xserver-multidpi/glx/xfont.c
Adam Jackson 69b79c1a66 Update to SGI FreeB 2.0.
Under the terms of version 1.1, "once Covered Code has been published
under a particular version of the License, Recipient may, for the
duration of the License, continue to use it under the terms of that
version, or choose to use such Covered Code under the terms of any
subsequent version published by SGI."

FreeB 2.0 license refers to "dates of first publication".  They are here
taken to be 1991-2000, as noted in the original license text:

 ** Original Code. The Original Code is: OpenGL Sample Implementation,
 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.

Official FreeB 2.0 text:

http://oss.sgi.com/projects/FreeB/SGIFreeSWLicB.2.0.pdf

As always, this code has not been tested for conformance with the OpenGL
specification.  OpenGL conformance testing is available from
http://khronos.org/ and is required for use of the OpenGL logo in
product advertising and promotion.
2008-09-19 12:02:28 -04:00

197 lines
5.9 KiB
C

/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#define NEED_REPLIES
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "glxserver.h"
#include "glxutil.h"
#include "unpack.h"
#include "g_disptab.h"
#include "glapitable.h"
#include "glapi.h"
#include "glthread.h"
#include "dispatch.h"
#include "indirect_dispatch.h"
#include <GL/gl.h>
#include <pixmapstr.h>
#include <windowstr.h>
#include <dixfontstr.h>
extern XID clientErrorValue; /* imported kludge from dix layer */
/*
** Make a single GL bitmap from a single X glyph
*/
static int __glXMakeBitmapFromGlyph(FontPtr font, CharInfoPtr pci)
{
int i, j;
int widthPadded; /* width of glyph in bytes, as padded by X */
int allocBytes; /* bytes to allocate to store bitmap */
int w; /* width of glyph in bits */
int h; /* height of glyph */
register unsigned char *pglyph;
register unsigned char *p;
unsigned char *allocbuf;
#define __GL_CHAR_BUF_SIZE 2048
unsigned char buf[__GL_CHAR_BUF_SIZE];
w = GLYPHWIDTHPIXELS(pci);
h = GLYPHHEIGHTPIXELS(pci);
widthPadded = GLYPHWIDTHBYTESPADDED(pci);
/*
** Use the local buf if possible, otherwise malloc.
*/
allocBytes = widthPadded * h;
if (allocBytes <= __GL_CHAR_BUF_SIZE) {
p = buf;
allocbuf = 0;
} else {
p = (unsigned char *) xalloc(allocBytes);
if (!p)
return BadAlloc;
allocbuf = p;
}
/*
** We have to reverse the picture, top to bottom
*/
pglyph = FONTGLYPHBITS(FONTGLYPHS(font), pci) + (h-1)*widthPadded;
for (j=0; j < h; j++) {
for (i=0; i < widthPadded; i++) {
p[i] = pglyph[i];
}
pglyph -= widthPadded;
p += widthPadded;
}
CALL_Bitmap( GET_DISPATCH(), (w, h, -pci->metrics.leftSideBearing,
pci->metrics.descent,
pci->metrics.characterWidth, 0,
allocbuf ? allocbuf : buf) );
if (allocbuf) {
xfree(allocbuf);
}
return Success;
#undef __GL_CHAR_BUF_SIZE
}
/*
** Create a GL bitmap for each character in the X font. The bitmap is stored
** in a display list.
*/
static int
MakeBitmapsFromFont(FontPtr pFont, int first, int count, int list_base)
{
unsigned long i, nglyphs;
CARD8 chs[2]; /* the font index we are going after */
CharInfoPtr pci;
int rv; /* return value */
int encoding = (FONTLASTROW(pFont) == 0) ? Linear16Bit : TwoD16Bit;
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SWAP_BYTES, FALSE) );
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_LSB_FIRST, BITMAP_BIT_ORDER == LSBFirst) );
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ROW_LENGTH, 0) );
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_ROWS, 0) );
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_PIXELS, 0) );
CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ALIGNMENT, GLYPHPADBYTES) );
for (i=0; i < count; i++) {
chs[0] = (first + i) >> 8; /* high byte is first byte */
chs[1] = first + i;
(*pFont->get_glyphs)(pFont, 1, chs, (FontEncoding)encoding,
&nglyphs, &pci);
/*
** Define a display list containing just a glBitmap() call.
*/
CALL_NewList( GET_DISPATCH(), (list_base + i, GL_COMPILE) );
if (nglyphs ) {
rv = __glXMakeBitmapFromGlyph(pFont, pci);
if (rv) {
return rv;
}
}
CALL_EndList( GET_DISPATCH(), () );
}
return Success;
}
/************************************************************************/
int __glXDisp_UseXFont(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXUseXFontReq *req;
FontPtr pFont;
GC *pGC;
GLuint currentListIndex;
__GLXcontext *cx;
int error;
req = (xGLXUseXFontReq *) pc;
cx = __glXForceCurrent(cl, req->contextTag, &error);
if (!cx) {
return error;
}
CALL_GetIntegerv( GET_DISPATCH(), (GL_LIST_INDEX, (GLint*) &currentListIndex) );
if (currentListIndex != 0) {
/*
** A display list is currently being made. It is an error
** to try to make a font during another lists construction.
*/
client->errorValue = cx->id;
return __glXError(GLXBadContextState);
}
/*
** Font can actually be either the ID of a font or the ID of a GC
** containing a font.
*/
pFont = (FontPtr)LookupIDByType(req->font, RT_FONT);
if (!pFont) {
pGC = (GC *)LookupIDByType(req->font, RT_GC);
if (!pGC) {
client->errorValue = req->font;
return BadFont;
}
pFont = pGC->font;
}
return MakeBitmapsFromFont(pFont, req->first, req->count,
req->listBase);
}