OpenGL ES

The Zune HD supports the OpenGL ES 2.0 standard, which is basically OpenGL 2.0 but with a programmable render pipeline.

Getting Started

All you have to do in order to initialize OpenGL in your application is to include zdkgl.h and call ZDKGL_Initialize() on startup. Make sure to call ZDKGL_Cleanup() before exiting.
Surround your render code with ZDKGL_BeginDraw() and ZDKGL_EndDraw() and you are good to go.

Extensions

The Zune HD also supports the following extensions.
GL_OES_rgb8_rgba8, GL_OES_fbo_render_mipmap, GL_NV_depth_nonlinear, GL_NV_draw_path, GL_OES_EGL_image, GL_OES_vertex_half_float, GL_NV_framebuffer_vertex_attrib_array, GL_NV_coverage_sample, GL_OES_mapbuffer, GL_ARB_draw_buffers, GL_ARB_half_float_pixel, GL_EXT_Cg_shader, GL_EXT_packed_float, GL_OES_texture_half_float, GL_OES_texture_float, GL_EXT_texture_array, GL_OES_compressed_ETC1_RGB8_texture, GL_EXT_texture_compression_latc, GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic GL_NV_get_tex_image, GL_NV_read_buffer, GL_NV_shader_framebuffer_fetch, GL_ARB_texture_rectangle, GL_NV_fbo_color_attachments, GL_EXT_bgra

maybe supported, have to check: GL_AMD_performance_monitor, GL_EXT_multi_draw_arrays