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| 1 Name | 1 Name |
| 2 | 2 |
| 3 CHROMIUM_copy_texture | 3 CHROMIUM_copy_texture |
| 4 | 4 |
| 5 Name Strings | 5 Name Strings |
| 6 | 6 |
| 7 GL_CHROMIUM_copy_texture | 7 GL_CHROMIUM_copy_texture |
| 8 | 8 |
| 9 Version | 9 Version |
| 10 | 10 |
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| 29 If GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM and | 29 If GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM and |
| 30 GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM are enabled. Then no alpha | 30 GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM are enabled. Then no alpha |
| 31 processing occurs. This is the equivalent of having neither flag set. | 31 processing occurs. This is the equivalent of having neither flag set. |
| 32 | 32 |
| 33 The extension also supports copying BGRA textures and copying | 33 The extension also supports copying BGRA textures and copying |
| 34 EXTERNAL_OES texture to BGRA texture, which is not explicitly | 34 EXTERNAL_OES texture to BGRA texture, which is not explicitly |
| 35 granted by EXT_texture_format_BGRA8888. | 35 granted by EXT_texture_format_BGRA8888. |
| 36 | 36 |
| 37 New Procedures and Functions | 37 New Procedures and Functions |
| 38 | 38 |
| 39 void glCopyTextureCHROMIUM (GLenum target, GLenum source_id, | 39 The command |
| 40 GLenum dest_id, GLint level, | |
| 41 GLint internal_format, GLenum dest_type) | |
| 42 | 40 |
| 43 Copies the contents of texture referred to by <source_id> to texture | 41 void glCopyTextureCHROMIUM (GLenum target, GLenum source_id, |
| 44 <dest_id>. | 42 GLenum dest_id, |
| 43 GLint internal_format, GLenum dest_type) |
| 45 | 44 |
| 46 Texture level 0 is copied from the source image to level <level> of the | 45 Copies the contents of texture referred to by <source_id> to <dest_id> |
| 47 destination texture. The level parameter must be 0 at present. | 46 texture. If <source_id> texture is not defined or has different dimension |
| 47 to <dest_id> texture, define <source_id> texture same to <dest_id> texture. |
| 48 |
| 49 Texture level 0 is copied from the source image to level 0 of the |
| 50 destination texture. |
| 48 | 51 |
| 49 The internal format of the destination texture is converted to that | 52 The internal format of the destination texture is converted to that |
| 50 specified by <internal_format>. Must be one of the following symbolic | 53 specified by <internal_format>. Must be one of the following symbolic |
| 51 constants: GL_RGB, GL_RGBA | 54 constants: GL_RGB, GL_RGBA |
| 52 The internal format of <source_id> texture must be one of the following | 55 The internal format of <source_id> texture must be one of the following |
| 53 symbolic constants: GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, | 56 symbolic constants: GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, |
| 54 GL_RGBA, GL_BGRA_EXT | 57 GL_RGBA, GL_BGRA_EXT |
| 55 When <source_id> texture doens't contain a superset of the component | 58 When <source_id> texture doens't contain a superset of the component |
| 56 required by <internal_format>, fill the components by following rules. | 59 required by <internal_format>, fill the components by following rules. |
| 57 | 60 |
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| 80 INVALID_VALUE is generated if <source_id> or <dest_id> are not valid texture | 83 INVALID_VALUE is generated if <source_id> or <dest_id> are not valid texture |
| 81 objects. | 84 objects. |
| 82 | 85 |
| 83 INVALID_VALUE is generated if textures corresponding to <dest_id> have not | 86 INVALID_VALUE is generated if textures corresponding to <dest_id> have not |
| 84 been bound as GL_TEXTURE_2D object. | 87 been bound as GL_TEXTURE_2D object. |
| 85 | 88 |
| 86 INVALID_VALUE is generated if textures corresponding to <source_id> have not | 89 INVALID_VALUE is generated if textures corresponding to <source_id> have not |
| 87 been bound as GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_ARB or | 90 been bound as GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_ARB or |
| 88 GL_TEXTURE_EXTERNAL_OES objects. | 91 GL_TEXTURE_EXTERNAL_OES objects. |
| 89 | 92 |
| 90 INVALID_VALUE is generated if <level> is not a valid level of the | 93 INVALID_VALUE is generated if level 0 of the source texture is not defined. |
| 91 destination texture, or if level 0 of the source texture is not defined. | 94 |
| 95 The command |
| 96 |
| 97 void glCopySubTextureCHROMIUM (GLenum target, GLenum source_id, |
| 98 GLenum dest_id, |
| 99 GLint xoffset, GLint yoffset) |
| 100 |
| 101 Copies the sub contents of texture referred to by <source_id> to <dest_id> |
| 102 texture without redefining <dest_id> texture. |
| 103 |
| 104 See CopyTextureCHROMIUM for the interpretation of the <target> arguments. |
| 105 |
| 106 <xoffset> and <yoffset> specify a texel offset in the x and y direction |
| 107 respectively within the destination texture. |
| 108 |
| 109 INVALID_OPERATION is generated if source internal_format and destination |
| 110 internal_format are not one of the valid formats described above. |
| 111 |
| 112 INVALID_VALUE is generated if <target> is not GL_TEXTURE_2D. |
| 113 |
| 114 INVALID_OPERATION is generated if the destination texture has not been |
| 115 defined. |
| 116 |
| 117 INVALID_VALUE is generated if level 0 of the source texture or |
| 118 the destination texture is not defined. |
| 119 |
| 120 INVALID_VALUE is generated if <xoffset> < 0 , or <yoffset> < 0. |
| 121 |
| 122 INVALID_VALUE is generated if (<xoffset> + source_width) > dest_width, |
| 123 or (<yoffset> + source_height) > dest_height. |
| 92 | 124 |
| 93 Errors | 125 Errors |
| 94 | 126 |
| 95 None. | 127 None. |
| 96 | 128 |
| 97 New Tokens | 129 New Tokens |
| 98 | 130 |
| 99 None. | 131 None. |
| 100 | 132 |
| 101 New State | 133 New State |
| 102 | 134 |
| 103 None. | 135 None. |
| 104 | 136 |
| 105 Revision History | 137 Revision History |
| 106 | 138 |
| 107 8/1/2011 Documented the extension | 139 8/1/2011 Documented the extension |
| 108 7/4/2013 Add a new parameter dest_type to glCopyTextureCHROMIUM() | 140 7/4/2013 Add a new parameter dest_type to glCopyTextureCHROMIUM() |
| 109 16/7/2014 Add GL_TEXTURE_RECTANGLE_ARB as valid source_id target. | 141 16/7/2014 Add GL_TEXTURE_RECTANGLE_ARB as valid source_id target. |
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