undo experiment with object orientation

openscad.pro

@@ -232,7 +232,6 @@ HEADERS += src/version_check.h \
            src/svg.h \
            \
            src/lodepng.h \
-           src/OffscreenContext.h \
            src/OffscreenView.h \
            src/fbo.h \
            src/imageutils.h \
@@ -306,16 +305,16 @@ SOURCES += src/version_check.cc \
            src/mainwin.cc
 
 unix:!macx {
-  SOURCES += src/OffscreenContextGLX.cc
   SOURCES += src/imageutils-lodepng.cc
+  SOURCES += src/OffscreenContextGLX.cc
 }
 macx {
-  SOURCES += src/OffscreenContext.mm
   SOURCES += src/imageutils-macosx.cc
+  SOURCES += src/OffscreenContextCGL.mm
 }
 win32* {
-  SOURCES += src/OffscreenContextWGL.cc
   SOURCES += src/imageutils-lodepng.cc
+  SOURCES += src/OffscreenContextWGL.cc
 }
 
 opencsg {

src/OffscreenContext.h

@@ -1,7 +1,7 @@
 #ifndef OFFSCREENCONTEXT_H_
 #define OFFSCREENCONTEXT_H_
 
-#include <iostream>         // for error output
+#include <iostream>
 #include <string>
 
 struct OffscreenContext *create_offscreen_context(int w, int h);

src/OffscreenView.h

@@ -9,6 +9,7 @@
 #include <stdint.h>
 #endif
 #include "system-gl.h"
+#include <iostream>
 
 class OffscreenView
 {
@@ -24,6 +25,7 @@ public:
 	void setupOrtho(bool offset=false);
 	void paintGL();
 	bool save(const char *filename);
+	bool save(std::ostream &output);
 	std::string getInfo();
 
 	GLint shaderinfo[11];

src/export_png.cc

@@ -17,6 +17,7 @@ void export_png_with_cgal(CGAL_Nef_polyhedron *root_N, std::ostream &output)
 		csgInfo.glview = new OffscreenView(512,512);
 	} catch (int error) {
 		fprintf(stderr,"Can't create OpenGL OffscreenView. Code: %i.\n", error);
+		return;
 	}
 	CGALRenderer cgalRenderer(*root_N);
 

src/imageutils-lodepng.cc

@@ -1,35 +1,16 @@
+#include "imageutils.h"
 #include "lodepng.h"
 #include <stdio.h>
 #include <stdlib.h>
 
 bool write_png(std::ostream &output, unsigned char *pixels, int width, int height)
 {
+  //encoder.settings.zlibsettings.windowSize = 2048;
+  //LodePNG_Text_add(&encoder.infoPng.text, "Comment", "Created with LodePNG");
   size_t dataout_size = -1;
   unsigned char *dataout = (unsigned char *)malloc(width*height*4);
   LodePNG_encode(&dataout, &dataout_size, pixels, width, height, LCT_RGBA, 8);
-	output.write( dataout, dataout_size );;
+	output.write( reinterpret_cast<const char*>(dataout), dataout_size );;
 	free( dataout );
   return true;
 }
-
-bool write_png(const char *filename, unsigned char *pixels, int width, int height)
-{
-  //encoder.settings.zlibsettings.windowSize = 2048;
-  //LodePNG_Text_add(&encoder.infoPng.text, "Comment", "Created with LodePNG");
-  
-  size_t dataout_size = -1;
-  unsigned char *dataout = (unsigned char *)malloc(width*height*4);
-  LodePNG_encode(&dataout, &dataout_size, pixels, width, height, LCT_RGBA, 8);
-  //LodePNG_saveFile(dataout, dataout_size, "blah2.png");
-
-  FILE *f = fopen(filename, "wb");
-  if (!f) {
-		free(dataout);
-		return false;
-	}
-
-	fwrite(dataout, 1, dataout_size, f);
-	fclose(f);
-  free(dataout);
-  return true;
-}

src/imageutils-macosx.cc

@@ -1,40 +1,34 @@
 #include <ApplicationServices/ApplicationServices.h>
 #include <CGDataConsumer.h>
-#include <iostream>
+#include "imageutils.h"
 
