X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fxwt%2Fplat%2FGCJ.cc;h=fef47a5eefacb4cf15fcae84b30924bd0e45c0f5;hb=63080366bcef40f25ed20462441e8ff2ccad3649;hp=c26e860823f14293efda9c66aa6f98a368c3ea37;hpb=d1eaa4a249ea87155336d4898c25dd2e27bbf50d;p=org.ibex.core.git

diff --git a/src/org/xwt/plat/GCJ.cc b/src/org/xwt/plat/GCJ.cc
index c26e860..fef47a5 100644
--- a/src/org/xwt/plat/GCJ.cc
+++ b/src/org/xwt/plat/GCJ.cc
@@ -1 +1,115 @@
-         
+// Copyright 2002 Adam Megacz, see the COPYING file for licensing [LGPL]
+
+// Inclusions /////////////////////////////////////////////////////////
+
+#include <gcj/cni.h>
+#include <gcj/array.h>
+extern "C" {
+#include <stdlib.h>
+#include <stdio.h>
+#include <setjmp.h>
+#include "jpeglib.h"
+}
+#include <org/xwt/plat/GCJ.h>
+#include <java/io/InputStream.h>
+#include <java/io/ByteArrayInputStream.h>
+#include <java/lang/RuntimeException.h>
+#include <org/xwt/plat/GCJ.h>
+#include <org/xwt/plat/GCJ$JPEG.h>
+
+
+
+// JPEG ////////////////////////////////////////////////////////////////
+
+#define INPUT_BUF_SIZE (1024 * 16)
+
+typedef struct {
+    struct jpeg_source_mgr pub;
+    org::xwt::plat::GCJ$JPEG* myself;
+} source_manager;
+
+void jpeg_error_handler (j_common_ptr cinfo) {
+  jstring message = JvNewStringLatin1(cinfo->err->jpeg_message_table[cinfo->err->msg_code]);
+  throw new java::lang::RuntimeException(message);
+}
+
+void term_source (j_decompress_ptr cinfo) { }
+void init_source (j_decompress_ptr cinfo) { }
+
+boolean fill_input_buffer (j_decompress_ptr cinfo) {
+  source_manager* src = (source_manager*)cinfo->src;
+  jint nbytes = src->myself->is->read(src->myself->buffer, 0, INPUT_BUF_SIZE);
+  if (nbytes <= 0) {
+    // the JPEG library specifically suggests padding the end with EOF markers
+    elements(src->myself->buffer)[0] = (jbyte)0xFF;
+    elements(src->myself->buffer)[1] = (jbyte)JPEG_EOI;
+    nbytes = 2;
+  }
+  src->pub.next_input_byte = (JOCTET*)elements(src->myself->buffer);
+  src->pub.bytes_in_buffer = nbytes;
+  return 1;
+}
+
+void skip_input_data (j_decompress_ptr cinfo, long num_bytes) {
+  source_manager* src = (source_manager*)cinfo->src;
+  if (num_bytes > 0) {
+    while (num_bytes > (long) src->pub.bytes_in_buffer) {
+      num_bytes -= (long) src->pub.bytes_in_buffer;
+      (void) fill_input_buffer(cinfo);
+    }
+    src->pub.next_input_byte += (size_t) num_bytes;
+    src->pub.bytes_in_buffer -= (size_t) num_bytes;
+  }
+}
+
+void org::xwt::plat::GCJ$JPEG::nativeDecompress() {
+    struct jpeg_decompress_struct cinfo;
+  
+    // set up our error handler
+    struct jpeg_error_mgr error_handler;
+    cinfo.err = jpeg_std_error(&error_handler);
+    error_handler.error_exit = &jpeg_error_handler;
+    
+    jpeg_create_decompress(&cinfo);
+    try {
+	source_manager src;
+	buffer = JvNewByteArray(INPUT_BUF_SIZE);
+	src.pub.init_source = init_source;
+	src.pub.fill_input_buffer = fill_input_buffer;
+	src.pub.skip_input_data = skip_input_data;
+	src.pub.resync_to_restart = jpeg_resync_to_restart;
+	src.pub.term_source = term_source;
+	src.myself = this;
+	src.pub.next_input_byte = (JOCTET*)elements(buffer);
+	src.pub.bytes_in_buffer = 0;
+	cinfo.src = (jpeg_source_mgr*)&src;
+
+	jpeg_read_header(&cinfo, 1);
+	jpeg_start_decompress(&cinfo);
+	width = cinfo.output_width;
+	height = cinfo.output_height;
+	data = JvNewIntArray(width * height);
+
+	while (cinfo.output_scanline < cinfo.output_height) {
+	  JSAMPLE* dest = (JSAMPLE*)(elements(data) + cinfo.output_scanline * width);
+	  jpeg_read_scanlines(&cinfo, &dest, 1);
+	}
+	
+	jpeg_finish_decompress(&cinfo);
+
+	// fill in the alpha components
+	for(int i=0; i<data->length; i++)
+	  elements(data)[i] |= (jint)0xff000000;
+
+    } catch (java::lang::Throwable* t) {
+        jpeg_destroy_decompress(&cinfo);
+        throw t;
+    }
+    jpeg_destroy_decompress(&cinfo);
+}
+
+// C++ new/delete operators (JvMalloc never fails)
+void* operator new(size_t size) { return JvMalloc(size); }
+void* operator new[](size_t size) { return JvMalloc(size);}
+void operator delete(void *p) { JvFree(p); }
+void operator delete[](void *p) { JvFree(p); }