboolean
parse_shadows (GtkCssParser *parser,
gpointer out_shadows)
{
GArray *shadows = out_shadows;
do
{
GskShadow shadow = { GDK_RGBA("000000"), 0, 0, 0 };
double dx = 0, dy = 0, radius = 0;
if (!gdk_rgba_parser_parse (parser, &shadow.color))
gtk_css_parser_error_value (parser, "Expected shadow color");
if (!gtk_css_parser_consume_number (parser, &dx))
gtk_css_parser_error_value (parser, "Expected shadow x offset");
if (!gtk_css_parser_consume_number (parser, &dy))
gtk_css_parser_error_value (parser, "Expected shadow y offset");
if (gtk_css_parser_has_number (parser))
{
if (!gtk_css_parser_consume_number (parser, &radius))
gtk_css_parser_error_value (parser, "Expected shadow blur radius");
}
shadow.dx = dx;
shadow.dy = dy;
shadow.radius = radius;
g_array_append_val (shadows, shadow);
}
while (gtk_css_parser_try_token (parser, GTK_CSS_TOKEN_COMMA));
return TRUE;
}
static void
clear_shadows (gpointer inout_shadows)
{
g_array_set_size (*(GArray **) inout_shadows, 0);
}
static const struct
{
GskBlendMode mode;
const char *name;
} blend_modes[] = {
{ GSK_BLEND_MODE_DEFAULT, "normal" },
{ GSK_BLEND_MODE_MULTIPLY, "multiply" },
{ GSK_BLEND_MODE_SCREEN, "screen" },
{ GSK_BLEND_MODE_OVERLAY, "overlay" },
{ GSK_BLEND_MODE_DARKEN, "darken" },
{ GSK_BLEND_MODE_LIGHTEN, "lighten" },
{ GSK_BLEND_MODE_COLOR_DODGE, "color-dodge" },
{ GSK_BLEND_MODE_COLOR_BURN, "color-burn" },
{ GSK_BLEND_MODE_HARD_LIGHT, "hard-light" },
{ GSK_BLEND_MODE_SOFT_LIGHT, "soft-light" },
{ GSK_BLEND_MODE_DIFFERENCE, "difference" },
{ GSK_BLEND_MODE_EXCLUSION, "exclusion" },
{ GSK_BLEND_MODE_COLOR, "color" },
{ GSK_BLEND_MODE_HUE, "hue" },
{ GSK_BLEND_MODE_SATURATION, "saturation" },
{ GSK_BLEND_MODE_LUMINOSITY, "luminosity" }
};
static gboolean
parse_blend_mode (GtkCssParser *parser,
gpointer out_mode)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (blend_modes); i++)
{
if (gtk_css_parser_try_ident (parser, blend_modes[i].name))
{
*(GskBlendMode *) out_mode = blend_modes[i].mode;
return TRUE;
}
}
return FALSE;
}
static PangoFont *
font_from_string (const char *string)
{
PangoFontDescription *desc;
PangoFontMap *font_map;
PangoContext *context;
PangoFont *font;
desc = pango_font_description_from_string (string);
font_map = pango_cairo_font_map_get_default ();
context = pango_font_map_create_context (font_map);
font = pango_font_map_load_font (font_map, context, desc);
pango_font_description_free (desc);
g_object_unref (context);
return font;
}
#define MIN_ASCII_GLYPH 32
#define MAX_ASCII_GLYPH 127 /* exclusive */
#define N_ASCII_GLYPHS (MAX_ASCII_GLYPH - MIN_ASCII_GLYPH)
static PangoGlyphString *
create_ascii_glyphs (PangoFont *font)
{
PangoLanguage *language = pango_language_from_string ("en_US"); /* just pick one */
PangoCoverage *coverage;
PangoAnalysis not_a_hack = {
.shape_engine = NULL, /* unused */
.lang_engine = NULL, /* unused by pango_shape() */
.font = font,
.level = 0,
.gravity = PANGO_GRAVITY_SOUTH,
.flags = 0,
.script = PANGO_SCRIPT_COMMON,
.language = language,
.extra_attrs = NULL
};
PangoGlyphString *result, *glyph_string;
guint i;
coverage = pango_font_get_coverage (font, language);
for (i = MIN_ASCII_GLYPH; i < MAX_ASCII_GLYPH; i++)
{
if (!pango_coverage_get (coverage, i))
break;
}
pango_coverage_unref (coverage);
if (i < MAX_ASCII_GLYPH)
return NULL;
result = pango_glyph_string_new ();
pango_glyph_string_set_size (result, N_ASCII_GLYPHS);
glyph_string = pango_glyph_string_new ();
for (i = MIN_ASCII_GLYPH; i < MAX_ASCII_GLYPH; i++)
{
pango_shape ((char[2]) { i, 0 },
1,
&not_a_hack,
glyph_string);
if (glyph_string->num_glyphs != 1)
{
pango_glyph_string_free (glyph_string);
pango_glyph_string_free (result);
return NULL;
}
result->glyphs[i - MIN_ASCII_GLYPH] = glyph_string->glyphs[0];
}
pango_glyph_string_free (glyph_string);
return result;
}
static gboolean
parse_font (GtkCssParser *parser,
gpointer out_font)
{
PangoFont *font;
char *s;
s = gtk_css_parser_consume_string (parser);
if (s == NULL)
return FALSE;
font = font_from_string (s);
if (font == NULL)
{
gtk_css_parser_error_syntax (parser, "This font does not exist.");
return FALSE;
}
*((PangoFont**)out_font) = font;
g_free (s);
return TRUE;
}
static void
clear_font (gpointer inout_font)
{
g_clear_object ((PangoFont **) inout_font);
}
static gboolean
parse_glyphs (GtkCssParser *parser,
gpointer out_glyphs)
{
PangoGlyphString *glyph_string;
glyph_string = pango_glyph_string_new ();
do
{
PangoGlyphInfo gi = { 0, { 0, 0, 0}, { 1 } };
double d, d2;
int i;
if (gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_STRING))
{
char *s = gtk_css_parser_consume_string (parser);
for (i = 0; s[i] != 0; i++)
{
if (s[i] < MIN_ASCII_GLYPH || s[i] >= MAX_ASCII_GLYPH)
{
gtk_css_parser_error_value (parser, "Unsupported character %d in string", i);
}
gi.glyph = PANGO_GLYPH_INVALID_INPUT - MAX_ASCII_GLYPH + s[i];
pango_glyph_string_set_size (glyph_string, glyph_string->num_glyphs + 1);
glyph_string->glyphs[glyph_string->num_glyphs - 1] = gi;
}
g_free (s);
}
else
{
if (!gtk_css_parser_consume_integer (parser, &i) ||
!gtk_css_parser_consume_number (parser, &d))
{
pango_glyph_string_free (glyph_string);
return FALSE;
}
gi.glyph = i;
gi.geometry.width = (int) (d * PANGO_SCALE);
if (gtk_css_parser_has_number (parser))
{
if (!gtk_css_parser_consume_number (parser, &d) ||
!gtk_css_parser_consume_number (parser, &d2))
{
pango_glyph_string_free (glyph_string);
return FALSE;
}
gi.geometry.x_offset = (int) (d * PANGO_SCALE);
gi.geometry.y_offset = (int) (d2 * PANGO_SCALE);
if (gtk_css_parser_try_ident (parser, "same-cluster"))
gi.attr.is_cluster_start = 0;
else
gi.attr.is_cluster_start = 1;
