xref: /xsrc/external/mit/xorg-server/dist/glx/singlepixswap.c

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

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "glxserver.h"
#include "glxext.h"
#include "singlesize.h"
#include "unpack.h"
#include "indirect_dispatch.h"
#include "indirect_size_get.h"

int
__glXDispSwap_ReadPixels(__GLXclientState * cl, GLbyte * pc)
{
    GLsizei width, height;
    GLenum format, type;
    GLboolean swapBytes, lsbFirst;
    GLint compsize;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;
    char *answer, answerBuffer[200];
    xGLXSingleReply reply = { 0, };

    REQUEST_FIXED_SIZE(xGLXSingleReq, 28);

    __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag);
    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
    if (!cx) {
        return error;
    }

    pc += __GLX_SINGLE_HDR_SIZE;
    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);
    __GLX_SWAP_INT(pc + 12);
    __GLX_SWAP_INT(pc + 16);
    __GLX_SWAP_INT(pc + 20);

    width = *(GLsizei *) (pc + 8);
    height = *(GLsizei *) (pc + 12);
    format = *(GLenum *) (pc + 16);
    type = *(GLenum *) (pc + 20);
    swapBytes = *(GLboolean *) (pc + 24);
    lsbFirst = *(GLboolean *) (pc + 25);
    compsize = __glReadPixels_size(format, type, width, height);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    glPixelStorei(GL_PACK_LSB_FIRST, lsbFirst);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glReadPixels(*(GLint *) (pc + 0), *(GLint *) (pc + 4),
                 *(GLsizei *) (pc + 8), *(GLsizei *) (pc + 12),
                 *(GLenum *) (pc + 16), *(GLenum *) (pc + 20), answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_HEADER();
        __GLX_SEND_VOID_ARRAY(compsize);
    }
    return Success;
}

int
__glXDispSwap_GetTexImage(__GLXclientState * cl, GLbyte * pc)
{
    GLint level, compsize;
    GLenum format, type, target;
    GLboolean swapBytes;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;
    char *answer, answerBuffer[200];
    GLint width = 0, height = 0, depth = 1;
    xGLXSingleReply reply = { 0, };

    REQUEST_FIXED_SIZE(xGLXSingleReq, 20);

    __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag);
    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
    if (!cx) {
        return error;
    }

    pc += __GLX_SINGLE_HDR_SIZE;
    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);
    __GLX_SWAP_INT(pc + 12);

    level = *(GLint *) (pc + 4);
    format = *(GLenum *) (pc + 8);
    type = *(GLenum *) (pc + 12);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 16);

    glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
    glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
    if (target == GL_TEXTURE_3D) {
        glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
    }
    /*
     * The three queries above might fail if we're in a state where queries
     * are illegal, but then width, height, and depth would still be zero anyway.
     */
    compsize =
        __glGetTexImage_size(target, level, format, type, width, height, depth);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glGetTexImage(*(GLenum *) (pc + 0), *(GLint *) (pc + 4),
                  *(GLenum *) (pc + 8), *(GLenum *) (pc + 12), answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SWAP_INT(&width);
        __GLX_SWAP_INT(&height);
        __GLX_SWAP_INT(&depth);
        ((xGLXGetTexImageReply *) &reply)->width = width;
        ((xGLXGetTexImageReply *) &reply)->height = height;
        ((xGLXGetTexImageReply *) &reply)->depth = depth;
        __GLX_SEND_HEADER();
        __GLX_SEND_VOID_ARRAY(compsize);
    }
    return Success;
}

int
__glXDispSwap_GetPolygonStipple(__GLXclientState * cl, GLbyte * pc)
{
    GLboolean lsbFirst;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;
    GLubyte answerBuffer[200];
    char *answer;
    xGLXSingleReply reply = { 0, };

    __GLX_DECLARE_SWAP_VARIABLES;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 4);

    __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag);
    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
    if (!cx) {
        return error;
    }
    pc += __GLX_SINGLE_HDR_SIZE;
    lsbFirst = *(GLboolean *) (pc + 0);

    glPixelStorei(GL_PACK_LSB_FIRST, lsbFirst);
    __GLX_GET_ANSWER_BUFFER(answer, cl, 128, 1);

    __glXClearErrorOccured();
    glGetPolygonStipple((GLubyte *) answer);
    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(128);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_HEADER();
        __GLX_SEND_BYTE_ARRAY(128);
    }
    return Success;
}

static int
GetSeparableFilter(__GLXclientState * cl, GLbyte * pc, GLXContextTag tag)
{
    GLint compsize, compsize2;
    GLenum format, type, target;
    GLboolean swapBytes;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;

