Added PNG loadin support through a new Image class.

7 files changed, 252 insertions, 9 deletions

diff --git a/plugingui/Makefile.am b/plugingui/Makefile.am
index 300e594..0953a70 100644
--- a/plugingui/Makefile.am
+++ b/plugingui/Makefile.am
@@ -3,9 +3,12 @@ bin_PROGRAMS = plugingui
 include Makefile.am.plugingui
 #include $(top_srcdir)/src/Makefile.am.drumgizmo
 
-plugingui_LDADD = $(SNDFILE_LIBS) $(PTHREAD_LIBS) $(EXPAT_LIBS) -ldl -lX11
+plugingui_LDADD = $(SNDFILE_LIBS) $(PTHREAD_LIBS) $(EXPAT_LIBS) \
+	 -ldl -lX11 $(PNG_LIBS)
 
-plugingui_CXXFLAGS = $(SNDFILE_CXXFLAGS) $(PTHREAD_CFLAGS) $(EXPAT_CFLAGS) -I$(top_srcdir)/include $(PLUGIN_GUI_CFLAGS) -I$(top_srcdir)/src -DSTANDALONE -DX11 -DUSE_THREAD
+plugingui_CXXFLAGS = $(SNDFILE_CXXFLAGS) $(PTHREAD_CFLAGS) $(EXPAT_CFLAGS) \
+	-I$(top_srcdir)/include $(PLUGIN_GUI_CFLAGS) -I$(top_srcdir)/src \
+	-DSTANDALONE -DX11 -DUSE_THREAD $(PNG_CFLAGS)
 
 plugingui_CFLAGS = $(plugingui_CXXFLAGS)
 
@@ -25,6 +28,7 @@ EXTRA_DIST = \
 	font.h \
 	globalcontext.h \
 	guievent.h \
+	image.h \
 	img_back.h \
 	img_font.h \
 	img_test.h \
diff --git a/plugingui/Makefile.am.plugingui b/plugingui/Makefile.am.plugingui
index 51049c8..b3f7d8d 100644
--- a/plugingui/Makefile.am.plugingui
+++ b/plugingui/Makefile.am.plugingui
@@ -22,6 +22,7 @@ PLUGIN_GUI_SOURCES = \
 	$(top_srcdir)/plugingui/listbox.cc \
 	$(top_srcdir)/plugingui/knob.cc \
 	$(top_srcdir)/plugingui/filebrowser.cc \
+	$(top_srcdir)/plugingui/image.cc \
 	$(top_srcdir)/plugingui/combobox.cc
 
 PLUGIN_GUI_LIBS = -lX11
diff --git a/plugingui/Makefile.mingw32 b/plugingui/Makefile.mingw32
index 17e232f..6d6c003 100644
--- a/plugingui/Makefile.mingw32
+++ b/plugingui/Makefile.mingw32
@@ -2,9 +2,8 @@ top_srcdir=..
 include Makefile.am.plugingui
 
 CFLAGS=-DSTANDALONE -DWIN32 -DUSE_THREAD ${PLUGIN_GUI_CFLAGS} \
-										-I$(top_srcdir)/src
-LDFLAGS=-mconsole -lgdi32 -lsetupapi -lws2_32
-#-lgdi32
+										-I$(top_srcdir)/src -I/local/include 
+LDFLAGS=-mconsole -lgdi32 -lsetupapi -lws2_32 -L/local/lib -lpng -lz -pthread
 
 C_SOURCES = \
 	$(top_srcdir)/hugin/hugin.c \
@@ -33,6 +32,7 @@ CXX_SOURCES = \
 	$(top_srcdir)/plugingui/filebrowser.cc \
 	$(top_srcdir)/plugingui/knob.cc \
 	$(top_srcdir)/plugingui/combobox.cc \
+	$(top_srcdir)/plugingui/image.cc \
 	$(top_srcdir)/src/thread.cc \
 	$(top_srcdir)/src/semaphore.cc
 
