Name NV_fbo_color_attachments Name Strings GL_NV_fbo_color_attachments Contributors Marek Zylak Contact James Helferty, NVIDIA Corporation (jhelferty 'at' nvidia.com) Status Complete. Version Last Modified Date: Feb 2, 2015 NVIDIA Revision: 4.0 Number OpenGL ES Extension #92 Dependencies The extension is written against the OpenGLES 2.0 specification. EXT_discard_framebuffer affects the definition of this extension Overview This extension increases the number of available framebuffer object color attachment points. IP Status NVIDIA Proprietary New Procedures and Functions None New Tokens Accepted by the parameter of GetIntegerv: MAX_COLOR_ATTACHMENTS_NV 0x8CDF Accepted by the parameter of FramebufferRenderbuffer, FramebufferTexture2D and GetFramebufferAttachmentParameteriv: COLOR_ATTACHMENT0_NV 0x8CE0 COLOR_ATTACHMENT1_NV 0x8CE1 COLOR_ATTACHMENT2_NV 0x8CE2 COLOR_ATTACHMENT3_NV 0x8CE3 COLOR_ATTACHMENT4_NV 0x8CE4 COLOR_ATTACHMENT5_NV 0x8CE5 COLOR_ATTACHMENT6_NV 0x8CE6 COLOR_ATTACHMENT7_NV 0x8CE7 COLOR_ATTACHMENT8_NV 0x8CE8 COLOR_ATTACHMENT9_NV 0x8CE9 COLOR_ATTACHMENT10_NV 0x8CEA COLOR_ATTACHMENT11_NV 0x8CEB COLOR_ATTACHMENT12_NV 0x8CEC COLOR_ATTACHMENT13_NV 0x8CED COLOR_ATTACHMENT14_NV 0x8CEE COLOR_ATTACHMENT15_NV 0x8CEF The COLOR_ATTACHMENT0_NV constant is equal to the COLOR_ATTACHMENT0 constant. Each COLOR_ATTACHMENTi_NV adheres to COLOR_ATTACHMENTi_NV = COLOR_ATTACHMENT0_NV + i. Changes to Chapter 4 of the OpenGL ES 2.0 Specification (Per-Fragment Operations and the Framebuffer) Replace the second paragraph of Section 4.4.1 (Binding and Managing Framebuffer Objects) with the following: The namespace for framebuffer objects is the unsigned integers, with zero reserved by OpenGL ES to refer to the default framebuffer. A framebuffer object is created by binding an unused name to the target FRAMEBUFFER. The binding is effected by calling void BindFramebuffer(enum target, uint framebuffer); with target set to FRAMEBUFFER and framebuffer set to the unused name. The resulting framebuffer object is a new state vector. There is a number of color attachment points, plus one each for the depth and stencil attachment points. The number of color attachment points is equal to the state of MAX_COLOR_ATTACHMENTS_NV. New Implementation Dependent State Add to Table 6.18 (Implementation Dependent Values) Get value Type Get Cmnd Minimum Value Description Sec. ------------------------ ---- ----------- ------------- ----------- ----- MAX_COLOR_ATTACHMENTS_NV Z+ GetIntegerv 1 Number of framebuffer 4.4.1 color attachment points Interactions with EXT_discard_framebuffer If EXT_discard_framebuffer is present, in Section 4.5 modify the arguments accepted by DiscardFramebufferEXT as follows: If a framebuffer object is bound to , may also contain tokens COLOR_ATTACHMENTm_NV where is greater than or equal to 0 and less than MAX_COLOR_ATTACHMENTS_NV. Interactions with other extensions Rendering to color attachments COLOR_ATTACHMENT[1..15]_NV can be activated through the GL_NV_draw_buffers extension. Issues None. Revision History Rev. Date Author Changes ---- -------- --------- ------------------------------------- 4 02/02/15 jhelferty Add interaction with DiscardFramebuffer. 3 05/10/10 mzylak Fixed references to core specification. 2 05/06/10 mzylak Small fixes and clarifications. 1 05/05/10 mzylak First revision.