xref: /xsrc/external/mit/xorg-server/dist/glx/render2swap.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 "unpack.h"
#include "indirect_size.h"
#include "indirect_dispatch.h"

void
__glXDispSwap_Map1f(GLbyte * pc)
{
    GLint order, k;
    GLfloat u1, u2, *points;
    GLenum target;
    GLint compsize;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 12);
    __GLX_SWAP_FLOAT(pc + 4);
    __GLX_SWAP_FLOAT(pc + 8);

    target = *(GLenum *) (pc + 0);
    order = *(GLint *) (pc + 12);
    u1 = *(GLfloat *) (pc + 4);
    u2 = *(GLfloat *) (pc + 8);
    points = (GLfloat *) (pc + 16);
    k = __glMap1f_size(target);

    if (order <= 0 || k < 0) {
        /* Erroneous command. */
        compsize = 0;
    }
    else {
        compsize = order * k;
    }
    __GLX_SWAP_FLOAT_ARRAY(points, compsize);

    glMap1f(target, u1, u2, k, order, points);
}

void
__glXDispSwap_Map2f(GLbyte * pc)
{
    GLint uorder, vorder, ustride, vstride, k;
    GLfloat u1, u2, v1, v2, *points;
    GLenum target;
    GLint compsize;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;

    __GLX_SWAP_INT(pc + 0);
    __GLX_SWAP_INT(pc + 12);
    __GLX_SWAP_INT(pc + 24);
    __GLX_SWAP_FLOAT(pc + 4);
    __GLX_SWAP_FLOAT(pc + 8);
    __GLX_SWAP_FLOAT(pc + 16);
    __GLX_SWAP_FLOAT(pc + 20);

    target = *(GLenum *) (pc + 0);
    uorder = *(GLint *) (pc + 12);
    vorder = *(GLint *) (pc + 24);
    u1 = *(GLfloat *) (pc + 4);
    u2 = *(GLfloat *) (pc + 8);
    v1 = *(GLfloat *) (pc + 16);
    v2 = *(GLfloat *) (pc + 20);
    points = (GLfloat *) (pc + 28);

    k = __glMap2f_size(target);
    ustride = vorder * k;
    vstride = k;

    if (vorder <= 0 || uorder <= 0 || k < 0) {
        /* Erroneous command. */
        compsize = 0;
    }
    else {
        compsize = uorder * vorder * k;
    }
    __GLX_SWAP_FLOAT_ARRAY(points, compsize);

    glMap2f(target, u1, u2, ustride, uorder, v1, v2, vstride, vorder, points);
}

void
__glXDispSwap_Map1d(GLbyte * pc)
{
    GLint order, k, compsize;
    GLenum target;
    GLdouble u1, u2, *points;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;

    __GLX_SWAP_DOUBLE(pc + 0);
    __GLX_SWAP_DOUBLE(pc + 8);
    __GLX_SWAP_INT(pc + 16);
    __GLX_SWAP_INT(pc + 20);

    target = *(GLenum *) (pc + 16);
    order = *(GLint *) (pc + 20);
    k = __glMap1d_size(target);
    if (order <= 0 || k < 0) {
        /* Erroneous command. */
        compsize = 0;
    }
    else {
        compsize = order * k;
    }
    __GLX_GET_DOUBLE(u1, pc);
    __GLX_GET_DOUBLE(u2, pc + 8);
    __GLX_SWAP_DOUBLE_ARRAY(pc + 24, compsize);
    pc += 24;

#ifdef __GLX_ALIGN64
    if (((unsigned long) pc) & 7) {
        /*
         ** Copy the doubles up 4 bytes, trashing the command but aligning
         ** the data in the process
         */
        __GLX_MEM_COPY(pc - 4, pc, compsize * 8);
        points = (GLdouble *) (pc - 4);
    }
    else {
        points = (GLdouble *) pc;
    }
#else
    points = (GLdouble *) pc;
#endif
    glMap1d(target, u1, u2, k, order, points);
}

void
__glXDispSwap_Map2d(GLbyte * pc)
{
    GLdouble u1, u2, v1, v2, *points;
    GLint uorder, vorder, ustride, vstride, k, compsize;
    GLenum target;