}
pango_glyph_string_set_size (glyph_string, glyph_string->num_glyphs + 1);
glyph_string->glyphs[glyph_string->num_glyphs - 1] = gi;
}
}
while (gtk_css_parser_try_token (parser, GTK_CSS_TOKEN_COMMA));
*((PangoGlyphString **)out_glyphs) = glyph_string;
return TRUE;
}
static void
clear_glyphs (gpointer inout_glyphs)
{
g_clear_pointer ((PangoGlyphString **) inout_glyphs, pango_glyph_string_free);
}
static gboolean
parse_node (GtkCssParser *parser, gpointer out_node);
static void
clear_node (gpointer inout_node)
{
g_clear_pointer ((GskRenderNode **) inout_node, gsk_render_node_unref);
}
static GskRenderNode *
parse_container_node (GtkCssParser *parser)
{
GskRenderNode *node;
GPtrArray *nodes;
const GtkCssToken *token;
nodes = g_ptr_array_new_with_free_func ((GDestroyNotify) gsk_render_node_unref);
for (token = gtk_css_parser_get_token (parser);
!gtk_css_token_is (token, GTK_CSS_TOKEN_EOF);
token = gtk_css_parser_get_token (parser))
{
node = NULL;
/* We don't want a semicolon here, but the parse_node function will figure
* that out itself and return an error if we encounter one.
*/
gtk_css_parser_start_semicolon_block (parser, GTK_CSS_TOKEN_OPEN_CURLY);
if (parse_node (parser, &node))
g_ptr_array_add (nodes, node);
gtk_css_parser_end_block (parser);
}
node = gsk_container_node_new ((GskRenderNode **) nodes->pdata, nodes->len);
g_ptr_array_unref (nodes);
return node;
}
static guint
parse_declarations (GtkCssParser *parser,
const Declaration *declarations,
guint n_declarations)
{
guint parsed = 0;
guint i;
g_assert (n_declarations < 8 * sizeof (guint));
while (!gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF))
{
gtk_css_parser_start_semicolon_block (parser, GTK_CSS_TOKEN_OPEN_CURLY);
for (i = 0; i < n_declarations; i++)
{
if (gtk_css_parser_try_ident (parser, declarations[i].name))
{
if (!gtk_css_parser_try_token (parser, GTK_CSS_TOKEN_COLON))
{
gtk_css_parser_error_syntax (parser, "Expected ':' after variable declaration");
}
else
{
if (parsed & (1 << i))
{
gtk_css_parser_warn_syntax (parser, "Variable \"%s\" defined multiple times", declarations[i].name);
/* Unset, just to be sure */
parsed &= ~(1 << i);
if (declarations[i].clear_func)
declarations[i].clear_func (declarations[i].result);
}
if (!declarations[i].parse_func (parser, declarations[i].result))
{
/* nothing to do */
}
else if (!gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF))
{
gtk_css_parser_error_syntax (parser, "Expected ';' at end of statement");
if (declarations[i].clear_func)
declarations[i].clear_func (declarations[i].result);
}
else
{
parsed |= (1 << i);
}
}
break;
}
}
if (i == n_declarations)
{
if (gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_IDENT))
gtk_css_parser_error_syntax (parser, "No variable named \"%s\"",
gtk_css_parser_get_token (parser)->string.string);
else
gtk_css_parser_error_syntax (parser, "Expected a variable name");
}
gtk_css_parser_end_block (parser);
}
return parsed;
}
static GdkTexture *
create_default_texture (void)
{
static const guint32 pixels[100] = {
0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0, 0, 0, 0, 0,
0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0, 0, 0, 0, 0,
0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0, 0, 0, 0, 0,
0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0, 0, 0, 0, 0,
0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC,
0, 0, 0, 0, 0, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC,
0, 0, 0, 0, 0, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC,
0, 0, 0, 0, 0, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC,
0, 0, 0, 0, 0, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC, 0xFFFF00CC };
GBytes *bytes;
GdkTexture *texture;
bytes = g_bytes_new_static ((guchar *) pixels, 400);
texture = gdk_memory_texture_new (10, 10, GDK_MEMORY_DEFAULT, bytes, 40);
g_bytes_unref (bytes);
return texture;
}
static GskRenderNode *
create_default_render_node (void)
{
return gsk_color_node_new (&GDK_RGBA("FF00CC"), &GRAPHENE_RECT_INIT (0, 0, 50, 50));
}
static GskRenderNode *
parse_color_node (GtkCssParser *parser)
{
graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 50, 50);
GdkRGBA color = GDK_RGBA("FF00CC");
const Declaration declarations[] = {
{ "bounds", parse_rect, NULL, &bounds },
{ "color", parse_color, NULL, &color },
};
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
return gsk_color_node_new (&color, &bounds);
}
static GskRenderNode *
parse_linear_gradient_node_internal (GtkCssParser *parser,
gboolean repeating)
{
graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 50, 50);
graphene_point_t start = GRAPHENE_POINT_INIT (0, 0);
graphene_point_t end = GRAPHENE_POINT_INIT (0, 50);
GArray *stops = NULL;
const Declaration declarations[] = {
{ "bounds", parse_rect, NULL, &bounds },
{ "start", parse_point, NULL, &start },
{ "end", parse_point, NULL, &end },
{ "stops", parse_stops, clear_stops, &stops },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (stops == NULL)
{
GskColorStop from = { 0.0, GDK_RGBA("AAFF00") };
GskColorStop to = { 1.0, GDK_RGBA("FF00CC") };
stops = g_array_new (FALSE, FALSE, sizeof (GskColorStop));
g_array_append_val (stops, from);
g_array_append_val (stops, to);
}
if (repeating)
result = gsk_repeating_linear_gradient_node_new (&bounds, &start, &end, (GskColorStop *) stops->data, stops->len);
else
result = gsk_linear_gradient_node_new (&bounds, &start, &end, (GskColorStop *) stops->data, stops->len);
g_array_free (stops, TRUE);
return result;
}
static GskRenderNode *
parse_linear_gradient_node (GtkCssParser *parser)
{
return parse_linear_gradient_node_internal (parser, FALSE);
