201 lines
6.0 KiB
C
201 lines
6.0 KiB
C
/*
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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice including the dates of first publication and
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* either this permission notice or a reference to
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* http://oss.sgi.com/projects/FreeB/
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* shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of Silicon Graphics, Inc.
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* shall not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization from
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* Silicon Graphics, Inc.
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*/
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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 "indirect_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 __glXDisp_UseXFont(__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 __glXError(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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error = dixLookupResourceByType((pointer *)&pFont,
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req->font, RT_FONT,
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client, DixReadAccess);
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if (error != Success) {
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error = dixLookupResourceByType((pointer *)&pGC,
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req->font, RT_GC,
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client, DixReadAccess);
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if (error != Success) {
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client->errorValue = req->font;
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return error == BadGC ? BadFont : error;
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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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