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glinvalidatesubframebuffer(3g) [centos man page]

GLINVALIDATESUBFRAME(3G)					   OpenGL Manual					  GLINVALIDATESUBFRAME(3G)

NAME
glInvalidateSubFramebuffer - invalidate the content of a region of some or all of a framebuffer object's attachments C SPECIFICATION
void glInvalidateSubFramebuffer(GLenum target, GLsizei numAttachments, const GLenum * attachments, GLint x, GLint y, GLint width, GLint height); PARAMETERS
target The target to which the framebuffer is attached. target must be GL_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER, or GL_READ_FRAMEBUFFER. numAttachments The number of entries in the attachments array. attachments The address of an array identifying the attachments to be invalidated. x The X offset of the region to be invalidated. y The Y offset of the region to be invalidated. width The width of the region to be invalidated. height The height of the region to be invalidated. DESCRIPTION
glInvalidateSubFramebuffer invalidates the content of a region of a specified set of attachments of a framebuffer. The framebuffer whose content to invalidate is indicated by setting target to the target to which it is bound. target may be GL_FRAMEBUFFER, GL_READ_FRAMEBUFFER or GL_DRAW_FRAMEBUFFER. GL_FRAMEBUFFER is treated as if it were GL_DRAW_FRAMEBUFFER. A region within a subset of the framebuffer's attachments may be invalidated. This set of attachments are specified in an array whose address is given by attachments and which contains numAttachments elements. The elements of attachments must be GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENTGL_DEPTH_STENCIL_ATTACHMENT, or GL_COLOR_ATTACHMENTi, where i is between zero and the value of GL_MAX_FRAMEBUFFER_ATTACHMENTS minus one. Furthermore, if the default framebuffer is bound to target, then attachments may contain GL_FRONT_LEFT, GL_FRONT_RIGHT, GL_BACK_LEFT, GL_BACK_RIGHT, GL_AUXi, GL_ACCUM, GL_COLOR, GL_DEPTH, or GL_STENCIL, identifying that specific buffer. GL_COLOR, is treated as GL_BACK_LEFT for a double-buffered context and GL_FRONT_LEFT for a single-buffered context. The region of the framebuffer attachments to be invalidated is specified by x, y, width and height where x and y give the offset from the origin (with lower-left corner at (0, 0)) and width and height give the size. Any pixels lying outside of the window allocated to the current GL context, or outside of the attachments of the currently bound framebuffer object, are ignored. After glInvalidateFramebuffer is executed, the contents of the specified region of the specified attachments become undefined. ERRORS
GL_INVALID_ENUM is generated if target is not one of the accepted framebuffer target tokens. GL_INVALID_ENUM is generated if any element of attachments is not one of the accepted framebuffer attachment tokens. GL_INVALID_OPERATION is generated if element of attachments is GL_COLOR_ATTACHMENTi where i is greater than or equal to the value of GL_MAX_COLOR_ATTACHMENTS. ASSOCIATED GETS
glGet() with argument GL_MAX_COLOR_ATTACHMENTS SEE ALSO
glInvalidateTexSubImage(), glInvalidateTexImage(), glInvalidateBufferSubData(), glInvalidateBufferData(), glInvalidateFramebuffer(). COPYRIGHT
Copyright (C) 2012 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. AUTHORS
opengl.org opengl.org 06/10/2014 GLINVALIDATESUBFRAME(3G)

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GLCHECKFRAMEBUFFERST(3G)					   OpenGL Manual					  GLCHECKFRAMEBUFFERST(3G)

NAME
glCheckFramebufferStatus - check the completeness status of a framebuffer C SPECIFICATION
GLenum glCheckFramebufferStatus(GLenum target); PARAMETERS
target Specify the target of the framebuffer completeness check. DESCRIPTION
glCheckFramebufferStatus queries the completeness status of the framebuffer object currently bound to target. target must be GL_DRAW_FRAMEBUFFER, GL_READ_FRAMEBUFFER or GL_FRAMEBUFFER. GL_FRAMEBUFFER is equivalent to GL_DRAW_FRAMEBUFFER. The return value is GL_FRAMEBUFFER_COMPLETE if the framebuffer bound to target is complete. Otherwise, the return value is determined as follows: o GL_FRAMEBUFFER_UNDEFINED is returned if target is the default framebuffer, but the default framebuffer does not exist. o GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT is returned if any of the framebuffer attachment points are framebuffer incomplete. o GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT is returned if the framebuffer does not have at least one image attached to it. o GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER is returned if the value of GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE is GL_NONE for any color attachment point(s) named by GL_DRAWBUFFERi. o GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER is returned if GL_READ_BUFFER is not GL_NONE and the value of GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE is GL_NONE for the color attachment point named by GL_READ_BUFFER. o GL_FRAMEBUFFER_UNSUPPORTED is returned if the combination of internal formats of the attached images violates an implementation-dependent set of restrictions. o GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE is returned if the value of GL_RENDERBUFFER_SAMPLES is not the same for all attached renderbuffers; if the value of GL_TEXTURE_SAMPLES is the not same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of GL_RENDERBUFFER_SAMPLES does not match the value of GL_TEXTURE_SAMPLES. o GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE is also returned if the value of GL_TEXTURE_FIXED_SAMPLE_LOCATIONS is not the same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of GL_TEXTURE_FIXED_SAMPLE_LOCATIONS is not GL_TRUE for all attached textures. o GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS is returned if any framebuffer attachment is layered, and any populated attachment is not layered, or if all populated color attachments are not from textures of the same target. Additionally, if an error occurs, zero is returned. ERRORS
GL_INVALID_ENUM is generated if target is not GL_DRAW_FRAMEBUFFER, GL_READ_FRAMEBUFFER or GL_FRAMEBUFFER. SEE ALSO
glGenFramebuffers(), glDeleteFramebuffers()glBindFramebuffer() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. AUTHORS
opengl.org opengl.org 06/10/2014 GLCHECKFRAMEBUFFERST(3G)
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