src/glx/x11/pixelstore.c

   1 /* $XFree86: xc/lib/GL/glx/pixelstore.c,v 1.4 2004/01/28 18:11:43 alanh Exp $ */
   2 /*
   3 ** License Applicability. Except to the extent portions of this file are
   4 ** made subject to an alternative license as permitted in the SGI Free
   5 ** Software License B, Version 1.1 (the "License"), the contents of this
   6 ** file are subject only to the provisions of the License. You may not use
   7 ** this file except in compliance with the License. You may obtain a copy
   8 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   9 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  10 **
  11 ** http://oss.sgi.com/projects/FreeB
  12 **
  13 ** Note that, as provided in the License, the Software is distributed on an
  14 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  15 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  16 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  17 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  18 **
  19 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  20 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  21 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  22 ** Copyright in any portions created by third parties is as indicated
  23 ** elsewhere herein. All Rights Reserved.
  24 **
  25 ** Additional Notice Provisions: The application programming interfaces
  26 ** established by SGI in conjunction with the Original Code are The
  27 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  28 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  29 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  30 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  31 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  32 ** published by SGI, but has not been independently verified as being
  33 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  34 **
  35 */
  36
  37 #include "glheader.h"
  38 #include "glxclient.h"
  39 #include "indirect.h"
  40
  41 /**
  42  * Send glPixelStore command to the server
  43  *
  44  * \param gc     Current GLX context
  45  * \param sop    Either \c X_GLsop_PixelStoref or \c X_GLsop_PixelStorei
  46  * \param pname  Selector of which pixel parameter is to be set.
  47  * \param param  Value that \c pname is set to.
  48  *
  49  * \sa __indirect_glPixelStorei,  __indirect_glPixelStoref
  50  */
  51 static void
  52 send_PixelStore( __GLXcontext * gc, unsigned sop, GLenum pname,
  53                  const void * param )
  54 {
  55     Display * const dpy = gc->currentDpy;
  56     const GLuint cmdlen = 8;
  57     if (__builtin_expect(dpy != NULL, 1)) {
  58         GLubyte const * pc = __glXSetupSingleRequest(gc, sop, cmdlen);
  59         (void) memcpy((void *)(pc + 0), (void *)(&pname), 4);
  60         (void) memcpy((void *)(pc + 4), param, 4);
  61         UnlockDisplay(dpy); SyncHandle();
  62     }
  63     return;
  64 }
  65
  66 /*
  67 ** Specify parameters that control the storage format of pixel arrays.
  68 */
  69 void __indirect_glPixelStoref(GLenum pname, GLfloat param)
  70 {
  71     __GLXcontext *gc = __glXGetCurrentContext();
  72     __GLXattribute * state = gc->client_state_private;
  73     Display *dpy = gc->currentDpy;
  74     GLuint a;
  75
  76     if (!dpy) return;
  77
  78     switch (pname) {
  79       case GL_PACK_ROW_LENGTH:
  80         a = (GLuint) (param + 0.5);
  81         if (((GLint) a) < 0) {
  82             __glXSetError(gc, GL_INVALID_VALUE);
  83             return;
  84         }
  85         state->storePack.rowLength = a;
  86         break;
  87       case GL_PACK_IMAGE_HEIGHT:
  88         a = (GLuint) (param + 0.5);
  89         if (((GLint) a) < 0) {
  90             __glXSetError(gc, GL_INVALID_VALUE);
  91             return;
  92         }
