/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#include "X11SurfaceData.h"
#include <jni.h>
#include <math.h>
#include "Region.h"
#include "fontscalerdefs.h"

#include <X11/extensions/Xrender.h>

/* On Solaris 10 updates 8, 9, the render.h file defines these
 * protocol values but does not define the structs in Xrender.h.
 * Thus in order to get these always defined on Solaris 10
 * we will undefine the symbols if we have determined via the
 * makefiles that Xrender.h is lacking the structs. This will
 * trigger providing our own definitions as on earlier updates.
 * We could assume that *all* Solaris 10 update versions will lack the updated
 * Xrender.h and do this based solely on O/S being any 5.10 version, but this
 * could still change and we'd be broken again as we'd be re-defining them.
 */
#ifdef SOLARIS10_NO_XRENDER_STRUCTS
#undef X_RenderCreateLinearGradient
#undef X_RenderCreateRadialGradient
#endif

#ifndef X_RenderCreateLinearGradient
typedef struct _XLinearGradient {
    XPointFixed p1;
    XPointFixed p2;
} XLinearGradient;
#endif

#ifndef X_RenderCreateRadialGradient
typedef struct _XCircle {
    XFixed x;
    XFixed y;
    XFixed radius;
} XCircle;

typedef struct _XRadialGradient {
    XCircle inner;
    XCircle outer;
} XRadialGradient;
#endif

#ifdef __solaris__
/* Solaris 10 will not have these symbols at runtime */
#include <dlfcn.h>
#include <link.h>

typedef Picture (*XRenderCreateLinearGradientFuncType)
                                     (Display *dpy,
                                     const XLinearGradient *gradient,
                                     const XFixed *stops,
                                     const XRenderColor *colors,
                                     int nstops);

typedef Picture (*XRenderCreateRadialGradientFuncType)
                                     (Display *dpy,
                                     const XRadialGradient *gradient,
                                     const XFixed *stops,
                                     const XRenderColor *colors,
                                     int nstops);

static
XRenderCreateLinearGradientFuncType XRenderCreateLinearGradientFunc = NULL;
static
 XRenderCreateRadialGradientFuncType XRenderCreateRadialGradientFunc = NULL;
#endif

#define BUILD_TRANSFORM_MATRIX(TRANSFORM, M00, M01, M02, M10, M11, M12)                        \
    {                                                                                          \
      TRANSFORM.matrix[0][0] = M00;                                                            \
      TRANSFORM.matrix[0][1] = M01;                                                            \
      TRANSFORM.matrix[0][2] = M02;                                                            \
      TRANSFORM.matrix[1][0] = M10;                                                            \
      TRANSFORM.matrix[1][1] = M11;                                                            \
      TRANSFORM.matrix[1][2] = M12;                                                            \
      TRANSFORM.matrix[2][0] = 0;                                                              \
      TRANSFORM.matrix[2][1] = 0;                                                              \
      TRANSFORM.matrix[2][2] = 1<<16;                                                          \
    }


static jboolean IsXRenderAvailable() {

    void *xrenderlib;

    int major_opcode, first_event, first_error;

    if (!XQueryExtension(awt_display, "RENDER",
                         &major_opcode, &first_event, &first_error)) {
        return JNI_FALSE;
    }

#ifdef __solaris__
    xrenderlib = dlopen("libXrender.so",RTLD_GLOBAL|RTLD_LAZY);
    if (xrenderlib != NULL) {

        XRenderCreateLinearGradientFunc =
            (XRenderCreateLinearGradientFuncType)
            dlsym(xrenderlib, "XRenderCreateLinearGradient");

