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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"
+
+/**
+ * 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;
+ }
+}