istereo2

annotate src/tex.c @ 24:9d53a4938ce8

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port to android mostly complete, ads not done, and needs some polishing
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 04 Oct 2015 08:15:24 +0300
parents 81d35769f546
children
rev   line source
nuclear@2 1 /*
nuclear@2 2 Stereoscopic tunnel for iOS.
nuclear@24 3 Copyright (C) 2011-2015 John Tsiombikas <nuclear@member.fsf.org>
nuclear@2 4
nuclear@2 5 This program is free software: you can redistribute it and/or modify
nuclear@2 6 it under the terms of the GNU General Public License as published by
nuclear@2 7 the Free Software Foundation, either version 3 of the License, or
nuclear@2 8 (at your option) any later version.
nuclear@2 9
nuclear@2 10 This program is distributed in the hope that it will be useful,
nuclear@2 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@2 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@2 13 GNU General Public License for more details.
nuclear@2 14
nuclear@2 15 You should have received a copy of the GNU General Public License
nuclear@2 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@2 17 */
nuclear@2 18
nuclear@2 19 #include <stdio.h>
nuclear@2 20 #include <stdlib.h>
nuclear@2 21 #include <string.h>
nuclear@2 22 #include <errno.h>
nuclear@2 23 #include "opengl.h"
nuclear@2 24 #include "tex.h"
nuclear@2 25 #include "config.h"
nuclear@2 26 #include "imago2.h"
nuclear@24 27 #include "assman.h"
nuclear@24 28
nuclear@24 29 static size_t ioread(void *buf, size_t bytes, void *uptr);
nuclear@24 30 static long ioseek(long offs, int whence, void *uptr);
nuclear@2 31
nuclear@2 32 unsigned int load_texture(const char *fname)
nuclear@2 33 {
nuclear@2 34 unsigned int tex;
nuclear@24 35 ass_file *fp;
nuclear@24 36 struct img_io io;
nuclear@24 37 struct img_pixmap img;
nuclear@2 38
nuclear@2 39 if(!fname) {
nuclear@2 40 return 0;
nuclear@2 41 }
nuclear@24 42 if(!(fp = ass_fopen(fname, "rb"))) {
nuclear@24 43 fprintf(stderr, "failed to open texture file: %s: %s\n", fname, strerror(errno));
nuclear@2 44 return 0;
nuclear@2 45 }
nuclear@24 46 io.uptr = fp;
nuclear@24 47 io.read = ioread;
nuclear@24 48 io.write = 0;
nuclear@24 49 io.seek = ioseek;
nuclear@24 50
nuclear@24 51 img_init(&img);
nuclear@24 52 if(img_read(&img, &io) == -1) {
nuclear@24 53 fprintf(stderr, "failed to load image: %s\n", fname);
nuclear@24 54 ass_fclose(fp);
nuclear@24 55 return 0;
nuclear@24 56 }
nuclear@24 57 ass_fclose(fp);
nuclear@24 58 img_convert(&img, IMG_FMT_RGBA32);
nuclear@2 59
nuclear@2 60 glGenTextures(1, &tex);
nuclear@2 61 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@2 62 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
nuclear@2 63 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
nuclear@24 64 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
nuclear@2 65 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@24 66
nuclear@24 67 #ifdef __GLEW_H__
nuclear@24 68 if(GLEW_SGIS_generate_mipmap) {
nuclear@24 69 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
nuclear@24 70 #endif
nuclear@24 71 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img.width, img.height, 0,
nuclear@24 72 GL_RGBA, GL_UNSIGNED_BYTE, img.pixels);
nuclear@24 73 #ifdef __GLEW_H__
nuclear@24 74 } else {
nuclear@24 75 gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, img.width, img.height,
nuclear@24 76 GL_RGBA, GL_UNSIGNED_BYTE, img.pixels);
nuclear@24 77 }
nuclear@24 78 #endif
nuclear@24 79
nuclear@24 80 #ifdef GL_ES_VERSION_2_0
nuclear@24 81 glGenerateMipmap(GL_TEXTURE_2D);
nuclear@24 82 #endif
nuclear@24 83 img_destroy(&img);
nuclear@2 84
nuclear@2 85 return tex;
nuclear@2 86 }
nuclear@2 87
nuclear@2 88 void bind_texture(unsigned int tex, int unit)
nuclear@2 89 {
nuclear@2 90 glActiveTexture(GL_TEXTURE0 + unit);
nuclear@2 91
nuclear@24 92 #ifndef GL_ES_VERSION_2_0
nuclear@2 93 if(tex) {
nuclear@2 94 glEnable(GL_TEXTURE_2D);
nuclear@2 95 } else {
nuclear@2 96 glDisable(GL_TEXTURE_2D);
nuclear@2 97 }
nuclear@2 98 #endif
nuclear@2 99
nuclear@2 100 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@2 101 }
nuclear@24 102
nuclear@24 103 static size_t ioread(void *buf, size_t bytes, void *uptr)
nuclear@24 104 {
nuclear@24 105 return ass_fread(buf, 1, bytes, uptr);
nuclear@24 106 }
nuclear@24 107
nuclear@24 108 static long ioseek(long offs, int whence, void *uptr)
nuclear@24 109 {
nuclear@24 110 return ass_fseek(uptr, offs, whence);
nuclear@24 111 }