  93         state->storePack.imageHeight = a;
  94         break;
  95       case GL_PACK_SKIP_ROWS:
  96         a = (GLuint) (param + 0.5);
  97         if (((GLint) a) < 0) {
  98             __glXSetError(gc, GL_INVALID_VALUE);
  99             return;
 100         }
 101         state->storePack.skipRows = a;
 102         break;
 103       case GL_PACK_SKIP_PIXELS:
 104         a = (GLuint) (param + 0.5);
 105         if (((GLint) a) < 0) {
 106             __glXSetError(gc, GL_INVALID_VALUE);
 107             return;
 108         }
 109         state->storePack.skipPixels = a;
 110         break;
 111       case GL_PACK_SKIP_IMAGES:
 112         a = (GLuint) (param + 0.5);
 113         if (((GLint) a) < 0) {
 114             __glXSetError(gc, GL_INVALID_VALUE);
 115             return;
 116         }
 117         state->storePack.skipImages = a;
 118         break;
 119       case GL_PACK_ALIGNMENT:
 120         a = (GLint) (param + 0.5);
 121         switch (a) {
 122           case 1: case 2: case 4: case 8:
 123             state->storePack.alignment = a;
 124             break;
 125           default:
 126             __glXSetError(gc, GL_INVALID_VALUE);
 127             return;
 128         }
 129         break;
 130       case GL_PACK_SWAP_BYTES:
 131         state->storePack.swapEndian = (param != 0);
 132         break;
 133       case GL_PACK_LSB_FIRST:
 134         state->storePack.lsbFirst = (param != 0);
 135         break;
 136
 137       case GL_UNPACK_ROW_LENGTH:
 138         a = (GLuint) (param + 0.5);
 139         if (((GLint) a) < 0) {
 140             __glXSetError(gc, GL_INVALID_VALUE);
 141             return;
 142         }
 143         state->storeUnpack.rowLength = a;
 144         break;
 145       case GL_UNPACK_IMAGE_HEIGHT:
 146         a = (GLuint) (param + 0.5);
 147         if (((GLint) a) < 0) {
 148             __glXSetError(gc, GL_INVALID_VALUE);
 149             return;
 150         }
 151         state->storeUnpack.imageHeight = a;
 152         break;
 153       case GL_UNPACK_SKIP_ROWS:
 154         a = (GLuint) (param + 0.5);
 155         if (((GLint) a) < 0) {
 156             __glXSetError(gc, GL_INVALID_VALUE);
 157             return;
 158         }
 159         state->storeUnpack.skipRows = a;
 160         break;
 161       case GL_UNPACK_SKIP_PIXELS:
 162         a = (GLuint) (param + 0.5);
 163         if (((GLint) a) < 0) {
 164             __glXSetError(gc, GL_INVALID_VALUE);
 165             return;
 166         }
 167         state->storeUnpack.skipPixels = a;
 168         break;
 169       case GL_UNPACK_SKIP_IMAGES:
 170         a = (GLuint) (param + 0.5);
 171         if (((GLint) a) < 0) {
 172             __glXSetError(gc, GL_INVALID_VALUE);
 173             return;
 174         }
 175         state->storeUnpack.skipImages = a;
 176         break;
 177       case GL_UNPACK_ALIGNMENT:
 178         a = (GLint) (param + 0.5);
 179         switch (a) {
 180           case 1: case 2: case 4: case 8:
 181             state->storeUnpack.alignment = a;
 182             break;
 183           default:
 184             __glXSetError(gc, GL_INVALID_VALUE);
 185             return;
 186         }
 187         break;
 188       case GL_UNPACK_SWAP_BYTES:
 189         state->storeUnpack.swapEndian = (param != 0);
 190         break;
 191       case GL_UNPACK_LSB_FIRST:
 192         state->storeUnpack.lsbFirst = (param != 0);
 193         break;
 194
 195       /* Group all of the pixel store modes that need to be sent to the
 196        * server here.  Care must be used to only send modes to the server that
 197        * won't affect the size of the data sent to or received from the
 198        * server.  GL_PACK_INVERT_MESA is safe in this respect, but other,
 199        * future modes may not be.
