GlCopyTexImage1D: Difference between revisions

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(Created page with "'''_glCopyTexImage1D:''' copy pixels into a 1D texture image {{PageSyntax}} : SUB _glCopyTexImage1D (BYVAL target AS _UNSIGNED LONG, BYVAL level AS LONG, BYVAL internalFormat AS _UNSIGNED LONG, BYVAL x AS LONG, BYVAL y AS LONG, BYVAL width AS LONG, BYVAL border AS LONG) : void '''_glCopyTexImage1D'''(GLenum {{Parameter|target}}, GLint {{Parameter|level}}, GLenum {{Parameter|internalformat}}, GLint {{Parameter|x}}, GLint {{Parameter|y}}, GLsizei {{Parameter|width}},...")
 
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'''_glCopyTexImage1D:''' copy pixels into a 1D texture image
{{DISPLAYTITLE:_glCopyTexImage1D}}
The '''_glCopyTexImage1D''' function copies pixels from the framebuffer into a one-dimensional texture image.




{{PageSyntax}}
{{PageSyntax}}
: [[SUB]] '''_glCopyTexImage1D''' ({{Parameter|target}} [[AS]] [[_UNSIGNED]] [[LONG]], {{Parameter|level}}  [[AS]] [[LONG]], {{Parameter|internalformat}} [[AS]] [[_UNSIGNED]] [[LONG]], {{Parameter|x}} [[AS]] [[LONG]], {{Parameter|y}} [[AS]] [[LONG]], {{Parameter|width}} [[AS]] [[LONG]], {{Parameter|border}} [[AS]] [[LONG]])


:  SUB _glCopyTexImage1D (BYVAL target AS _UNSIGNED LONG, BYVAL level AS LONG, BYVAL internalFormat AS _UNSIGNED LONG, BYVAL x AS LONG, BYVAL y AS LONG, BYVAL width AS LONG, BYVAL border AS LONG)


:  void '''_glCopyTexImage1D'''(GLenum {{Parameter|target}}, GLint {{Parameter|level}}, GLenum {{Parameter|internalformat}}, GLint {{Parameter|x}}, GLint {{Parameter|y}}, GLsizei {{Parameter|width}}, GLint {{Parameter|border}});
{{PageParameters}}
 
* OpenGL has many predefined attributes and values, which are used with its command parameters. These are detailed in the respective description.
 
; target
: Specifies the target texture. Must be {{KW|_GL_TEXTURE_1D}}.
; level
: Specifies the level-of-detail number. Level 0 is the base image level. Level ''n'' is the ''n''th mipmap reduction image.
; internalformat
: Specifies the internal format of the texture. Must be one of the following symbolic constants: {{KW|_GL_COMPRESSED_RED}}, {{KW|_GL_COMPRESSED_RG}}, {{KW|_GL_COMPRESSED_RGB}}, {{KW|_GL_COMPRESSED_RGBA}}. {{KW|_GL_COMPRESSED_SRGB}}, {{KW|_GL_COMPRESSED_SRGB_ALPHA}}. {{KW|_GL_DEPTH_COMPONENT}}, {{KW|_GL_DEPTH_COMPONENT16}}, {{KW|_GL_DEPTH_COMPONENT24}}, {{KW|_GL_DEPTH_COMPONENT32}}, {{KW|_GL_RED}}, {{KW|_GL_RG}}, {{KW|_GL_RGB}}, {{KW|_GL_R3_G3_B2}}, {{KW|_GL_RGB4}}, {{KW|_GL_RGB5}}, {{KW|_GL_RGB8}}, {{KW|_GL_RGB10}}, {{KW|_GL_RGB12}}, {{KW|_GL_RGB16}}, {{KW|_GL_RGBA}}, {{KW|_GL_RGBA2}}, {{KW|_GL_RGBA4}}, {{KW|_GL_RGB5_A1}}, {{KW|_GL_RGBA8}}, {{KW|_GL_RGB10_A2}}, {{KW|_GL_RGBA12}}, {{KW|_GL_RGBA16}}, {{KW|_GL_SRGB}}, {{KW|_GL_SRGB8}}, {{KW|_GL_SRGB_ALPHA}}, or {{KW|_GL_SRGB8_ALPHA8}}.
; x, y
: Specify the window coordinates of the left corner of the row of pixels to be copied.
; width
: Specifies the width of the texture image. The height of the texture image is 1.
; border
: This value must be 0.




