202 lines
6.1 KiB
C
202 lines
6.1 KiB
C
/* $XFree86$ */
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/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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*/
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#define NEED_REPLIES
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "glxserver.h"
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#include "glxutil.h"
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#include "unpack.h"
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#include "g_disptab.h"
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#include "glapitable.h"
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#include "glapi.h"
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#include "glthread.h"
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#include "dispatch.h"
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#include <GL/gl.h>
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#include <pixmapstr.h>
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#include <windowstr.h>
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#include <dixfontstr.h>
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extern XID clientErrorValue; /* imported kludge from dix layer */
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/*
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** Make a single GL bitmap from a single X glyph
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*/
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static int __glXMakeBitmapFromGlyph(FontPtr font, CharInfoPtr pci)
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{
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int i, j;
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int widthPadded; /* width of glyph in bytes, as padded by X */
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int allocBytes; /* bytes to allocate to store bitmap */
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int w; /* width of glyph in bits */
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int h; /* height of glyph */
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register unsigned char *pglyph;
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register unsigned char *p;
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unsigned char *allocbuf;
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#define __GL_CHAR_BUF_SIZE 2048
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unsigned char buf[__GL_CHAR_BUF_SIZE];
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w = GLYPHWIDTHPIXELS(pci);
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h = GLYPHHEIGHTPIXELS(pci);
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widthPadded = GLYPHWIDTHBYTESPADDED(pci);
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/*
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** Use the local buf if possible, otherwise malloc.
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*/
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allocBytes = widthPadded * h;
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if (allocBytes <= __GL_CHAR_BUF_SIZE) {
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p = buf;
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allocbuf = 0;
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} else {
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p = (unsigned char *) xalloc(allocBytes);
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if (!p)
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return BadAlloc;
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allocbuf = p;
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}
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/*
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** We have to reverse the picture, top to bottom
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*/
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pglyph = FONTGLYPHBITS(FONTGLYPHS(font), pci) + (h-1)*widthPadded;
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for (j=0; j < h; j++) {
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for (i=0; i < widthPadded; i++) {
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p[i] = pglyph[i];
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}
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pglyph -= widthPadded;
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p += widthPadded;
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}
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CALL_Bitmap( GET_DISPATCH(), (w, h, -pci->metrics.leftSideBearing,
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pci->metrics.descent,
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pci->metrics.characterWidth, 0,
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allocbuf ? allocbuf : buf) );
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if (allocbuf) {
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xfree(allocbuf);
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}
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return Success;
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#undef __GL_CHAR_BUF_SIZE
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}
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/*
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** Create a GL bitmap for each character in the X font. The bitmap is stored
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** in a display list.
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*/
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static int
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MakeBitmapsFromFont(FontPtr pFont, int first, int count, int list_base)
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{
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unsigned long i, nglyphs;
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CARD8 chs[2]; /* the font index we are going after */
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CharInfoPtr pci;
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int rv; /* return value */
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int encoding = (FONTLASTROW(pFont) == 0) ? Linear16Bit : TwoD16Bit;
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SWAP_BYTES, FALSE) );
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_LSB_FIRST, BITMAP_BIT_ORDER == LSBFirst) );
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ROW_LENGTH, 0) );
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_ROWS, 0) );
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_PIXELS, 0) );
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CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ALIGNMENT, GLYPHPADBYTES) );
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for (i=0; i < count; i++) {
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chs[0] = (first + i) >> 8; /* high byte is first byte */
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chs[1] = first + i;
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(*pFont->get_glyphs)(pFont, 1, chs, (FontEncoding)encoding,
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&nglyphs, &pci);
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/*
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** Define a display list containing just a glBitmap() call.
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*/
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CALL_NewList( GET_DISPATCH(), (list_base + i, GL_COMPILE) );
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if (nglyphs ) {
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rv = __glXMakeBitmapFromGlyph(pFont, pci);
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if (rv) {
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return rv;
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}
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}
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CALL_EndList( GET_DISPATCH(), () );
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}
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return Success;
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}
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/************************************************************************/
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int __glXUseXFont(__GLXclientState *cl, GLbyte *pc)
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{
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ClientPtr client = cl->client;
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xGLXUseXFontReq *req;
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FontPtr pFont;
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GC *pGC;
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GLuint currentListIndex;
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__GLXcontext *cx;
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int error;
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req = (xGLXUseXFontReq *) pc;
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cx = __glXForceCurrent(cl, req->contextTag, &error);
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if (!cx) {
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return error;
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}
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CALL_GetIntegerv( GET_DISPATCH(), (GL_LIST_INDEX, (GLint*) ¤tListIndex) );
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if (currentListIndex != 0) {
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/*
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** A display list is currently being made. It is an error
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** to try to make a font during another lists construction.
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*/
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client->errorValue = cx->id;
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return __glXBadContextState;
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}
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/*
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** Font can actually be either the ID of a font or the ID of a GC
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** containing a font.
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*/
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pFont = (FontPtr)LookupIDByType(req->font, RT_FONT);
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if (!pFont) {
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pGC = (GC *)LookupIDByType(req->font, RT_GC);
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if (!pGC) {
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client->errorValue = req->font;
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return BadFont;
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}
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pFont = pGC->font;
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}
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return MakeBitmapsFromFont(pFont, req->first, req->count,
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req->listBase);
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}
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