mirror of
https://github.com/brl/mutter.git
synced 2024-12-26 12:52:14 +00:00
72e1ff05a8
The pango renderer was causing lots of override materials to be allocated because the vertex_buffer API converts AUTOMATIC mode into REPEAT for backwards compatibility. By explicitly setting the wrap mode to CLAMP_TO_EDGE when creating the glyph_material then the vertex_buffer API will leave it untouched.
697 lines
22 KiB
C
697 lines
22 KiB
C
/*
|
|
* Clutter.
|
|
*
|
|
* An OpenGL based 'interactive canvas' library.
|
|
*
|
|
* Authored By Matthew Allum <mallum@openedhand.com>
|
|
*
|
|
* Copyright (C) 2008 OpenedHand
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#ifndef PANGO_ENABLE_BACKEND
|
|
#define PANGO_ENABLE_BACKEND 1
|
|
#endif
|
|
|
|
#include <pango/pango-fontmap.h>
|
|
#include <pango/pangocairo.h>
|
|
#include <pango/pango-renderer.h>
|
|
#include <cairo.h>
|
|
|
|
#include "cogl-pango-private.h"
|
|
#include "cogl-pango-glyph-cache.h"
|
|
#include "cogl-pango-display-list.h"
|
|
|
|
struct _CoglPangoRenderer
|
|
{
|
|
PangoRenderer parent_instance;
|
|
|
|
/* The material used to texture from the glyph cache with */
|
|
CoglHandle glyph_material;
|
|
/* The material used for solid fills. (boxes, rectangles + trapezoids) */
|
|
CoglHandle solid_material;
|
|
|
|
/* Caches of glyphs as textures */
|
|
CoglPangoGlyphCache *glyph_cache;
|
|
|
|
/* The current display list that is being built */
|
|
CoglPangoDisplayList *display_list;
|
|
};
|
|
|
|
struct _CoglPangoRendererClass
|
|
{
|
|
PangoRendererClass class_instance;
|
|
};
|
|
|
|
typedef struct _CoglPangoRendererQdata CoglPangoRendererQdata;
|
|
|
|
/* An instance of this struct gets attached to each PangoLayout to
|
|
cache the VBO and to detect changes to the layout */
|
|
struct _CoglPangoRendererQdata
|
|
{
|
|
/* The cache of the geometry for the layout */
|
|
CoglPangoDisplayList *display_list;
|
|
/* A reference to the first line of the layout. This is just used to
|
|
detect changes */
|
|
PangoLayoutLine *first_line;
|
|
};
|
|
|
|
static void
|
|
cogl_pango_renderer_draw_glyph (CoglPangoRenderer *priv,
|
|
CoglPangoGlyphCacheValue *cache_value,
|
|
float x1,
|
|
float y1)
|
|
{
|
|
float x2, y2;
|
|
|
|
g_return_if_fail (priv->display_list != NULL);
|
|
|
|
x2 = x1 + (float) cache_value->draw_width;
|
|
y2 = y1 + (float) cache_value->draw_height;
|
|
|
|
_cogl_pango_display_list_add_texture (priv->display_list,
|
|
cache_value->texture,
|
|
x1, y1, x2, y2,
|
|
cache_value->tx1,
|
|
cache_value->ty1,
|
|
cache_value->tx2,
|
|
cache_value->ty2);
|
|
}
|
|
|
|
static void cogl_pango_renderer_finalize (GObject *object);
|
|
static void cogl_pango_renderer_draw_glyphs (PangoRenderer *renderer,
|
|
PangoFont *font,
|
|
PangoGlyphString *glyphs,
|
|
int x,
|
|
int y);
|
|
static void cogl_pango_renderer_draw_rectangle (PangoRenderer *renderer,
|
|
PangoRenderPart part,
|
|
int x,
|
|
int y,
|
|
int width,
|
|
int height);
|
|
static void cogl_pango_renderer_draw_trapezoid (PangoRenderer *renderer,
|
|
PangoRenderPart part,
|
|
double y1,
|
|
double x11,
|
|
