1 2 Mesa 6.3 release notes 3 4 July 20, 2005 5 6 PLEASE READ!!!! 7 8 9 10 Introduction 11 ------------ 12 13 Mesa uses an even/odd version number scheme like the Linux kernel. 14 Odd numbered versions (such as 6.3) designate new developmental releases. 15 Even numbered versions (such as 6.2) designate stable releases. 16 17 18 19 New Features 20 ------------ 21 22 GL_ARB_draw_buffers - allows a fragment program to write to a number of 23 separate color buffers, instead of just one. 24 25 GL_OES_read_format - allows one to query the fastest glReadPixels format 26 and datatype. 27 28 GL_ARB_pixel_buffer_object - buffer objects for pixel read/write functions. 29 30 GL_EXT_framebuffer_object - allows render-to-texture and provides a 31 window-system indepedent Pbuffer facility. 32 The Mesa CVS tree contains a couple tests of this extension. 33 34 DirectFB driver, contributed by Claudio Ciccani. See docs/README.directfb 35 for details. 36 37 38 39 Vertex/Fragment Program PRINT Instruction 40 ----------------------------------------- 41 42 The GL_NV_vertex_program and GL_NV_fragment_program languages have been 43 extended with a PRINT instruction. 44 45 46 47 glDeleteTextures(), glDeletePrograms() and glDeleteBuffers() Changed 48 -------------------------------------------------------------------- 49 50 To match the behaviour of other OpenGL implementations, glDeleteTextures, 51 glDeletePrograms and glDeleteBuffers have been modified so that: 52 53 * The named texture/program/buffer ID is immediately freed for re-use. 54 55 * The actual texture object, program or buffers isn't really deleted until 56 it is no longer bound in any rendering context (the reference count 57 is zero). 58 59 Previously, the texture/program/buffer ID wasn't freed until the object 60 was really deleted. 61 62 Note that textures, programs and buffers can be shared by several rendering 63 contexts so they can't be deleted until they're unbound in _all_ contexts. 64 65 66 67 GL_EXT_framebuffer_object changes 68 --------------------------------- 69 70 Implementing this extension involved changing a lot of code (for the better). 71 72 The gl_framebuffer object now a collection of gl_renderbuffer objects. 73 Renderbuffers may store colors, stencil indices, or depth values. The 74 gl_framebuffer and gl_renderbuffer types are object-oriented in design. 75 76 All the old RGB, color index, stencil and depth-related span functions for 77 reading/writing pixels from/to buffers has changed. Now, all pixels are 78 read/written through a set of common renderbuffer functions (methods). 79 80 Most device drivers have been updated for these changes, but some haven't. 81 82 83 84 To Do (someday) items 85 --------------------- 86 Switch to freeglut 87 Increase MAX_DRAWBUFFERS 88 driver hooks for BeginQuery/EndQuery 89 90 91 92 Miscellaneous 93 ------------- 94 95 The main/get.c file is now generated with a Python script (get_gen.py). 96 97 98 99 Driver Status 100 ---------------------- --------------------- 101 XMesa (Xlib) implements OpenGL 1.5 102 OSMesa (off-screen) implements OpenGL 1.5 103 Glide (3dfx Voodoo1/2) implements OpenGL 1.3 104 SVGA implements OpenGL 1.3 105 Wind River UGL implements OpenGL 1.3 106 Windows/Win32 implements OpenGL 1.5 107 DJGPP implements OpenGL 1.5 108 GGI implements OpenGL 1.3 109 BeOS implements OpenGL 1.5 110 Allegro needs updating 111 D3D needs updating 112 113 114 ---------------------------------------------------------------------- 115
