Amrit Panesar
39ee821f54
changes to 380 project 4 changes to 350 project 2 Signed-off-by: Amrit Panesar <apanesar@4195tech.com>
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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// GambleKit Copyright (C) 2014 Ivan Donev
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//
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// 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.
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//
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// 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.
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//
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// 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
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//
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// contact: gamblekit@gmail.com
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//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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#include "GkTexture.h"
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#include <GL\GLUt.h>
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bool GkTexture::powerOfTwo = false;
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GkTexture::GkTexture(void)
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{
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glGenTextures(1, &handle);
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glBindTexture(GL_TEXTURE_2D, this->handle);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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}
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GkTexture::~GkTexture(void)
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{
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glDeleteTextures(1, &handle);
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}
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void GkTexture::LoadFromImage(GkImage* image)
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{
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this->LoadFromImage(image, 0, 0, image->width, image->height);
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}
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void GkTexture::LoadFromImage(GkImage* image, int x, int y, int width, int height)
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{
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if (GkTexture::powerOfTwo)
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{
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this->textureWidth = GkTexture::GetPowerOfTwo(width);
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this->textureHeight = GkTexture::GetPowerOfTwo(height);
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}
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else
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{
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this->textureWidth = width;
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this->textureHeight = height;
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}
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this->width = width;
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this->height = height;
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void *imageData = new char[this->textureWidth * this->textureHeight * 4];
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if (this->width != this->textureWidth)
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image->CopyPixels(imageData, x, y, width, height, 0, 0, this->textureWidth, this->textureHeight);
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else
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image->CopyPixels(imageData, x, y, width, height);
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glBindTexture(GL_TEXTURE_2D, this->handle);
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//glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, this->textureWidth, this->textureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
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delete imageData;
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}
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void GkTexture::LoadFromFile(char* fileName)
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{
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GkImage* image = new GkImage();
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image->LoadFromFile(fileName);
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this->LoadFromImage(image);
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delete image;
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}
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int GkTexture::GetPowerOfTwo(int value)
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{
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int result = 1;
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while (result < value)
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result *= 2;
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return result;
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} |