double x21,
|
|
double y2,
|
|
double x12,
|
|
double x22);
|
|
|
|
G_DEFINE_TYPE (CoglPangoRenderer, cogl_pango_renderer, PANGO_TYPE_RENDERER);
|
|
|
|
static void
|
|
cogl_pango_renderer_init (CoglPangoRenderer *priv)
|
|
{
|
|
priv->glyph_material = cogl_material_new ();
|
|
|
|
/* The default combine mode of materials is to modulate (A x B) the texture
|
|
* RGBA channels with the RGBA channels of the previous layer (which in our
|
|
* case is just the font color)
|
|
*
|
|
* Since the RGB for an alpha texture is defined as 0, this gives us:
|
|
*
|
|
* result.rgb = color.rgb * 0
|
|
* result.a = color.a * texture.a
|
|
*
|
|
* What we want is premultiplied rgba values:
|
|
*
|
|
* result.rgba = color.rgb * texture.a
|
|
* result.a = color.a * texture.a
|
|
*/
|
|
cogl_material_set_layer_combine (priv->glyph_material, 0, /* layer */
|
|
"RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
|
|
NULL);
|
|
cogl_material_set_layer_wrap_mode (priv->glyph_material, 0,
|
|
COGL_MATERIAL_WRAP_MODE_CLAMP_TO_EDGE);
|
|
|
|
priv->solid_material = cogl_material_new ();
|
|
|
|
priv->glyph_cache = cogl_pango_glyph_cache_new ();
|
|
|
|
_cogl_pango_renderer_set_use_mipmapping (priv, FALSE);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_class_init (CoglPangoRendererClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
|
|
|
|
object_class->finalize = cogl_pango_renderer_finalize;
|
|
|
|
renderer_class->draw_glyphs = cogl_pango_renderer_draw_glyphs;
|
|
renderer_class->draw_rectangle = cogl_pango_renderer_draw_rectangle;
|
|
renderer_class->draw_trapezoid = cogl_pango_renderer_draw_trapezoid;
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_finalize (GObject *object)
|
|
{
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (object);
|
|
|
|
cogl_pango_glyph_cache_free (priv->glyph_cache);
|
|
|
|
G_OBJECT_CLASS (cogl_pango_renderer_parent_class)->finalize (object);
|
|
}
|
|
|
|
static CoglPangoRenderer *
|
|
cogl_pango_get_renderer_from_context (PangoContext *context)
|
|
{
|
|
PangoFontMap *font_map;
|
|
PangoRenderer *renderer;
|
|
CoglPangoFontMap *font_map_priv;
|
|
|
|
font_map = pango_context_get_font_map (context);
|
|
g_return_val_if_fail (COGL_PANGO_IS_FONT_MAP (font_map), NULL);
|
|
|
|
font_map_priv = COGL_PANGO_FONT_MAP (font_map);
|
|
renderer = cogl_pango_font_map_get_renderer (font_map_priv);
|
|
g_return_val_if_fail (COGL_PANGO_IS_RENDERER (renderer), NULL);
|
|
|
|
return COGL_PANGO_RENDERER (renderer);
|
|
}
|
|
|
|
static GQuark
|
|
cogl_pango_render_get_qdata_key (void)
|
|
{
|
|
static GQuark key = 0;
|
|
|
|
if (G_UNLIKELY (key == 0))
|
|
key = g_quark_from_static_string ("CoglPangoDisplayList");
|
|
|
|
return key;
|
|
}
|
|
|
|
static void
|
|
cogl_pango_render_qdata_destroy (CoglPangoRendererQdata *qdata)
|
|
{
|
|
if (qdata->display_list)
|
|
_cogl_pango_display_list_free (qdata->display_list);
|
|
if (qdata->first_line)
|
|
pango_layout_line_unref (qdata->first_line);
|
|
g_slice_free (CoglPangoRendererQdata, qdata);
|
|
}
|
|
|
|
/**
|
|
* cogl_pango_render_layout_subpixel:
|
|
