table of contents
other versions
GLTEXSTORAGE2D(3G) | [FIXME: manual] | GLTEXSTORAGE2D(3G) |
NAME¶
glTexStorage2D, glTextureStorage2D - simultaneously specify storage for all levels of a two-dimensional or one-dimensional array textureC SPECIFICATION¶
void glTexStorage2D(GLenum target,
GLsizei levels,
GLenum internalformat,
GLsizei width,
GLsizei height);
void glTextureStorage2D(GLuint texture,
GLsizei levels,
GLenum internalformat,
GLsizei width,
GLsizei height);
PARAMETERS¶
targetSpecifies the target to which the texture object is bound
for glTexStorage2D. Must be one of GL_TEXTURE_2D,
GL_TEXTURE_1D_ARRAY, GL_TEXTURE_RECTANGLE,
GL_PROXY_TEXTURE_2D, GL_PROXY_TEXTURE_1D_ARRAY,
GL_PROXY_TEXTURE_RECTANGLE, or GL_PROXY_TEXTURE_CUBE_MAP.
texture
Specifies the texture object name for
glTextureStorage2D. The effective target of texture must be one
of the valid non-proxy target values above.
levels
Specify the number of texture levels.
internalformat
Specifies the sized internal format to be used to store
texture image data.
width
Specifies the width of the texture, in texels.
height
Specifies the height of the texture, in texels.
DESCRIPTION¶
glTexStorage2D and glTextureStorage2D specify the storage requirements for all levels of a two-dimensional texture or one-dimensional texture array simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an immutable-format texture. The behavior of glTexStorage2D depends on the target parameter. When target is GL_TEXTURE_2D, GL_PROXY_TEXTURE_2D, GL_TEXTURE_RECTANGLE, GL_PROXY_TEXTURE_RECTANGLE or GL_PROXY_TEXTURE_CUBE_MAP, calling glTexStorage2D is equivalent, assuming no errors are generated, to executing the following pseudo-code:for (i = 0; i < levels; i++) { glTexImage2D(target, i, internalformat, width, height, 0, format, type, NULL); width = max(1, (width / 2)); height = max(1, (height / 2)); }
for (i = 0; i < levels; i++) { for (face in (+X, -X, +Y, -Y, +Z, -Z)) { glTexImage2D(face, i, internalformat, width, height, 0, format, type, NULL); } width = max(1, (width / 2)); height = max(1, (height / 2)); }
for (i = 0; i < levels; i++) { glTexImage2D(target, i, internalformat, width, height, 0, format, type, NULL); width = max(1, (width / 2)); }
Sized Internal Format | Base Internal Format | Red Bits | Green Bits | Blue Bits | Alpha Bits | Shared Bits |
GL_R8 | GL_RED | 8 | ||||
GL_R8_SNORM | GL_RED | s8 | ||||
GL_R16 | GL_RED | 16 | ||||
GL_R16_SNORM | GL_RED | s16 | ||||
GL_RG8 | GL_RG | 8 | 8 | |||
GL_RG8_SNORM | GL_RG | s8 | s8 | |||
GL_RG16 | GL_RG | 16 | 16 | |||
GL_RG16_SNORM | GL_RG | s16 | s16 | |||
GL_R3_G3_B2 | GL_RGB | 3 | 3 | 2 | ||
GL_RGB4 | GL_RGB | 4 | 4 | 4 | ||
GL_RGB5 | GL_RGB | 5 | 5 | 5 | ||
GL_RGB8 | GL_RGB | 8 | 8 | 8 | ||
GL_RGB8_SNORM | GL_RGB | s8 | s8 | s8 | ||
GL_RGB10 | GL_RGB | 10 | 10 | 10 | ||
GL_RGB12 | GL_RGB | 12 | 12 | 12 | ||
GL_RGB16_SNORM | GL_RGB | 16 | 16 | 16 | ||
GL_RGBA2 | GL_RGB | 2 | 2 | 2 | 2 | |
GL_RGBA4 | GL_RGB | 4 | 4 | 4 | 4 | |