}
static GskRenderNode *
parse_repeating_linear_gradient_node (GtkCssParser *parser)
{
return parse_linear_gradient_node_internal (parser, TRUE);
}
static GskRenderNode *
parse_inset_shadow_node (GtkCssParser *parser)
{
GskRoundedRect outline = GSK_ROUNDED_RECT_INIT (0, 0, 50, 50);
GdkRGBA color = GDK_RGBA("000000");
double dx = 1, dy = 1, blur = 0, spread = 0;
const Declaration declarations[] = {
{ "outline", parse_rounded_rect, NULL, &outline },
{ "color", parse_color, NULL, &color },
{ "dx", parse_double, NULL, &dx },
{ "dy", parse_double, NULL, &dy },
{ "spread", parse_double, NULL, &spread },
{ "blur", parse_double, NULL, &blur }
};
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
return gsk_inset_shadow_node_new (&outline, &color, dx, dy, spread, blur);
}
static GskRenderNode *
parse_border_node (GtkCssParser *parser)
{
GskRoundedRect outline = GSK_ROUNDED_RECT_INIT (0, 0, 50, 50);
float widths[4] = { 1, 1, 1, 1 };
GdkRGBA colors[4] = { GDK_RGBA("000"), GDK_RGBA("000"), GDK_RGBA("000"), GDK_RGBA("000") };
const Declaration declarations[] = {
{ "outline", parse_rounded_rect, NULL, &outline },
{ "widths", parse_float4, NULL, &widths },
{ "colors", parse_colors4, NULL, &colors }
};
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
return gsk_border_node_new (&outline, widths, colors);
}
static GskRenderNode *
parse_texture_node (GtkCssParser *parser)
{
graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 50, 50);
GdkTexture *texture = NULL;
const Declaration declarations[] = {
{ "bounds", parse_rect, NULL, &bounds },
{ "texture", parse_texture, clear_texture, &texture }
};
GskRenderNode *node;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (texture == NULL)
texture = create_default_texture ();
node = gsk_texture_node_new (texture, &bounds);
g_object_unref (texture);
return node;
}
static GskRenderNode *
parse_cairo_node (GtkCssParser *parser)
{
graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 50, 50);
GdkTexture *pixels = NULL;
cairo_surface_t *surface = NULL;
const Declaration declarations[] = {
{ "bounds", parse_rect, NULL, &bounds },
{ "pixels", parse_texture, clear_texture, &pixels },
{ "script", parse_script, clear_surface, &surface }
};
GskRenderNode *node;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
node = gsk_cairo_node_new (&bounds);
if (surface != NULL)
{
cairo_t *cr = gsk_cairo_node_get_draw_context (node);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
else if (pixels != NULL)
{
cairo_t *cr = gsk_cairo_node_get_draw_context (node);
surface = gdk_texture_download_surface (pixels);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
else
{
/* do nothing */
}
g_clear_object (&pixels);
g_clear_pointer (&surface, cairo_surface_destroy);
return node;
}
static GskRenderNode *
parse_outset_shadow_node (GtkCssParser *parser)
{
GskRoundedRect outline = GSK_ROUNDED_RECT_INIT (0, 0, 50, 50);
GdkRGBA color = GDK_RGBA("000000");
double dx = 1, dy = 1, blur = 0, spread = 0;
const Declaration declarations[] = {
{ "outline", parse_rounded_rect, NULL, &outline },
{ "color", parse_color, NULL, &color },
{ "dx", parse_double, NULL, &dx },
{ "dy", parse_double, NULL, &dy },
{ "spread", parse_double, NULL, &spread },
{ "blur", parse_double, NULL, &blur }
};
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
return gsk_outset_shadow_node_new (&outline, &color, dx, dy, spread, blur);
}
static GskRenderNode *
parse_transform_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
GskTransform *transform = NULL;
const Declaration declarations[] = {
{ "transform", parse_transform, clear_transform, &transform },
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
/* This is very much cheating, isn't it? */
if (transform == NULL)
transform = gsk_transform_new ();
result = gsk_transform_node_new (child, transform);
gsk_render_node_unref (child);
gsk_transform_unref (transform);
return result;
}
static GskRenderNode *
parse_opacity_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
double opacity = 0.5;
const Declaration declarations[] = {
{ "opacity", parse_double, NULL, &opacity },
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
result = gsk_opacity_node_new (child, opacity);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_color_matrix_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
graphene_matrix_t matrix;
GskTransform *transform = NULL;
graphene_rect_t offset_rect = GRAPHENE_RECT_INIT (0, 0, 0, 0);
graphene_vec4_t offset;
const Declaration declarations[] = {
{ "matrix", parse_transform, clear_transform, &transform },
{ "offset", parse_rect, NULL, &offset_rect },
{ "child", parse_node, clear_node, &child }
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
graphene_vec4_init (&offset,
offset_rect.origin.x, offset_rect.origin.y,
offset_rect.size.width, offset_rect.size.height);
gsk_transform_to_matrix (transform, &matrix);
result = gsk_color_matrix_node_new (child, &matrix, &offset);
gsk_transform_unref (transform);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_cross_fade_node (GtkCssParser *parser)
{
GskRenderNode *start = NULL;
GskRenderNode *end = NULL;
double progress = 0.5;
const Declaration declarations[] = {
{ "progress", parse_double, NULL, &progress },
{ "start", parse_node, clear_node, &start },
{ "end", parse_node, clear_node, &end },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (start == NULL)
start = gsk_color_node_new (&GDK_RGBA("AAFF00"), &GRAPHENE_RECT_INIT (0, 0, 50, 50));
if (end == NULL)
end = create_default_render_node ();
result = gsk_cross_fade_node_new (start, end, progress);
gsk_render_node_unref (start);
