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Editing EXT CSQC COPYTOTEXTURE
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Suggested extension for copying a portion of the screen to a texture in client side QuakeC. This will essentially be a wrapper for the OpenGL function ''glCopyTexImage2D'' (http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/copyteximage2d.html). | Suggested extension for copying a portion of the screen to a texture in client side QuakeC. This will essentially be a wrapper for the OpenGL function ''glCopyTexImage2D'' (http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/copyteximage2d.html). | ||
| − | Builtin | + | Builtin function: |
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<pre>vector csqc_copytotexture(float x, float y, float w, float h, string texture);</pre> | <pre>vector csqc_copytotexture(float x, float y, float w, float h, string texture);</pre> | ||
''x, y, w, and h'' specify the portion of the screen from which to copy pixels. They use the exact same coordinate space as ''R_SetView'' does for the view portal, were the top left of the screen is 0, 0, and the width and height are vid_conwidth and vid_conheight respectively. | ''x, y, w, and h'' specify the portion of the screen from which to copy pixels. They use the exact same coordinate space as ''R_SetView'' does for the view portal, were the top left of the screen is 0, 0, and the width and height are vid_conwidth and vid_conheight respectively. | ||
| − | ''texture'' specifies the name of the destination texture which will receive the new data. It | + | ''texture'' specifies the name of the destination texture which will receive the new data. It is a string path and filename which would have been previously passed to ''precache_pic''. The currently loaded texture will be overwritten with new pixels, though it may not necessarily persist beyond a video subsystem restart. |
''glCopyTexImage2D'' requires that the destination texture have width and height be a power of two, though they don't have to be the same length. csqc_copytotexture should accept any width and height, and automatically use a larger texture. The vector returned is the s and t texture coordinates of the corner of the desired texture within the larger power-of-2 sided texture. | ''glCopyTexImage2D'' requires that the destination texture have width and height be a power of two, though they don't have to be the same length. csqc_copytotexture should accept any width and height, and automatically use a larger texture. The vector returned is the s and t texture coordinates of the corner of the desired texture within the larger power-of-2 sided texture. | ||