GL_RGB5_A1 | GL_RGBA | 5 | 5 | 5 | 1 | |
GL_RGBA8 | GL_RGBA | 8 | 8 | 8 | 8 | |
GL_RGBA8_SNORM | GL_RGBA | s8 | s8 | s8 | s8 | |
GL_RGB10_A2 | GL_RGBA | 10 | 10 | 10 | 2 | |
GL_RGB10_A2UI | GL_RGBA | ui10 | ui10 | ui10 | ui2 | |
GL_RGBA12 | GL_RGBA | 12 | 12 | 12 | 12 | |
GL_RGBA16 | GL_RGBA | 16 | 16 | 16 | 16 | |
GL_SRGB8 | GL_RGB | 8 | 8 | 8 | ||
GL_SRGB8_ALPHA8 | GL_RGBA | 8 | 8 | 8 | 8 | |
GL_R16F | GL_RED | f16 | ||||
GL_RG16F | GL_RG | f16 | f16 | |||
GL_RGB16F | GL_RGB | f16 | f16 | f16 | ||
GL_RGBA16F | GL_RGBA | f16 | f16 | f16 | f16 | |
GL_R32F | GL_RED | f32 | ||||
GL_RG32F | GL_RG | f32 | f32 | |||
GL_RGB32F | GL_RGB | f32 | f32 | f32 | ||
GL_RGBA32F | GL_RGBA | f32 | f32 | f32 | f32 | |
GL_R11F_G11F_B10F | GL_RGB | f11 | f11 | f10 | ||
GL_RGB9_E5 | GL_RGB | 9 | 9 | 9 | 5 | |
GL_R8I | GL_RED | i8 | ||||
GL_R8UI | GL_RED | ui8 | ||||
GL_R16I | GL_RED | i16 | ||||
GL_R16UI | GL_RED | ui16 | ||||
GL_R32I | GL_RED | i32 | ||||
GL_R32UI | GL_RED | ui32 | ||||
GL_RG8I | GL_RG | i8 | i8 | |||
GL_RG8UI | GL_RG | ui8 | ui8 | |||
GL_RG16I | GL_RG | i16 | i16 | |||
GL_RG16UI | GL_RG | ui16 | ui16 | |||
GL_RG32I | GL_RG | i32 | i32 | |||
GL_RG32UI | GL_RG | ui32 | ui32 | |||
GL_RGB8I | GL_RGB | i8 | i8 | i8 | ||
GL_RGB8UI | GL_RGB | ui8 | ui8 | ui8 | ||
GL_RGB16I | GL_RGB | i16 | i16 | i16 | ||
GL_RGB16UI | GL_RGB | ui16 | ui16 | ui16 | ||
GL_RGB32I | GL_RGB | i32 | i32 | i32 | ||
GL_RGB32UI | GL_RGB | ui32 | ui32 | ui32 | ||
GL_RGBA8I | GL_RGBA | i8 | i8 | i8 | i8 | |
GL_RGBA8UI | GL_RGBA | ui8 | ui8 | ui8 | ui8 | |
GL_RGBA16I | GL_RGBA | i16 | i16 | i16 | i16 | |
GL_RGBA16UI | GL_RGBA | ui16 | ui16 | ui16 | ui16 | |
GL_RGBA32I | GL_RGBA | i32 | i32 | i32 | i32 | |
GL_RGBA32UI | GL_RGBA | ui32 | ui32 | ui32 | ui32 |
NOTES¶
GL_STENCIL_INDEX8ERRORS¶
GL_INVALID_OPERATION is generated by glTexStorage2D if zero is bound to target. GL_INVALID_OPERATION is generated by glTextureStorage2D if texture is not the name of an existing texture object. GL_INVALID_ENUM is generated if internalformat is not a valid sized internal format. GL_INVALID_ENUM is generated if target or the effective target of texture is not one of the accepted targets described above. GL_INVALID_VALUE is generated if width, height or levels are less than 1. GL_INVALID_OPERATION is generated if target is GL_TEXTURE_1D_ARRAY or GL_PROXY_TEXTURE_1D_ARRAY and levels is greater than log 2 width + 1. GL_INVALID_OPERATION is generated if target is not GL_TEXTURE_1D_ARRAY or GL_PROXY_TEXTURE_1D_ARRAY and levels is greater than log 2 max width , height + 1.VERSION SUPPORT¶
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 |
glTexStorage2D | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ |
glTextureStorage2D | - | - | - | - | - | - | - | - | - | - | - | ✔ |
SEE ALSO¶
glTexImage2D(), glTexStorage1D(), glTexStorage3D().COPYRIGHT¶
Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.COPYRIGHT¶
Copyright © 2011-2014 Khronos Group08/26/2014 | [FIXME: source] |