gsk_render_node_unref (end);
return result;
}
static GskRenderNode *
parse_blend_node (GtkCssParser *parser)
{
GskRenderNode *bottom = NULL;
GskRenderNode *top = NULL;
GskBlendMode mode = GSK_BLEND_MODE_DEFAULT;
const Declaration declarations[] = {
{ "mode", parse_blend_mode, NULL, &mode },
{ "bottom", parse_node, clear_node, &bottom },
{ "top", parse_node, clear_node, &top },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (bottom == NULL)
bottom = gsk_color_node_new (&GDK_RGBA("AAFF00"), &GRAPHENE_RECT_INIT (0, 0, 50, 50));
if (top == NULL)
top = create_default_render_node ();
result = gsk_blend_node_new (bottom, top, mode);
gsk_render_node_unref (bottom);
gsk_render_node_unref (top);
return result;
}
static GskRenderNode *
parse_repeat_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 0, 0);
graphene_rect_t child_bounds = GRAPHENE_RECT_INIT (0, 0, 0, 0);
const Declaration declarations[] = {
{ "child", parse_node, clear_node, &child },
{ "bounds", parse_rect, NULL, &bounds },
{ "child-bounds", parse_rect, NULL, &child_bounds },
};
GskRenderNode *result;
guint parse_result;
parse_result = parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
if (!(parse_result & (1 << 1)))
gsk_render_node_get_bounds (child, &bounds);
if (!(parse_result & (1 << 2)))
gsk_render_node_get_bounds (child, &child_bounds);
result = gsk_repeat_node_new (&bounds, child, &child_bounds);
gsk_render_node_unref (child);
return result;
}
static gboolean
unpack_glyphs (PangoFont *font,
PangoGlyphString *glyphs)
{
PangoGlyphString *ascii = NULL;
guint i;
for (i = 0; i < glyphs->num_glyphs; i++)
{
PangoGlyph glyph = glyphs->glyphs[i].glyph;
if (glyph < PANGO_GLYPH_INVALID_INPUT - MAX_ASCII_GLYPH ||
glyph >= PANGO_GLYPH_INVALID_INPUT)
continue;
glyph = glyph - (PANGO_GLYPH_INVALID_INPUT - MAX_ASCII_GLYPH) - MIN_ASCII_GLYPH;
if (ascii == NULL)
{
ascii = create_ascii_glyphs (font);
if (ascii == NULL)
return FALSE;
}
glyphs->glyphs[i].glyph = ascii->glyphs[glyph].glyph;
glyphs->glyphs[i].geometry.width = ascii->glyphs[glyph].geometry.width;
}
g_clear_pointer (&ascii, pango_glyph_string_free);
return TRUE;
}
static GskRenderNode *
parse_text_node (GtkCssParser *parser)
{
PangoFont *font = NULL;
graphene_point_t offset = GRAPHENE_POINT_INIT (0, 0);
GdkRGBA color = GDK_RGBA("000000");
PangoGlyphString *glyphs = NULL;
const Declaration declarations[] = {
{ "font", parse_font, clear_font, &font },
{ "offset", parse_point, NULL, &offset },
{ "color", parse_color, NULL, &color },
{ "glyphs", parse_glyphs, clear_glyphs, &glyphs }
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (font == NULL)
{
font = font_from_string ("Cantarell 11");
g_assert (font);
}
if (!glyphs)
{
const char *text = "Hello";
PangoGlyphInfo gi = { 0, { 0, 0, 0}, { 1 } };
guint i;
glyphs = pango_glyph_string_new ();
pango_glyph_string_set_size (glyphs, strlen (text));
for (i = 0; i < strlen (text); i++)
{
gi.glyph = PANGO_GLYPH_INVALID_INPUT - MAX_ASCII_GLYPH + text[i];
glyphs->glyphs[i] = gi;
}
}
if (!unpack_glyphs (font, glyphs))
{
gtk_css_parser_error_value (parser, "Given font cannot decode the glyph text");
result = NULL;
}
else
{
result = gsk_text_node_new (font, glyphs, &color, &offset);
if (result == NULL)
{
gtk_css_parser_error_value (parser, "Glyphs result in empty text");
}
}
g_object_unref (font);
pango_glyph_string_free (glyphs);
/* return anything, whatever, just not NULL */
if (result == NULL)
result = create_default_render_node ();
return result;
}
static GskRenderNode *
parse_blur_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
double blur_radius = 1.0;
const Declaration declarations[] = {
{ "blur", parse_double, NULL, &blur_radius },
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
result = gsk_blur_node_new (child, blur_radius);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_clip_node (GtkCssParser *parser)
{
GskRoundedRect clip = GSK_ROUNDED_RECT_INIT (0, 0, 50, 50);
GskRenderNode *child = NULL;
const Declaration declarations[] = {
{ "clip", parse_rounded_rect, NULL, &clip },
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
if (gsk_rounded_rect_is_rectilinear (&clip))
result = gsk_clip_node_new (child, &clip.bounds);
else
result = gsk_rounded_clip_node_new (child, &clip);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_rounded_clip_node (GtkCssParser *parser)
{
GskRoundedRect clip = GSK_ROUNDED_RECT_INIT (0, 0, 50, 50);
GskRenderNode *child = NULL;
const Declaration declarations[] = {
{ "clip", parse_rounded_rect, NULL, &clip },
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
result = gsk_rounded_clip_node_new (child, &clip);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_shadow_node (GtkCssParser *parser)
{
GskRenderNode *child = NULL;
GArray *shadows = g_array_new (FALSE, TRUE, sizeof (GskShadow));
const Declaration declarations[] = {
{ "child", parse_node, clear_node, &child },
{ "shadows", parse_shadows, clear_shadows, shadows }
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
if (shadows->len == 0)
{
GskShadow default_shadow = { GDK_RGBA("000000"), 1, 1, 0 };
g_array_append_val (shadows, default_shadow);
}
result = gsk_shadow_node_new (child, (GskShadow *)shadows->data, shadows->len);
g_array_free (shadows, TRUE);
gsk_render_node_unref (child);
return result;
}
static GskRenderNode *
parse_debug_node (GtkCssParser *parser)
{
char *message = NULL;
GskRenderNode *child = NULL;
const Declaration declarations[] = {
{ "message", parse_string, clear_string, &message},
{ "child", parse_node, clear_node, &child },
};
GskRenderNode *result;
parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