* @layout: a #PangoLayout
|
|
* @x: FIXME
|
|
* @y: FIXME
|
|
* @color: color to use when rendering the layout
|
|
* @flags: flags to pass to the renderer
|
|
*
|
|
* FIXME
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void
|
|
cogl_pango_render_layout_subpixel (PangoLayout *layout,
|
|
int x,
|
|
int y,
|
|
const CoglColor *color,
|
|
int flags)
|
|
{
|
|
PangoContext *context;
|
|
CoglPangoRenderer *priv;
|
|
CoglPangoRendererQdata *qdata;
|
|
|
|
context = pango_layout_get_context (layout);
|
|
priv = cogl_pango_get_renderer_from_context (context);
|
|
if (G_UNLIKELY (!priv))
|
|
return;
|
|
|
|
qdata = g_object_get_qdata (G_OBJECT (layout),
|
|
cogl_pango_render_get_qdata_key ());
|
|
|
|
if (qdata == NULL)
|
|
{
|
|
qdata = g_slice_new0 (CoglPangoRendererQdata);
|
|
g_object_set_qdata_full (G_OBJECT (layout),
|
|
cogl_pango_render_get_qdata_key (),
|
|
qdata,
|
|
(GDestroyNotify)
|
|
cogl_pango_render_qdata_destroy);
|
|
}
|
|
|
|
/* Check if the layout has changed since the last build of the
|
|
display list. This trick was suggested by Behdad Esfahbod here:
|
|
http://mail.gnome.org/archives/gtk-i18n-list/2009-May/msg00019.html */
|
|
if (qdata->display_list && qdata->first_line
|
|
&& qdata->first_line->layout != layout)
|
|
{
|
|
_cogl_pango_display_list_free (qdata->display_list);
|
|
qdata->display_list = NULL;
|
|
}
|
|
|
|
if (qdata->display_list == NULL)
|
|
{
|
|
qdata->display_list = _cogl_pango_display_list_new ();
|
|
|
|
priv->display_list = qdata->display_list;
|
|
pango_renderer_draw_layout (PANGO_RENDERER (priv), layout, 0, 0);
|
|
priv->display_list = NULL;
|
|
}
|
|
|
|
cogl_push_matrix ();
|
|
cogl_translate (x / (gfloat) PANGO_SCALE, y / (gfloat) PANGO_SCALE, 0);
|
|
_cogl_pango_display_list_render (qdata->display_list,
|
|
color,
|
|
priv->glyph_material,
|
|
priv->solid_material);
|
|
cogl_pop_matrix ();
|
|
|
|
/* Keep a reference to the first line of the layout so we can detect
|
|
changes */
|
|
if (qdata->first_line)
|
|
{
|
|
pango_layout_line_unref (qdata->first_line);
|
|
qdata->first_line = NULL;
|
|
}
|
|
if (pango_layout_get_line_count (layout) > 0)
|
|
{
|
|
qdata->first_line = pango_layout_get_line (layout, 0);
|
|
pango_layout_line_ref (qdata->first_line);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* cogl_pango_render_layout:
|
|
* @layout: a #PangoLayout
|
|
* @x: X coordinate to render the layout at
|
|
* @y: Y coordinate to render the layout at
|
|
* @color: color to use when rendering the layout
|
|
* @flags: flags to pass to the renderer
|
|
*
|
|
* Renders @layout.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void
|
|
cogl_pango_render_layout (PangoLayout *layout,
|
|
int x,
|
|
int y,
|
|
const CoglColor *color,
|
|
int flags)
|
|
{
|
|
cogl_pango_render_layout_subpixel (layout,
|
|
x * PANGO_SCALE,
|
|
y * PANGO_SCALE,
|
|
color,
|
|
flags);
|
|
}
|
|
|
|
/**
|
|
* cogl_pango_render_layout_line:
|
|
* @line: a #PangoLayoutLine
|
|
* @x: X coordinate to render the line at
|
|
* @y: Y coordinate to render the line at
|
|
* @color: color to use when rendering the line