        XRenderCreateRadialGradientFunc =
            (XRenderCreateRadialGradientFuncType)
            dlsym(xrenderlib, "XRenderCreateRadialGradient");

        if (XRenderCreateLinearGradientFunc == NULL ||
            XRenderCreateRadialGradientFunc == NULL)
        {
            dlclose(xrenderlib);
            return JNI_FALSE;
        }
    }
#endif
    return JNI_TRUE;
}
/*
 * Class:     sun_awt_X11GraphicsEnvironment
 * Method:    initGLX
 * Signature: ()Z
 */
JNIEXPORT jboolean JNICALL
Java_sun_awt_X11GraphicsEnvironment_initXRender
 (JNIEnv *env, jclass x11ge)
{
#ifndef HEADLESS
    static jboolean xrenderAvailable = JNI_FALSE;
    static jboolean firstTime = JNI_TRUE;

    if (firstTime) {
        AWT_LOCK();
        xrenderAvailable = IsXRenderAvailable();
        AWT_UNLOCK();
        firstTime = JNI_FALSE;
    }
    return xrenderAvailable;
#else
    return JNI_FALSE;
#endif /* !HEADLESS */
}


JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_initIDs(JNIEnv *env, jclass cls) {
    char *maskData;
    XImage* defaultImg;
    jfieldID maskImgID;
    jlong fmt8 =
        ptr_to_jlong(XRenderFindStandardFormat(awt_display, PictStandardA8));
    jlong fmt32 =
       ptr_to_jlong(XRenderFindStandardFormat(awt_display, PictStandardARGB32));
    jfieldID a8ID = (*env)->GetStaticFieldID(env, cls, "FMTPTR_A8", "J");
    jfieldID argb32ID = (*env)->GetStaticFieldID(env, cls, "FMTPTR_ARGB32", "J");

    (*env)->SetStaticLongField(env, cls, a8ID, fmt8);
    (*env)->SetStaticLongField(env, cls, argb32ID, fmt32);

    maskData = (char *) malloc(32*32);
    if (maskData == NULL) {
       return;
    }

    defaultImg = XCreateImage(awt_display, NULL, 8, ZPixmap, 0, maskData, 32, 32, 8, 0);
    defaultImg->data = maskData; //required?
    maskImgID = (*env)->GetStaticFieldID(env, cls, "MASK_XIMG", "J");
    (*env)->SetStaticLongField(env, cls, maskImgID, ptr_to_jlong(defaultImg));
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_freeGC
 (JNIEnv *env, jobject this, jlong gc) {
    XFreeGC(awt_display, (GC) jlong_to_ptr(gc));
}

JNIEXPORT jlong JNICALL
Java_sun_java2d_xr_XRBackendNative_createGC
 (JNIEnv *env, jobject this, jint drawable) {
  GC xgc = XCreateGC(awt_display, (Drawable) drawable, 0L, NULL);
  return ptr_to_jlong(xgc);
}

JNIEXPORT jint JNICALL
Java_sun_java2d_xr_XRBackendNative_createPixmap(JNIEnv *env, jobject this,
                                                jint drawable, jint depth,
                                                jint width, jint height) {
    return (jint) XCreatePixmap(awt_display, (Drawable) drawable,
                                width, height, depth);
}

JNIEXPORT jint JNICALL
Java_sun_java2d_xr_XRBackendNative_createPictureNative
 (JNIEnv *env, jclass cls, jint drawable, jlong formatPtr) {
  XRenderPictureAttributes pict_attr;
  return XRenderCreatePicture(awt_display, (Drawable) drawable,
                              (XRenderPictFormat *) jlong_to_ptr(formatPtr),
                               0, &pict_attr);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_freePicture
 (JNIEnv *env, jobject this, jint picture) {
      XRenderFreePicture(awt_display, (Picture) picture);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_freePixmap
 (JNIEnv *env, jobject this, jint pixmap) {
   XFreePixmap(awt_display, (Pixmap) pixmap);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_setPictureRepeat
 (JNIEnv *env, jobject this, jint picture, jint repeat) {
    XRenderPictureAttributes pict_attr;
    pict_attr.repeat = repeat;
    XRenderChangePicture (awt_display, (Picture) picture, CPRepeat, &pict_attr);
}


JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_setGCExposures
 (JNIEnv *env, jobject this, jlong gc, jboolean exposure) {
    XSetGraphicsExposures(awt_display,
                         (GC) jlong_to_ptr(gc), exposure ? True : False); //TODO: ????
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_setGCForeground
 (JNIEnv *env, jobject this, jlong gc, jint pixel) {
    XSetForeground(awt_display, (GC) jlong_to_ptr(gc), (unsigned long) pixel);
}


JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_copyArea
 (JNIEnv *env, jobject this, jint src, jint dst, jlong gc,
  jint srcx, jint srcy, jint width, jint height, jint dstx, jint dsty) {
    XCopyArea(awt_display, (Drawable) src, (Drawable) dst,
             (GC) jlong_to_ptr(gc), srcx, srcy, width, height, dstx, dsty);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_renderComposite
 (JNIEnv *env, jobject this, jbyte op, jint src, jint mask, jint dst,
  jint srcX, jint srcY, jint maskX, jint maskY,
  jint dstX, jint dstY, jint width, jint height) {
    XRenderComposite (awt_display, op,
                      (Picture)src, (Picture)mask, (Picture)dst,
                       srcX, srcY, maskX, maskY, dstX, dstY, width, height);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_renderRectangle
 (JNIEnv *env, jobject this, jint dst, jbyte op,
  jshort red, jshort green, jshort blue, jshort alpha,
  jint x, jint y, jint width, jint height) {
    XRenderColor color;
    color.alpha = alpha;
    color.red = red;
    color.green = green;
    color.blue = blue;
    XRenderFillRectangle(awt_display, op, (Picture) dst, &color,
                         x, y, width, height);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRenderRectanglesNative
 (JNIEnv *env, jclass xsd, jint dst, jbyte op,
  jshort red, jshort green, jshort blue, jshort alpha,
  jintArray rectArray, jint rectCnt) {
    int i;
    jint* rects;
    XRectangle *xRects;
    XRectangle sRects[256];

    XRenderColor color;
    color.alpha = alpha;
    color.red = red;
    color.green = green;
    color.blue = blue;

    if (rectCnt <= 256) {
      xRects = &sRects[0];
    } else {
      xRects = (XRectangle *) malloc(sizeof(XRectangle) * rectCnt);
      if (xRects == NULL) {
        return;
      }
    }

    if ((rects = (jint *) (*env)->GetPrimitiveArrayCritical(env, rectArray, NULL)) == NULL) {
      return;
    }

    for (i=0; i < rectCnt; i++) {
      xRects[i].x = rects[i*4 + 0];
      xRects[i].y = rects[i*4 + 1];
      xRects[i].width = rects[i*4 + 2];
      xRects[i].height = rects[i*4 + 3];
    }

    XRenderFillRectangles(awt_display, op,
                          (Picture) dst, &color, xRects, rectCnt);

    (*env)->ReleasePrimitiveArrayCritical(env, rectArray, rects, JNI_ABORT);
    if (xRects != &sRects[0]) {
      free(xRects);
    }
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRSetTransformNative
 (JNIEnv *env, jclass xsd, jint pic,
  jint m00, jint m01, jint m02, jint m10, jint m11, jint m12) {

  XTransform tr;
  BUILD_TRANSFORM_MATRIX(tr, m00, m01, m02, m10, m11, m12);
  XRenderSetPictureTransform (awt_display, (Picture) pic, &tr);
}

JNIEXPORT jint JNICALL
Java_sun_java2d_xr_XRBackendNative_XRCreateLinearGradientPaintNative
    (JNIEnv *env, jclass xsd, jfloatArray fractionsArray,
     jshortArray pixelsArray, jint x1, jint y1, jint x2, jint y2,
     jint numStops, jint repeat,
     jint m00, jint m01, jint m02, jint m10, jint m11, jint m12) {
   jint i;
   jshort* pixels;
   jfloat* fractions;
   XTransform tr;
   XRenderPictureAttributes pict_attr;
   Picture gradient = 0;
   XRenderColor *colors;
   XFixed *stops;
   XLinearGradient grad;

   if ((pixels = (jshort *)
        (*env)->GetPrimitiveArrayCritical(env, pixelsArray, NULL)) == NULL) {
       return -1;
   }
   if ((fractions = (jfloat *)
       (*env)->GetPrimitiveArrayCritical(env, fractionsArray, NULL)) == NULL) {
       (*env)->ReleasePrimitiveArrayCritical(env,
                                              pixelsArray, pixels, JNI_ABORT);
       return -1;
   }

    grad.p1.x = x1;
    grad.p1.y = y1;
    grad.p2.x = x2;
    grad.p2.y = y2;

