start 380 project5

changes to 380 project 4
changes to 350 project 2

Signed-off-by: Amrit Panesar <apanesar@4195tech.com>

COM380/Project5/GambleKit/Engine/Graphics/GkTexture.cpp

@@ -0,0 +1,87 @@
+//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+//	GambleKit Copyright (C) 2014 Ivan Donev
+//
+//	This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
+//
+//	This library 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 Lesser General Public License for more details.
+//
+//	You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+//	contact: gamblekit@gmail.com
+//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+
+#include "GkTexture.h"
+
+#include <GL\GLUt.h>
+
+bool GkTexture::powerOfTwo = false;
+
+GkTexture::GkTexture(void)
+{
+	glGenTextures(1, &handle);
+
+	glBindTexture(GL_TEXTURE_2D, this->handle);
+
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+}
+
+GkTexture::~GkTexture(void)
+{
+	glDeleteTextures(1, &handle);
+}
+
+void GkTexture::LoadFromImage(GkImage* image)
+{
+	this->LoadFromImage(image, 0, 0, image->width, image->height);
+}
+
+void GkTexture::LoadFromImage(GkImage* image, int x, int y, int width, int height)
+{
+	if (GkTexture::powerOfTwo)
+	{
+		this->textureWidth = GkTexture::GetPowerOfTwo(width);
+		this->textureHeight = GkTexture::GetPowerOfTwo(height);
+	}
+	else
+	{
+		this->textureWidth = width;
+		this->textureHeight = height;
+	}
+
+	this->width = width;
+	this->height = height;
+
+	void *imageData = new char[this->textureWidth * this->textureHeight * 4];
+
+	if (this->width != this->textureWidth)		
+		image->CopyPixels(imageData, x, y, width, height, 0, 0, this->textureWidth, this->textureHeight);
+	else
+		image->CopyPixels(imageData, x, y, width, height);
+	
+	glBindTexture(GL_TEXTURE_2D, this->handle);
+	//glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, this->textureWidth, this->textureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
+
+	delete imageData;
+}
+
+void GkTexture::LoadFromFile(char* fileName)
+{
+	GkImage* image = new GkImage();
+	image->LoadFromFile(fileName);
+	this->LoadFromImage(image);
+	delete image;
+}
+
+int GkTexture::GetPowerOfTwo(int value)
+{
+	int result = 1;
+	while (result < value)
+		result *= 2;
+
+	return result;
+}