| 1 | /* |
| 2 | * $Id: HBITMAP.java,v 1.3 2005/10/28 18:53:16 hastings Exp $ |
| 3 | * |
| 4 | * (c) Copyright, Moebius Solutions, Inc., 2004 |
| 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This material may be reproduced by or for the U. S. Government |
| 9 | * pursuant to the copyright license under the clause at |
| 10 | * DFARS 252.227-7014 (OCT 2001). |
| 11 | */ |
| 12 | |
| 13 | package com.moesol.bindings.platform_sdk.windows_api; |
| 14 | |
| 15 | import java.awt.image.BufferedImage; |
| 16 | import java.awt.image.SinglePixelPackedSampleModel; |
| 17 | |
| 18 | /** |
| 19 | * Holds a Win32 HBITMAP |
| 20 | */ |
| 21 | public class HBITMAP extends HANDLE { |
| 22 | HBITMAP(long bitmap, boolean temporary) { |
| 23 | super(bitmap, temporary); |
| 24 | } |
| 25 | HBITMAP(long bitmap) { |
| 26 | super(bitmap); |
| 27 | } |
| 28 | /** |
| 29 | * Create a depth 1 bitmap from an array of bytes, one bit per pixel |
| 30 | * eight bits per byte. |
| 31 | * |
| 32 | * @param width - number of bits in a scanline |
| 33 | * @param height - number of scanlines |
| 34 | * @param bits - array of bytes with length = width * height / 8 or null. |
| 35 | * @return handle to a native bitmap |
| 36 | */ |
| 37 | public static HBITMAP createBitmap(int width, int height, byte[] bits) { |
| 38 | checkBits(width, height, bits); |
| 39 | long r = jni_createBitmap(width, height, bits); |
| 40 | if (r == 0) { throw new RuntimeException("createBitmap failed"); } |
| 41 | |
| 42 | HBITMAP rbm = new HBITMAP(r); |
| 43 | rbm.m_width = width; |
| 44 | rbm.m_height = height; |
| 45 | |
| 46 | return rbm; |
| 47 | } |
| 48 | public static HBITMAP createCompatibleBitmap(HDC hdc, int width, int height) { |
| 49 | long r = jni_createCompatibleBitmap(hdc._getHandle(), width, height); |
| 50 | if (r == 0) { throw new RuntimeException("createCompatibleBitmap failed"); } |
| 51 | |
| 52 | HBITMAP rbm = new HBITMAP(r); |
| 53 | rbm.m_width = width; |
| 54 | rbm.m_height = height; |
| 55 | return rbm; |
| 56 | } |
| 57 | public static HBITMAP createDIBitmap( |
| 58 | HDC hdc, BITMAPINFOHEADER bmih, |
| 59 | int fdwInit, |
| 60 | int[] lpbInit, |
| 61 | BITMAPINFO lpbmi, |
| 62 | int fuUsage |
| 63 | ) { |
| 64 | long r = jni_createDIBBitmap(hdc._getHandle(), bmih._getStructureBytes(), |
| 65 | fdwInit, |
| 66 | lpbInit, |
| 67 | lpbmi.get_bmiHeader()._getStructureBytes(), |
| 68 | fuUsage); |
| 69 | if (r == 0) { |
| 70 | throw new RuntimeException("createDIBitmap failed"); |
| 71 | } |
| 72 | HBITMAP rbm = new HBITMAP(r); |
| 73 | rbm.m_width = bmih.get_biWidth(); |
| 74 | rbm.m_height = bmih.get_biHeight(); |
| 75 | return rbm; |
| 76 | } |
| 77 | /** |
| 78 | * Create a Win32 Device Dependent Bitmap from a java.awt.image.BufferedImage. |
| 79 | * Currently only images of type TYPE_INT_ARGB are supported. |
| 80 | * |
| 81 | * @param hdc |
| 82 | * @param bi - BufferedImage of type TYPE_INT_ARGB. |
| 83 | * @param clear_alpha - if true resets the alpha byte to zero |
| 84 | * @return handle to a Device Dependent Bitmap |
| 85 | */ |
| 86 | public static HBITMAP createDIBitmap(HDC hdc, BufferedImage bi, boolean clear_alpha) { |
| 87 | BITMAPINFO bmi = new BITMAPINFO(0); |
| 88 | BITMAPINFOHEADER bmih = bmi.get_bmiHeader(); |
| 89 | bmih.set_biSize(BITMAPINFOHEADER.sizeof()); |
| 90 | bmih.set_biWidth(bi.getWidth()); |
| 91 | bmih.set_biHeight(-bi.getHeight()); |
| 92 | bmih.set_biPlanes((short)1); |
| 93 | bmih.set_biBitCount((short)32); |