    /*TODO optimized & malloc check*/
    colors = (XRenderColor *) malloc(numStops * sizeof(XRenderColor));
    stops =  (XFixed *) malloc(numStops * sizeof(XFixed));

    for (i=0; i < numStops; i++) {
      stops[i] = XDoubleToFixed(fractions[i]);
      colors[i].alpha = pixels[i*4 + 0];
      colors[i].red = pixels[i*4 + 1];
      colors[i].green = pixels[i*4 + 2];
      colors[i].blue = pixels[i*4 + 3];
    }
#ifdef __solaris__
    if (XRenderCreateLinearGradientFunc!=NULL) {
      gradient = (*XRenderCreateLinearGradientFunc)(awt_display, &grad, stops, colors, numStops);
    }
#else
    gradient = XRenderCreateLinearGradient(awt_display, &grad, stops, colors, numStops);
#endif
    free(colors);
    free(stops);

   (*env)->ReleasePrimitiveArrayCritical(env, pixelsArray, pixels, JNI_ABORT);
   (*env)->ReleasePrimitiveArrayCritical(env, fractionsArray, fractions, JNI_ABORT);

    if (gradient != 0) {
        BUILD_TRANSFORM_MATRIX(tr, m00, m01, m02, m10, m11, m12);
        XRenderSetPictureTransform (awt_display, gradient, &tr);
        pict_attr.repeat = repeat;
        XRenderChangePicture (awt_display, gradient, CPRepeat, &pict_attr);
    }

   return (jint) gradient;
}


JNIEXPORT jint JNICALL
Java_sun_java2d_xr_XRBackendNative_XRCreateRadialGradientPaintNative
    (JNIEnv *env, jclass xsd, jfloatArray fractionsArray,
     jshortArray pixelsArray, jint numStops,
     jint innerRadius, jint outerRadius, jint repeat,
     jint m00, jint m01, jint m02, jint m10, jint m11, jint m12) {
   jint i;
   jshort* pixels;
   jfloat* fractions;
   XTransform tr;
   XRenderPictureAttributes pict_attr;
   Picture gradient = 0;
   XRenderColor *colors;
   XFixed *stops;
   XRadialGradient grad;


   if ((pixels =
       (jshort *)(*env)->GetPrimitiveArrayCritical(env, pixelsArray, NULL)) == NULL) {
       return -1;
   }
   if ((fractions = (jfloat *)
        (*env)->GetPrimitiveArrayCritical(env, fractionsArray, NULL)) == NULL) {
       (*env)->ReleasePrimitiveArrayCritical(env,
                                             pixelsArray, pixels, JNI_ABORT);
       return -1; //TODO release pixels first
   }

    grad.inner.x = 0;
    grad.inner.y = 0;
    grad.inner.radius = innerRadius;
    grad.outer.x = 0;
    grad.outer.y = 0;
    grad.outer.radius = outerRadius;

    /*TODO optimized & malloc check*/
    colors = (XRenderColor *) malloc(numStops * sizeof(XRenderColor));
    stops =  (XFixed *) malloc(numStops * sizeof(XFixed));

    for (i=0; i < numStops; i++) {
      stops[i] = XDoubleToFixed(fractions[i]);
      colors[i].alpha = pixels[i*4 + 0];
      colors[i].red = pixels[i*4 + 1];
      colors[i].green = pixels[i*4 + 2];
      colors[i].blue = pixels[i*4 + 3];
    }
#ifdef __solaris__
    if (XRenderCreateRadialGradientFunc != NULL) {
        gradient = (jint) (*XRenderCreateRadialGradientFunc)(awt_display, &grad, stops, colors, numStops);
    }
#else
    gradient = (jint) XRenderCreateRadialGradient(awt_display, &grad, stops, colors, numStops);
#endif
    free(colors);
    free(stops);

