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