1GLCOPYTEXIMAGE2D(3G) [FIXME: manual] GLCOPYTEXIMAGE2D(3G)
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6 glCopyTexImage2D - copy pixels into a 2D texture image
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9 void glCopyTexImage2D(GLenum target, GLint level,
10 GLenum internalformat, GLint x, GLint y,
11 GLsizei width, GLsizei height, GLint border);
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14 target
15 Specifies the target texture. Must be GL_TEXTURE_2D,
16 GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
17 GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
18 GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
19 level
21 Specifies the level-of-detail number. Level 0 is the base image
22 level. Level n is the nth mipmap reduction image.
23 internalformat
25 Specifies the internal format of the texture. Must be one of the
26 following symbolic constants: GL_COMPRESSED_RED, GL_COMPRESSED_RG,
27 GL_COMPRESSED_RGB, GL_COMPRESSED_RGBA. GL_COMPRESSED_SRGB,
28 GL_COMPRESSED_SRGB_ALPHA. GL_DEPTH_COMPONENT,
29 GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT32,
30 GL_STENCIL_INDEX8, GL_RED, GL_RG, GL_RGB, GL_R3_G3_B2, GL_RGB4,
31 GL_RGB5, GL_RGB8, GL_RGB10, GL_RGB12, GL_RGB16, GL_RGBA, GL_RGBA2,
32 GL_RGBA4, GL_RGB5_A1, GL_RGBA8, GL_RGB10_A2, GL_RGBA12, GL_RGBA16,
33 GL_SRGB, GL_SRGB8, GL_SRGB_ALPHA, or GL_SRGB8_ALPHA8.
34 x, y
36 Specify the window coordinates of the lower left corner of the
37 rectangular region of pixels to be copied.
38 width
40 Specifies the width of the texture image.
41 height
43 Specifies the height of the texture image.
44 border
46 Must be 0.
47
49 glCopyTexImage2D defines a two-dimensional texture image, or cube-map
50 texture image with pixels from the current GL_READ_BUFFER.
51 The screen-aligned pixel rectangle with lower left corner at (x, y) and
53 with a width of width and a height of height defines the texture array
54 at the mipmap level specified by level. internalformat specifies the
55 internal format of the texture array.
56 The pixels in the rectangle are processed exactly as if glReadPixels()
58 had been called, but the process stops just before final conversion. At
59 this point all pixel component values are clamped to the range 0 1 and
60 then converted to the texture's internal format for storage in the
61 texel array.
62 Pixel ordering is such that lower x and y screen coordinates correspond
64 to lower s and t texture coordinates.
65 If any of the pixels within the specified rectangle of the current
67 GL_READ_BUFFER are outside the window associated with the current
68 rendering context, then the values obtained for those pixels are
69 undefined.
70 When internalformat is one of the sRGB types, the GL does not
72 automatically convert the source pixels to the sRGB color space. In
73 this case, the glPixelMap function can be used to accomplish the
74 conversion.
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77 1, 2, 3, and 4 are not accepted values for internalformat.
78 An image with height or width of 0 indicates a NULL texture.
80 GL_STENCIL_INDEX8 is accepted for internalformat only if the GL version
82 is 4.4 or higher.
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85 GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D,
86 GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
87 GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
88 GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
89 GL_INVALID_VALUE is generated if level is less than 0.
91 GL_INVALID_VALUE may be generated if level is greater than log 2 max,
93 where max is the returned value of GL_MAX_TEXTURE_SIZE.
94 GL_INVALID_VALUE is generated if width is less than 0 or greater than
96 GL_MAX_TEXTURE_SIZE.
97 GL_INVALID_VALUE is generated if border is not 0.
99 GL_INVALID_VALUE is generated if internalformat is not an accepted
101 format.
102 GL_INVALID_OPERATION is generated if internalformat is
104 GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, or
105 GL_DEPTH_COMPONENT32 and there is no depth buffer.
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108 glGetTexImage()
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111 ┌─────────────────┬───────────────────────────────────────────────────────────────────────┐
112 │ │ OpenGL Version │
113 ├─────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
114 │Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
115 │/ │ │ │ │ │ │ │ │ │ │ │ │ │
116 │Feature │ │ │ │ │ │ │ │ │ │ │ │ │
117 │Name │ │ │ │ │ │ │ │ │ │ │ │ │
118 ├─────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
119 │glCopyTexImage2D │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
120 └─────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
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123 glCopyTexImage1D(), glCopyTexSubImage1D(), glCopyTexSubImage2D(),
124 glPixelStore(), glTexImage1D(), glTexImage2D(), glTexSubImage1D(),
125 glTexSubImage2D(), glTexParameter()
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128 Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2012-2014
129 Khronos Group. This document is licensed under the SGI Free Software B
130 License. For details, see http://oss.sgi.com/projects/FreeB/.
131
133 Copyright © 2013-2014 Khronos Group
134[FIXME: source] 07/13/2018 GLCOPYTEXIMAGE2D(3G)