    __GLX_DECLARE_SWAP_VARIABLES;
    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;

    __GLX_SWAP_DOUBLE(pc + 0);
    __GLX_SWAP_DOUBLE(pc + 8);
    __GLX_SWAP_DOUBLE(pc + 16);
    __GLX_SWAP_DOUBLE(pc + 24);
    __GLX_SWAP_INT(pc + 32);
    __GLX_SWAP_INT(pc + 36);
    __GLX_SWAP_INT(pc + 40);

    target = *(GLenum *) (pc + 32);
    uorder = *(GLint *) (pc + 36);
    vorder = *(GLint *) (pc + 40);
    k = __glMap2d_size(target);
    if (vorder <= 0 || uorder <= 0 || k < 0) {
        /* Erroneous command. */
        compsize = 0;
    }
    else {
        compsize = uorder * vorder * k;
    }
    __GLX_GET_DOUBLE(u1, pc);
    __GLX_GET_DOUBLE(u2, pc + 8);
    __GLX_GET_DOUBLE(v1, pc + 16);
    __GLX_GET_DOUBLE(v2, pc + 24);
    __GLX_SWAP_DOUBLE_ARRAY(pc + 44, compsize);
    pc += 44;
    ustride = vorder * k;
    vstride = k;

#ifdef __GLX_ALIGN64
    if (((unsigned long) pc) & 7) {
        /*
         ** Copy the doubles up 4 bytes, trashing the command but aligning
         ** the data in the process
         */
        __GLX_MEM_COPY(pc - 4, pc, compsize * 8);
        points = (GLdouble *) (pc - 4);
    }
    else {
        points = (GLdouble *) pc;
    }
#else
    points = (GLdouble *) pc;
#endif
    glMap2d(target, u1, u2, ustride, uorder, v1, v2, vstride, vorder, points);
}

static void
swapArray(GLint numVals, GLenum datatype,
          GLint stride, GLint numVertexes, GLbyte * pc)
{
    int i, j;

    __GLX_DECLARE_SWAP_VARIABLES;

    switch (datatype) {
    case GL_BYTE:
    case GL_UNSIGNED_BYTE:
        /* don't need to swap */
        return;
    case GL_SHORT:
    case GL_UNSIGNED_SHORT:
        for (i = 0; i < numVertexes; i++) {
            GLshort *pVal = (GLshort *) pc;

            for (j = 0; j < numVals; j++) {
                __GLX_SWAP_SHORT(&pVal[j]);
            }
            pc += stride;
        }
        break;
    case GL_INT:
    case GL_UNSIGNED_INT:
        for (i = 0; i < numVertexes; i++) {
            GLint *pVal = (GLint *) pc;

            for (j = 0; j < numVals; j++) {
                __GLX_SWAP_INT(&pVal[j]);
            }
            pc += stride;
        }
        break;
    case GL_FLOAT:
        for (i = 0; i < numVertexes; i++) {
            GLfloat *pVal = (GLfloat *) pc;

            for (j = 0; j < numVals; j++) {
                __GLX_SWAP_FLOAT(&pVal[j]);
            }
            pc += stride;
        }
        break;
    case GL_DOUBLE:
        for (i = 0; i < numVertexes; i++) {
            GLdouble *pVal = (GLdouble *) pc;

            for (j = 0; j < numVals; j++) {
                __GLX_SWAP_DOUBLE(&pVal[j]);
            }
            pc += stride;
        }
        break;
    default:
        return;
    }
}

void
__glXDispSwap_DrawArrays(GLbyte * pc)
{
    __GLXdispatchDrawArraysHeader *hdr = (__GLXdispatchDrawArraysHeader *) pc;
    __GLXdispatchDrawArraysComponentHeader *compHeader;
    GLint numVertexes = hdr->numVertexes;
    GLint numComponents = hdr->numComponents;
    GLenum primType = hdr->primType;
    GLint stride = 0;
    int i;

