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 "glxclient.h"
  38 #include "indirect.h"
  39
  40 /**
  41  * Send glPixelStore command to the server
  42  *
  43  * \param gc     Current GLX context
  44  * \param sop    Either \c X_GLsop_PixelStoref or \c X_GLsop_PixelStorei
  45  * \param pname  Selector of which pixel parameter is to be set.
  46  * \param param  Value that \c pname is set to.
  47  *
  48  * \sa __indirect_glPixelStorei,  __indirect_glPixelStoref
  49  */
  50 static void
  51 send_PixelStore( __GLXcontext * gc, unsigned sop, GLenum pname,
  52                  const void * param )
  53 {
  54     Display * const dpy = gc->currentDpy;
  55     const GLuint cmdlen = 8;
  56     if (__builtin_expect(dpy != NULL, 1)) {
  57         GLubyte const * pc = __glXSetupSingleRequest(gc, sop, cmdlen);
  58         (void) memcpy((void *)(pc + 0), (void *)(&pname), 4);
  59         (void) memcpy((void *)(pc + 4), param, 4);
  60         UnlockDisplay(dpy); SyncHandle();
  61     }
  62     return;
  63 }
  64
  65 /*
  66 ** Specify parameters that control the storage format of pixel arrays.
  67 */
  68 void __indirect_glPixelStoref(GLenum pname, GLfloat param)
  69 {
  70     __GLXcontext *gc = __glXGetCurrentContext();
  71     __GLXattribute * state = gc->client_state_private;
  72     Display *dpy = gc->currentDpy;
  73     GLuint a;
  74
  75     if (!dpy) return;
  76
  77     switch (pname) {
  78       case GL_PACK_ROW_LENGTH:
  79         a = (GLuint) (param + 0.5);
  80         if (((GLint) a) < 0) {
  81             __glXSetError(gc, GL_INVALID_VALUE);
  82             return;
  83         }
  84         state->storePack.rowLength = a;
  85         break;
  86       case GL_PACK_IMAGE_HEIGHT:
  87         a = (GLuint) (param + 0.5);
  88         if (((GLint) a) < 0) {
  89             __glXSetError(gc, GL_INVALID_VALUE);
  90             return;
  91         }
  92         state->storePack.imageHeight = a;
  93         break;
  94       case GL_PACK_SKIP_ROWS:
  95         a = (GLuint) (param + 0.5);
  96         if (((GLint) a) < 0) {
  97             __glXSetError(gc, GL_INVALID_VALUE);
  98             return;
  99         }
 100         state->storePack.skipRows = a;
 101         break;
 102       case GL_PACK_SKIP_PIXELS:
 103         a = (GLuint) (param + 0.5);
 104         if (((GLint) a) < 0) {
 105             __glXSetError(gc, GL_INVALID_VALUE);
 106             return;
 107         }
 108         state->storePack.skipPixels = a;
 109         break;
 110       case GL_PACK_SKIP_IMAGES:
 111         a = (GLuint) (param + 0.5);
 112         if (((GLint) a) < 0) {
 113             __glXSetError(gc, GL_INVALID_VALUE);
 114             return;
 115         }
 116         state->storePack.skipImages = a;
 117         break;
 118       case GL_PACK_ALIGNMENT:
 119         a = (GLint) (param + 0.5);
 120         switch (a) {
 121           case 1: case 2: case 4: case 8:
 122             state->storePack.alignment = a;
 123             break;
 124           default:
 125             __glXSetError(gc, GL_INVALID_VALUE);
 126             return;
 127         }
 128         break;
 129       case GL_PACK_SWAP_BYTES:
 130         state->storePack.swapEndian = (param != 0);
 131         break;
 132       case GL_PACK_LSB_FIRST:
 133         state->storePack.lsbFirst = (param != 0);
 134         break;
 135
 136       case GL_UNPACK_ROW_LENGTH:
 137         a = (GLuint) (param + 0.5);
 138         if (((GLint) a) < 0) {
 139             __glXSetError(gc, GL_INVALID_VALUE);
 140             return;
 141         }
 142         state->storeUnpack.rowLength = a;
 143         break;
 144       case GL_UNPACK_IMAGE_HEIGHT:
 145         a = (GLuint) (param + 0.5);
 146         if (((GLint) a) < 0) {
 147             __glXSetError(gc, GL_INVALID_VALUE);
 148             return;
 149         }
 150         state->storeUnpack.imageHeight = a;
 151         break;
 152       case GL_UNPACK_SKIP_ROWS:
 153         a = (GLuint) (param + 0.5);
 154         if (((GLint) a) < 0) {
 155             __glXSetError(gc, GL_INVALID_VALUE);
 156             return;
 157         }
 158         state->storeUnpack.skipRows = a;
 159         break;
 160       case GL_UNPACK_SKIP_PIXELS:
 161         a = (GLuint) (param + 0.5);
 162         if (((GLint) a) < 0) {
 163             __glXSetError(gc, GL_INVALID_VALUE);
 164             return;
 165         }
 166         state->storeUnpack.skipPixels = a;
 167         break;
 168       case GL_UNPACK_SKIP_IMAGES:
 169         a = (GLuint) (param + 0.5);
 170         if (((GLint) a) < 0) {
 171             __glXSetError(gc, GL_INVALID_VALUE);
 172             return;
 173         }
 174         state->storeUnpack.skipImages = a;
 175         break;
 176       case GL_UNPACK_ALIGNMENT:
 177         a = (GLint) (param + 0.5);
 178         switch (a) {
 179           case 1: case 2: case 4: case 8:
 180             state->storeUnpack.alignment = a;
 181             break;
 182           default:
 183             __glXSetError(gc, GL_INVALID_VALUE);
 184             return;
 185         }
 186         break;
 187       case GL_UNPACK_SWAP_BYTES:
 188         state->storeUnpack.swapEndian = (param != 0);
 189         break;
 190       case GL_UNPACK_LSB_FIRST:
 191         state->storeUnpack.lsbFirst = (param != 0);
 192         break;
 193
 194       /* Group all of the pixel store modes that need to be sent to the
 195        * server here.  Care must be used to only send modes to the server that
 196        * won't affect the size of the data sent to or received from the
 197        * server.  GL_PACK_INVERT_MESA is safe in this respect, but other,
 198        * future modes may not be.