| 94 | bmih.set_biCompression(BITMAPINFOHEADER.BI_RGB); |
| 95 | |
| 96 | SinglePixelPackedSampleModel sm = (SinglePixelPackedSampleModel)bi.getSampleModel(); |
| 97 | int[] bits = bi.getRGB(0, 0, bi.getWidth(), bi.getHeight(), null, 0, sm.getScanlineStride()); |
| 98 | if (clear_alpha) { |
| 99 | int n = bits.length; |
| 100 | for (int i = 0; i < n; i++) { |
| 101 | bits[i] &= (0x00FFFFFF & bits[i]); |
| 102 | } |
| 103 | } |
| 104 | return HBITMAP.createDIBitmap(hdc, bmi.get_bmiHeader(), |
| 105 | HBITMAP.CBM_INIT, bits, bmi, HBITMAP.DIB_RGB_COLORS); |
| 106 | } |
| 107 | public static HBITMAP createDIBitmap(HDC hdc, BufferedImage bi) { |
| 108 | return createDIBitmap(hdc, bi, false); |
| 109 | } |
| 110 | |
| 111 | public int getHeight() { |
| 112 | return m_height; |
| 113 | } |
| 114 | public int getWidth() { |
| 115 | return m_width; |
| 116 | } |
| 117 | |
| 118 | public void setBits(byte[] bits) { |
| 119 | checkBitsForHandle(bits); |
| 120 | boolean r = jni_setBits(_getHandle(), bits, bits.length); |
| 121 | if (!r) { throw new RuntimeException("setBits failed"); } |
| 122 | } |
| 123 | public void getBits(byte[] bits) { |
| 124 | checkBitsForHandle(bits); |
| 125 | boolean r = jni_getBits(_getHandle(), bits, bits.length); |
| 126 | if (!r) { throw new RuntimeException("getBits failed"); } |
| 127 | } |
| 128 | public void destroyBitmap(){ |
| 129 | m_width = 0; |
| 130 | m_height = 0; |
| 131 | boolean r = jni_destroyBitmap(_getHandle()); |
| 132 | if (!r) { throw new RuntimeException("destroyBitmap failed"); } |
| 133 | detach(); |
| 134 | } |
| 135 | |
| 136 | public int getObject(BITMAP [] out_bitmap) { |
| 137 | BITMAP bm = new BITMAP(); |
| 138 | int bytes = jni_getObject(_getHandle(), bm._getStructureBytes()); |
| 139 | assert(bm.get_bmBitsPixel() != 0); |
| 140 | out_bitmap[0] = bm; |
| 141 | return bytes; |
| 142 | } |
| 143 | |
| 144 | private native int jni_getObject(long handle, byte [] bm_bytes); |
| 145 | |
| 146 | public static final int CBM_INIT = 0x04; |
| 147 | public static final int DIB_RGB_COLORS = 0; |
| 148 | public static final int DIB_PAL_COLORS = 1; |
| 149 | |
| 150 | private static void checkBits(int width, int height, byte[] bits) { |
| 151 | if (bits == null) { |
| 152 | // create an uninitialized bitmap of width, height |
| 153 | return; |
| 154 | } |
| 155 | if (bits.length != width * Math.abs(height) / 8) { |
| 156 | throw new IllegalArgumentException("bits is wrong size"); |
| 157 | } |
| 158 | } |
| 159 | private void checkBitsForHandle(byte[] bits) { |
| 160 | BITMAP[] bm = { null }; |
| 161 | getObject(bm); |
| 162 | int expect = bm[0].get_bmWidthBytes() * bm[0].get_bmWidth(); |
| 163 | if (expect != bits.length) { |
| 164 | throw new IllegalArgumentException("bits is wrong size"); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | private static native long jni_createBitmap(int width, int height, byte[] bits); |
| 169 | private static native long jni_createCompatibleBitmap(long handle, int width, int height); |
| 170 | private static native long jni_createDIBBitmap(long handle, byte[] bmih, int fdwInit, int[] lpbInit, byte[] lpbmi, int fuUsage); |
| 171 | |
| 172 | private native boolean jni_destroyBitmap(long handle); |
| 173 | private native boolean jni_setBits(long handle, byte[] bits, int length); |
| 174 | private native boolean jni_getBits(long handle, byte[] bits, int length); |
| 175 | |
| 176 | private int m_width; |
| 177 | private int m_height; |
| 178 | } |