   (*env)->ReleasePrimitiveArrayCritical(env, pixelsArray, pixels, JNI_ABORT);
   (*env)->ReleasePrimitiveArrayCritical(env, fractionsArray, fractions, JNI_ABORT);


    if (gradient != 0) {
        BUILD_TRANSFORM_MATRIX(tr, m00, m01, m02, m10, m11, m12);
        XRenderSetPictureTransform (awt_display, gradient, &tr);
        pict_attr.repeat = repeat;
        XRenderChangePicture (awt_display, gradient, CPRepeat, &pict_attr);
    }

   return (jint) gradient;
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_setFilter
 (JNIEnv *env, jobject this, jint picture, jint filter) {

  char * filterName = "fast";

  switch(filter) {
    case 0:
      filterName = "fast";
      break;

    case 1:
      filterName = "good";
      break;

    case 2:
      filterName = "best";
      break;
  }

    XRenderSetPictureFilter(awt_display, (Picture) picture, filterName, NULL, 0);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRSetClipNative
    (JNIEnv *env, jclass xsd, jlong dst,
     jint x1, jint y1, jint x2, jint y2,
     jobject complexclip, jboolean isGC)
{
    int numrects;
    XRectangle rects[256];
    XRectangle *pRect = rects;

    numrects = RegionToYXBandedRectangles(env,
            x1, y1, x2, y2, complexclip,
            &pRect, 256);

    if (isGC == JNI_TRUE) {
      if (dst != (jlong) 0) {
          XSetClipRectangles(awt_display, (GC) jlong_to_ptr(dst), 0, 0, pRect, numrects, YXBanded);
      }
    } else {
       XRenderSetPictureClipRectangles (awt_display, (Picture) dst, 0, 0, pRect, numrects);
    }

    if (pRect != rects) {
        free(pRect);
    }
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_putMaskNative
 (JNIEnv *env, jclass cls, jint drawable, jlong gc, jbyteArray imageData,
  jint sx, jint sy, jint dx, jint dy, jint width, jint height,
  jint maskOff, jint maskScan, jfloat ea, jlong imgPtr) {

    int line, pix;
    char *mask;
    char *defaultData;
    XImage *defaultImg, *img;
    jboolean imageFits;

    if ((mask = (char *)
         (*env)->GetPrimitiveArrayCritical(env, imageData, NULL)) == NULL) {
        return;
     }

    defaultImg = (XImage *) jlong_to_ptr(imgPtr);

    if (ea != 1.0f) {
        for (line=0; line < height; line++) {
            for (pix=0; pix < width; pix++) {
                int index = maskScan*line + pix + maskOff;
                mask[index] = (((unsigned char) mask[index])*ea);
            }
        }
    }

    /*
    * 1. If existing XImage and supplied buffer match, only adjust the data pointer
    * 2. If existing XImage is large enough to hold the data but does not match in
    *    scan the data is copied to fit the XImage.
    * 3. If data is larger than the existing XImage a new temporary XImage is
    *    allocated.
    * The default XImage is optimized for the AA tiles, which are currently 32x32.
    */
    defaultData = defaultImg->data;
    img = defaultImg;
    imageFits = defaultImg->width >= width && defaultImg->height >= height;

    if (imageFits &&
        maskOff == defaultImg->xoffset && maskScan == defaultImg->bytes_per_line) {
        defaultImg->data = mask;
    } else {
        if (imageFits) {
            for (line=0; line < height; line++) {
                for (pix=0; pix < width; pix++) {
                    img->data[line*img->bytes_per_line + pix] =
                        (unsigned char) (mask[maskScan*line + pix + maskOff]);
                }
            }
        } else {
            img = XCreateImage(awt_display, NULL, 8, ZPixmap,
                               maskOff, mask, maskScan, height, 8, 0);
        }
    }