 199        */
 200       case GL_PACK_INVERT_MESA:
 201         send_PixelStore( gc, X_GLsop_PixelStoref, pname, & param );
 202         break;
 203
 204       default:
 205         __glXSetError(gc, GL_INVALID_ENUM);
 206         break;
 207     }
 208 }
 209
 210 void __indirect_glPixelStorei(GLenum pname, GLint param)
 211 {
 212     __GLXcontext *gc = __glXGetCurrentContext();
 213     __GLXattribute * state = gc->client_state_private;
 214     Display *dpy = gc->currentDpy;
 215
 216     if (!dpy) return;
 217
 218     switch (pname) {
 219       case GL_PACK_ROW_LENGTH:
 220         if (param < 0) {
 221             __glXSetError(gc, GL_INVALID_VALUE);
 222             return;
 223         }
 224         state->storePack.rowLength = param;
 225         break;
 226       case GL_PACK_IMAGE_HEIGHT:
 227         if (param < 0) {
 228             __glXSetError(gc, GL_INVALID_VALUE);
 229             return;
 230         }
 231         state->storePack.imageHeight = param;
 232         break;
 233       case GL_PACK_SKIP_ROWS:
 234         if (param < 0) {
 235             __glXSetError(gc, GL_INVALID_VALUE);
 236             return;
 237         }
 238         state->storePack.skipRows = param;
 239         break;
 240       case GL_PACK_SKIP_PIXELS:
 241         if (param < 0) {
 242             __glXSetError(gc, GL_INVALID_VALUE);
 243             return;
 244         }
 245         state->storePack.skipPixels = param;
 246         break;
 247       case GL_PACK_SKIP_IMAGES:
 248         if (param < 0) {
 249             __glXSetError(gc, GL_INVALID_VALUE);
 250             return;
 251         }
 252         state->storePack.skipImages = param;
 253         break;
 254       case GL_PACK_ALIGNMENT:
 255         switch (param) {
 256           case 1: case 2: case 4: case 8:
 257             state->storePack.alignment = param;
 258             break;
 259           default:
 260             __glXSetError(gc, GL_INVALID_VALUE);
 261             return;
 262         }
 263         break;
 264       case GL_PACK_SWAP_BYTES:
 265         state->storePack.swapEndian = (param != 0);
 266         break;
 267       case GL_PACK_LSB_FIRST:
 268         state->storePack.lsbFirst = (param != 0);
 269         break;
 270
 271       case GL_UNPACK_ROW_LENGTH:
 272         if (param < 0) {
 273             __glXSetError(gc, GL_INVALID_VALUE);
 274             return;
 275         }
 276         state->storeUnpack.rowLength = param;
 277         break;
 278       case GL_UNPACK_IMAGE_HEIGHT:
 279         if (param < 0) {
 280             __glXSetError(gc, GL_INVALID_VALUE);
 281             return;
 282         }
 283         state->storeUnpack.imageHeight = param;
 284         break;
 285       case GL_UNPACK_SKIP_ROWS:
 286         if (param < 0) {
 287             __glXSetError(gc, GL_INVALID_VALUE);
 288             return;
 289         }
 290         state->storeUnpack.skipRows = param;
 291         break;
 292       case GL_UNPACK_SKIP_PIXELS:
 293         if (param < 0) {
 294             __glXSetError(gc, GL_INVALID_VALUE);
 295             return;
 296         }
 297         state->storeUnpack.skipPixels = param;
 298         break;
 299       case GL_UNPACK_SKIP_IMAGES:
 300         if (param < 0) {
 301             __glXSetError(gc, GL_INVALID_VALUE);
 302             return;
 303         }
 304         state->storeUnpack.skipImages = param;
 305         break;
 306       case GL_UNPACK_ALIGNMENT:
 307         switch (param) {
 308           case 1: case 2: case 4: case 8:
 309             state->storeUnpack.alignment = param;
 310             break;
 311           default:
 312             __glXSetError(gc, GL_INVALID_VALUE);
 313             return;
 314         }
 315         break;
 316       case GL_UNPACK_SWAP_BYTES:
 317         state->storeUnpack.swapEndian = (param != 0);
 318         break;
 319       case GL_UNPACK_LSB_FIRST:
 320         state->storeUnpack.lsbFirst = (param != 0);
 321         break;
 322
 323       /* Group all of the pixel store modes that need to be sent to the
 324        * server here.  Care must be used to only send modes to the server that
 325        * won't affect the size of the data sent to or received from the
 326        * server.  GL_PACK_INVERT_MESA is safe in this respect, but other,
 327        * future modes may not be.
 328        */
 329       case GL_PACK_INVERT_MESA:
 330         send_PixelStore( gc, X_GLsop_PixelStorei, pname, & param );
 331         break;
 332
 333       default:
 334         __glXSetError(gc, GL_INVALID_ENUM);
 335         break;
 336     }
 337 }