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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>fglCopyTexImage1D</STRONG> - copy pixels into a 1D texture image <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG> SUBROUTINE <STRONG>fglCopyTexImage1D</STRONG>( INTEGER*4 <EM>target</EM>, INTEGER*4 <EM>level</EM>, INTEGER*4 <EM>internalFormat</EM>, INTEGER*4 <EM>x</EM>, INTEGER*4 <EM>y</EM>, INTEGER*4 <EM>width</EM>, INTEGER*4 <EM>border</EM> ) <STRONG>PARAMETERS</STRONG> <EM>target</EM> Specifies the target texture. Must be <STRONG>GL_TEXTURE_1D</STRONG>. <EM>level</EM> Specifies the level-of-detail number. Level 0 is the base image level. Level <EM>n</EM> is the <EM>n</EM>th mipmap reduction image. <EM>internalFormat</EM> Specifies the internal format of the texture. Must be one of the following symbolic constants: <STRONG>GL_ALPHA</STRONG>, <STRONG>GL_ALPHA4</STRONG>, <STRONG>GL_ALPHA8</STRONG>, <STRONG>GL_ALPHA12</STRONG>, <STRONG>GL_ALPHA16</STRONG>, <STRONG>GL_LUMINANCE</STRONG>, <STRONG>GL_LUMINANCE4</STRONG>, <STRONG>GL_LUMINANCE8</STRONG>, <STRONG>GL_LUMINANCE12</STRONG>, <STRONG>GL_LUMINANCE16</STRONG>, <STRONG>GL_LUMINANCE_ALPHA</STRONG>, <STRONG>GL_LUMINANCE4_ALPHA4</STRONG>, <STRONG>GL_LUMINANCE6_ALPHA2</STRONG>, <STRONG>GL_LUMINANCE8_ALPHA8</STRONG>, <STRONG>GL_LUMINANCE12_ALPHA4</STRONG>, <STRONG>GL_LUMINANCE12_ALPHA12</STRONG>, <STRONG>GL_LUMINANCE16_ALPHA16</STRONG>, <STRONG>GL_INTENSITY</STRONG>, <STRONG>GL_INTENSITY4</STRONG>, <STRONG>GL_INTENSITY8</STRONG>, <STRONG>GL_INTENSITY12</STRONG>, <STRONG>GL_INTENSITY16</STRONG>, <STRONG>GL_RGB</STRONG>, <STRONG>GL_R3_G3_B2</STRONG>, <STRONG>GL_RGB4</STRONG>, <STRONG>GL_RGB5</STRONG>, <STRONG>GL_RGB8</STRONG>, <STRONG>GL_RGB10</STRONG>, <STRONG>GL_RGB12</STRONG>, <STRONG>GL_RGB16</STRONG>, <STRONG>GL_RGBA</STRONG>, <STRONG>GL_RGBA2</STRONG>, <STRONG>GL_RGBA4</STRONG>, <STRONG>GL_RGB5_A1</STRONG>, <STRONG>GL_RGBA8</STRONG>, <STRONG>GL_RGB10_A2</STRONG>, <STRONG>GL_RGBA12</STRONG>, or <STRONG>GL_RGBA16</STRONG>. <EM>x</EM>, <EM>y</EM> Specify the window coordinates of the left corner of the row of pixels to be copied. <EM>width</EM> Specifies the width of the texture image. Must be 0 or 2**n + 2*<EM>border</EM> for some integer n. The height of the texture image is 1. <EM>border</EM> Specifies the width of the border. Must be either 0 or 1. <STRONG>DESCRIPTION</STRONG> <STRONG>fglCopyTexImage1D</STRONG> defines a one-dimensional texture image with pixels from the current <STRONG>GL_READ_BUFFER</STRONG>. The screen-aligned pixel row with left corner at (x,y) and with a length of width + 2 * border defines the texture array at the mipmap level specified by <EM>level</EM>. <EM>internalFormat</EM> specifies the internal format of the texture array. The pixels in the row are processed exactly as if <STRONG>fglCopyPixels</STRONG> 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 <STRONG>GL_READ_BUFFER</STRONG> are outside the window associated with the current rendering context, then the values obtained for those pixels are undefined. <STRONG>NOTES</STRONG> <STRONG>fglCopyTexImage1D</STRONG> is available only if the GL version is 1.1 or greater. Texturing has no effect in color index mode. 1, 2, 3, and 4 are not accepted values for <EM>internalFormat</EM>. An image with 0 width indicates a NULL texture. <STRONG>ERRORS</STRONG> <STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>target</EM> is not one of the allowable values. <STRONG>GL_INVALID_VALUE</STRONG> is generated if <EM>level</EM> is less than 0. <STRONG>GL_INVALID_VALUE</STRONG> may be generated if <EM>level</EM> is greater than log max, where max is the returned value of <STRONG>GL_MAX_TEXTURE_SIZE</STRONG>. <STRONG>GL_INVALID_VALUE</STRONG> is generated if <EM>internalFormat</EM> is not an allowable value. <STRONG>GL_INVALID_VALUE</STRONG> is generated if <EM>width</EM> is less than 0 or greater than 2 + <STRONG>GL_MAX_TEXTURE_SIZE</STRONG>, or if it cannot be represented as 2**n + 2 * (border) for some integer value of <EM>n</EM>. <STRONG>GL_INVALID_VALUE</STRONG> is generated if <EM>border</EM> is not 0 or 1. <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>fglCopyTexImage1D</STRONG> is executed between the execution of <STRONG>fglBegin</STRONG> and the corresponding execution of <STRONG>fglEnd</STRONG>. <STRONG>ASSOCIATED</STRONG> <STRONG>GETS</STRONG> <STRONG>fglGetTexImage</STRONG> <STRONG>fglIsEnabled</STRONG> with argument <STRONG>GL_TEXTURE_1D</STRONG> <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>fglCopyPixels</STRONG>, <STRONG>fglCopyTexImage2D</STRONG>, <STRONG>fglCopyTexSubImage1D</STRONG>, <STRONG>fglCopyTexSubImage2D</STRONG>, <STRONG>fglPixelStore</STRONG>, <STRONG>fglPixelTransfer</STRONG>, <STRONG>fglTexEnv</STRONG>, <STRONG>fglTexGen</STRONG>, <STRONG>fglTexImage1D</STRONG>, <STRONG>fglTexImage2D</STRONG>, <STRONG>fglTexSubImage1D</STRONG>, <STRONG>fglTexSubImage2D</STRONG>, <STRONG>fglTexParameter</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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