{{PageDescription}}
{{PageDescription}}
 
* The syntax above shall just clarify the type of the command ([[SUB]] or [[FUNCTION]]) and the correct QB64 [[Variable Types]] to use for the respective parameters.
'''_glCopyTexImage1D''' defines a one-dimensional texture image with pixels from the current {{KW|_GL_READ_BUFFER}}.
* The full description can be found at [https://docs.microsoft.com/en-us/windows/win32/opengl/glcopyteximage1d Microsoft Docs] and is also valid for QB64.
 
The screen-aligned pixel row with left corner at (''x'', ''y'') and with a length of {{Parameter|width}} defines the texture array at the mipmap level specified by {{Parameter|level}}. {{Parameter|internalformat}} specifies the internal format of the texture array.
 
The pixels in the row are processed exactly as if {{KW|_glReadPixels}} had been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0, 1] and then converted to the texture's internal format for storage in the texel array.
 
Pixel ordering is such that lower ''x'' screen coordinates correspond to lower texture coordinates.
 
If any of the pixels within the specified row of the current {{KW|_GL_READ_BUFFER}} are outside the window associated with the current rendering context, then the values obtained for those pixels are undefined.
 
'''_glCopyTexImage1D''' defines a one-dimensional texture image with pixels from the current {{KW|_GL_READ_BUFFER}}.
 
When {{Parameter|internalformat}} is one of the sRGB types, the GL does not automatically convert the source pixels to the sRGB color space. In this case, the '''_glPixelMap''' function can be used to accomplish the conversion.
 
 
{{PageNotes}}
 
1, 2, 3, and 4 are not accepted values for {{Parameter|internalformat}}.
 
An image with 0 width indicates a NULL texture.
 
 
{{PageErrors}}
 
{{KW|_GL_INVALID_ENUM}} is generated if {{Parameter|target}} is not one of the allowable values.
 
{{KW|_GL_INVALID_VALUE}} is generated if {{Parameter|level}} is less than 0.
 
{{KW|_GL_INVALID_VALUE}} may be generated if {{Parameter|level}} is greater than log<sub>2</sub>(max), where max is the returned value of {{KW|_GL_MAX_TEXTURE_SIZE}}.
 
{{KW|_GL_INVALID_VALUE}} is generated if {{Parameter|internalformat}} is not an allowable value.
 
{{KW|_GL_INVALID_VALUE}} is generated if {{Parameter|width}} is less than 0 or greater than {{KW|_GL_MAX_TEXTURE_SIZE}}.
 
{{KW|_GL_INVALID_VALUE}} is generated if {{Parameter|border}} is not 0.
 
{{KW|_GL_INVALID_OPERATION}} is generated if {{Parameter|internalformat}} is {{KW|_GL_DEPTH_COMPONENT}}, {{KW|_GL_DEPTH_COMPONENT16}}, {{KW|_GL_DEPTH_COMPONENT24}}, or {{KW|_GL_DEPTH_COMPONENT32}} and there is no depth buffer.
 
 
{{PageUseWith}}
 
{{KW|_glGetTexImage}}




{{PageSeeAlso}}
{{PageSeeAlso}}
* [[_GL|SUB _GL]]


[[_GL|SUB _GL]]
{{KW|_glActiveTexture}}, {{KW|_glBindTexture}}, {{KW|_glBindFramebuffer}}, {{KW|_glCopyTexImage2D}}, {{KW|_glCopyImageSubData}}, {{KW|_glCopyTexSubImage1D}}, {{KW|_glCopyTexSubImage2D}}, {{KW|_glReadBuffer}}


{{PageNavigation}}


{{PageCopyright}}
[[Category:Final]]

Revision as of 22:23, 12 July 2022

The _glCopyTexImage1D function copies pixels from the framebuffer into a one-dimensional texture image.


Syntax

SUB _glCopyTexImage1D (target AS _UNSIGNED LONG, level AS LONG, internalformat AS _UNSIGNED LONG, x AS LONG, y AS LONG, width AS LONG, border AS LONG)


Parameters

  • OpenGL has many predefined attributes and values, which are used with its command parameters. These are detailed in the respective description.


Description

  • The syntax above shall just clarify the type of the command (SUB or FUNCTION) and the correct QB64 Variable Types to use for the respective parameters.
  • The full description can be found at Microsoft Docs and is also valid for QB64.


See also


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