if (child == NULL)
child = create_default_render_node ();
result = gsk_debug_node_new (child, message);
gsk_render_node_unref (child);
return result;
}
static gboolean
parse_node (GtkCssParser *parser,
gpointer out_node)
{
static struct {
const char *name;
GskRenderNode * (* func) (GtkCssParser *);
} node_parsers[] = {
{ "blend", parse_blend_node },
{ "blur", parse_blur_node },
{ "border", parse_border_node },
{ "cairo", parse_cairo_node },
{ "clip", parse_clip_node },
{ "color", parse_color_node },
{ "color-matrix", parse_color_matrix_node },
{ "container", parse_container_node },
{ "cross-fade", parse_cross_fade_node },
{ "debug", parse_debug_node },
{ "inset-shadow", parse_inset_shadow_node },
{ "linear-gradient", parse_linear_gradient_node },
{ "opacity", parse_opacity_node },
{ "outset-shadow", parse_outset_shadow_node },
{ "repeat", parse_repeat_node },
{ "repeating-linear-gradient", parse_repeating_linear_gradient_node },
{ "rounded-clip", parse_rounded_clip_node },
{ "shadow", parse_shadow_node },
{ "text", parse_text_node },
{ "texture", parse_texture_node },
{ "transform", parse_transform_node },
};
GskRenderNode **node_p = out_node;
guint i;
for (i = 0; i < G_N_ELEMENTS (node_parsers); i++)
{
if (gtk_css_parser_try_ident (parser, node_parsers[i].name))
{
GskRenderNode *node;
if (!gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF))
{
gtk_css_parser_error_syntax (parser, "Expected '{' after node name");
return FALSE;
}
gtk_css_parser_end_block_prelude (parser);
node = node_parsers[i].func (parser);
if (node)
{
if (!gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_EOF))
gtk_css_parser_error_syntax (parser, "Expected '}' at end of node definition");
g_clear_pointer (node_p, gsk_render_node_unref);
*node_p = node;
}
return node != NULL;
}
}
if (gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_IDENT))
gtk_css_parser_error_value (parser, "\"%s\" is not a valid node name",
gtk_css_parser_get_token (parser)->string.string);
else
gtk_css_parser_error_syntax (parser, "Expected a node name");
return FALSE;
}
static void
gsk_render_node_parser_error (GtkCssParser *parser,
const GtkCssLocation *start,
const GtkCssLocation *end,
const GError *error,
gpointer user_data)
{
struct {
GskParseErrorFunc error_func;
gpointer user_data;
} *error_func_pair = user_data;
if (error_func_pair->error_func)
{
GtkCssSection *section = gtk_css_section_new (gtk_css_parser_get_file (parser), start, end);
error_func_pair->error_func (section, error, error_func_pair->user_data);
gtk_css_section_unref (section);
}
}
GskRenderNode *
gsk_render_node_deserialize_from_bytes (GBytes *bytes,
GskParseErrorFunc error_func,
gpointer user_data)
{
GskRenderNode *root = NULL;
GtkCssParser *parser;
struct {
GskParseErrorFunc error_func;
gpointer user_data;
} error_func_pair = { error_func, user_data };
parser = gtk_css_parser_new_for_bytes (bytes, NULL, NULL, gsk_render_node_parser_error,
&error_func_pair, NULL);
root = parse_container_node (parser);
if (root && gsk_container_node_get_n_children (root) == 1)
{
GskRenderNode *child = gsk_container_node_get_child (root, 0);
gsk_render_node_ref (child);
gsk_render_node_unref (root);
root = child;
}
gtk_css_parser_unref (parser);
return root;
}
typedef struct
{
int indentation_level;
GString *str;
} Printer;
static void
printer_init (Printer *self)
{
self->indentation_level = 0;
self->str = g_string_new (NULL);
}
#define IDENT_LEVEL 2 /* Spaces per level */
static void
_indent (Printer *self)
{
if (self->indentation_level > 0)
g_string_append_printf (self->str, "%*s", self->indentation_level * IDENT_LEVEL, " ");
}
#undef IDENT_LEVEL
static void
start_node (Printer *self,
const char *node_name)
{
g_string_append_printf (self->str, "%s {\n", node_name);
self->indentation_level ++;
}
static void
end_node (Printer *self)
{
self->indentation_level --;
_indent (self);
g_string_append (self->str, "}\n");
}
static void
string_append_double (GString *string,
double d)
{
char buf[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%g", d);
g_string_append (string, buf);
}
static void
append_rect (GString *str,
const graphene_rect_t *r)
{
string_append_double (str, r->origin.x);
g_string_append_c (str, ' ');
string_append_double (str, r->origin.y);
g_string_append_c (str, ' ');
string_append_double (str, r->size.width);
g_string_append_c (str, ' ');
string_append_double (str, r->size.height);
}
static void
append_rounded_rect (GString *str,
const GskRoundedRect *r)
{
append_rect (str, &r->bounds);
if (!gsk_rounded_rect_is_rectilinear (r))
{
gboolean all_the_same = TRUE;
gboolean all_square = TRUE;
float w = r->corner[0].width;
float h = r->corner[0].height;
int i;
for (i = 1; i < 4; i ++)
{
if (r->corner[i].width != w ||
r->corner[i].height != h)
all_the_same = FALSE;
if (r->corner[i].width != r->corner[i].height)
all_square = FALSE;
}
g_string_append (str, " / ");
if (all_the_same)
{
string_append_double (str, w);
}
else if (all_square)
{
string_append_double (str, r->corner[0].width);
g_string_append_c (str, ' ');
string_append_double (str, r->corner[1].width);
g_string_append_c (str, ' ');
string_append_double (str, r->corner[2].width);
g_string_append_c (str, ' ');
string_append_double (str, r->corner[3].width);
}
else
{
for (i = 0; i < 4; i ++)
{
string_append_double (str, r->corner[i].width);
g_string_append_c (str, ' ');
}
g_string_append (str, "/ ");
for (i = 0; i < 3; i ++)
{
string_append_double (str, r->corner[i].height);
g_string_append_c (str, ' ');
}
string_append_double (str, r->corner[3].height);
}
}
}
static void
append_rgba (GString *str,
