1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/prototype/src/colgrade.cc	Fri Oct 19 02:45:57 2012 +0300
     1.3 @@ -0,0 +1,74 @@
     1.4 +#include <stdio.h>
     1.5 +#include "opengl.h"
     1.6 +#include "colgrade.h"
     1.7 +
     1.8 +GradePalette::GradePalette()
     1.9 +{
    1.10 +	tex = 0;
    1.11 +}
    1.12 +
    1.13 +GradePalette::~GradePalette()
    1.14 +{
    1.15 +	destroy();
    1.16 +}
    1.17 +
    1.18 +bool GradePalette::create(int sz)
    1.19 +{
    1.20 +	unsigned int clamp = GLEW_ARB_texture_border_clamp ? GL_CLAMP_TO_EDGE : GL_CLAMP;
    1.21 +
    1.22 +	destroy();
    1.23 +
    1.24 +	glGenTextures(1, &tex);
    1.25 +	glBindTexture(GL_TEXTURE_3D, tex);
    1.26 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    1.27 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    1.28 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, clamp);
    1.29 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, clamp);
    1.30 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, clamp);
    1.31 +	glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, sz, sz, sz, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
    1.32 +
    1.33 +	unsigned char *scanline = new unsigned char[sz * 3];
    1.34 +
    1.35 +	size = sz;
    1.36 +	for(int i=0; i<sz; i++) {	// for each slice...
    1.37 +		int b = 255 * i / (sz - 1);
    1.38 +		for(int j=0; j<sz; j++) {	// for each scanline...
    1.39 +			int g = 255 * j / (sz - 1);
    1.40 +
    1.41 +			for(int k=0; k<sz; k++) {
    1.42 +				int r = 255 * k / (sz - 1);
    1.43 +
    1.44 +				scanline[k * 3] = r;
    1.45 +				scanline[k * 3 + 1] = g;
    1.46 +				scanline[k * 3 + 2] = b;
    1.47 +			}
    1.48 +			glTexSubImage3D(GL_TEXTURE_3D, 0, 0, j, i, sz, 1, 1, GL_RGB,
    1.49 +					GL_UNSIGNED_BYTE, scanline);
    1.50 +		}
    1.51 +	}
    1.52 +
    1.53 +	delete [] scanline;
    1.54 +	return true;
    1.55 +}
    1.56 +
    1.57 +void GradePalette::destroy()
    1.58 +{
    1.59 +	if(tex) {
    1.60 +		glDeleteTextures(1, &tex);
    1.61 +	}
    1.62 +}
    1.63 +
    1.64 +bool GradePalette::save_shot(const char *fname) const
    1.65 +{
    1.66 +	return false;	// TODO
    1.67 +}
    1.68 +
    1.69 +bool GradePalette::load_shot(const char *fname)
    1.70 +{
    1.71 +	return false;	// TODO
    1.72 +}
    1.73 +
    1.74 +unsigned int GradePalette::get_texture() const
    1.75 +{
    1.76 +	return tex;
    1.77 +}