    XPutImage(awt_display, (Pixmap) drawable, (GC) jlong_to_ptr(gc),
              img, 0, 0, 0, 0, width, height);
    (*env)->ReleasePrimitiveArrayCritical(env, imageData, mask, JNI_ABORT);

    if (img != defaultImg) {
        img->data = NULL;
        XDestroyImage(img);
    }
    defaultImg->data = defaultData;
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRAddGlyphsNative
 (JNIEnv *env, jclass cls, jint glyphSet,
  jlongArray glyphInfoPtrsArray, jint glyphCnt,
  jbyteArray pixelDataArray, int pixelDataLength) {
    jlong *glyphInfoPtrs;
    unsigned char *pixelData;
    int i;

    XGlyphInfo *xginfo = (XGlyphInfo *) malloc(sizeof(XGlyphInfo) * glyphCnt);
    Glyph *gid = (Glyph *) malloc(sizeof(Glyph) * glyphCnt);

    if (xginfo == NULL || gid == NULL) {
      return;
    }

    if ((glyphInfoPtrs = (jlong *) (*env)->GetPrimitiveArrayCritical(env, glyphInfoPtrsArray, NULL)) == NULL) {
        return;
    }

    if ((pixelData = (unsigned char *)
        (*env)->GetPrimitiveArrayCritical(env, pixelDataArray, NULL)) == NULL) {
        (*env)->ReleasePrimitiveArrayCritical(env,
                                  glyphInfoPtrsArray, glyphInfoPtrs, JNI_ABORT);
        return;
    }

    for (i=0; i < glyphCnt; i++) {
      GlyphInfo *jginfo = (GlyphInfo *) jlong_to_ptr(glyphInfoPtrs[i]);

      gid[i] = (Glyph) (0xffffffff & ((unsigned int) jginfo->cellInfo));
      xginfo[i].x = (-jginfo->topLeftX);
      xginfo[i].y = (-jginfo->topLeftY);
      xginfo[i].width = jginfo->width;
      xginfo[i].height = jginfo->height;
      xginfo[i].xOff = round(jginfo->advanceX);
      xginfo[i].yOff = round(jginfo->advanceY);
    }

    XRenderAddGlyphs(awt_display, glyphSet, &gid[0], &xginfo[0], glyphCnt,
                     pixelData, pixelDataLength);

    (*env)->ReleasePrimitiveArrayCritical(env, glyphInfoPtrsArray, glyphInfoPtrs, JNI_ABORT);
    (*env)->ReleasePrimitiveArrayCritical(env, pixelDataArray, pixelData, JNI_ABORT);

    free(xginfo);
    free(gid);
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRFreeGlyphsNative
 (JNIEnv *env, jclass cls, jint glyphSet, jintArray gidArray, jint glyphCnt) {
    jint *gids;
    int i;

    if ((gids = (jint *) (*env)->GetPrimitiveArrayCritical(env, gidArray, NULL)) == NULL) {
        return;
    }

    XRenderFreeGlyphs (awt_display, (GlyphSet) glyphSet, (Glyph *) gids, glyphCnt);

    (*env)->ReleasePrimitiveArrayCritical(env, gidArray, gids, JNI_ABORT);
}

JNIEXPORT jint JNICALL
Java_sun_java2d_xr_XRBackendNative_XRenderCreateGlyphSetNative
 (JNIEnv *env, jclass cls, jlong format) {
  return XRenderCreateGlyphSet(awt_display, (XRenderPictFormat *) jlong_to_ptr(format));
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_XRenderCompositeTextNative
 (JNIEnv *env, jclass cls, jint op, jint src, jint dst, jlong maskFmt,
  jintArray eltArray, jintArray  glyphIDArray, jint eltCnt, jint glyphCnt) {
    jint i;
    jint *ids;
    jint *elts;
    XGlyphElt32 *xelts;
    Glyph *xids;
    XGlyphElt32 selts[24];
    Glyph sids[256];
    int charCnt = 0;

    if (eltCnt <= 24) {
      xelts = &selts[0];
    }else {
      xelts = (XGlyphElt32 *) malloc(sizeof(XGlyphElt32) * eltCnt);
    }

