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nuttx/graphics/nxfonts/nxfonts_getfont.c
patacongo 6bcf6e7f99 Ooopx, the last version of nxfonts_getfont.c was still in the editor 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3826 42af7a65-404d-4744-a932-0658087f49c3
2011-07-29 13:41:08 +00:00

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/****************************************************************************
* graphics/nxfonts/nxfonts_getfont.c
*
* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT}
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING}
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stddef.h>
#include <debug.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxfonts.h>
#include "nxfonts_internal.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/* SANS */
#ifdef CONFIG_NXFONT_SANS23X27
extern const struct nx_fontpackage_s g_sans23x27_package;
#endif
#ifdef CONFIG_NXFONT_SANS22X29
extern const struct nx_fontpackage_s g_sans22x29_package;
#endif
#ifdef CONFIG_NXFONT_SANS28X37
extern const struct nx_fontpackage_s g_sans28x37_package;
#endif
#ifdef CONFIG_NXFONT_SANS39X48
extern const struct nx_fontpackage_s g_sans39x48_package;
#endif
/* SANS-BOLD */
#ifdef CONFIG_NXFONT_SANS22X29B
extern const struct nx_fontpackage_s g_sans22x29b_package;
#endif
#ifdef CONFIG_NXFONT_SANS28X37B
extern const struct nx_fontpackage_s g_sans28x37b_package;
#endif
#ifdef CONFIG_NXFONT_SANS40X49B
extern const struct nx_fontpackage_s g_sans40x49b_package;
#endif
/* SERIF */
#ifdef CONFIG_NXFONT_SERIF22X29
extern const struct nx_fontpackage_s g_serif22x29_package;
#endif
#ifdef CONFIG_NXFONT_SERIF29X37
extern const struct nx_fontpackage_s g_serif29x37_package;
#endif
#ifdef CONFIG_NXFONT_SERIF38X48
extern const struct nx_fontpackage_s g_serif38x48_package;
#endif
/* SERIF-BOLD */
#ifdef CONFIG_NXFONT_SERIF22X28B
extern const struct nx_fontpackage_s g_serif22x28b_package;
#endif
#ifdef CONFIG_NXFONT_SERIF27X38B
extern const struct nx_fontpackage_s g_serif27x38b_package;
#endif
#ifdef CONFIG_NXFONT_SERIF38X49
extern const struct nx_fontpackage_s g_serif38x49b_package;
#endif
static FAR const struct nx_fontpackage_s *g_fontpackages[] =
{
/* SANS */
#ifdef CONFIG_NXFONT_SANS23X27
&g_sans23x27_package,
#endif
#ifdef CONFIG_NXFONT_SANS22X29
&g_sans22x29_package,
#endif
#ifdef CONFIG_NXFONT_SANS28X37
&g_sans28x37_package,
#endif
#ifdef CONFIG_NXFONT_SANS39X48
&g_sans39x48_package,
#endif
/* SANS-BOLD */
#ifdef CONFIG_NXFONT_SANS22X29B
&g_sans22x29b_package,
#endif
#ifdef CONFIG_NXFONT_SANS28X37B
&g_sans28x37b_package,
#endif
#ifdef CONFIG_NXFONT_SANS40X49B
&g_sans40x49b_package,
#endif
/* SERIF */
#ifdef CONFIG_NXFONT_SERIF22X29
&g_serif22x29_package,
#endif
#ifdef CONFIG_NXFONT_SERIF29X37
&g_serif29x37_package,
#endif
#ifdef CONFIG_NXFONT_SERIF38X48
&g_serif38x48_package,
#endif
/* SERIF-BOLD */
#ifdef CONFIG_NXFONT_SERIF22X28B
&g_serif22x28b_package,
#endif
#ifdef CONFIG_NXFONT_SERIF27X38B
&g_serif27x38b_package,
#endif
#ifdef CONFIG_NXFONT_SERIF38X49B
&g_serif38x49b_package,
#endif
NULL
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxf_getglyphset
*
* Description:
* Return information about the font set containtined he selected
* character encoding.
