glCopyTexImage1D(3gl)

1GLCOPYTEXIMAGE1D(3G)                                      GLCOPYTEXIMAGE1D(3G)
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NAME

6       glCopyTexImage1D - copy pixels into a 1D texture image
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C SPECIFICATION

10       void glCopyTexImage1D( GLenum target,
11                              GLint level,
12                              GLenum internalformat,
13                              GLint x,
14                              GLint y,
15                              GLsizei width,
16                              GLint border )
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PARAMETERS

20       target          Specifies the target texture.  Must be GL_TEXTURE_1D.
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22       level           Specifies  the  level-of-detail number.  Level 0 is the
23                       base image level.  Level n is the nth mipmap  reduction
24                       image.
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26       internalformat  Specifies the internal  of the texture.  Must be one of
27                       the following symbolic constants: GL_ALPHA,  GL_ALPHA4,
28                       GL_ALPHA8,    GL_ALPHA12,   GL_ALPHA16,   GL_LUMINANCE,
29                       GL_LUMINANCE4,      GL_LUMINANCE8,      GL_LUMINANCE12,
30                       GL_LUMINANCE16,                     GL_LUMINANCE_ALPHA,
31                       GL_LUMINANCE4_ALPHA4,             GL_LUMINANCE6_ALPHA2,
32                       GL_LUMINANCE8_ALPHA8,            GL_LUMINANCE12_ALPHA4,
33                       GL_LUMINANCE12_ALPHA12,         GL_LUMINANCE16_ALPHA16,
34                       GL_INTENSITY,       GL_INTENSITY4,       GL_INTENSITY8,
35                       GL_INTENSITY12,  GL_INTENSITY16,  GL_RGB,  GL_R3_G3_B2,
36                       GL_RGB4,    GL_RGB5,   GL_RGB8,   GL_RGB10,   GL_RGB12,
37                       GL_RGB16,  GL_RGBA,  GL_RGBA2,  GL_RGBA4,   GL_RGB5_A1,
38                       GL_RGBA8, GL_RGB10_A2, GL_RGBA12, or GL_RGBA16.
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40       x, y            Specify  the  window  coordinates of the left corner of
41                       the row of pixels to be copied.
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43       width           Specifies the width of the texture image.  Must be 0 or
44                       2n+2*border for some integer n.  The height of the tex‐
45                       ture image is 1.
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47       border          Specifies the width of the border.  Must be either 0 or
48                       1.
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DESCRIPTION

51       glCopyTexImage1D  defines  a  one-dimensional texture image with pixels
52       from the current GL_READ_BUFFER.
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54       The screen-aligned pixel row with left  corner  at  (x,y)  and  with  a
55       length  of width+2*border defines the texture array at the mipmap level
56       specified by level.  internalformat specifies the internal  of the tex‐
57       ture array.
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59       The pixels in the row are processed exactly as if glCopyPixels had been
60       called, but the process stops just before final  conversion.   At  this
61       point  all  pixel  component values are clamped to the range [0, 1] and
62       then converted to the texture's internal   for  storage  in  the  texel
63       array.
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65       Pixel  ordering  is  such that lower x screen coordinates correspond to
66       lower texture coordinates.
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68       If  any  of  the  pixels  within  the  specified  row  of  the  current
69       GL_READ_BUFFER  are outside the window associated with the current ren‐
70       dering context, then the values obtained for  those  pixels  are  unde‐
71       fined.
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NOTES

74       glCopyTexImage1D is available only if the GL version is 1.1 or greater.
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76       Texturing has no effect in color index mode.
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78       1, 2, 3, and 4 are not accepted values for internalformat.
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80       An image with 0 width indicates a NULL texture.
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82       When  the  GL_ARB_imaging  extension  is supported, the RGBA components
83       copied from the framebuffer may be processed by the  imaging  pipeline.
84       See glTexImage1D for specific details.
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ERRORS

87       GL_INVALID_ENUM is generated if target is not one of the allowable val‐
88       ues.
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90       GL_INVALID_VALUE is generated if level is less than 0.
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92       GL_INVALID_VALUE may be generated if level  is  greater  than  log2max,
93       where max is the returned value of GL_MAX_TEXTURE_SIZE.
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95       GL_INVALID_VALUE  is  generated  if  internalformat is not an allowable
96       value.
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98       GL_INVALID_VALUE is generated if width is less than 0 or greater than 2
99       +  GL_MAX_TEXTURE_SIZE, or if it cannot be represented as 2n+2*(border)
100       for some integer value of n.
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102       GL_INVALID_VALUE is generated if border is not 0 or 1.
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104       GL_INVALID_OPERATION  is  generated  if  glCopyTexImage1D  is  executed
105       between  the  execution  of  glBegin and the corresponding execution of
106       glEnd.
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ASSOCIATED GETS

109       glGetTexImage
110       glIsEnabled with argument GL_TEXTURE_1D
111