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authorMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
committerMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
commitb16b9e4656e7199c2aec74a4c8ebc7a875d3ba73 (patch)
tree4361edef0d42d5bf5ac984ef72b4fac35426eae7 /nx-X11/extras/Mesa/src/mesa/main/context.c.X.original
parent0d5a83e986f39982c0924652a3662e60b1f23162 (diff)
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-/**
- * \file context.c
- * Mesa context/visual/framebuffer management functions.
- * \author Brian Paul
- */
-
-/*
- * Mesa 3-D graphics library
- * Version: 6.4
- *
- * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \mainpage Mesa Main Module
- *
- * \section MainIntroduction Introduction
- *
- * The Mesa Main module consists of all the files in the main/ directory.
- * Among the features of this module are:
- * <UL>
- * <LI> Structures to represent most GL state </LI>
- * <LI> State set/get functions </LI>
- * <LI> Display lists </LI>
- * <LI> Texture unit, object and image handling </LI>
- * <LI> Matrix and attribute stacks </LI>
- * </UL>
- *
- * Other modules are responsible for API dispatch, vertex transformation,
- * point/line/triangle setup, rasterization, vertex array caching,
- * vertex/fragment programs/shaders, etc.
- *
- *
- * \section AboutDoxygen About Doxygen
- *
- * If you're viewing this information as Doxygen-generated HTML you'll
- * see the documentation index at the top of this page.
- *
- * The first line lists the Mesa source code modules.
- * The second line lists the indexes available for viewing the documentation
- * for each module.
- *
- * Selecting the <b>Main page</b> link will display a summary of the module
- * (this page).
- *
- * Selecting <b>Data Structures</b> will list all C structures.
- *
- * Selecting the <b>File List</b> link will list all the source files in
- * the module.
- * Selecting a filename will show a list of all functions defined in that file.
- *
- * Selecting the <b>Data Fields</b> link will display a list of all
- * documented structure members.
- *
- * Selecting the <b>Globals</b> link will display a list
- * of all functions, structures, global variables and macros in the module.
- *
- */
-
-
-#include "glheader.h"
-#include "imports.h"
-#include "accum.h"
-#include "attrib.h"
-#include "blend.h"
-#include "buffers.h"
-#include "bufferobj.h"
-#include "colortab.h"
-#include "context.h"
-#include "debug.h"
-#include "depth.h"
-#include "dlist.h"
-#include "eval.h"
-#include "enums.h"
-#include "extensions.h"
-#include "fbobject.h"
-#include "feedback.h"
-#include "fog.h"
-#include "get.h"
-#include "glthread.h"
-#include "glapioffsets.h"
-#include "histogram.h"
-#include "hint.h"
-#include "hash.h"
-#include "light.h"
-#include "lines.h"
-#include "macros.h"
-#include "matrix.h"
-#include "occlude.h"
-#include "pixel.h"
-#include "points.h"
-#include "polygon.h"
-#if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
-#include "program.h"
-#endif
-#include "rastpos.h"
-#include "simple_list.h"
-#include "state.h"
-#include "stencil.h"
-#include "texcompress.h"
-#include "teximage.h"
-#include "texobj.h"
-#include "texstate.h"
-#include "mtypes.h"
-#include "varray.h"
-#include "version.h"
-#include "vtxfmt.h"
-#if _HAVE_FULL_GL
-#include "math/m_translate.h"
-#include "math/m_matrix.h"
-#include "math/m_xform.h"
-#include "math/mathmod.h"
-#endif
-#include "shaderobjects.h"
-
-#ifdef USE_SPARC_ASM
-#include "sparc/sparc.h"
-#endif
-
-#ifndef MESA_VERBOSE
-int MESA_VERBOSE = 0;
-#endif
-
-#ifndef MESA_DEBUG_FLAGS
-int MESA_DEBUG_FLAGS = 0;
-#endif
-
-
-/* ubyte -> float conversion */
-GLfloat _mesa_ubyte_to_float_color_tab[256];
-
-static void
-free_shared_state( GLcontext *ctx, struct gl_shared_state *ss );
-
-
-/**********************************************************************/
-/** \name OpenGL SI-style interface (new in Mesa 3.5)
- *
- * \if subset
- * \note Most of these functions are never called in the Mesa subset.
- * \endif
- */
-/*@{*/
-
-/**
- * Destroy context callback.