*
* Input Parameters:
* ch: character code
* package: The selected font package
*
****************************************************************************/
static inline FAR const struct nx_fontset_s *
nxf_getglyphset(uint16_t ch, FAR const struct nx_fontpackage_s *package)
{
FAR const struct nx_fontset_s *fontset;
/* Select the 7- or 8-bit font set */
if (ch < 128)
{
/* Select the 7-bit font set */
fontset = &package->font7;
}
else if (ch < 256)
{
#if CONFIG_NXFONTS_CHARBITS >= 8
/* Select the 8-bit font set */
fontset = &package->font8;
#else
gdbg("8-bit font support disabled: %d\n", ch);
return NULL;
#endif
}
else
{
/* Someday, perhaps 16-bit fonts will go here */
gdbg("16-bit font not currently supported\n");
return NULL;
}
/* Then verify that the character actually resides in the font */
if (ch >= fontset->first && ch < fontset->first +fontset->nchars)
{
return fontset;
}
gdbg("No bitmap for code %02x\n", ch);
return NULL;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxf_getfonthandle
*
* Description:
* Given a numeric font ID, return a handle that may be subsequently be
* used to access the font data sets.
*
* Input Parameters:
* fontid: Identifies the font set to get
*
****************************************************************************/
NXHANDLE nxf_getfonthandle(enum nx_fontid_e fontid)
{
FAR const struct nx_fontpackage_s **pkglist;
FAR const struct nx_fontpackage_s *package;
FAR const struct nx_fontpackage_s *defpkg = NULL;
/* Handle the default font package */
if (fontid == FONTID_DEFAULT)
{
fontid = NXFONT_DEFAULT;
}
/* Then search for the font package with this ID */
for (pkglist = g_fontpackages; *pkglist; pkglist++)
{
/* Is this the package with the matching font ID? */
package = *pkglist;
if (package->id == fontid)
{
/* Yes.. return a pointer to the package as the handle */
return (NXHANDLE)package;
}
/* No.. is it the default font? */
else if (package->id == NXFONT_DEFAULT)
{
/* Yes.. save the pointer to the default font. We will return the
* default font if the requested font cannot be found.
*/
defpkg = package;
}
}
/* Return a pointer to the default font as the handle. */
return (NXHANDLE)defpkg;
}
/****************************************************************************
* Name: nxf_getfontset
*
* Description:
* Return information about the current font set
*
* Input Parameters:
* handle: A font handle previously returned by nxf_getfonthandle
*
****************************************************************************/
FAR const struct nx_font_s *nxf_getfontset(NXHANDLE handle)
{
FAR const struct nx_fontpackage_s *package =
(FAR const struct nx_fontpackage_s *)handle;
/* Find the font package associated with this font ID */
if (package)
{
/* Found... return the font set metrics for this font package */
return &package->metrics;
}
return NULL;
}
/****************************************************************************
* Name: nxf_getbitmap
*
* Description:
* Return font bitmap information for the selected character encoding.
*
* Input Parameters:
* handle: A font handle previously returned by nxf_getfonthandle
* ch: Character code whose bitmap is requested
*
* Returned Value:
* An instance of struct nx_fontbitmap_s describing the glyph.
*
****************************************************************************/
FAR const struct nx_fontbitmap_s *nxf_getbitmap(NXHANDLE handle, uint16_t ch)
{
FAR const struct nx_fontpackage_s *package =
(FAR const struct nx_fontpackage_s *)handle;
FAR const struct nx_fontset_s *fontset;
FAR const struct nx_fontbitmap_s *bm = NULL;
/* Verify that the handle is a font package */
if (package)
{
/* Now get the fontset from the package */
fontset = nxf_getglyphset(ch, package);
if (fontset)
{
/* Then get the bitmap from the font set */
bm = &fontset->bitmap[ch - fontset->first];
}
}
return bm;
}
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