Framebuffer Objects - Praise for OpenGL ES 30 Programming Guide - page 352

Example 12-3 Render to Depth Texture (continued)

glBindTexture ( GL_TEXTURE_2D, textures[COLOR_TEXTURE] );
glTexImage2D ( GL_TEXTURE_2D, 0, GL_RGB, texWidth, texHeight, 0,
GL_RGB, GL_UNSIGNED_SHORT_5_6_5, NULL );

glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_LINEAR );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR );

// bind depth texture and load the texture mip level 0
// no texels need to specified as we are going to draw into
// the texture
glBindTexture ( GL_TEXTURE_2D, textures[DEPTH_TEXTURE] );
glTexImage2D ( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, texWidth,
texHeight, 0, GL_DEPTH_COMPONENT,
GL_UNSIGNED_SHORT, NULL );

glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST );

// bind the framebuffer
glBindFramebuffer ( GL_FRAMEBUFFER, framebuffer );

// specify texture as color attachment
glFramebufferTexture2D ( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, textures[COLOR_TEXTURE],
0 );

// specify texture as depth attachment
glFramebufferTexture2D ( GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_TEXTURE_2D, textures[DEPTH_TEXTURE],
0 );

// check for framebuffer complete
status = glCheckFramebufferStatus ( GL_FRAMEBUFFER );
if ( status == GL_FRAMEBUFFER_COMPLETE )
{
// render to color and depth textures using FBO
// clear color and depth buffers