 200        */
 201       case GL_PACK_INVERT_MESA:
 202         send_PixelStore( gc, X_GLsop_PixelStoref, pname, & param );
 203         break;
 204
 205       default:
 206         __glXSetError(gc, GL_INVALID_ENUM);
 207         break;
 208     }
 209 }
 210
 211 void __indirect_glPixelStorei(GLenum pname, GLint param)
 212 {
 213     __GLXcontext *gc = __glXGetCurrentContext();
 214     __GLXattribute * state = gc->client_state_private;
 215     Display *dpy = gc->currentDpy;
 216
 217     if (!dpy) return;
 218
 219     switch (pname) {
 220       case GL_PACK_ROW_LENGTH:
 221         if (param < 0) {
 222             __glXSetError(gc, GL_INVALID_VALUE);
 223             return;
 224         }
 225         state->storePack.rowLength = param;
 226         break;
 227       case GL_PACK_IMAGE_HEIGHT:
 228         if (param < 0) {
 229             __glXSetError(gc, GL_INVALID_VALUE);
 230             return;
 231         }
 232         state->storePack.imageHeight = param;
 233         break;
 234       case GL_PACK_SKIP_ROWS:
 235         if (param < 0) {
 236             __glXSetError(gc, GL_INVALID_VALUE);
 237             return;
 238         }
 239         state->storePack.skipRows = param;
 240         break;
 241       case GL_PACK_SKIP_PIXELS:
 242         if (param < 0) {
 243             __glXSetError(gc, GL_INVALID_VALUE);
 244             return;
 245         }
 246         state->storePack.skipPixels = param;
 247         break;
 248       case GL_PACK_SKIP_IMAGES:
 249         if (param < 0) {
 250             __glXSetError(gc, GL_INVALID_VALUE);
 251             return;
 252         }
 253         state->storePack.skipImages = param;
 254         break;
 255       case GL_PACK_ALIGNMENT:
 256         switch (param) {
 257           case 1: case 2: case 4: case 8:
 258             state->storePack.alignment = param;
 259             break;
 260           default:
 261             __glXSetError(gc, GL_INVALID_VALUE);
 262             return;
 263         }
 264         break;
 265       case GL_PACK_SWAP_BYTES:
 266         state->storePack.swapEndian = (param != 0);
 267         break;
 268       case GL_PACK_LSB_FIRST:
 269         state->storePack.lsbFirst = (param != 0);
 270         break;
 271
 272       case GL_UNPACK_ROW_LENGTH:
 273         if (param < 0) {
 274             __glXSetError(gc, GL_INVALID_VALUE);
 275             return;
 276         }
 277         state->storeUnpack.rowLength = param;
 278         break;
 279       case GL_UNPACK_IMAGE_HEIGHT:
 280         if (param < 0) {
 281             __glXSetError(gc, GL_INVALID_VALUE);
 282             return;
 283         }
 284         state->storeUnpack.imageHeight = param;
 285         break;
 286       case GL_UNPACK_SKIP_ROWS:
 287         if (param < 0) {
 288             __glXSetError(gc, GL_INVALID_VALUE);
 289             return;
 290         }
 291         state->storeUnpack.skipRows = param;
 292         break;
 293       case GL_UNPACK_SKIP_PIXELS:
 294         if (param < 0) {
 295             __glXSetError(gc, GL_INVALID_VALUE);
 296             return;
 297         }
 298         state->storeUnpack.skipPixels = param;
 299         break;
 300       case GL_UNPACK_SKIP_IMAGES:
 301         if (param < 0) {
 302             __glXSetError(gc, GL_INVALID_VALUE);
 303             return;
 304         }
 305         state->storeUnpack.skipImages = param;
 306         break;
 307       case GL_UNPACK_ALIGNMENT:
 308         switch (param) {
 309           case 1: case 2: case 4: case 8:
 310             state->storeUnpack.alignment = param;
 311             break;
 312           default:
 313             __glXSetError(gc, GL_INVALID_VALUE);
 314             return;
 315         }
 316         break;
 317       case GL_UNPACK_SWAP_BYTES:
 318         state->storeUnpack.swapEndian = (param != 0);
 319         break;
 320       case GL_UNPACK_LSB_FIRST:
 321         state->storeUnpack.lsbFirst = (param != 0);
 322         break;
 323
 324       /* Group all of the pixel store modes that need to be sent to the
 325        * server here.  Care must be used to only send modes to the server that
 326        * won't affect the size of the data sent to or received from the
 327        * server.  GL_PACK_INVERT_MESA is safe in this respect, but other,
 328        * future modes may not be.
 329        */
 330       case GL_PACK_INVERT_MESA:
 331         send_PixelStore( gc, X_GLsop_PixelStorei, pname, & param );
 332         break;
 333
 334       default:
 335         __glXSetError(gc, GL_INVALID_ENUM);
 336         break;
 337     }
 338 }