1/*
2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <stdlib.h>
27
28#include "SurfaceData.h"
29#include "sun_awt_image_DataBufferNative.h"
30
31#include "jni_util.h"
32#include "debug_trace.h"
33#include <stdio.h>
34
35unsigned char *DBN_GetPixelPointer(JNIEnv *env, jint x, int y,
36                                   SurfaceDataRasInfo *lockInfo,
37                                   SurfaceDataOps *ops, int lockFlag)
38{
39    if (ops == NULL) {
40        return NULL;
41    }
42
43    lockInfo->bounds.x1 = x;
44    lockInfo->bounds.y1 = y;
45    lockInfo->bounds.x2 = x + 1;
46    lockInfo->bounds.y2 = y + 1;
47    if (ops->Lock(env, ops, lockInfo, lockFlag) != SD_SUCCESS) {
48        return NULL;
49    }
50    ops->GetRasInfo(env, ops, lockInfo);
51    if (lockInfo->rasBase) {
52        unsigned char *pixelPtr = (
53            (unsigned char*)lockInfo->rasBase +
54            (x * lockInfo->pixelStride + y * lockInfo->scanStride));
55        return pixelPtr;
56    }
57    SurfaceData_InvokeRelease(env, ops, lockInfo);
58    SurfaceData_InvokeUnlock(env, ops, lockInfo);
59    return NULL;
60}
61
62/*
63 * Class:     sun_awt_image_DataBufferNative
64 * Method:    getElem
65 * Signature:
66 */
67JNIEXPORT jint JNICALL
68Java_sun_awt_image_DataBufferNative_getElem(JNIEnv *env, jobject dbn,
69                                            jint x, jint y, jobject sd)
70{
71    jint returnVal = -1;
72    unsigned char *pixelPtr;
73    SurfaceDataRasInfo lockInfo;
74    SurfaceDataOps *ops;
75    lockInfo.rasBase = NULL;
76
77    ops = SurfaceData_GetOps(env, sd);
78    JNU_CHECK_EXCEPTION_RETURN(env, -1);
79
80    if (!(pixelPtr = DBN_GetPixelPointer(env, x, y, &lockInfo,
81                                         ops, SD_LOCK_READ)))
82    {
83        return returnVal;
84    }
85    switch (lockInfo.pixelStride) {
86    case 4:
87        returnVal = *(int *)pixelPtr;
88        break;
89    /* REMIND: do we need a 3-byte case (for 24-bit) here? */
90    case 2:
91        returnVal = *(unsigned short *)pixelPtr;
92        break;
93    case 1:
94        returnVal = *pixelPtr;
95        break;
96    default:
97        break;
98    }
99    SurfaceData_InvokeRelease(env, ops, &lockInfo);
100    SurfaceData_InvokeUnlock(env, ops, &lockInfo);
101    return returnVal;
102}
103
104
105/*
106 * Class:     sun_awt_image_DataBufferNative
107 * Method:    setElem
108 * Signature:
109 */
110JNIEXPORT void JNICALL
111Java_sun_awt_image_DataBufferNative_setElem(JNIEnv *env, jobject dbn,
112                                            jint x, jint y, jint val, jobject sd)
113{
114    SurfaceDataRasInfo lockInfo;
115    SurfaceDataOps *ops;
116    unsigned char *pixelPtr;
117    lockInfo.rasBase = NULL;
118
119    ops = SurfaceData_GetOps(env, sd);
120    JNU_CHECK_EXCEPTION(env);
121
122    if (!(pixelPtr = DBN_GetPixelPointer(env, x, y, &lockInfo,
123                                         ops, SD_LOCK_WRITE)))
124    {
125        return;
126    }
127
128    switch (lockInfo.pixelStride) {
129    case 4:
130        *(int *)pixelPtr = val;
131        break;
132    /* REMIND: do we need a 3-byte case (for 24-bit) here? */
133    case 2:
134        *(unsigned short *)pixelPtr = (unsigned short)val;
135        break;
136    case 1:
137        *pixelPtr = (unsigned char)val;
138        break;
139    default:
140        break;
141    }
142    SurfaceData_InvokeRelease(env, ops, &lockInfo);
143    SurfaceData_InvokeUnlock(env, ops, &lockInfo);
144}
145