X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=docs%2FRELNOTES-4.1;h=92cf9196f06457278edd19f46d102e9cc1eb8c7e;hb=d003877c669414474fbe00ca423ebbb462939529;hp=eb20dc9437addd590bf22dff8eadac5e2d5b6824;hpb=e514cfea74c3322b7faba8c41191f8bf883dd24b;p=mesa.git diff --git a/docs/RELNOTES-4.1 b/docs/RELNOTES-4.1 index eb20dc9437a..92cf9196f06 100644 --- a/docs/RELNOTES-4.1 +++ b/docs/RELNOTES-4.1 @@ -1,9 +1,9 @@ Mesa 4.1 release notes - , , 2002 + October 29, 2002 - PLEASE READ!!!! + PLEASE READ!!!! @@ -65,11 +65,28 @@ GL_NV_point_sprite For rendering points as textured quads. Useful for particle effects. -GL_NV_texture_rectangle +GL_NV_texture_rectangle (new in 4.0.4 actually) Allows one to use textures with sizes that are not powers of two. Note that mipmapping and several texture wrap modes are not allowed. +GL_EXT_multi_draw_arrays + + Allows arrays of vertex arrays to be rendered with one call. + +GL_EXT_stencil_two_side + + Separate stencil modes for front and back-facing polygons. + +GLX_SGIX_fbconfig & GLX_SGIX_pbuffer + + Off-screen rendering support. + +GL_ATI_texture_mirror_once + + Adds two new texture wrap modes: GL_MIRROR_CLAMP_ATI and + GL_MIRROR_CLAMP_TO_EDGE_ATI. + Device Driver Status @@ -97,41 +114,43 @@ DOS needs updating -Porting Information -------------------- +New features in GLUT +-------------------- -When moving from Mesa 4.0.x to Mesa 4.1 there are a number of things -you may have to update. +1. Frames per second printing -1. _mesa_create_context() changes. This function now takes a pointer to - a __GLimports object. The __GLimports structure contains function - pointers to system functions like fprintf(), malloc(), etc. - The _mesa_init_default_imports() function can be used to initialize - a __GLimports object. Most device drivers (like the DRI drivers) - should use this. + GLUT now looks for an environment variable called "GLUT_FPS". If it's + set, GLUT will print out a frames/second statistic to stderr when + glutSwapBuffers() is called. By default, frames/second is computed + and displayed once every 5 seconds. You can specify a different + interval (in milliseconds) when you set the env var. For example + 'export GLUT_FPS=1000' or 'setenv GLUT_FPS 1000' will set the interval + to one second. -2. more to come... + NOTE: the demo or application must call the glutInit() function for + this to work. Otherwise, the env var will be ignored. + Finally, this feature may not be reliable in multi-window programs. -XXX Things To Do Yet XXXX -------------------------- +2. glutGetProcAddress() function -Verify x86 code for normal transformation works with new 4-element normal -vector arrays. Pretty sure the SSE code is wrong. + The new function: -Finish up NV_vertex_program support for evaluators. Vertex arrays seem -to work as of 4/21/2002. + void *glutGetProcAddress(const char *procName) -Allow multiple points to be rendered into one sw_span. + is a wrapper for glXGetProcAddressARB() and wglGetProcAddress(). It + lets you dynamically get the address of an OpenGL function at runtime. + The GLUT_API_VERSION has been bumped to 5, but I haven't bumped the + GLUT version number from 3.7 since that's probably Mark Kilgard's role. -improve point/line rendering speed. + This function should probably also be able to return the address of + GLUT functions themselves, but it doesn't do that yet. -_tnl_end() has flushing forced on. -readpixels from stencil/z should respect ctx->ReadBuffer -glVertexAttrib*NV(index>15) should cause an error. +XXX Things To Do Yet XXXX +------------------------- isosurf with vertex program exhibits some missing triangles (probably when recycling the vertex buffer for long prims). @@ -168,7 +187,7 @@ are some things to change: TEXTURE_RECT_BIT These tokens are only used for the ctx->Texture.Unit[i].Enabled and - ctx->Texture.Unit[i]._ReallyEnabled fields. Exactly 0 or 1 bit will + ctx->Texture.Unit[i]._ReallyEnabled fields. Exactly 0 or 1 bits will be set in _ReallyEnabled at any time! Q: "What's the purpose of Unit[i].Enabled vs Unit[i]._ReallyEnabled?" @@ -198,5 +217,92 @@ are some things to change: +3. Read/Draw Buffer changes + + The business of setting the current read/draw buffers in Mesa 4.0.x + was complicated. It's much simpler now in Mesa 4.1. + + Here are the changes: + + - Renamed ctx->Color.DrawDestMask to ctx->Color._DrawDestMask + - Removed ctx->Color.DriverDrawBuffer + - Removed ctx->Pixel.DriverReadBuffer + - Removed ctx->Color.MultiDrawBuffer + - Removed ctx->Driver.SetDrawBuffer() + - Removed swrast->Driver.SetReadBuffer(). + - Added ctx->Color._DrawDestMask - a bitmask of FRONT/BACK_LEFT/RIGHT_BIT + values to indicate the current draw buffers. + - Added ctx->Pixel._ReadSrcMask to indicate the source for pixel reading. + The value is _one_ of the FRONT/BACK_LEFT/RIGHT_BIT values. + - Added ctx->Driver.DrawBuffer() and ctx->Driver.ReadBuffer(). + These functions exactly correspond to glDrawBuffer and glReadBuffer calls. + Many drivers will set ctx->Driver.DrawBuffer = _swrast_DrawBuffer and + leave ctx->Draw.ReadBuffer NULL. + DRI drivers should implement their own function for ctx->Driver.DrawBuffer + and use it to set the current hardware drawing buffer. You'll probably + also want to check for GL_FRONT_AND_BACK mode and fall back to software. + Call _swrast_DrawBuffer() too, to update the swrast state. + - Added swrast->Driver.SetBuffer(). + This function should be implemented by all device drivers that use swrast. + Mesa will call it to specify the buffer to use for span reading AND + writing and point/line/triangle rendering. + There should be no confusion between current read or draw buffer anymore. + - Added swrast->CurrentBuffer to indicate which color buffer to read/draw. + Will be FRONT_LEFT_BIT, BACK_LEFT_BIT, FRONT_RIGHT_BIT or BACK_RIGHT_BIT. + This value is usually passed to swrast->Driver.SetBuffer(). + + +4. _mesa_create_context() changes. This function now takes a pointer to + a __GLimports object. The __GLimports structure contains function + pointers to system functions like fprintf(), malloc(), etc. + The _mesa_init_default_imports() function can be used to initialize + a __GLimports object. Most device drivers (like the DRI drivers) + should use this. + + +5. In tnl's struct vertex_buffer, the field "ProjectedClipCoords" + has been replaced by "NdcPtr" to better match the OpenGL spec's + terminology. + + +6. Since GL_EXT_stencil_two_side has been implemented, many of the + ctx->Stencil fields are now 2-element arrays. For example, + "GLenum Ref" is now "GLenum Ref[2]" The [0] elements are the front-face + values and the [1] elements are the back-face values. + ctx->Stencil.ActiveFace is 0 or 1 to indicate the current face for + the glStencilOp/Func/Mask() functions. + ctx->Stencil.TestTwoSide controls whether or not 1 or 2-sided stenciling + is enabled. + + +7. Removed ctx->Polygon._OffsetAny. Removed ctx->Polygon.OffsetMRD. + + +8. GLfloat / GLchan changes: + + - Changed ctx->Driver.ClearColor() to take GLfloat[4] instead of GLchan[4]. + ctx->Color.ClearColor is now GLfloat[4] too. + - Changed ctx->Driver.AlphaRef() to take GLfloat instead of GLchan. + - ctx->Color.AlphaRef is now GLfloat. + - texObj->BorderColor is now GLfloat[4]. texObj->_BorderChan is GLchan[4]. + + This is part of an effort to remove all GLchan types from core Mesa so + that someday we can support 8, 16 and 32-bit color channels dynamically + at runtime, instead of at compile-time. + + +9. GLboolean ctx->Tranform.ClipEnabled[MAX_CLIP_PLANES] has been replaced + by GLuint ctx->Transform.ClipPlanesEnabled. The later is a bitfield. + + +10. There's a new matrix_stack type in mtypes.h used for the Modelview, + Projection, Color and Texcoord matrix stacks. + + +11. The ctx->Current.* fields have changed a lot. Now, there's a + ctx->Current.Attrib[] array for all vertex attributes which matches + the NV vertex program conventions. + + ---------------------------------------------------------------------- -$Id: RELNOTES-4.1,v 1.11 2002/06/15 03:15:16 brianp Exp $ +$Id: RELNOTES-4.1,v 1.22 2002/10/29 15:06:37 brianp Exp $