@@ -44,13 +44,13 @@ OBJECTS=$(CXX_SOURCES:.cc=.o) $(C_SOURCES:.c=.o)
 all: $(CXX_SOURCES) $(C_SOURCES) plugingui.exe
 
 plugingui.exe: $(OBJECTS)
-	g++ $(OBJECTS) $(LDFLAGS) $(CFLAGS) -o $@
+	g++ -static -static-libgcc $(OBJECTS) $(LDFLAGS) $(CFLAGS) -o $@
 
 %.o: %.cc
-	g++ -O2 -c $(CFLAGS) $< -o $@
+	g++ -static -static-libgcc -O2 -c $(CFLAGS) $< -o $@
 
 %.o: %.c
-	gcc -O2 -c $(CFLAGS) $< -o $@
+	gcc -static -static-libgcc -O2 -c $(CFLAGS) $< -o $@
 
 clean:
-	del -rf *.o plugingui.exe
+	rm -rf $(OBJECTS) plugingui.exe
diff --git a/plugingui/image.cc b/plugingui/image.cc
new file mode 100644
index 0000000..1a0e73c
--- /dev/null
+++ b/plugingui/image.cc
@@ -0,0 +1,160 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            image.cc
+ *
+ *  Sat Mar 16 15:05:09 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "image.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+void abort_(const char * s, ...)
+{
+  va_list args;
+  va_start(args, s);
+  vfprintf(stderr, s, args);
+  fprintf(stderr, "\n");
+  va_end(args);
+  abort();
+}
+
+GUI::Image::Image(const char* data, size_t size)
+{
+}
+
+GUI::Image::Image(std::string filename)
+{
+  char header[8];    // 8 is the maximum size that can be checked
+
+  /* open file and test for it being a png */
+  FILE *fp = fopen(filename.c_str(), "rb");
+  if (!fp)
+    abort_("[read_png_file] File %s could not be opened for reading",
+           filename.c_str());
+  size_t r = fread(header, 1, 8, fp);
+  (void)r;
+  if(png_sig_cmp((const png_byte*)header, 0, 8)) {
+    abort_("[read_png_file] File %s is not recognized as a PNG file",
+           filename.c_str());
+  }
+  
+  /* initialize stuff */
+  png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+  
+  if(!png_ptr) {
+    abort_("[read_png_file] png_create_read_struct failed");
+  }
+  
+  info_ptr = png_create_info_struct(png_ptr);
+  if(!info_ptr) {
+    abort_("[read_png_file] png_create_info_struct failed");
+  }
+  
+  if(setjmp(png_jmpbuf(png_ptr))) {
+    abort_("[read_png_file] Error during init_io");
+  }
+  
+  png_init_io(png_ptr, fp);
+  png_set_sig_bytes(png_ptr, 8);
+  
+  png_read_info(png_ptr, info_ptr);
+  
+  w = png_get_image_width(png_ptr, info_ptr);
+  h = png_get_image_height(png_ptr, info_ptr);
+  color_type = png_get_color_type(png_ptr, info_ptr);
+  bit_depth = png_get_bit_depth(png_ptr, info_ptr);
+  
+  number_of_passes = png_set_interlace_handling(png_ptr);
+  png_read_update_info(png_ptr, info_ptr);
+  
+  
+  /* read file */
+  if (setjmp(png_jmpbuf(png_ptr))) {
+    abort_("[read_png_file] Error during read_image");
+  }
+  
+  row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * h);
+  size_t y;
+  for(y = 0; y < h; y++) {
+    row_pointers[y] = (png_byte*) malloc(png_get_rowbytes(png_ptr,info_ptr));
+  }
+  
+  png_read_image(png_ptr, row_pointers);
+  
+  fclose(fp);
+}
+#if 0
+void process_file(void)
+{
+  if(png_get_color_type(png_ptr, info_ptr) == PNG_COLOR_TYPE_RGB) {
+    abort_("[process_file] input file is PNG_COLOR_TYPE_RGB but must be"
