glTexSubImage2D, glTextureSubImage2D — specify a two-dimensional texture subimage
void glTexSubImage2D(
|
GLenum target, |
| GLint level, | |
| GLint xoffset, | |
| GLint yoffset, | |
| GLsizei width, | |
| GLsizei height, | |
| GLenum format, | |
| GLenum type, | |
const GLvoid * pixels); |
void glTextureSubImage2D(
|
GLuint texture, |
| GLint level, | |
| GLint xoffset, | |
| GLint yoffset, | |
| GLsizei width, | |
| GLsizei height, | |
| GLenum format, | |
| GLenum type, | |
const void *pixels); |
target
Specifies the target to which the texture is bound
for glTexSubImage2D.
Must be GL_TEXTURE_2D,
GL_TEXTURE_CUBE_MAP_POSITIVE_X,
GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
or GL_TEXTURE_1D_ARRAY.
texture
Specifies the texture object name for
glTextureSubImage2D. The effective
target of texture must be one of
the valid target values above.
level
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
xoffset
Specifies a texel offset in the x direction within the texture array.
yoffset
Specifies a texel offset in the y direction within the texture array.
width
Specifies the width of the texture subimage.
height
Specifies the height of the texture subimage.
format
Specifies the format of the pixel data.
The following symbolic values are accepted:
GL_RED,
GL_RG,
GL_RGB,
GL_BGR,
GL_RGBA,
GL_BGRA,
GL_DEPTH_COMPONENT, and
GL_STENCIL_INDEX.
type
Specifies the data type of the pixel data.
The following symbolic values are accepted:
GL_UNSIGNED_BYTE,
GL_BYTE,
GL_UNSIGNED_SHORT,
GL_SHORT,
GL_UNSIGNED_INT,
GL_INT,
GL_FLOAT,
GL_UNSIGNED_BYTE_3_3_2,
GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5,
GL_UNSIGNED_SHORT_5_6_5_REV,
GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1,
GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8,
GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, and
GL_UNSIGNED_INT_2_10_10_10_REV.
pixels
Specifies a pointer to the image data in memory.
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled.
glTexSubImage2D and
glTextureSubImage2D redefine a contiguous
subregion of an existing two-dimensional or one-dimensional
array texture image.
The texels referenced by pixels replace the portion of the
existing texture array with x indices xoffset and
yoffset and
If a non-zero named buffer object is bound to the GL_PIXEL_UNPACK_BUFFER target
(see glBindBuffer) while a texture image is
specified, pixels is treated as a byte offset into the buffer object's data store.
glPixelStore modes affect texture images.
glTexSubImage2D and
glTextureSubImage3D specify a
two-dimensional subtexture for the current texture unit,
specified with
glActiveTexture.
GL_STENCIL_INDEX is accepted for format only if the GL version
is 4.4 or higher.
GL_INVALID_ENUM is generated if
target or the effective target of
texture is not
GL_TEXTURE_2D,
GL_TEXTURE_CUBE_MAP_POSITIVE_X,
GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, or
GL_TEXTURE_1D_ARRAY.
GL_INVALID_OPERATION is generated by
glTextureSubImage2D if
texture is not the name of an existing
texture object.
GL_INVALID_ENUM is generated if format is not an accepted
format constant.
GL_INVALID_ENUM is generated if type is not a type constant.
GL_INVALID_VALUE is generated if level is less than 0.
GL_INVALID_VALUE may be generated if level is greater
than
GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if
GL_TEXTURE_WIDTH,
GL_TEXTURE_HEIGHT, and
GL_INVALID_VALUE is generated if width or height is less than 0.
GL_INVALID_OPERATION is generated if the texture array has not
been defined by a previous glTexImage2D operation.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_BYTE_3_3_2,
GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5, or
GL_UNSIGNED_SHORT_5_6_5_REV
and format is not GL_RGB.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1,
GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8,
GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, or
GL_UNSIGNED_INT_2_10_10_10_REV
and format is neither GL_RGBA nor GL_BGRA.
GL_INVALID_OPERATION is generated if format is GL_STENCIL_INDEX
and the base internal format is not GL_STENCIL_INDEX.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to the
GL_PIXEL_UNPACK_BUFFER target and the buffer object's data store is currently mapped.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to the
GL_PIXEL_UNPACK_BUFFER target and the data would be unpacked from the buffer
object such that the memory reads required would exceed the data store size.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to the
GL_PIXEL_UNPACK_BUFFER target and pixels is not evenly divisible
into the number of bytes needed to store in memory a datum indicated by type.
| OpenGL Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glTexSubImage2D
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glTextureSubImage2D
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glActiveTexture, glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glCopyTexSubImage3D, glPixelStore, glTexImage1D, glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage3D, glTexParameter
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