const GdkRGBA *rgba)
{
char *rgba_str = gdk_rgba_to_string (rgba);
g_string_append (str, rgba_str);
g_free (rgba_str);
}
static void
append_point (GString *str,
const graphene_point_t *p)
{
string_append_double (str, p->x);
g_string_append_c (str, ' ');
string_append_double (str, p->y);
}
static void
append_vec4 (GString *str,
const graphene_vec4_t *v)
{
string_append_double (str, graphene_vec4_get_x (v));
g_string_append_c (str, ' ');
string_append_double (str, graphene_vec4_get_y (v));
g_string_append_c (str, ' ');
string_append_double (str, graphene_vec4_get_z (v));
g_string_append_c (str, ' ');
string_append_double (str, graphene_vec4_get_w (v));
}
static void
append_float_param (Printer *p,
const char *param_name,
float value,
float default_value)
{
/* Don't approximate-compare here, better be topo verbose */
if (value == default_value)
return;
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
string_append_double (p->str, value);
g_string_append (p->str, ";\n");
}
static void
append_rgba_param (Printer *p,
const char *param_name,
const GdkRGBA *value)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
append_rgba (p->str, value);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void
append_rect_param (Printer *p,
const char *param_name,
const graphene_rect_t *value)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
append_rect (p->str, value);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void
append_rounded_rect_param (Printer *p,
const char *param_name,
const GskRoundedRect *value)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
append_rounded_rect (p->str, value);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void
append_point_param (Printer *p,
const char *param_name,
const graphene_point_t *value)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
append_point (p->str, value);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void
append_vec4_param (Printer *p,
const char *param_name,
const graphene_vec4_t *value)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
append_vec4 (p->str, value);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void
append_matrix_param (Printer *p,
const char *param_name,
const graphene_matrix_t *value)
{
GskTransform *transform = NULL;
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
transform = gsk_transform_matrix (transform, value);
gsk_transform_print (transform,p->str);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
gsk_transform_unref (transform);
}
static void
append_transform_param (Printer *p,
const char *param_name,
GskTransform *transform)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
gsk_transform_print (transform, p->str);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
}
static void render_node_print (Printer *p,
GskRenderNode *node);
static void
append_node_param (Printer *p,
const char *param_name,
GskRenderNode *node)
{
_indent (p);
g_string_append_printf (p->str, "%s: ", param_name);
render_node_print (p, node);
}
static cairo_status_t
cairo_write_array (void *closure,
const unsigned char *data,
unsigned int length)
{
g_byte_array_append (closure, data, length);
return CAIRO_STATUS_SUCCESS;
}
static void
cairo_destroy_array (gpointer array)
{
g_byte_array_free (array, TRUE);
}
static void
render_node_print (Printer *p,
GskRenderNode *node)
{
switch (gsk_render_node_get_node_type (node))
{
case GSK_CONTAINER_NODE:
{
guint i;
start_node (p, "container");
for (i = 0; i < gsk_container_node_get_n_children (node); i ++)
{
GskRenderNode *child = gsk_container_node_get_child (node, i);
/* Only in container nodes do we want nodes to be indented. */
_indent (p);
render_node_print (p, child);
}
end_node (p);
}
break;
case GSK_COLOR_NODE:
{
start_node (p, "color");
append_rect_param (p, "bounds", &node->bounds);
append_rgba_param (p, "color", gsk_color_node_peek_color (node));
end_node (p);
}
break;
case GSK_CROSS_FADE_NODE:
{
start_node (p, "cross-fade");
append_node_param (p, "end", gsk_cross_fade_node_get_end_child (node));
append_float_param (p, "progress", gsk_cross_fade_node_get_progress (node), 0.5f);
append_node_param (p, "start", gsk_cross_fade_node_get_start_child (node));
end_node (p);
}
break;
case GSK_REPEATING_LINEAR_GRADIENT_NODE:
case GSK_LINEAR_GRADIENT_NODE:
{
const guint n_stops = gsk_linear_gradient_node_get_n_color_stops (node);
const GskColorStop *stops = gsk_linear_gradient_node_peek_color_stops (node);
int i;
if (gsk_render_node_get_node_type (node) == GSK_REPEATING_LINEAR_GRADIENT_NODE)
start_node (p, "repeating-linear-gradient");
else
start_node (p, "linear-gradient");
append_rect_param (p, "bounds", &node->bounds);
append_point_param (p, "end", gsk_linear_gradient_node_peek_end (node));
append_point_param (p, "start", gsk_linear_gradient_node_peek_start (node));
_indent (p);
g_string_append (p->str, "stops: ");
for (i = 0; i < n_stops; i ++)
{
if (i > 0)
g_string_append (p->str, ", ");
string_append_double (p->str, stops[i].offset);
g_string_append_c (p->str, ' ');
append_rgba (p->str, &stops[i].color);
}
g_string_append (p->str, ";\n");
end_node (p);
}
break;
case GSK_OPACITY_NODE:
{
start_node (p, "opacity");
append_node_param (p, "child", gsk_opacity_node_get_child (node));
append_float_param (p, "opacity", gsk_opacity_node_get_opacity (node), 0.5f);
end_node (p);
}
break;
case GSK_OUTSET_SHADOW_NODE:
{
const GdkRGBA *color = gsk_outset_shadow_node_peek_color (node);
start_node (p, "outset-shadow");
append_float_param (p, "blur", gsk_outset_shadow_node_get_blur_radius (node), 0.0f);
if (!gdk_rgba_equal (color, &GDK_RGBA("000")))
append_rgba_param (p, "color", color);