- *
- * \param gc context.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- *
- * \ifnot subset
- * Called by window system/device driver (via __GLexports::destroyCurrent) when
- * the rendering context is to be destroyed.
- * \endif
- *
- * Frees the context data and the context structure.
- */
-GLboolean
-_mesa_destroyContext(__GLcontext *gc)
-{
- if (gc) {
- _mesa_free_context_data(gc);
- _mesa_free(gc);
- }
- return GL_TRUE;
-}
-
-/**
- * Unbind context callback.
- *
- * \param gc context.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- *
- * \ifnot subset
- * Called by window system/device driver (via __GLexports::loseCurrent)
- * when the rendering context is made non-current.
- * \endif
- *
- * No-op
- */
-GLboolean
-_mesa_loseCurrent(__GLcontext *gc)
-{
- /* XXX unbind context from thread */
- (void) gc;
- return GL_TRUE;
-}
-
-/**
- * Bind context callback.
- *
- * \param gc context.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- *
- * \ifnot subset
- * Called by window system/device driver (via __GLexports::makeCurrent)
- * when the rendering context is made current.
- * \endif
- *
- * No-op
- */
-GLboolean
-_mesa_makeCurrent(__GLcontext *gc)
-{
- /* XXX bind context to thread */
- (void) gc;
- return GL_TRUE;
-}
-
-/**
- * Share context callback.
- *
- * \param gc context.
- * \param gcShare shared context.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- *
- * \ifnot subset
- * Called by window system/device driver (via __GLexports::shareContext)
- * \endif
- *
- * Update the shared context reference count, gl_shared_state::RefCount.
- */
-GLboolean
-_mesa_shareContext(__GLcontext *gc, __GLcontext *gcShare)
-{
- if (gc && gcShare && gc->Shared && gcShare->Shared) {
- gc->Shared->RefCount--;
- if (gc->Shared->RefCount == 0) {
- free_shared_state(gc, gc->Shared);
- }
- gc->Shared = gcShare->Shared;
- gc->Shared->RefCount++;
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
-}
-
-
-#if _HAVE_FULL_GL
-/**
- * Copy context callback.
- */
-GLboolean
-_mesa_copyContext(__GLcontext *dst, const __GLcontext *src, GLuint mask)
-{
- if (dst && src) {
- _mesa_copy_context( src, dst, mask );
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
-}
-#endif
-
-/** No-op */
-GLboolean
-_mesa_forceCurrent(__GLcontext *gc)
-{
- (void) gc;
- return GL_TRUE;
-}
-
-/**
- * Windows/buffer resizing notification callback.
- *
- * \param gc GL context.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- */
-GLboolean
-_mesa_notifyResize(__GLcontext *gc)
-{
- GLint x, y;
- GLuint width, height;
- __GLdrawablePrivate *d = gc->imports.getDrawablePrivate(gc);
- if (!d || !d->getDrawableSize)
- return GL_FALSE;
- d->getDrawableSize( d, &x, &y, &width, &height );
- /* update viewport, resize software buffers, etc. */
- return GL_TRUE;
-}
-
-/**
- * Window/buffer destruction notification callback.
- *
- * \param gc GL context.
- *
- * Called when the context's window/buffer is going to be destroyed.
- *
- * No-op
- */
-void
-_mesa_notifyDestroy(__GLcontext *gc)
-{
- /* Unbind from it. */
- (void) gc;
-}
-
-/**
- * Swap buffers notification callback.
- *
- * \param gc GL context.
- *
- * Called by window system just before swapping buffers.
- * We have to finish any pending rendering.
- */
-void
-_mesa_notifySwapBuffers(__GLcontext *gc)
-{
- FLUSH_VERTICES( gc, 0 );
-}
-
-/** No-op */
-struct __GLdispatchStateRec *
-_mesa_dispatchExec(__GLcontext *gc)
-{
- (void) gc;
- return NULL;
-}
-
-/** No-op */
-void
-_mesa_beginDispatchOverride(__GLcontext *gc)
-{
- (void) gc;
-}
-
-/** No-op */
-void
-_mesa_endDispatchOverride(__GLcontext *gc)
-{
- (void) gc;
-}
-
-/**
- * \ifnot subset
- * Setup the exports.
- *
- * The window system will call these functions when it needs Mesa to do
- * something.
- *
- * \note Device drivers should override these functions! For example,
- * the Xlib driver should plug in the XMesa*-style functions into this
- * structure. The XMesa-style functions should then call the _mesa_*
- * version of these functions. This is an approximation to OO design
- * (inheritance and virtual functions).
