src/org/xwt/plat/GCJ.cc

   1 // Copyright 2002 Adam Megacz, see the COPYING file for licensing [LGPL]
   2
   3 // Inclusions /////////////////////////////////////////////////////////
   4
   5 #include <gcj/cni.h>
   6 #include <gcj/array.h>
   7 extern "C" {
   8
   9 // hack for broken Solaris headers
  10 #define _WCHAR_T
  11
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <setjmp.h>
  15 #include "jpeglib.h"
  16 }
  17 #include <org/xwt/plat/GCJ.h>
  18 #include <java/io/InputStream.h>
  19 #include <java/io/ByteArrayInputStream.h>
  20 #include <java/lang/RuntimeException.h>
  21 #include <org/xwt/plat/GCJ.h>
  22 #include <org/xwt/plat/GCJ$JPEG.h>
  23
  24
  25
  26 // builtin.xwar /////////////////////////////////////////////////////////
  27
  28 extern unsigned char builtin_xwar[];
  29 extern int builtin_xwar_length;
  30
  31 java::io::InputStream* org::xwt::plat::GCJ::_getBuiltinInputStream() {
  32     jbyteArray ret = JvNewByteArray(builtin_xwar_length);
  33     memcpy(elements(ret), builtin_xwar, builtin_xwar_length);
  34     return new java::io::ByteArrayInputStream(ret);
  35 }
  36
  37
  38 // freetype.mips /////////////////////////////////////////////////////////
  39
  40 extern unsigned char freetype_mips[];
  41 extern int freetype_mips_length;
  42
  43 java::io::InputStream* org::xwt::plat::GCJ::_getFreetypeInputStream() {
  44     jbyteArray ret = JvNewByteArray(freetype_mips_length);
  45     memcpy(elements(ret), freetype_mips, freetype_mips_length);
  46     return new java::io::ByteArrayInputStream(ret);
  47 }
  48
  49
  50
  51
  52 // JPEG ////////////////////////////////////////////////////////////////
  53
  54 #define INPUT_BUF_SIZE (1024 * 16)
  55
  56 typedef struct {
  57     struct jpeg_source_mgr pub;
  58     org::xwt::plat::GCJ$JPEG* myself;
  59 } source_manager;
  60
  61 void jpeg_error_handler (j_common_ptr cinfo) {
  62   jstring message = JvNewStringLatin1(cinfo->err->jpeg_message_table[cinfo->err->msg_code]);
  63   throw new java::lang::RuntimeException(message);
  64 }
  65
  66 void term_source (j_decompress_ptr cinfo) { }
  67 void init_source (j_decompress_ptr cinfo) { }
  68
  69 boolean fill_input_buffer (j_decompress_ptr cinfo) {
  70   source_manager* src = (source_manager*)cinfo->src;
  71   jint nbytes = src->myself->is->read(src->myself->buffer, 0, INPUT_BUF_SIZE);
  72   if (nbytes <= 0) {
  73     // the JPEG library specifically suggests padding the end with EOF markers
  74     elements(src->myself->buffer)[0] = (jbyte)0xFF;
  75     elements(src->myself->buffer)[1] = (jbyte)JPEG_EOI;
  76     nbytes = 2;
  77   }
  78   src->pub.next_input_byte = (JOCTET*)elements(src->myself->buffer);
  79   src->pub.bytes_in_buffer = nbytes;
  80   return 1;
  81 }
  82
  83 void skip_input_data (j_decompress_ptr cinfo, long num_bytes) {
  84   source_manager* src = (source_manager*)cinfo->src;
  85   if (num_bytes > 0) {
  86     while (num_bytes > (long) src->pub.bytes_in_buffer) {
  87       num_bytes -= (long) src->pub.bytes_in_buffer;
  88       (void) fill_input_buffer(cinfo);
  89     }
  90     src->pub.next_input_byte += (size_t) num_bytes;
  91     src->pub.bytes_in_buffer -= (size_t) num_bytes;
  92   }
  93 }
  94
  95 void org::xwt::plat::GCJ$JPEG::nativeDecompress() {
  96     struct jpeg_decompress_struct cinfo;
  97
  98     // set up our error handler
  99     struct jpeg_error_mgr error_handler;
 100     cinfo.err = jpeg_std_error(&error_handler);
 101     error_handler.error_exit = &jpeg_error_handler;
 102
 103     jpeg_create_decompress(&cinfo);
 104     try {
 105         source_manager src;
 106         buffer = JvNewByteArray(INPUT_BUF_SIZE);
 107         src.pub.init_source = init_source;
 108         src.pub.fill_input_buffer = fill_input_buffer;
 109         src.pub.skip_input_data = skip_input_data;
 110         src.pub.resync_to_restart = jpeg_resync_to_restart;
 111         src.pub.term_source = term_source;
 112         src.myself = this;
 113         src.pub.next_input_byte = (JOCTET*)elements(buffer);
 114         src.pub.bytes_in_buffer = 0;
 115         cinfo.src = (jpeg_source_mgr*)&src;
 116
 117         jpeg_read_header(&cinfo, 1);
 118         jpeg_start_decompress(&cinfo);
 119         width = cinfo.output_width;
 120         height = cinfo.output_height;
 121         data = JvNewIntArray(width * height);
 122
 123         while (cinfo.output_scanline < cinfo.output_height) {
 124           JSAMPLE* dest = (JSAMPLE*)(elements(data) + cinfo.output_scanline * width);
 125           jpeg_read_scanlines(&cinfo, &dest, 1);
 126         }
 127
 128         jpeg_finish_decompress(&cinfo);
 129
 130         // fill in the alpha components
 131         for(int i=0; i<data->length; i++)
 132           elements(data)[i] |= (jint)0xff000000;
 133
 134     } catch (java::lang::Throwable* t) {
 135         jpeg_destroy_decompress(&cinfo);
 136         throw t;
 137     }
 138     jpeg_destroy_decompress(&cinfo);
 139 }
 140
 141 // C++ new/delete operators (JvMalloc never fails)
 142 void* operator new(size_t size) { return JvMalloc(size); }
 143 void* operator new[](size_t size) { return JvMalloc(size);}
 144 void operator delete(void *p) { JvFree(p); }
 145 void operator delete[](void *p) { JvFree(p); }