    if (glyphCnt <= 256) {
      xids = &sids[0];
    }else {
      xids = (Glyph *) malloc(sizeof(Glyph) * glyphCnt);
    }

    if ((ids = (jint *) (*env)->GetPrimitiveArrayCritical(env, glyphIDArray, NULL)) == NULL) {
      return;
    }
    if ((elts = (jint *)
          (*env)->GetPrimitiveArrayCritical(env, eltArray, NULL)) == NULL) {
        (*env)->ReleasePrimitiveArrayCritical(env,
                                              glyphIDArray, ids, JNI_ABORT);
      return;
    }

    for (i=0; i < glyphCnt; i++) {
      xids[i] = (Glyph) ids[i];
    }

    for (i=0; i < eltCnt; i++) {
      xelts[i].nchars = elts[i*4 + 0];
      xelts[i].xOff = elts[i*4 + 1];
      xelts[i].yOff = elts[i*4 + 2];
      xelts[i].glyphset = (GlyphSet) elts[i*4 + 3];
      xelts[i].chars = (unsigned int *) &xids[charCnt];

      charCnt += xelts[i].nchars;
    }

    XRenderCompositeText32(awt_display, op, (Picture) src, (Picture) dst,
                           (XRenderPictFormat *) jlong_to_ptr(maskFmt),
                            0, 0, 0, 0, xelts, eltCnt);

    (*env)->ReleasePrimitiveArrayCritical(env, glyphIDArray, ids, JNI_ABORT);
    (*env)->ReleasePrimitiveArrayCritical(env, eltArray, elts, JNI_ABORT);

    if (xelts != &selts[0]) {
      free(xelts);
    }

    if (xids != &sids[0]) {
      free(xids);
    }
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_setGCMode
 (JNIEnv *env, jobject this, jlong gc, jboolean copy) {
  GC xgc = (GC) jlong_to_ptr(gc);

  if (copy == JNI_TRUE) {
    XSetFunction(awt_display, xgc, GXcopy);
  } else {
    XSetFunction(awt_display, xgc, GXxor);
  }
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_GCRectanglesNative
 (JNIEnv *env, jclass xsd, jint dst, jlong gc,
  jintArray rectArray, jint rectCnt) {
    int i;
    jint* rects;
    XRectangle *xRects;
    XRectangle sRects[256];

    if (rectCnt <= 256) {
      xRects = &sRects[0];
    } else {
      xRects = (XRectangle *) malloc(sizeof(XRectangle) * rectCnt);
      if (xRects == NULL) {
        return;
      }
    }

    if ((rects = (jint *) (*env)->GetPrimitiveArrayCritical(env, rectArray, NULL)) == NULL) {
      return;
    }

    for (i=0; i < rectCnt; i++) {
      xRects[i].x = rects[i*4 + 0];
      xRects[i].y = rects[i*4 + 1];
      xRects[i].width = rects[i*4 + 2];
      xRects[i].height = rects[i*4 + 3];
    }

    XFillRectangles(awt_display, (Drawable) dst, (GC) jlong_to_ptr(gc), xRects, rectCnt);

    (*env)->ReleasePrimitiveArrayCritical(env, rectArray, rects, JNI_ABORT);
    if (xRects != &sRects[0]) {
      free(xRects);
    }
}

JNIEXPORT void JNICALL
Java_sun_java2d_xr_XRBackendNative_renderCompositeTrapezoidsNative
 (JNIEnv *env, jclass cls, jbyte op, jint src, jlong maskFmt,
 jint dst, jint srcX, jint srcY, jintArray  trapArray) {
    jint *traps;

    if ((traps = (jint *) (*env)->GetPrimitiveArrayCritical(env, trapArray, NULL)) == NULL) {
      return;
    }

    XRenderCompositeTrapezoids(awt_display, op, (Picture) src, (Picture) dst,
                               (XRenderPictFormat *) jlong_to_ptr(maskFmt),
                               srcX, srcY, (XTrapezoid *) (traps+5), traps[0]);

    (*env)->ReleasePrimitiveArrayCritical(env, trapArray, traps, JNI_ABORT);
}