- * \endif
- *
- * \if subset
- * No-op.
- *
- * \endif
- */
-static void
-_mesa_init_default_exports(__GLexports *exports)
-{
-#if _HAVE_FULL_GL
- exports->destroyContext = _mesa_destroyContext;
- exports->loseCurrent = _mesa_loseCurrent;
- exports->makeCurrent = _mesa_makeCurrent;
- exports->shareContext = _mesa_shareContext;
- exports->copyContext = _mesa_copyContext;
- exports->forceCurrent = _mesa_forceCurrent;
- exports->notifyResize = _mesa_notifyResize;
- exports->notifyDestroy = _mesa_notifyDestroy;
- exports->notifySwapBuffers = _mesa_notifySwapBuffers;
- exports->dispatchExec = _mesa_dispatchExec;
- exports->beginDispatchOverride = _mesa_beginDispatchOverride;
- exports->endDispatchOverride = _mesa_endDispatchOverride;
-#else
- (void) exports;
-#endif
-}
-
-/**
- * Exported OpenGL SI interface.
- */
-__GLcontext *
-__glCoreCreateContext(__GLimports *imports, __GLcontextModes *modes)
-{
- GLcontext *ctx;
-
- ctx = (GLcontext *) (*imports->calloc)(NULL, 1, sizeof(GLcontext));
- if (ctx == NULL) {
- return NULL;
- }
-
- /* XXX doesn't work at this time */
- _mesa_initialize_context(ctx, modes, NULL, NULL, NULL);
- ctx->imports = *imports;
-
- return ctx;
-}
-
-/**
- * Exported OpenGL SI interface.
- */
-void
-__glCoreNopDispatch(void)
-{
-#if 0
- /* SI */
- __gl_dispatch = __glNopDispatchState;
-#else
- /* Mesa */
- _glapi_set_dispatch(NULL);
-#endif
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name GL Visual allocation/destruction */
-/**********************************************************************/
-/*@{*/
-
-/**
- * Allocates a GLvisual structure and initializes it via
- * _mesa_initialize_visual().
- *
- * \param rgbFlag GL_TRUE for RGB(A) mode, GL_FALSE for Color Index mode.
- * \param dbFlag double buffering
- * \param stereoFlag stereo buffer
- * \param depthBits requested bits per depth buffer value. Any value in [0, 32]
- * is acceptable but the actual depth type will be GLushort or GLuint as
- * needed.
- * \param stencilBits requested minimum bits per stencil buffer value
- * \param accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits number of bits per color component in accum buffer.
- * \param indexBits number of bits per pixel if \p rgbFlag is GL_FALSE
- * \param redBits number of bits per color component in frame buffer for RGB(A)
- * mode. We always use 8 in core Mesa though.
- * \param greenBits same as above.
- * \param blueBits same as above.
- * \param alphaBits same as above.
- * \param numSamples not really used.
- *
- * \return pointer to new GLvisual or NULL if requested parameters can't be
- * met.
- *
- * \note Need to add params for level and numAuxBuffers (at least)
- */
-GLvisual *
-_mesa_create_visual( GLboolean rgbFlag,
- GLboolean dbFlag,
- GLboolean stereoFlag,
- GLint redBits,
- GLint greenBits,
- GLint blueBits,
- GLint alphaBits,
- GLint indexBits,
- GLint depthBits,
- GLint stencilBits,
- GLint accumRedBits,
- GLint accumGreenBits,
- GLint accumBlueBits,
- GLint accumAlphaBits,
- GLint numSamples )
-{
- GLvisual *vis = (GLvisual *) CALLOC( sizeof(GLvisual) );
- if (vis) {
- if (!_mesa_initialize_visual(vis, rgbFlag, dbFlag, stereoFlag,
- redBits, greenBits, blueBits, alphaBits,
- indexBits, depthBits, stencilBits,
- accumRedBits, accumGreenBits,
- accumBlueBits, accumAlphaBits,
- numSamples)) {
- FREE(vis);
- return NULL;
- }
- }
- return vis;
-}
-
-/**
- * Makes some sanity checks and fills in the fields of the
- * GLvisual object with the given parameters. If the caller needs
- * to set additional fields, he should just probably init the whole GLvisual
- * object himself.
- * \return GL_TRUE on success, or GL_FALSE on failure.