    __GLX_DECLARE_SWAP_VARIABLES;
    char *answer, answerBuffer[200];
    GLint width = 0, height = 0;
    xGLXSingleReply reply = { 0, };

    cx = __glXForceCurrent(cl, tag, &error);
    if (!cx) {
        return error;
    }

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);

    format = *(GLenum *) (pc + 4);
    type = *(GLenum *) (pc + 8);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 12);

    /* target must be SEPARABLE_2D, however I guess we can let the GL
       barf on this one.... */

    glGetConvolutionParameteriv(target, GL_CONVOLUTION_WIDTH, &width);
    glGetConvolutionParameteriv(target, GL_CONVOLUTION_HEIGHT, &height);
    /*
     * The two queries above might fail if we're in a state where queries
     * are illegal, but then width and height would still be zero anyway.
     */
    compsize = __glGetTexImage_size(target, 1, format, type, width, 1, 1);
    compsize2 = __glGetTexImage_size(target, 1, format, type, height, 1, 1);

    if ((compsize = safe_pad(compsize)) < 0)
        return BadLength;
    if ((compsize2 = safe_pad(compsize2)) < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, safe_add(compsize, compsize2), 1);
    __glXClearErrorOccured();
    glGetSeparableFilter(*(GLenum *) (pc + 0), *(GLenum *) (pc + 4),
                         *(GLenum *) (pc + 8), answer, answer + compsize, NULL);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize + compsize2);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SWAP_INT(&width);
        __GLX_SWAP_INT(&height);
        ((xGLXGetSeparableFilterReply *) &reply)->width = width;
        ((xGLXGetSeparableFilterReply *) &reply)->height = height;
        __GLX_SEND_VOID_ARRAY(compsize + compsize2);
    }

    return Success;
}

int
__glXDispSwap_GetSeparableFilter(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_SINGLE_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
    return GetSeparableFilter(cl, pc + __GLX_SINGLE_HDR_SIZE, tag);
}

int
__glXDispSwap_GetSeparableFilterEXT(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_VENDPRIV_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 16);
    return GetSeparableFilter(cl, pc + __GLX_VENDPRIV_HDR_SIZE, tag);
}

static int
GetConvolutionFilter(__GLXclientState * cl, GLbyte * pc, GLXContextTag tag)
{
    GLint compsize;
    GLenum format, type, target;
    GLboolean swapBytes;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;

    __GLX_DECLARE_SWAP_VARIABLES;
    char *answer, answerBuffer[200];
    GLint width = 0, height = 0;
    xGLXSingleReply reply = { 0, };

    cx = __glXForceCurrent(cl, tag, &error);
    if (!cx) {
        return error;
    }

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);

    format = *(GLenum *) (pc + 4);
    type = *(GLenum *) (pc + 8);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 12);

    glGetConvolutionParameteriv(target, GL_CONVOLUTION_WIDTH, &width);
    if (target == GL_CONVOLUTION_2D) {
        height = 1;
    }
    else {
        glGetConvolutionParameteriv(target, GL_CONVOLUTION_HEIGHT, &height);
    }
    /*
     * The two queries above might fail if we're in a state where queries
     * are illegal, but then width and height would still be zero anyway.
     */
    compsize = __glGetTexImage_size(target, 1, format, type, width, height, 1);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glGetConvolutionFilter(*(GLenum *) (pc + 0), *(GLenum *) (pc + 4),
                           *(GLenum *) (pc + 8), answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SWAP_INT(&width);
        __GLX_SWAP_INT(&height);
        ((xGLXGetConvolutionFilterReply *) &reply)->width = width;
        ((xGLXGetConvolutionFilterReply *) &reply)->height = height;
        __GLX_SEND_VOID_ARRAY(compsize);
    }

    return Success;
}

int
__glXDispSwap_GetConvolutionFilter(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_SINGLE_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
    return GetConvolutionFilter(cl, pc + __GLX_SINGLE_HDR_SIZE, tag);
}

int
__glXDispSwap_GetConvolutionFilterEXT(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_VENDPRIV_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 16);
    return GetConvolutionFilter(cl, pc + __GLX_VENDPRIV_HDR_SIZE, tag);
}

static int
GetHistogram(__GLXclientState * cl, GLbyte * pc, GLXContextTag tag)
{
    GLint compsize;
    GLenum format, type, target;
    GLboolean swapBytes, reset;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;

    __GLX_DECLARE_SWAP_VARIABLES;
    char *answer, answerBuffer[200];
    GLint width = 0;
    xGLXSingleReply reply = { 0, };

    cx = __glXForceCurrent(cl, tag, &error);
    if (!cx) {
        return error;
    }

