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+/* $XFree86$ */
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** 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.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#define NEED_REPLIES
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "glxserver.h"
+#include "glxutil.h"
+#include "g_disptab.h"
+#include <unpack.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 *) __glXMalloc(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;
+ }
+ glBitmap(w, h, -pci->metrics.leftSideBearing, pci->metrics.descent,
+ pci->metrics.characterWidth, 0, allocbuf ? allocbuf : buf);
+
+ if (allocbuf) {
+ __glXFree(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;
+
+ glPixelStorei(GL_UNPACK_SWAP_BYTES, FALSE);
+ glPixelStorei(GL_UNPACK_LSB_FIRST, BITMAP_BIT_ORDER == LSBFirst);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+ glPixelStorei(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.
+ */
+ glNewList(list_base + i, GL_COMPILE);
+ if (nglyphs ) {
+ rv = __glXMakeBitmapFromGlyph(pFont, pci);
+ if (rv) {
+ return rv;
+ }
+ }
+ glEndList();
+ }
+ return Success;
+}
+
+/************************************************************************/
+
+int __glXUseXFont(__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;
+ }
+
+ glGetIntegerv(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 __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);
+}