- *
- * \sa _mesa_create_visual() above for the parameter description.
- */
-GLboolean
-_mesa_initialize_visual( GLvisual *vis,
- GLboolean rgbFlag,
- GLboolean dbFlag,
- GLboolean stereoFlag,
- GLint redBits,
- GLint greenBits,
- GLint blueBits,
- GLint alphaBits,
- GLint indexBits,
- GLint depthBits,
- GLint stencilBits,
- GLint accumRedBits,
- GLint accumGreenBits,
- GLint accumBlueBits,
- GLint accumAlphaBits,
- GLint numSamples )
-{
- assert(vis);
-
- if (depthBits < 0 || depthBits > 32) {
- return GL_FALSE;
- }
- if (stencilBits < 0 || stencilBits > STENCIL_BITS) {
- return GL_FALSE;
- }
- if (accumRedBits < 0 || accumRedBits > ACCUM_BITS) {
- return GL_FALSE;
- }
- if (accumGreenBits < 0 || accumGreenBits > ACCUM_BITS) {
- return GL_FALSE;
- }
- if (accumBlueBits < 0 || accumBlueBits > ACCUM_BITS) {
- return GL_FALSE;
- }
- if (accumAlphaBits < 0 || accumAlphaBits > ACCUM_BITS) {
- return GL_FALSE;
- }
-
- vis->rgbMode = rgbFlag;
- vis->doubleBufferMode = dbFlag;
- vis->stereoMode = stereoFlag;
-
- vis->redBits = redBits;
- vis->greenBits = greenBits;
- vis->blueBits = blueBits;
- vis->alphaBits = alphaBits;
- vis->rgbBits = redBits + greenBits + blueBits;
-
- vis->indexBits = indexBits;
- vis->depthBits = depthBits;
- vis->stencilBits = stencilBits;
-
- vis->accumRedBits = accumRedBits;
- vis->accumGreenBits = accumGreenBits;
- vis->accumBlueBits = accumBlueBits;
- vis->accumAlphaBits = accumAlphaBits;
-
- vis->haveAccumBuffer = accumRedBits > 0;
- vis->haveDepthBuffer = depthBits > 0;
- vis->haveStencilBuffer = stencilBits > 0;
-
- vis->numAuxBuffers = 0;
- vis->level = 0;
- vis->pixmapMode = 0;
- vis->sampleBuffers = numSamples > 0 ? 1 : 0;
- vis->samples = numSamples;
-
- return GL_TRUE;
-}
-
-
-/**
- * Destroy a visual and free its memory.
- *
- * \param vis visual.
- *
- * Frees the visual structure.
- */
-void
-_mesa_destroy_visual( GLvisual *vis )
-{
- FREE(vis);
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name Context allocation, initialization, destroying
- *
- * The purpose of the most initialization functions here is to provide the
- * default state values according to the OpenGL specification.
- */
-/**********************************************************************/
-/*@{*/
-
-/**
- * One-time initialization mutex lock.
- *
- * \sa Used by one_time_init().
- */
-_glthread_DECLARE_STATIC_MUTEX(OneTimeLock);
-
-/**
- * Calls all the various one-time-init functions in Mesa.
- *
- * While holding a global mutex lock, calls several initialization functions,
- * and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
- * defined.
- *
- * \sa _mesa_init_lists(), _math_init().
- */
-static void
-one_time_init( GLcontext *ctx )
-{
- static GLboolean alreadyCalled = GL_FALSE;
- (void) ctx;
- _glthread_LOCK_MUTEX(OneTimeLock);
- if (!alreadyCalled) {
- GLuint i;
-
- /* do some implementation tests */
- assert( sizeof(GLbyte) == 1 );
- assert( sizeof(GLubyte) == 1 );
- assert( sizeof(GLshort) == 2 );
- assert( sizeof(GLushort) == 2 );
- assert( sizeof(GLint) == 4 );
- assert( sizeof(GLuint) == 4 );
-
- _mesa_init_lists();
-
-#if _HAVE_FULL_GL
- _math_init();
-
- for (i = 0; i < 256; i++) {
- _mesa_ubyte_to_float_color_tab[i] = (float) i / 255.0F;
- }
-#endif
-
-#ifdef USE_SPARC_ASM
- _mesa_init_sparc_glapi_relocs();
-#endif
- if (_mesa_getenv("MESA_DEBUG")) {
- _glapi_noop_enable_warnings(GL_TRUE);
- _glapi_set_warning_func( (_glapi_warning_func) _mesa_warning );
- }
- else {
- _glapi_noop_enable_warnings(GL_FALSE);
- }
-
-#if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
- _mesa_debug(ctx, "Mesa %s DEBUG build %s %s\n",
- MESA_VERSION_STRING, __DATE__, __TIME__);
-#endif
-
- alreadyCalled = GL_TRUE;
- }
- _glthread_UNLOCK_MUTEX(OneTimeLock);
-}
-
-
-/**
- * Allocate and initialize a shared context state structure.
