115 lines
3.2 KiB
Groff
115 lines
3.2 KiB
Groff
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Mesa 6.3 release notes
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July 20, 2005
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PLEASE READ!!!!
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Introduction
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------------
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Mesa uses an even/odd version number scheme like the Linux kernel.
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Odd numbered versions (such as 6.3) designate new developmental releases.
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Even numbered versions (such as 6.2) designate stable releases.
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New Features
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------------
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GL_ARB_draw_buffers - allows a fragment program to write to a number of
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separate color buffers, instead of just one.
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GL_OES_read_format - allows one to query the fastest glReadPixels format
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and datatype.
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GL_ARB_pixel_buffer_object - buffer objects for pixel read/write functions.
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GL_EXT_framebuffer_object - allows render-to-texture and provides a
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window-system indepedent Pbuffer facility.
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The Mesa CVS tree contains a couple tests of this extension.
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DirectFB driver, contributed by Claudio Ciccani. See docs/README.directfb
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for details.
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Vertex/Fragment Program PRINT Instruction
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-----------------------------------------
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The GL_NV_vertex_program and GL_NV_fragment_program languages have been
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extended with a PRINT instruction.
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glDeleteTextures(), glDeletePrograms() and glDeleteBuffers() Changed
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--------------------------------------------------------------------
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To match the behaviour of other OpenGL implementations, glDeleteTextures,
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glDeletePrograms and glDeleteBuffers have been modified so that:
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* The named texture/program/buffer ID is immediately freed for re-use.
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* The actual texture object, program or buffers isn't really deleted until
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it is no longer bound in any rendering context (the reference count
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is zero).
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Previously, the texture/program/buffer ID wasn't freed until the object
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was really deleted.
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Note that textures, programs and buffers can be shared by several rendering
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contexts so they can't be deleted until they're unbound in _all_ contexts.
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GL_EXT_framebuffer_object changes
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---------------------------------
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Implementing this extension involved changing a lot of code (for the better).
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The gl_framebuffer object now a collection of gl_renderbuffer objects.
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Renderbuffers may store colors, stencil indices, or depth values. The
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gl_framebuffer and gl_renderbuffer types are object-oriented in design.
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All the old RGB, color index, stencil and depth-related span functions for
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reading/writing pixels from/to buffers has changed. Now, all pixels are
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read/written through a set of common renderbuffer functions (methods).
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Most device drivers have been updated for these changes, but some haven't.
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To Do (someday) items
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---------------------
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Switch to freeglut
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Increase MAX_DRAWBUFFERS
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driver hooks for BeginQuery/EndQuery
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Miscellaneous
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-------------
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The main/get.c file is now generated with a Python script (get_gen.py).
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Driver Status
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---------------------- ---------------------
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XMesa (Xlib) implements OpenGL 1.5
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OSMesa (off-screen) implements OpenGL 1.5
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Glide (3dfx Voodoo1/2) implements OpenGL 1.3
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SVGA implements OpenGL 1.3
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Wind River UGL implements OpenGL 1.3
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Windows/Win32 implements OpenGL 1.5
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DJGPP implements OpenGL 1.5
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GGI implements OpenGL 1.3
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BeOS implements OpenGL 1.5
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Allegro needs updating
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D3D needs updating
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----------------------------------------------------------------------
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