+           " PNG_COLOR_TYPE_RGBA (lacks the alpha channel)");
+  }
+
+  if(png_get_color_type(png_ptr, info_ptr) != PNG_COLOR_TYPE_RGBA) {
+    abort_("[process_file] color_type of input file must be "
+           "PNG_COLOR_TYPE_RGBA (%d) (is %d)",
+           PNG_COLOR_TYPE_RGBA, png_get_color_type(png_ptr, info_ptr));
+  }
+
+  size_t x, y; 
+  for(y = 0; y < height(); y++) {
+    png_byte* row = row_pointers[y];
+    for(x = 0; x < width; x++) {
+      png_byte* ptr = &(row[x*4]);
+      printf("Pixel at position [%d - %d] has RGBA values: %d - %d - %d - %d\n",
+             x, y, ptr[0], ptr[1], ptr[2], ptr[3]);
+      
+      /* set red value to 0 and green value to the blue one */
+      ptr[0] = 0;
+      ptr[1] = ptr[2];
+    }
+  }
+}
+#endif
+
+GUI::Image::~Image()
+{
+}
+
+size_t GUI::Image::width()
+{
+  return w;
+}
+
+size_t GUI::Image::height()
+{
+  return h;
+}
+
+GUI::Colour GUI::Image::getPixel(size_t x, size_t y)
+{
+  png_byte* row = row_pointers[y];
+  png_byte* ptr = &(row[x*4]);
+  GUI::Colour c(ptr[0], ptr[1], ptr[2], ptr[3]);
+  return c;
+}
diff --git a/plugingui/image.h b/plugingui/image.h
new file mode 100644
index 0000000..c509159
--- /dev/null
+++ b/plugingui/image.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            image.h
+ *
+ *  Sat Mar 16 15:05:08 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __DRUMGIZMO_IMAGE_H__
+#define __DRUMGIZMO_IMAGE_H__
+
+#include <png.h>
+#include <string>
+
+#include "colour.h"
+
+namespace GUI {
+
+class Image {
+public:
+  Image(const char* data, size_t size);
+  Image(std::string filename);
+  ~Image();
+
+  size_t width();
+  size_t height();
+
+  Colour getPixel(size_t x, size_t y);
+
+  unsigned int *pixels;
+  unsigned int order;
+
+private:
+  size_t w, h;
+  png_byte color_type;
+  png_byte bit_depth;
+  png_structp png_ptr;
+  png_infop info_ptr;
+  int number_of_passes;
+  png_bytep * row_pointers;
+};
+
+};
+
+#endif/*__DRUMGIZMO_IMAGE_H__*/
diff --git a/plugingui/painter.cc b/plugingui/painter.cc
index ce88333..40d6112 100644
--- a/plugingui/painter.cc
+++ b/plugingui/painter.cc
@@ -383,6 +383,19 @@ void GUI::Painter::drawImage(int x0, int y0, struct __img__ * img)
   }
 }
 
+void GUI::Painter::drawImage(int x0, int y0, GUI::Image *image)
+{
+  size_t fw = image->width();
+  size_t fh = image->height();
+
+  for(size_t x = 0; x < fw; x++) {
+    for(size_t y = 0; y < fh; y++) {
+      GUI::Colour c = image->getPixel(x, y);
+      pixbuf->setPixel(x0 + x, y0 + y, c.red, c.green, c.blue, c.alpha);
+    }
+  }
+}
+
 void GUI::Painter::flush()
 {
 #ifdef X11
diff --git a/plugingui/painter.h b/plugingui/painter.h
index f236369..467e612 100644
--- a/plugingui/painter.h
+++ b/plugingui/painter.h
@@ -33,6 +33,7 @@
 #include "colour.h"
 #include "pixelbuffer.h"
 #include "font.h"
+#include "image.h"
 
 namespace GUI {
 
@@ -67,6 +68,7 @@ public:
   void drawCircle(int x, int y, double r);
   void drawFilledCircle(int x, int y, int r);
   void drawImage(int x, int y, struct __img__ * img);
+  void drawImage(int x, int y, Image *image);
 
   void clear();