- * Initializes the display list, texture objects and vertex programs hash
- * tables, allocates the texture objects. If it runs out of memory, frees
- * everything already allocated before returning NULL.
- *
- * \return pointer to a gl_shared_state structure on success, or NULL on
- * failure.
- */
-static GLboolean
-alloc_shared_state( GLcontext *ctx )
-{
- struct gl_shared_state *ss = CALLOC_STRUCT(gl_shared_state);
- if (!ss)
- return GL_FALSE;
-
- ctx->Shared = ss;
-
- _glthread_INIT_MUTEX(ss->Mutex);
-
- ss->DisplayList = _mesa_NewHashTable();
- ss->TexObjects = _mesa_NewHashTable();
-#if FEATURE_NV_vertex_program || FEATURE_NV_fragment_program
- ss->Programs = _mesa_NewHashTable();
-#endif
-
-#if FEATURE_ARB_vertex_program
- ss->DefaultVertexProgram = ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
- if (!ss->DefaultVertexProgram)
- goto cleanup;
-#endif
-#if FEATURE_ARB_fragment_program
- ss->DefaultFragmentProgram = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
- if (!ss->DefaultFragmentProgram)
- goto cleanup;
-#endif
-#if FEATURE_ATI_fragment_shader
- ss->DefaultFragmentShader = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_SHADER_ATI, 0);
- if (!ss->DefaultFragmentShader)
- goto cleanup;
-#endif
-
- ss->BufferObjects = _mesa_NewHashTable();
-
- ss->GL2Objects = _mesa_NewHashTable ();
-
- ss->Default1D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_1D);
- if (!ss->Default1D)
- goto cleanup;
-
- ss->Default2D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_2D);
- if (!ss->Default2D)
- goto cleanup;
-
- ss->Default3D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_3D);
- if (!ss->Default3D)
- goto cleanup;
-
- ss->DefaultCubeMap = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_CUBE_MAP_ARB);
- if (!ss->DefaultCubeMap)
- goto cleanup;
-
- ss->DefaultRect = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_RECTANGLE_NV);
- if (!ss->DefaultRect)
- goto cleanup;
-
- /* Effectively bind the default textures to all texture units */
- ss->Default1D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
- ss->Default2D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
- ss->Default3D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
- ss->DefaultCubeMap->RefCount += MAX_TEXTURE_IMAGE_UNITS;
- ss->DefaultRect->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-
-#if FEATURE_EXT_framebuffer_object
- ss->FrameBuffers = _mesa_NewHashTable();
- if (!ss->FrameBuffers)
- goto cleanup;
- ss->RenderBuffers = _mesa_NewHashTable();
- if (!ss->RenderBuffers)
- goto cleanup;
-#endif
-
-
- return GL_TRUE;
-
- cleanup:
- /* Ran out of memory at some point. Free everything and return NULL */
- if (ss->DisplayList)
- _mesa_DeleteHashTable(ss->DisplayList);
- if (ss->TexObjects)
- _mesa_DeleteHashTable(ss->TexObjects);
-#if FEATURE_NV_vertex_program
- if (ss->Programs)
- _mesa_DeleteHashTable(ss->Programs);
-#endif
-#if FEATURE_ARB_vertex_program
- if (ss->DefaultVertexProgram)
- ctx->Driver.DeleteProgram(ctx, ss->DefaultVertexProgram);
-#endif
-#if FEATURE_ARB_fragment_program
- if (ss->DefaultFragmentProgram)
- ctx->Driver.DeleteProgram(ctx, ss->DefaultFragmentProgram);
-#endif
-#if FEATURE_ATI_fragment_shader
- if (ss->DefaultFragmentShader)
- ctx->Driver.DeleteProgram(ctx, ss->DefaultFragmentShader);
-#endif
-#if FEATURE_ARB_vertex_buffer_object
- if (ss->BufferObjects)
- _mesa_DeleteHashTable(ss->BufferObjects);
-#endif
-
- if (ss->GL2Objects)
- _mesa_DeleteHashTable (ss->GL2Objects);
-
-#if FEATURE_EXT_framebuffer_object
- if (ss->FrameBuffers)
- _mesa_DeleteHashTable(ss->FrameBuffers);
- if (ss->RenderBuffers)
- _mesa_DeleteHashTable(ss->RenderBuffers);
-#endif
-
- if (ss->Default1D)
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default1D);
- if (ss->Default2D)
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default2D);
- if (ss->Default3D)
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default3D);
- if (ss->DefaultCubeMap)
- (*ctx->Driver.DeleteTexture)(ctx, ss->DefaultCubeMap);
- if (ss->DefaultRect)
- (*ctx->Driver.DeleteTexture)(ctx, ss->DefaultRect);
- if (ss)
- _mesa_free(ss);
- return GL_FALSE;
-}
-
-/**
- * Deallocate a shared state context and all children structures.