|
|
*
|
|
* Renders @line at the given coordinates using the given color.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void
|
|
cogl_pango_render_layout_line (PangoLayoutLine *line,
|
|
int x,
|
|
int y,
|
|
const CoglColor *color)
|
|
{
|
|
PangoContext *context;
|
|
CoglPangoRenderer *priv;
|
|
|
|
context = pango_layout_get_context (line->layout);
|
|
priv = cogl_pango_get_renderer_from_context (context);
|
|
if (G_UNLIKELY (!priv))
|
|
return;
|
|
|
|
priv->display_list = _cogl_pango_display_list_new ();
|
|
|
|
pango_renderer_draw_layout_line (PANGO_RENDERER (priv), line, x, y);
|
|
|
|
_cogl_pango_display_list_render (priv->display_list,
|
|
color,
|
|
priv->glyph_material,
|
|
priv->solid_material);
|
|
|
|
_cogl_pango_display_list_free (priv->display_list);
|
|
priv->display_list = NULL;
|
|
}
|
|
|
|
void
|
|
_cogl_pango_renderer_clear_glyph_cache (CoglPangoRenderer *renderer)
|
|
{
|
|
cogl_pango_glyph_cache_clear (renderer->glyph_cache);
|
|
}
|
|
|
|
void
|
|
_cogl_pango_renderer_set_use_mipmapping (CoglPangoRenderer *renderer,
|
|
gboolean value)
|
|
{
|
|
if (value)
|
|
cogl_material_set_layer_filters (renderer->glyph_material, 0,
|
|
COGL_MATERIAL_FILTER_LINEAR_MIPMAP_LINEAR,
|
|
COGL_MATERIAL_FILTER_LINEAR);
|
|
else
|
|
cogl_material_set_layer_filters (renderer->glyph_material, 0,
|
|
COGL_MATERIAL_FILTER_LINEAR,
|
|
COGL_MATERIAL_FILTER_LINEAR);
|
|
}
|
|
|
|
gboolean
|
|
_cogl_pango_renderer_get_use_mipmapping (CoglPangoRenderer *renderer)
|
|
{
|
|
const GList *layers = cogl_material_get_layers (renderer->glyph_material);
|
|
|
|
g_return_val_if_fail (layers != NULL, FALSE);
|
|
|
|
return (cogl_material_layer_get_min_filter (layers->data)
|
|
== COGL_MATERIAL_FILTER_LINEAR_MIPMAP_LINEAR);
|
|
}
|
|
|
|
static CoglPangoGlyphCacheValue *
|
|
cogl_pango_renderer_get_cached_glyph (PangoRenderer *renderer,
|
|
PangoFont *font,
|
|
PangoGlyph glyph)
|
|
{
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
|
|
CoglPangoGlyphCacheValue *value;
|
|
|
|
value = cogl_pango_glyph_cache_lookup (priv->glyph_cache, font, glyph);
|
|
if (value == NULL)
|
|
{
|
|
cairo_surface_t *surface;
|
|
cairo_t *cr;
|
|
cairo_scaled_font_t *scaled_font;
|
|
PangoRectangle ink_rect;
|
|
cairo_glyph_t cairo_glyph;
|
|
|
|
pango_font_get_glyph_extents (font, glyph, &ink_rect, NULL);
|
|
pango_extents_to_pixels (&ink_rect, NULL);
|
|
|
|
surface = cairo_image_surface_create (CAIRO_FORMAT_A8,
|
|
ink_rect.width,
|
|
ink_rect.height);
|
|
cr = cairo_create (surface);
|
|
|
|
scaled_font = pango_cairo_font_get_scaled_font (PANGO_CAIRO_FONT (font));
|
|
cairo_set_scaled_font (cr, scaled_font);
|
|
|
|
cairo_glyph.x = -ink_rect.x;
|
|
cairo_glyph.y = -ink_rect.y;
|
|
/* The PangoCairo glyph numbers directly map to Cairo glyph
|
|
numbers */
|
|
cairo_glyph.index = glyph;
|
|
cairo_show_glyphs (cr, &cairo_glyph, 1);
|
|
|
|
cairo_destroy (cr);
|
|
cairo_surface_flush (surface);
|
|
|
|
/* Copy the glyph to the cache */
|
|
value =
|
|
cogl_pango_glyph_cache_set (priv->glyph_cache, font, glyph,
|
|
cairo_image_surface_get_data (surface),