append_float_param (p, "dx", gsk_outset_shadow_node_get_dx (node), 1.0f);
append_float_param (p, "dy", gsk_outset_shadow_node_get_dy (node), 1.0f);
append_rounded_rect_param (p, "outline", gsk_outset_shadow_node_peek_outline (node));
append_float_param (p, "spread", gsk_outset_shadow_node_get_spread (node), 0.0f);
end_node (p);
}
break;
case GSK_CLIP_NODE:
{
start_node (p, "clip");
append_node_param (p, "child", gsk_clip_node_get_child (node));
append_rect_param (p, "clip", gsk_clip_node_peek_clip (node));
end_node (p);
}
break;
case GSK_ROUNDED_CLIP_NODE:
{
start_node (p, "rounded-clip");
append_node_param (p, "child", gsk_rounded_clip_node_get_child (node));
append_rounded_rect_param (p, "clip", gsk_rounded_clip_node_peek_clip (node));
end_node (p);
}
break;
case GSK_TRANSFORM_NODE:
{
GskTransform *transform = gsk_transform_node_get_transform (node);
start_node (p, "transform");
append_node_param (p, "child", gsk_transform_node_get_child (node));
if (gsk_transform_get_category (transform) != GSK_TRANSFORM_CATEGORY_IDENTITY)
append_transform_param (p, "transform", transform);
end_node (p);
}
break;
case GSK_COLOR_MATRIX_NODE:
{
start_node (p, "color-matrix");
append_node_param (p, "child", gsk_color_matrix_node_get_child (node));
if (!graphene_matrix_is_identity (gsk_color_matrix_node_peek_color_matrix (node)))
append_matrix_param (p, "matrix", gsk_color_matrix_node_peek_color_matrix (node));
if (!graphene_vec4_equal (gsk_color_matrix_node_peek_color_offset (node), graphene_vec4_zero ()))
append_vec4_param (p, "offset", gsk_color_matrix_node_peek_color_offset (node));
end_node (p);
}
break;
case GSK_BORDER_NODE:
{
const GdkRGBA *colors = gsk_border_node_peek_colors (node);
const float *widths = gsk_border_node_peek_widths (node);
guint i, n;
start_node (p, "border");
if (!gdk_rgba_equal (&colors[3], &colors[1]))
n = 4;
else if (!gdk_rgba_equal (&colors[2], &colors[0]))
n = 3;
else if (!gdk_rgba_equal (&colors[1], &colors[0]))
n = 2;
else if (!gdk_rgba_equal (&colors[0], &GDK_RGBA("000000")))
n = 1;
else
n = 0;
if (n > 0)
{
_indent (p);
g_string_append (p->str, "colors: ");
for (i = 0; i < n; i++)
{
if (i > 0)
g_string_append_c (p->str, ' ');
append_rgba (p->str, &colors[i]);
}
g_string_append (p->str, ";\n");
}
append_rounded_rect_param (p, "outline", gsk_border_node_peek_outline (node));
if (widths[3] != widths[1])
n = 4;
else if (widths[2] != widths[0])
n = 3;
else if (widths[1] != widths[0])
n = 2;
else if (widths[0] != 1.0)
n = 1;
else
n = 0;
if (n > 0)
{
_indent (p);
g_string_append (p->str, "widths: ");
for (i = 0; i < n; i++)
{
if (i > 0)
g_string_append_c (p->str, ' ');
string_append_double (p->str, widths[i]);
}
g_string_append (p->str, ";\n");
}
end_node (p);
}
break;
case GSK_SHADOW_NODE:
{
const guint n_shadows = gsk_shadow_node_get_n_shadows (node);
int i;
start_node (p, "shadow");
append_node_param (p, "child", gsk_shadow_node_get_child (node));
_indent (p);
g_string_append (p->str, "shadows: ");
for (i = 0; i < n_shadows; i ++)
{
const GskShadow *s = gsk_shadow_node_peek_shadow (node, i);
char *color;
if (i > 0)
g_string_append (p->str, ", ");
color = gdk_rgba_to_string (&s->color);
g_string_append (p->str, color);
g_string_append_c (p->str, ' ');
string_append_double (p->str, s->dx);
g_string_append_c (p->str, ' ');
string_append_double (p->str, s->dy);
if (s->radius > 0)
{
g_string_append_c (p->str, ' ');
string_append_double (p->str, s->radius);
}
g_free (color);
}
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
end_node (p);
}
break;
case GSK_INSET_SHADOW_NODE:
{
const GdkRGBA *color = gsk_inset_shadow_node_peek_color (node);
start_node (p, "inset-shadow");
append_float_param (p, "blur", gsk_inset_shadow_node_get_blur_radius (node), 0.0f);
if (!gdk_rgba_equal (color, &GDK_RGBA("000")))
append_rgba_param (p, "color", color);
append_float_param (p, "dx", gsk_inset_shadow_node_get_dx (node), 1.0f);
append_float_param (p, "dy", gsk_inset_shadow_node_get_dy (node), 1.0f);
append_rounded_rect_param (p, "outline", gsk_inset_shadow_node_peek_outline (node));
append_float_param (p, "spread", gsk_inset_shadow_node_get_spread (node), 0.0f);
end_node (p);
}
break;
case GSK_TEXTURE_NODE:
{
GdkTexture *texture = gsk_texture_node_get_texture (node);
cairo_surface_t *surface;
GByteArray *array;
char *b64;
start_node (p, "texture");
append_rect_param (p, "bounds", &node->bounds);
surface = gdk_texture_download_surface (texture);
array = g_byte_array_new ();
cairo_surface_write_to_png_stream (surface, cairo_write_array, array);
b64 = g_base64_encode (array->data, array->len);
_indent (p);
g_string_append_printf (p->str, "texture: url(\"data:image/png;base64,%s\");\n", b64);
end_node (p);
g_free (b64);
g_byte_array_free (array, TRUE);
cairo_surface_destroy (surface);
}
break;
case GSK_TEXT_NODE:
{
const guint n_glyphs = gsk_text_node_get_num_glyphs (node);
const PangoGlyphInfo *glyphs = gsk_text_node_peek_glyphs (node);
const graphene_point_t *offset = gsk_text_node_get_offset (node);
const GdkRGBA *color = gsk_text_node_peek_color (node);
PangoFont *font = gsk_text_node_peek_font (node);
PangoFontDescription *desc;
char *font_name;
GString *str;
guint i, j;
PangoGlyphString *ascii = create_ascii_glyphs (font);
start_node (p, "text");
if (!gdk_rgba_equal (color, &GDK_RGBA("000000")))
append_rgba_param (p, "color", color);
_indent (p);
desc = pango_font_describe (font);
font_name = pango_font_description_to_string (desc);
if (ascii == NULL)
g_print ("\"%s\" has no ascii table\n", font_name);
g_string_append_printf (p->str, "font: \"%s\";\n", font_name);
g_free (font_name);
