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/* $XFree86: xc/lib/GL/glx/pixelstore.c,v 1.4 2004/01/28 18:11:43 alanh Exp $ */
/*
** 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.
**
*/
#include "glxclient.h"
#include "indirect.h"
#if !defined __GNUC__ || __GNUC__ < 3
# define __builtin_expect(x, y) x
#endif
/**
* Send glPixelStore command to the server
*
* \param gc Current GLX context
* \param sop Either \c X_GLsop_PixelStoref or \c X_GLsop_PixelStorei
* \param pname Selector of which pixel parameter is to be set.
* \param param Value that \c pname is set to.
*
* \sa __indirect_glPixelStorei, __indirect_glPixelStoref
*/
static void
send_PixelStore( __GLXcontext * gc, unsigned sop, GLenum pname,
const void * param )
{
Display * const dpy = gc->currentDpy;
const GLuint cmdlen = 8;
if (__builtin_expect(dpy != NULL, 1)) {
GLubyte const * pc = __glXSetupSingleRequest(gc, sop, cmdlen);
(void) memcpy((void *)(pc + 0), (void *)(&pname), 4);
(void) memcpy((void *)(pc + 4), param, 4);
UnlockDisplay(dpy); SyncHandle();
}
return;
}
/*
** Specify parameters that control the storage format of pixel arrays.
*/
void __indirect_glPixelStoref(GLenum pname, GLfloat param)
{
__GLXcontext *gc = __glXGetCurrentContext();
__GLXattribute * state = gc->client_state_private;
Display *dpy = gc->currentDpy;
GLuint a;
if (!dpy) return;
switch (pname) {
case GL_PACK_ROW_LENGTH:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.rowLength = a;
break;
case GL_PACK_IMAGE_HEIGHT:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.imageHeight = a;
break;
case GL_PACK_SKIP_ROWS:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipRows = a;
break;
case GL_PACK_SKIP_PIXELS:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipPixels = a;
break;
case GL_PACK_SKIP_IMAGES:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipImages = a;
break;
case GL_PACK_ALIGNMENT:
a = (GLint) (param + 0.5);
switch (a) {
case 1: case 2: case 4: case 8:
state->storePack.alignment = a;
break;
default:
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
break;
case GL_PACK_SWAP_BYTES:
state->storePack.swapEndian = (param != 0);
break;
case GL_PACK_LSB_FIRST:
state->storePack.lsbFirst = (param != 0);
break;
case GL_UNPACK_ROW_LENGTH:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.rowLength = a;
break;
case GL_UNPACK_IMAGE_HEIGHT:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.imageHeight = a;
break;
case GL_UNPACK_SKIP_ROWS:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipRows = a;
break;
case GL_UNPACK_SKIP_PIXELS:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipPixels = a;
break;
case GL_UNPACK_SKIP_IMAGES:
a = (GLuint) (param + 0.5);
if (((GLint) a) < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipImages = a;
break;
case GL_UNPACK_ALIGNMENT:
a = (GLint) (param + 0.5);
switch (a) {
case 1: case 2: case 4: case 8:
state->storeUnpack.alignment = a;
break;
default:
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
break;
case GL_UNPACK_SWAP_BYTES:
state->storeUnpack.swapEndian = (param != 0);
break;
case GL_UNPACK_LSB_FIRST:
state->storeUnpack.lsbFirst = (param != 0);
break;
/* Group all of the pixel store modes that need to be sent to the
* server here. Care must be used to only send modes to the server that
* won't affect the size of the data sent to or received from the
* server. GL_PACK_INVERT_MESA is safe in this respect, but other,
* future modes may not be.
*/
case GL_PACK_INVERT_MESA:
send_PixelStore( gc, X_GLsop_PixelStoref, pname, & param );
break;
default:
__glXSetError(gc, GL_INVALID_ENUM);
break;
}
}
void __indirect_glPixelStorei(GLenum pname, GLint param)
{
__GLXcontext *gc = __glXGetCurrentContext();
__GLXattribute * state = gc->client_state_private;
Display *dpy = gc->currentDpy;
if (!dpy) return;
switch (pname) {
case GL_PACK_ROW_LENGTH:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.rowLength = param;
break;
case GL_PACK_IMAGE_HEIGHT:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.imageHeight = param;
break;
case GL_PACK_SKIP_ROWS:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipRows = param;
break;
case GL_PACK_SKIP_PIXELS:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipPixels = param;
break;
case GL_PACK_SKIP_IMAGES:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storePack.skipImages = param;
break;
case GL_PACK_ALIGNMENT:
switch (param) {
case 1: case 2: case 4: case 8:
state->storePack.alignment = param;
break;
default:
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
break;
case GL_PACK_SWAP_BYTES:
state->storePack.swapEndian = (param != 0);
break;
case GL_PACK_LSB_FIRST:
state->storePack.lsbFirst = (param != 0);
break;
case GL_UNPACK_ROW_LENGTH:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.rowLength = param;
break;
case GL_UNPACK_IMAGE_HEIGHT:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.imageHeight = param;
break;
case GL_UNPACK_SKIP_ROWS:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipRows = param;
break;
case GL_UNPACK_SKIP_PIXELS:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipPixels = param;
break;
case GL_UNPACK_SKIP_IMAGES:
if (param < 0) {
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
state->storeUnpack.skipImages = param;
break;
case GL_UNPACK_ALIGNMENT:
switch (param) {
case 1: case 2: case 4: case 8:
state->storeUnpack.alignment = param;
break;
default:
__glXSetError(gc, GL_INVALID_VALUE);
return;
}
break;
case GL_UNPACK_SWAP_BYTES:
state->storeUnpack.swapEndian = (param != 0);
break;
case GL_UNPACK_LSB_FIRST:
state->storeUnpack.lsbFirst = (param != 0);
break;
/* Group all of the pixel store modes that need to be sent to the
* server here. Care must be used to only send modes to the server that
* won't affect the size of the data sent to or received from the
* server. GL_PACK_INVERT_MESA is safe in this respect, but other,
* future modes may not be.
*/
case GL_PACK_INVERT_MESA:
send_PixelStore( gc, X_GLsop_PixelStorei, pname, & param );
break;
default:
__glXSetError(gc, GL_INVALID_ENUM);
break;
}
}
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