nuclear@12: /*
nuclear@12: eqemu - electronic queue system emulator
nuclear@12: Copyright (C) 2014  John Tsiombikas <nuclear@member.fsf.org>,
nuclear@12:                     Eleni-Maria Stea <eleni@mutantstargoat.com>
nuclear@12: 
nuclear@12: This program is free software: you can redistribute it and/or modify
nuclear@12: it under the terms of the GNU General Public License as published by
nuclear@12: the Free Software Foundation, either version 3 of the License, or
nuclear@12: (at your option) any later version.
nuclear@12: 
nuclear@12: This program is distributed in the hope that it will be useful,
nuclear@12: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@12: GNU General Public License for more details.
nuclear@12: 
nuclear@12: You should have received a copy of the GNU General Public License
nuclear@12: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@12: */
nuclear@5: #include <string.h>
nuclear@3: #include <GL/glew.h>
nuclear@5: #include <imago2.h>
nuclear@3: #include "material.h"
nuclear@3: 
nuclear@5: static const char *find_path(const char *fname);
nuclear@5: 
nuclear@3: Material::Material()
nuclear@4: 	: diffuse(1, 1, 1), specular(0, 0, 0)
nuclear@3: {
nuclear@3: 	shininess = 1.0;
nuclear@3: 	alpha = 1.0;
nuclear@5: 
nuclear@5: 	for(int i=0; i<NUM_TEXTURES; i++) {
nuclear@5: 		tex[i] = 0;
nuclear@5: 		tex_scale[i].x = tex_scale[i].y = 1.0f;
nuclear@5: 	}
nuclear@5: 	sdr = 0;
nuclear@3: }
nuclear@3: 
nuclear@3: void Material::setup() const
nuclear@3: {
nuclear@6: 	float amb[] = {ambient.x, ambient.y, ambient.z, 1.0};
nuclear@6: 	glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
nuclear@6: 
nuclear@4: 	float col[] = {diffuse.x, diffuse.y, diffuse.z, alpha};
nuclear@6: 	glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col);
nuclear@3: 
nuclear@3: 	float spec[] = {specular.x, specular.y, specular.z, 1.0};
nuclear@3: 	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, spec);
nuclear@3: 
nuclear@3: 	glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess > 128 ? 128 : shininess);
nuclear@5: 
nuclear@6: 	float emit[] = {emissive.x, emissive.y, emissive.z, 1.0};
nuclear@6: 	glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, emit);
nuclear@5: 
nuclear@6: 	int num_tex = 0;
nuclear@5: 	if(tex[TEX_DIFFUSE]) {
nuclear@6: 		glActiveTexture(GL_TEXTURE0 + num_tex++);
nuclear@5: 
nuclear@5: 		glMatrixMode(GL_TEXTURE);
nuclear@5: 		glLoadIdentity();
nuclear@5: 		glTranslatef(tex_offset[TEX_DIFFUSE].x, tex_offset[TEX_DIFFUSE].y, 0);
nuclear@5: 		glScalef(tex_scale[TEX_DIFFUSE].x, tex_scale[TEX_DIFFUSE].y, 1);
nuclear@5: 
nuclear@5: 		glBindTexture(GL_TEXTURE_2D, tex[TEX_DIFFUSE]);
nuclear@5: 		glEnable(GL_TEXTURE_2D);
nuclear@5: 
nuclear@6: 		glDisable(GL_TEXTURE_GEN_S);
nuclear@6: 		glDisable(GL_TEXTURE_GEN_T);
nuclear@6: 
nuclear@6: 		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
nuclear@5: 	}
nuclear@6: 
nuclear@5: 	if(tex[TEX_ENVMAP]) {
nuclear@6: 		glActiveTexture(GL_TEXTURE0 + num_tex++);
nuclear@5: 
nuclear@5: 		glMatrixMode(GL_TEXTURE);
nuclear@5: 		glLoadIdentity();
nuclear@5: 		glTranslatef(tex_offset[TEX_ENVMAP].x, tex_offset[TEX_ENVMAP].y, 0);
nuclear@5: 		glScalef(tex_scale[TEX_ENVMAP].x, tex_scale[TEX_ENVMAP].y, 1);
nuclear@5: 
nuclear@5: 		glBindTexture(GL_TEXTURE_2D, tex[TEX_ENVMAP]);
nuclear@5: 		glEnable(GL_TEXTURE_2D);
nuclear@5: 
nuclear@5: 		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
nuclear@5: 		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
nuclear@5: 		glEnable(GL_TEXTURE_GEN_S);
nuclear@5: 		glEnable(GL_TEXTURE_GEN_T);
nuclear@5: 
nuclear@6: 		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
nuclear@6: 	}
nuclear@6: 
nuclear@6: 
nuclear@7: 	glMatrixMode(GL_TEXTURE);
nuclear@6: 	for(int i=num_tex; i<4; i++) {
nuclear@6: 		glActiveTexture(GL_TEXTURE0 + i);
nuclear@6: 		glDisable(GL_TEXTURE_2D);
nuclear@7: 		glLoadIdentity();
nuclear@5: 	}
nuclear@5: 
nuclear@5: 	glActiveTexture(GL_TEXTURE0);
nuclear@5: 	glMatrixMode(GL_MODELVIEW);
nuclear@3: }
nuclear@5: 
nuclear@5: unsigned int load_texture(const char *fname)
nuclear@5: {
nuclear@5: 	int xsz, ysz;
nuclear@5: 	void *pixels;
nuclear@5: 	unsigned int tex;
nuclear@5: 
nuclear@5: 	const char *path = find_path(fname);
nuclear@5: 
nuclear@5: 	if(!(pixels = img_load_pixels(path, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@5: 		fprintf(stderr, "failed to load texture: %s\n", fname);
nuclear@5: 		return 0;
nuclear@5: 	}
nuclear@5: 
nuclear@5: 	glGenTextures(1, &tex);
nuclear@5: 	glBindTexture(GL_TEXTURE_2D, tex);
nuclear@5: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@5: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@5: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
nuclear@5: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
nuclear@5: 	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@5: 	img_free_pixels(pixels);
nuclear@5: 	return tex;
nuclear@5: }
nuclear@5: 
nuclear@5: static const char *find_path(const char *fname)
nuclear@5: {
nuclear@5: 	const char *ptr = fname + strlen(fname) - 1;
nuclear@5: 
nuclear@5: 	do {
nuclear@5: 		while(*ptr != '/' && ptr > fname - 1) {
nuclear@5: 			ptr--;
nuclear@5: 		}
nuclear@5: 
nuclear@5: 		FILE *fp = fopen(ptr + 1, "rb");
nuclear@5: 		if(fp) {
nuclear@5: 			fclose(fp);
nuclear@5: 			return ptr + 1;
nuclear@5: 		}
nuclear@5: 		ptr -= 1;
nuclear@5: 
nuclear@5: 	} while(ptr >= fname);
nuclear@5: 
nuclear@5: 	return fname;
nuclear@5: }