OpenGL extensions used in Kanzi

This table lists the OpenGL extensions that Kanzi uses.

Feature: OpenGL extensions	Requirement
Linear color workflow: GL_EXT_sRGB	Kanzi enables this extension, if it is available.
Binary shaders: GL_ARB_get_program_binary GL_OES_get_program_binary	If you use binary shaders, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher. See Using binary shaders.
Debugging: GL_KHR_debug	If you call Renderer::logOpenGLInformation and this extension is available, Kanzi uses it.
Multisampling (MSAA): GL_NV_framebuffer_multisample GL_ARB_framebuffer_object GL_EXT_multisampled_render_to_texture GL_IMG_multisampled_render_to_texture	If you set in a Composition Target Render Pass the Multisample Level property, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher. See Rendering content to composition targets and Using multisampling.
Vertex formats: GL_ARB_half_float_vertex GL_OES_vertex_half_float	If you use half-float vertex formats, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher. See Optimizing meshes.
Texture and render target formats: GL_OES_rgb8_rgba8 extension	If you use RGB8 render targets, Kanzi uses this extension, if it is available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_ARB_half_float_pixel GL_EXT_color_buffer_half_float GL_EXT_color_buffer_float GL_ARB_color_buffer_float	If in a texture or render target you select any float16 or float32 format, Kanzi uses these extensions, if they are available.
Texture and render target formats: GL_EXT_texture_norm16	If in a texture or render target you select any 16-bit signed or unsigned format, Kanzi uses this extension, if it is available.
Texture and render target formats: GL_ARB_texture_storage_multisample GL_ARB_texture_storage GL_EXT_texture_storage	Kanzi uses these extensions, if they are available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_ETC1_RGB8_OES	If you use ETC1 texture formats, the corresponding format out of these must be available. See Using the ETC algorithm.
Texture and render target formats: GL_COMPRESSED_RGB8_ETC2 GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 GL_COMPRESSED_RGBA8_ETC2_EAC	If you use ETC2 texture formats, the corresponding format out of these must be available. See Using the ETC algorithm.
Texture and render target formats: GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG GL_COMPRESSED_RGBA_PVRTC_2BPPV2_IMG GL_COMPRESSED_RGBA_PVRTC_4BPPV2_IMG	If you use PVRTC texture formats, the corresponding format out of these must be available. See Using the PVRTC algorithm.
Texture and render target formats: GL_ATC_RGB_AMD GL_ATC_RGBA_EXPLICIT_ALPHA_AMD GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD	If you use ATC texture formats, the corresponding format out of these must be available. See Using the ATC algorithm.
Texture and render target formats: GL_COMPRESSED_RGBA_ASTC_4x4 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4 GL_COMPRESSED_RGBA_ASTC_5x4 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4 GL_COMPRESSED_RGBA_ASTC_5x5 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5 GL_COMPRESSED_RGBA_ASTC_6x5 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5 GL_COMPRESSED_RGBA_ASTC_6x6 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6 GL_COMPRESSED_RGBA_ASTC_8x5 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5 GL_COMPRESSED_RGBA_ASTC_8x6 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6 GL_COMPRESSED_RGBA_ASTC_8x8 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8 GL_COMPRESSED_RGBA_ASTC_10x5 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5 GL_COMPRESSED_RGBA_ASTC_10x6 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6 GL_COMPRESSED_RGBA_ASTC_10x8 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8 GL_COMPRESSED_RGBA_ASTC_10x10 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10 GL_COMPRESSED_RGBA_ASTC_12x10 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10 GL_COMPRESSED_RGBA_ASTC_12x12 GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12	If you use ASTC texture formats, the corresponding format out of these must be available. See Using the ASTC algorithm.
Texture and render target formats: GL_ARB_depth_texture GL_OES_depth_texture	If you use 16-bit depth texture format, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_OES_depth24 GL_ARB_depth_texture	If you use 24-bit depth texture formats, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_OES_depth32 GL_ARB_depth_texture	If you use 32-bit depth texture formats, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_EXT_packed_depth_stencil GL_OES_packed_depth_stencil	If you use depth and stencil, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_OES_stencil8	If you use stencil8 texture formats, this extension must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_EXT_texture_filter_anisotropic	If you set anisotropic filtering in any of your textures, this extension must be available.
Texture and render target formats: GL_ARB_seamless_cube_map	Kanzi enables this extension, if it is available.
Texture and render target formats: GL_EXT_texture_rg	If you use RG textures, this extension must be available, unless your platform supports OpenGL ES 3.0 or higher.
Texture and render target formats: GL_EXT_draw_buffers	If you use a Composition Target Render Pass to render content to multiple targets, this extension must be available, unless your platform supports OpenGL ES 3.0 or higher. See Rendering content to multiple composition targets.
Mesh instancing GL_ARB_draw_instanced GL_EXT_draw_instanced	If you instantiate meshes, one of these extensions must be available, unless your platform supports OpenGL ES 3.0 or higher.
Geometry shaders GL_ARB_geometry_shader GL_OES_geometry_shader	If you use geometry shaders, one of these extensions must be available, unless your platform supports OpenGL ES 3.2 or higher. See Using geometry shaders.
Tessellation shaders GL_ARB_tessellation_shader GL_OES_tessellation_shader	If you use tessellation shaders, one of these extensions must be available, unless your platform supports OpenGL ES 3.2 or higher. See Using tessellation shaders.
Advanced color blending: GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent	If you set any node or material to use an advanced color blending mode, these extensions must be available. See Advanced color blending modes.

See also

Using binary shaders

Rendering content to composition targets

Applying anti-aliasing

Optimizing meshes

Compressing textures

Textures

Using render target textures

Composition and blending