|
|
cairo_image_surface_get_width (surface),
|
|
cairo_image_surface_get_height (surface),
|
|
cairo_image_surface_get_stride (surface),
|
|
ink_rect.x, ink_rect.y);
|
|
|
|
cairo_surface_destroy (surface);
|
|
|
|
COGL_NOTE (PANGO, "cache fail %i", glyph);
|
|
}
|
|
else
|
|
{
|
|
COGL_NOTE (PANGO, "cache success %i", glyph);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
void
|
|
cogl_pango_ensure_glyph_cache_for_layout (PangoLayout *layout)
|
|
{
|
|
PangoContext *context;
|
|
PangoRenderer *renderer;
|
|
PangoLayoutIter *iter;
|
|
|
|
g_return_if_fail (PANGO_IS_LAYOUT (layout));
|
|
|
|
if ((iter = pango_layout_get_iter (layout)) == NULL)
|
|
return;
|
|
|
|
context = pango_layout_get_context (layout);
|
|
renderer =
|
|
PANGO_RENDERER (cogl_pango_get_renderer_from_context (context));
|
|
|
|
do
|
|
{
|
|
PangoLayoutLine *line;
|
|
GSList *l;
|
|
|
|
line = pango_layout_iter_get_line_readonly (iter);
|
|
|
|
for (l = line->runs; l; l = l->next)
|
|
{
|
|
PangoLayoutRun *run = l->data;
|
|
PangoGlyphString *glyphs = run->glyphs;
|
|
int i;
|
|
|
|
for (i = 0; i < glyphs->num_glyphs; i++)
|
|
{
|
|
PangoGlyphInfo *gi = &glyphs->glyphs[i];
|
|
|
|
cogl_pango_renderer_get_cached_glyph (renderer,
|
|
run->item->analysis.font,
|
|
gi->glyph);
|
|
}
|
|
}
|
|
}
|
|
while (pango_layout_iter_next_line (iter));
|
|
|
|
pango_layout_iter_free (iter);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_set_color_for_part (PangoRenderer *renderer,
|
|
PangoRenderPart part)
|
|
{
|
|
PangoColor *pango_color = pango_renderer_get_color (renderer, part);
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
|
|
|
|
if (pango_color)
|
|
{
|
|
CoglColor color;
|
|
|
|
cogl_color_set_from_4ub (&color,
|
|
pango_color->red >> 8,
|
|
pango_color->green >> 8,
|
|
pango_color->blue >> 8,
|
|
0xff);
|
|
|
|
_cogl_pango_display_list_set_color_override (priv->display_list, &color);
|
|
}
|
|
else
|
|
_cogl_pango_display_list_remove_color_override (priv->display_list);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_draw_box (PangoRenderer *renderer,
|
|
int x,
|
|
int y,
|
|
int width,
|
|
int height)
|
|
{
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
|
|
|
|
g_return_if_fail (priv->display_list != NULL);
|
|
|
|
_cogl_pango_display_list_add_rectangle (priv->display_list,
|
|
x,
|
|
y - height,
|
|
x + width,
|
|
y);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_get_device_units (PangoRenderer *renderer,
|
|
int xin,
|
|
int yin,
|
|
float *xout,
|
|
float *yout)
|
|
{
|
|
const PangoMatrix *matrix;
|
|
|
|
if ((matrix = pango_renderer_get_matrix (renderer)))
|
|
{
|
|
/* Convert user-space coords to device coords */
|
|
*xout = ((xin * matrix->xx + yin * matrix->xy)
|
|
/ PANGO_SCALE + matrix->x0);
|
|
*yout = ((yin * matrix->yy + xin * matrix->yx)
|
|
/ PANGO_SCALE + matrix->y0);
|
|
}
|
|
else
|
|
{
|
|
*xout = PANGO_PIXELS (xin);
|
|
*yout = PANGO_PIXELS (yin);
|
|
}
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_draw_rectangle (PangoRenderer *renderer,
|
|
PangoRenderPart part,
|
|
int x,
|
|
int y,