pango_font_description_free (desc);
_indent (p);
str = g_string_new (NULL);
g_string_append (p->str, "glyphs: ");
for (i = 0; i < n_glyphs; i++)
{
if (ascii)
{
for (j = 0; j < ascii->num_glyphs; j++)
{
if (glyphs[i].glyph == ascii->glyphs[j].glyph &&
glyphs[i].geometry.width == ascii->glyphs[j].geometry.width &&
glyphs[i].geometry.x_offset == 0 &&
glyphs[i].geometry.x_offset == 0 &&
glyphs[i].attr.is_cluster_start)
{
g_string_append_c (str, j + MIN_ASCII_GLYPH);
break;
}
}
if (j != ascii->num_glyphs)
continue;
}
if (str->len)
{
g_string_append_printf (p->str, "\"%s\", ", str->str);
g_string_set_size (str, 0);
}
g_string_append_printf (p->str, "%u %g",
glyphs[i].glyph,
(double) glyphs[i].geometry.width / PANGO_SCALE);
if (!glyphs[i].attr.is_cluster_start ||
glyphs[i].geometry.x_offset != 0 ||
glyphs[i].geometry.y_offset != 0)
{
g_string_append_printf (p->str, "%g %g",
(double) glyphs[i].geometry.x_offset / PANGO_SCALE,
(double) glyphs[i].geometry.y_offset / PANGO_SCALE);
if (!glyphs[i].attr.is_cluster_start)
g_string_append (p->str, " same-cluster");
}
if (i + 1 < n_glyphs)
g_string_append (p->str, ", ");
}
if (str->len)
g_string_append_printf (p->str, "\"%s\"", str->str);
g_string_append_c (p->str, ';');
g_string_append_c (p->str, '\n');
if (!graphene_point_equal (offset, graphene_point_zero ()))
append_point_param (p, "offset", offset);
end_node (p);
g_string_free (str, TRUE);
if (ascii)
pango_glyph_string_free (ascii);
}
break;
case GSK_DEBUG_NODE:
{
const char *message = gsk_debug_node_get_message (node);
start_node (p, "debug");
append_node_param (p, "child", gsk_debug_node_get_child (node));
/* TODO: We potentially need to escape certain characters in the message */
if (message)
{
_indent (p);
g_string_append_printf (p->str, "message: \"%s\";\n", message);
}
end_node (p);
}
break;
case GSK_BLUR_NODE:
{
start_node (p, "blur");
append_float_param (p, "blur", gsk_blur_node_get_radius (node), 1.0f);
append_node_param (p, "child", gsk_blur_node_get_child (node));
end_node (p);
}
break;
case GSK_REPEAT_NODE:
{
GskRenderNode *child = gsk_repeat_node_get_child (node);
const graphene_rect_t *child_bounds = gsk_repeat_node_peek_child_bounds (node);
start_node (p, "repeat");
if (!graphene_rect_equal (&node->bounds, &child->bounds))
append_rect_param (p, "bounds", &node->bounds);
append_node_param (p, "child", gsk_repeat_node_get_child (node));
if (!graphene_rect_equal (child_bounds, &child->bounds))
append_rect_param (p, "child-bounds", child_bounds);
end_node (p);
}
break;
case GSK_BLEND_NODE:
{
GskBlendMode mode = gsk_blend_node_get_blend_mode (node);
guint i;
start_node (p, "blend");
append_node_param (p, "bottom", gsk_blend_node_get_bottom_child (node));
if (mode != GSK_BLEND_MODE_DEFAULT)
{
_indent (p);
for (i = 0; i < G_N_ELEMENTS (blend_modes); i++)
{
if (blend_modes[i].mode == mode)
{
g_string_append_printf (p->str, "mode: %s;\n", blend_modes[i].name);
break;
}
}
}
append_node_param (p, "top", gsk_blend_node_get_top_child (node));
end_node (p);
}
break;
case GSK_NOT_A_RENDER_NODE:
g_assert_not_reached ();
break;
case GSK_CAIRO_NODE:
{
cairo_surface_t *surface = gsk_cairo_node_peek_surface (node);
GByteArray *array;
char *b64;
start_node (p, "cairo");
append_rect_param (p, "bounds", &node->bounds);
if (surface != NULL)
{
array = g_byte_array_new ();
cairo_surface_write_to_png_stream (surface, cairo_write_array, array);
b64 = g_base64_encode (array->data, array->len);
_indent (p);
g_string_append_printf (p->str, "pixels: url(\"data:image/png;base64,%s\");\n", b64);
g_free (b64);
g_byte_array_free (array, TRUE);
#ifdef CAIRO_HAS_SCRIPT_SURFACE
if (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_RECORDING)
{
static const cairo_user_data_key_t cairo_is_stupid_key;
cairo_device_t *script;
array = g_byte_array_new ();
script = cairo_script_create_for_stream (cairo_write_array, array);
if (cairo_script_from_recording_surface (script, surface) == CAIRO_STATUS_SUCCESS)
{
b64 = g_base64_encode (array->data, array->len);
_indent (p);
g_string_append_printf (p->str, "script: url(\"data:;base64,%s\");\n", b64);
g_free (b64);
}
/* because Cairo is stupid and writes to the device after we finished it,
* we can't just
g_byte_array_free (array, TRUE);
* but have to
*/
g_byte_array_set_size (array, 0);
cairo_device_set_user_data (script, &cairo_is_stupid_key, array, cairo_destroy_array);
cairo_device_destroy (script);
}
#endif
}
end_node (p);
}
break;
default:
g_error ("Unhandled node: %s", node->node_class->type_name);
break;
}
}
/**
* gsk_render_node_serialize:
* @node: a #GskRenderNode
*
* Serializes the @node for later deserialization via
* gsk_render_node_deserialize(). No guarantees are made about the format
* used other than that the same version of GTK+ will be able to deserialize
* the result of a call to gsk_render_node_serialize() and
* gsk_render_node_deserialize() will correctly reject files it cannot open
* that were created with previous versions of GTK+.
*
* The intended use of this functions is testing, benchmarking and debugging.
* The format is not meant as a permanent storage format.
*
* Returns: a #GBytes representing the node.
**/
GBytes *
gsk_render_node_serialize (GskRenderNode *node)
{
Printer p;
printer_init (&p);
if (gsk_render_node_get_node_type (node) == GSK_CONTAINER_NODE)
{
guint i;
for (i = 0; i < gsk_container_node_get_n_children (node); i ++)
{
GskRenderNode *child = gsk_container_node_get_child (node, i);
render_node_print (&p, child);
}
}
else
{
render_node_print (&p, node);
}
return g_string_free_to_bytes (p.str);
}
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