| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 1 | Name |
| 2 | |
| Brian Paul | dd18a4f | 2000-06-23 17:34:47 +0000 | [diff] [blame] | 3 | MESA_pixmap_colormap |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 4 | |
| 5 | Name Strings |
| 6 | |
| Brian Paul | dd18a4f | 2000-06-23 17:34:47 +0000 | [diff] [blame] | 7 | GLX_MESA_pixmap_colormap |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 8 | |
| 9 | Contact |
| 10 | |
| Brian Paul | d3b09fe | 2004-03-25 01:42:41 +0000 | [diff] [blame] | 11 | Brian Paul (brian.paul 'at' tungstengraphics.com) |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 12 | |
| 13 | Status |
| 14 | |
| 15 | Shipping since Mesa 1.2.8 in May, 1996. |
| 16 | |
| 17 | Version |
| 18 | |
| 19 | Last Modified Date: 8 June 2000 |
| 20 | |
| 21 | Number |
| 22 | |
| Brian Paul | dd18a4f | 2000-06-23 17:34:47 +0000 | [diff] [blame] | 23 | 216 |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 24 | |
| 25 | Dependencies |
| 26 | |
| 27 | OpenGL 1.0 or later is required. |
| 28 | GLX 1.0 or later is required. |
| 29 | |
| 30 | Overview |
| 31 | |
| 32 | Since Mesa allows RGB rendering into drawables with PseudoColor, |
| 33 | StaticColor, GrayScale and StaticGray visuals, Mesa needs a colormap |
| 34 | in order to compute pixel values during rendering. |
| 35 | |
| 36 | The colormap associated with a window can be queried with normal |
| 37 | Xlib functions but there is no colormap associated with pixmaps. |
| 38 | |
| 39 | The glXCreateGLXPixmapMESA function is an alternative to glXCreateGLXPixmap |
| 40 | which allows specification of a colormap. |
| 41 | |
| 42 | IP Status |
| 43 | |
| 44 | Open-source; freely implementable. |
| 45 | |
| 46 | Issues |
| 47 | |
| 48 | None. |
| 49 | |
| 50 | New Procedures and Functions |
| 51 | |
| 52 | GLXPixmap glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visual, |
| Brian Paul | dd18a4f | 2000-06-23 17:34:47 +0000 | [diff] [blame] | 53 | Pixmap pixmap, Colormap cmap ); |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 54 | |
| 55 | New Tokens |
| 56 | |
| 57 | None. |
| 58 | |
| 59 | Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors) |
| 60 | |
| 61 | Add to section 3.4.2 Off Screen Rendering |
| 62 | |
| 63 | The Mesa implementation of GLX allows RGB rendering into X windows and |
| 64 | pixmaps of any visual class, not just TrueColor or DirectColor. In order |
| 65 | to compute pixel values from RGB values Mesa requires a colormap. |
| 66 | |
| 67 | The function |
| 68 | |
| Brian Paul | dd18a4f | 2000-06-23 17:34:47 +0000 | [diff] [blame] | 69 | GLXPixmap glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visual, |
| 70 | Pixmap pixmap, Colormap cmap ); |
| Brian Paul | 7b2c0f9 | 2000-06-09 00:22:02 +0000 | [diff] [blame] | 71 | |
| 72 | allows one to create a GLXPixmap with a specific colormap. The image |
| 73 | rendered into the pixmap may then be copied to a window (which uses the |
| 74 | same colormap and visual) with the expected results. |
| 75 | |
| 76 | GLX Protocol |
| 77 | |
| 78 | None since this is a client-side extension. |
| 79 | |
| 80 | Errors |
| 81 | |
| 82 | None. |
| 83 | |
| 84 | New State |
| 85 | |
| 86 | None. |
| 87 | |
| 88 | Revision History |
| 89 | |
| 90 | 8 June 2000 - initial specification |