|
|
int width,
|
|
int height)
|
|
{
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
|
|
float x1, x2, y1, y2;
|
|
|
|
g_return_if_fail (priv->display_list != NULL);
|
|
|
|
cogl_pango_renderer_set_color_for_part (renderer, part);
|
|
|
|
cogl_pango_renderer_get_device_units (renderer,
|
|
x, y,
|
|
&x1, &y1);
|
|
cogl_pango_renderer_get_device_units (renderer,
|
|
x + width, y + height,
|
|
&x2, &y2);
|
|
|
|
_cogl_pango_display_list_add_rectangle (priv->display_list,
|
|
x1, y1, x2, y2);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_draw_trapezoid (PangoRenderer *renderer,
|
|
PangoRenderPart part,
|
|
double y1,
|
|
double x11,
|
|
double x21,
|
|
double y2,
|
|
double x12,
|
|
double x22)
|
|
{
|
|
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
|
|
float points[8];
|
|
|
|
g_return_if_fail (priv->display_list != NULL);
|
|
|
|
points[0] = (x11);
|
|
points[1] = (y1);
|
|
points[2] = (x12);
|
|
points[3] = (y2);
|
|
points[4] = (x22);
|
|
points[5] = points[3];
|
|
points[6] = (x21);
|
|
points[7] = points[1];
|
|
|
|
cogl_pango_renderer_set_color_for_part (renderer, part);
|
|
|
|
_cogl_pango_display_list_add_trapezoid (priv->display_list,
|
|
y1,
|
|
x11,
|
|
x21,
|
|
y2,
|
|
x12,
|
|
x22);
|
|
}
|
|
|
|
static void
|
|
cogl_pango_renderer_draw_glyphs (PangoRenderer *renderer,
|
|
PangoFont *font,
|
|
PangoGlyphString *glyphs,
|
|
int xi,
|
|
int yi)
|
|
{
|
|
CoglPangoRenderer *priv = (CoglPangoRenderer *) renderer;
|
|
CoglPangoGlyphCacheValue *cache_value;
|
|
int i;
|
|
|
|
cogl_pango_renderer_set_color_for_part (renderer,
|
|
PANGO_RENDER_PART_FOREGROUND);
|
|
|
|
for (i = 0; i < glyphs->num_glyphs; i++)
|
|
{
|
|
PangoGlyphInfo *gi = glyphs->glyphs + i;
|
|
float x, y;
|
|
|
|
cogl_pango_renderer_get_device_units (renderer,
|
|
xi + gi->geometry.x_offset,
|
|
yi + gi->geometry.y_offset,
|
|
&x, &y);
|
|
|
|
if ((gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
|
|
{
|
|
PangoFontMetrics *metrics;
|
|
|
|
if (font == NULL ||
|
|
(metrics = pango_font_get_metrics (font, NULL)) == NULL)
|
|
{
|
|
cogl_pango_renderer_draw_box (renderer,
|
|
x,
|
|
y,
|
|
PANGO_UNKNOWN_GLYPH_WIDTH,
|
|
PANGO_UNKNOWN_GLYPH_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
cogl_pango_renderer_draw_box (renderer,
|
|
x,
|
|
y,
|
|
metrics->approximate_char_width
|
|
/ PANGO_SCALE,
|
|
metrics->ascent / PANGO_SCALE);
|
|
|
|
pango_font_metrics_unref (metrics);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Get the texture containing the glyph. This will create
|
|
the cache entry if there isn't already one */
|
|
cache_value =
|
|
cogl_pango_renderer_get_cached_glyph (renderer,
|
|
font,
|
|
gi->glyph);
|
|
|
|
if (cache_value == NULL)
|
|
{
|
|
cogl_pango_renderer_draw_box (renderer,
|
|
x,
|
|
y,
|
|
PANGO_UNKNOWN_GLYPH_WIDTH,
|
|
PANGO_UNKNOWN_GLYPH_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
x += (float)(cache_value->draw_x);
|
|
y += (float)(cache_value->draw_y);
|
|
|
|
cogl_pango_renderer_draw_glyph (priv, cache_value, x, y);
|
|
}
|
|
}
|
|
|
|
xi += gi->geometry.width;
|
|
}
|
|
}
|