    __GLX_DECLARE_SWAP_VARIABLES;

    __GLX_SWAP_INT(&numVertexes);
    __GLX_SWAP_INT(&numComponents);
    __GLX_SWAP_INT(&primType);

    pc += sizeof(__GLXdispatchDrawArraysHeader);
    compHeader = (__GLXdispatchDrawArraysComponentHeader *) pc;

    /* compute stride (same for all component arrays) */
    for (i = 0; i < numComponents; i++) {
        GLenum datatype = compHeader[i].datatype;
        GLint numVals = compHeader[i].numVals;
        GLenum component = compHeader[i].component;

        __GLX_SWAP_INT(&datatype);
        __GLX_SWAP_INT(&numVals);
        __GLX_SWAP_INT(&component);

        stride += __GLX_PAD(numVals * __glXTypeSize(datatype));
    }

    pc += numComponents * sizeof(__GLXdispatchDrawArraysComponentHeader);

    /* set up component arrays */
    for (i = 0; i < numComponents; i++) {
        GLenum datatype = compHeader[i].datatype;
        GLint numVals = compHeader[i].numVals;
        GLenum component = compHeader[i].component;

        __GLX_SWAP_INT(&datatype);
        __GLX_SWAP_INT(&numVals);
        __GLX_SWAP_INT(&component);

        swapArray(numVals, datatype, stride, numVertexes, pc);

        switch (component) {
        case GL_VERTEX_ARRAY:
            glEnableClientState(GL_VERTEX_ARRAY);
            glVertexPointer(numVals, datatype, stride, pc);
            break;
        case GL_NORMAL_ARRAY:
            glEnableClientState(GL_NORMAL_ARRAY);
            glNormalPointer(datatype, stride, pc);
            break;
        case GL_COLOR_ARRAY:
            glEnableClientState(GL_COLOR_ARRAY);
            glColorPointer(numVals, datatype, stride, pc);
            break;
        case GL_INDEX_ARRAY:
            glEnableClientState(GL_INDEX_ARRAY);
            glIndexPointer(datatype, stride, pc);
            break;
        case GL_TEXTURE_COORD_ARRAY:
            glEnableClientState(GL_TEXTURE_COORD_ARRAY);
            glTexCoordPointer(numVals, datatype, stride, pc);
            break;
        case GL_EDGE_FLAG_ARRAY:
            glEnableClientState(GL_EDGE_FLAG_ARRAY);
            glEdgeFlagPointer(stride, (const GLboolean *) pc);
            break;
        case GL_SECONDARY_COLOR_ARRAY:
        {
            PFNGLSECONDARYCOLORPOINTERPROC SecondaryColorPointerEXT =
                __glGetProcAddress("glSecondaryColorPointerEXT");
            glEnableClientState(GL_SECONDARY_COLOR_ARRAY);
            SecondaryColorPointerEXT(numVals, datatype, stride, pc);
            break;
        }
        case GL_FOG_COORD_ARRAY:
        {
            PFNGLFOGCOORDPOINTERPROC FogCoordPointerEXT =
                __glGetProcAddress("glFogCoordPointerEXT");
            glEnableClientState(GL_FOG_COORD_ARRAY);
            FogCoordPointerEXT(datatype, stride, pc);
            break;
        }
        default:
            break;
        }

        pc += __GLX_PAD(numVals * __glXTypeSize(datatype));
    }

    glDrawArrays(primType, 0, numVertexes);

    /* turn off anything we might have turned on */
    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_NORMAL_ARRAY);
    glDisableClientState(GL_COLOR_ARRAY);
    glDisableClientState(GL_INDEX_ARRAY);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glDisableClientState(GL_EDGE_FLAG_ARRAY);
    glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
    glDisableClientState(GL_FOG_COORD_ARRAY);
}