Module refactoring

submodules/RMIntro/Sources/platform/ios/texture_helper.m

@@ -0,0 +1,61 @@
+//
+//  texture_helper.m
+//  IntroOpenGL
+//
+//  Created by Ilya Rimchikov on 11/03/14.
+//  Copyright (c) 2014 Learn OpenGL ES. All rights reserved.
+//
+
+#include "texture_helper.h"
+
+#import <UIKit/UIKit.h>
+
+GLuint setup_texture(NSString *fileName, UIColor *color)
+{
+    CGImageRef spriteImage = [[UIImage imageNamed:fileName] CGImage];
+    if (!spriteImage) {
+        NSLog(@"Failed to load image %@", fileName);
+        return -1;
+    }
+
+    
+    // 2
+    size_t width = CGImageGetWidth(spriteImage);
+    size_t height = CGImageGetHeight(spriteImage);
+    
+    GLubyte * spriteData = (GLubyte *) calloc(width*height*4, sizeof(GLubyte));
+    
+    CGContextRef spriteContext = CGBitmapContextCreate(spriteData, width, height, 8, width*4, CGImageGetColorSpace(spriteImage), (CGBitmapInfo)kCGImageAlphaPremultipliedLast);
+    
+    // 3
+    if ([fileName isEqualToString:@"telegram_sphere.png"]) {
+        CGContextSetFillColorWithColor(spriteContext, color.CGColor);
+        CGContextFillRect(spriteContext, CGRectMake(0, 0, width, height));
+    }
+    CGContextDrawImage(spriteContext, CGRectMake(0, 0, width, height), spriteImage);
+    
+    CGContextRelease(spriteContext);
+    
+    // 4
+    GLuint texName;
+    
+    glGenTextures(1, &texName);
+    glBindTexture(GL_TEXTURE_2D, texName);
+    
+    
+    // use linear filetring
+    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+    // clamp to edge
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    
+    
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, GL_RGBA, GL_UNSIGNED_BYTE, spriteData);
+    
+    free(spriteData);
+    return texName;
+}
+
+
+