Initial load of ilcontainer

Author: pkivolowitz

ilcontainer.cpp

@@ -0,0 +1,94 @@
+#include <assert.h>
+#include "ilcontainer.h"
+
+bool ILContainer::Initialize(const char * file_name)
+{
+	// We are asserting that we have not initialized this object before.
+	assert(this->il_handle == BAD_IL_VALUE);
+
+	if ((this->il_handle = ilGenImage()) == BAD_IL_VALUE)
+		return false;
+	ilBindImage(this->il_handle);
+	if (!ilLoadImage(file_name))
+		return false;
+
+	glGenTextures(1, &this->il_texture_handle);
+	glBindTexture(GL_TEXTURE_2D, this->il_texture_handle);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), this->width = ilGetInteger(IL_IMAGE_WIDTH), this->height = ilGetInteger(IL_IMAGE_HEIGHT), 0, this->format = ilGetInteger(IL_IMAGE_FORMAT), GL_UNSIGNED_BYTE, this->data = ilGetData());
+	return true;
+}
+
+/*	To use with a shader, the sampler uniform must be fed the
+	same paramter value as you call this function with.
+*/
+
+void ILContainer::Bind(GLuint texture_unit)
+{
+	// We are asserting that we have initialized this object before.
+	assert(this->il_handle != BAD_IL_VALUE);
+
+	glActiveTexture(GL_TEXTURE0 + texture_unit);
+	glBindTexture(GL_TEXTURE_2D, this->il_texture_handle);
+}
+
+/*	This class assumes that the object will be dynamically created.
+	This  assumption is  demonstrated in the destructor which calls
+	OpenGL. If an object  is  declared  in  the  global  score, the 
+	destructor will run  after  the  OpenGL  context is  destroyed, 
+	which would be an error.
+*/
+
+ILContainer::~ILContainer()
+{
+	if (this->il_texture_handle != BAD_GL_VALUE)
+		glDeleteTextures(1, &this->il_texture_handle);
+	if (this->il_handle != BAD_IL_VALUE)
+		ilDeleteImage(this->il_handle);
+
+	this->il_handle = BAD_IL_VALUE;
+	this->il_texture_handle = BAD_GL_VALUE;
+}
+
+/* Do not use
+
+bool ILCubemapContainer::Initialize(const char * file_name, int width, int height, int offsetx, int offsety)
+{
+	assert(this->il_handle == BAD_IL_VALUE);
+	if ((this->il_handle = ilGenImage()) == BAD_IL_VALUE)
+		return false;
+	ilBindImage(this->il_handle);
+	if (!ilLoadImage(file_name))
+		return false;
+
+	glGenTextures(7, this->il_texture_handle);
+	glBindTexture(GL_TEXTURE_2D, this->il_texture_handle[0]);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), this->width = ilGetInteger(IL_IMAGE_WIDTH), this->height = ilGetInteger(IL_IMAGE_HEIGHT), 0, ilGetInteger(IL_IMAGE_FORMAT), GL_UNSIGNED_BYTE, ilGetData());
+	return true;
+}
+
+void ILCubemapContainer::Bind(GLuint texture_unit)
+{
+	glActiveTexture(GL_TEXTURE0 + texture_unit);
+//	glBindTexture(GL_TEXTURE_2D, this->il_texture_handle);
+}
+
+ILCubemapContainer::~ILCubemapContainer()
+{
+	if (this->il_texture_handle[0] != BAD_GL_VALUE)
+		glDeleteTextures(7, this->il_texture_handle);
+	if (this->il_handle != BAD_IL_VALUE)
+		ilDeleteImage(this->il_handle);
+
+	this->il_handle = BAD_IL_VALUE;
+	this->il_texture_handle[0] = BAD_GL_VALUE;
+}
+
+*/

ilcontainer.h

@@ -0,0 +1,67 @@
+/* Perry Kivolowitz */
+
+#pragma once
+#undef	_UNICODE
+#include <GL/glew.h>
+#include <GL/freeglut.h>
+#include <IL/il.h>
+#include <IL/ilu.h>
+#include <IL/ilut.h>
+
+#define	BAD_IL_VALUE	IL_INVALID_VALUE
+#ifndef BAD_GL_VALUE
+#define	BAD_GL_VALUE	GLuint(-1)
+#endif // !BAD_GL_VALUE
+
+/*	This class assumes that the object will be dynamically created.
+	This  assumption is  demonstrated in the destructor which calls
+	OpenGL. If an object  is  declared  in  the  global  score, the 
+	destructor will run  after  the  OpenGL  context is  destroyed, 
+	which would be an error.
+*/
+
+class ILContainer
+{
+public:
+	ILContainer()
+	{
+		this->il_handle = BAD_IL_VALUE;
+		this->il_texture_handle = BAD_GL_VALUE;
+	}
+
+	~ILContainer();
+	
+	bool Initialize(const char * file_name);
+	void Bind(GLuint texture_unit = 0);
+
+	ILint width;
+	ILint height;
+	ILint format;
+	ILuint il_handle;
+	GLuint il_texture_handle;
+	GLvoid * data;
+};
+
+/* Do not use
+
+class ILCubemapContainer
+{
+public:
+	ILCubemapContainer()
+	{
+		this->il_handle = BAD_IL_VALUE;
+		this->il_texture_handle[0] = BAD_GL_VALUE;
+	}
+
+	~ILCubemapContainer();
+	
+	bool Initialize(const char * file_name, int width, int height, int offsetx, int offsety);
+	void Bind(GLuint texture_unit = 0);
+
+	ILint width;
+	ILint height;
+	ILuint il_handle;
+	GLuint il_texture_handle[7];
+};
+
+*/