invisible: src/texture.cc annotate

invisible

'w' to switch to wireframe

author	Eleni Maria Stea <eleni@mutantstargoat.com>
date	Sun, 17 Nov 2013 12:46:45 +0200
parents	f756fc9fdd3e
children

rev	line source
eleni@19	1 #include <GL/gl.h>
eleni@19	2 #include <highgui.h>
eleni@19	3 #include <cv.h>
eleni@19	4 #include "texture.h"
eleni@19	5
eleni@23	6 unsigned int load_texture(const char* fname, int xsz, int ysz)
eleni@19	7 {
eleni@19	8 IplImage* img = cvLoadImage(fname);
eleni@19	9 if(!img) {
eleni@19	10 fprintf(stderr, "Failed to load image: %s\n", fname);
eleni@19	11 return 0;
eleni@19	12 }
eleni@19	13 cv::Mat mat = cv::Mat(img);
eleni@19	14
eleni@19	15 unsigned int tex;
eleni@19	16 glGenTextures(1, &tex);
eleni@19	17 glBindTexture(GL_TEXTURE_2D, tex);
eleni@19	18 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
eleni@19	19 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
eleni@19	20 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
eleni@19	21 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
eleni@19	22 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, mat.cols, mat.rows,
eleni@19	23 0, GL_BGR, GL_UNSIGNED_BYTE, mat.data);
eleni@19	24
eleni@23	25 if(xsz) {
eleni@23	26 *xsz = mat.cols;
eleni@23	27 }
eleni@23	28 if(ysz) {
eleni@23	29 *ysz = mat.rows;
eleni@23	30 }
eleni@19	31 return tex;
eleni@19	32 }