-CGDataConsumerCallbacks callbacks;
+CGDataConsumerCallbacks dc_callbacks;
 
 size_t write_bytes_to_ostream (void *info,const void *buffer,size_t count)
 {
-	assert( info );
+	assert( info && buffer );
 	std::ostream *output = (std::ostream *)info;
-	output->write( (const char *) buffer, count );
-	return count;
+	size_t startpos = output->tellp();
+	size_t endpos = startpos;
+	try {
+		output->write( reinterpret_cast<const char *>buffer, count );
+		endpos = output->tellp();
+	} catch (const std::ios_base::failure& e)
+    std::cerr << "Error writing to ostream:" << e.what() << "\n";
+	}
+	return endpos-startpos;
 }
 
 CGDataConsumerRef dataconsumer CGDataConsumerCreateWithOstream(std::ostream &output)
 {
-	callbacks.putBytes = write_bytes_to_ostream;
-	callbacks.releaseConsumer = NULL;
-	CGDataConsumerRef dc = CGDataConsumerCreate ( (void *)output, &callbacks );
+	dc_callbacks.putBytes = write_bytes_to_ostream;
+	dc_callbacks.releaseConsumer = NULL; // ostream closed by caller of write_png
+	CGDataConsumerRef dc = CGDataConsumerCreate ( (void *)(&output), &dc_callbacks );
 	return dc;
 }
 
-bool write_png(const char *filename, unsigned char *pixels, int width, int height)
-{
-	assert( filename );
-	std::stringstream dummy;
-	write_png_base( filename, dummy, pixels, width, height );
-}
-
 bool write_png(std::ostream &output, unsigned char *pixels, int width, int height)
 {
-	write_png_base( NULL, output, pixels, width, height );
-}
-
-bool write_png_base(const char *filename, std::ostream &output, unsigned char *pixels, int width, int height)
-{
-
   size_t rowBytes = width * 4;
 //  CGColorSpaceRef colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
 	CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
@@ -54,19 +48,18 @@ bool write_png_base(const char *filename, std::ostream &output, unsigned char *p
     return false;
   }
 
-	if ( filename == NULL ) {
-		CGDataConsumerRef dataconsumer = CGDataConsumerCreateWithOstream(output);
-	} else {
-	  CFStringRef fname = CFStringCreateWithCString(kCFAllocatorDefault, filename, kCFStringEncodingUTF8);
-	  CFURLRef fileURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
-                                                   fname, kCFURLPOSIXPathStyle, false);
-	  if (!fileURL) {
-	    std::cerr << "Unable to create file URL ref.";
-	    return false;
-	  }
+	CGDataConsumerRef dataconsumer = CGDataConsumerCreateWithOstream(output);
+	/*
+  CFStringRef fname = CFStringCreateWithCString(kCFAllocatorDefault, filename, kCFStringEncodingUTF8);
+  CFURLRef fileURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
+                                                  fname, kCFURLPOSIXPathStyle, false);
+  if (!fileURL) {
+    std::cerr << "Unable to create file URL ref.";
+    return false;
+  }
 
-		CGDataConsumerRef dataconsumer = CGDataConsumerCreateWithURL(fileURL);
-	}
+	CGDataConsumerRef dataconsumer = CGDataConsumerCreateWithURL(fileURL);
+	*/
 
   CFIndex                 fileImageIndex = 1;
   CFMutableDictionaryRef  fileDict       = NULL;

src/imageutils.cc

@@ -1,5 +1,6 @@
 #include "imageutils.h"
 #include <string.h>
+#include <fstream>
 
 void flip_image(const unsigned char *src, unsigned char *dst, size_t pixelsize, size_t width, size_t height)
 {
@@ -8,3 +9,16 @@ void flip_image(const unsigned char *src, unsigned char *dst, size_t pixelsize,
     memmove(dst + (height - i - 1) * rowBytes, src + i * rowBytes, rowBytes);
   }
 }
+
+bool write_png(const char *filename, unsigned char *pixels, int width, int height) {
+  std::ofstream fstream( filename );
+  if (fstream.is_open()) {
+    write_png( fstream, pixels, width, height );
+    fstream.close();
+    return true;
+  } else {
+    std::cerr << "Can't open file " << filename << " for export.";
+    return false;
+  }
+}
+

src/imageutils.h

@@ -2,6 +2,7 @@
 #define IMAGEUTILS_H_
 
 #include <stdlib.h>
+#include <iostream>
 
 bool write_png(const char *filename, unsigned char *pixels, int width, int height);
 bool write_png(std::ostream &output, unsigned char *pixels, int width, int height);