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);

    format = *(GLenum *) (pc + 4);
    type = *(GLenum *) (pc + 8);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 12);
    reset = *(GLboolean *) (pc + 13);

    glGetHistogramParameteriv(target, GL_HISTOGRAM_WIDTH, &width);
    /*
     * The one query above might fail if we're in a state where queries
     * are illegal, but then width would still be zero anyway.
     */
    compsize = __glGetTexImage_size(target, 1, format, type, width, 1, 1);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glGetHistogram(target, reset, format, type, answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SWAP_INT(&width);
        ((xGLXGetHistogramReply *) &reply)->width = width;
        __GLX_SEND_VOID_ARRAY(compsize);
    }

    return Success;
}

int
__glXDispSwap_GetHistogram(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_SINGLE_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
    return GetHistogram(cl, pc + __GLX_SINGLE_HDR_SIZE, tag);
}

int
__glXDispSwap_GetHistogramEXT(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_VENDPRIV_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 16);
    return GetHistogram(cl, pc + __GLX_VENDPRIV_HDR_SIZE, tag);
}

static int
GetMinmax(__GLXclientState * cl, GLbyte * pc, GLXContextTag tag)
{
    GLint compsize;
    GLenum format, type, target;
    GLboolean swapBytes, reset;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;

    __GLX_DECLARE_SWAP_VARIABLES;
    char *answer, answerBuffer[200];
    xGLXSingleReply reply = { 0, };

    cx = __glXForceCurrent(cl, tag, &error);
    if (!cx) {
        return error;
    }

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);

    format = *(GLenum *) (pc + 4);
    type = *(GLenum *) (pc + 8);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 12);
    reset = *(GLboolean *) (pc + 13);

    compsize = __glGetTexImage_size(target, 1, format, type, 2, 1, 1);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glGetMinmax(target, reset, format, type, answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SEND_VOID_ARRAY(compsize);
    }

    return Success;
}

int
__glXDispSwap_GetMinmax(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_SINGLE_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
    return GetMinmax(cl, pc + __GLX_SINGLE_HDR_SIZE, tag);
}

int
__glXDispSwap_GetMinmaxEXT(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_VENDPRIV_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 16);
    return GetMinmax(cl, pc + __GLX_VENDPRIV_HDR_SIZE, tag);
}

static int
GetColorTable(__GLXclientState * cl, GLbyte * pc, GLXContextTag tag)
{
    GLint compsize;
    GLenum format, type, target;
    GLboolean swapBytes;
    __GLXcontext *cx;
    ClientPtr client = cl->client;
    int error;

    __GLX_DECLARE_SWAP_VARIABLES;
    char *answer, answerBuffer[200];
    GLint width = 0;
    xGLXSingleReply reply = { 0, };

    cx = __glXForceCurrent(cl, tag, &error);
    if (!cx) {
        return error;
    }

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 4);
    __GLX_SWAP_INT(pc + 8);

    format = *(GLenum *) (pc + 4);
    type = *(GLenum *) (pc + 8);
    target = *(GLenum *) (pc + 0);
    swapBytes = *(GLboolean *) (pc + 12);

    glGetColorTableParameteriv(target, GL_COLOR_TABLE_WIDTH, &width);
    /*
     * The one query above might fail if we're in a state where queries
     * are illegal, but then width would still be zero anyway.
     */
    compsize = __glGetTexImage_size(target, 1, format, type, width, 1, 1);
    if (compsize < 0)
        return BadLength;

    glPixelStorei(GL_PACK_SWAP_BYTES, !swapBytes);
    __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
    __glXClearErrorOccured();
    glGetColorTable(*(GLenum *) (pc + 0), *(GLenum *) (pc + 4),
                    *(GLenum *) (pc + 8), answer);

    if (__glXErrorOccured()) {
        __GLX_BEGIN_REPLY(0);
        __GLX_SWAP_REPLY_HEADER();
    }
    else {
        __GLX_BEGIN_REPLY(compsize);
        __GLX_SWAP_REPLY_HEADER();
        __GLX_SWAP_INT(&width);
        ((xGLXGetColorTableReply *) &reply)->width = width;
        __GLX_SEND_VOID_ARRAY(compsize);
    }

    return Success;
}

int
__glXDispSwap_GetColorTable(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_SINGLE_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXSingleReq, 16);
    return GetColorTable(cl, pc + __GLX_SINGLE_HDR_SIZE, tag);
}

int
__glXDispSwap_GetColorTableSGI(__GLXclientState * cl, GLbyte * pc)
{
    const GLXContextTag tag = __GLX_GET_VENDPRIV_CONTEXT_TAG(pc);
    ClientPtr client = cl->client;

    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 16);
    return GetColorTable(cl, pc + __GLX_VENDPRIV_HDR_SIZE, tag);
}