- *
- * \param ctx GL context.
- * \param ss shared state pointer.
- *
- * Frees the display lists, the texture objects (calling the driver texture
- * deletion callback to free its private data) and the vertex programs, as well
- * as their hash tables.
- *
- * \sa alloc_shared_state().
- */
-static void
-free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
-{
- /* Free display lists */
- while (1) {
- GLuint list = _mesa_HashFirstEntry(ss->DisplayList);
- if (list) {
- _mesa_destroy_list(ctx, list);
- }
- else {
- break;
- }
- }
- _mesa_DeleteHashTable(ss->DisplayList);
-
- /* Free texture objects */
- ASSERT(ctx->Driver.DeleteTexture);
- /* the default textures */
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default1D);
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default2D);
- (*ctx->Driver.DeleteTexture)(ctx, ss->Default3D);
- (*ctx->Driver.DeleteTexture)(ctx, ss->DefaultCubeMap);
- (*ctx->Driver.DeleteTexture)(ctx, ss->DefaultRect);
- /* all other textures */
- while (1) {
- GLuint texName = _mesa_HashFirstEntry(ss->TexObjects);
- if (texName) {
- struct gl_texture_object *texObj = (struct gl_texture_object *)
- _mesa_HashLookup(ss->TexObjects, texName);
- ASSERT(texObj);
- (*ctx->Driver.DeleteTexture)(ctx, texObj);
- _mesa_HashRemove(ss->TexObjects, texName);
- }
- else {
- break;
- }
- }
- _mesa_DeleteHashTable(ss->TexObjects);
-
-#if FEATURE_NV_vertex_program
- /* Free vertex programs */
- while (1) {
- GLuint prog = _mesa_HashFirstEntry(ss->Programs);
- if (prog) {
- struct program *p = (struct program *) _mesa_HashLookup(ss->Programs,
- prog);
- ASSERT(p);
- ctx->Driver.DeleteProgram(ctx, p);
- _mesa_HashRemove(ss->Programs, prog);
- }
- else {
- break;
- }
- }
- _mesa_DeleteHashTable(ss->Programs);
-#endif
-#if FEATURE_ARB_vertex_program
- _mesa_delete_program(ctx, ss->DefaultVertexProgram);
-#endif
-#if FEATURE_ARB_fragment_program
- _mesa_delete_program(ctx, ss->DefaultFragmentProgram);
-#endif
-#if FEATURE_ATI_fragment_shader
- _mesa_delete_program(ctx, ss->DefaultFragmentShader);
-#endif
-
-#if FEATURE_ARB_vertex_buffer_object
- _mesa_DeleteHashTable(ss->BufferObjects);
-#endif
-
- _mesa_DeleteHashTable (ss->GL2Objects);
-
-#if FEATURE_EXT_framebuffer_object
- _mesa_DeleteHashTable(ss->FrameBuffers);
- _mesa_DeleteHashTable(ss->RenderBuffers);
-#endif
-
- _glthread_DESTROY_MUTEX(ss->Mutex);
-
- FREE(ss);
-}
-
-
-/**
- * Initialize fields of gl_current_attrib (aka ctx->Current.*)
- */
-static void
-_mesa_init_current( GLcontext *ctx )
-{
- GLuint i;
-
- /* Current group */
- for (i = 0; i < VERT_ATTRIB_MAX; i++) {
- ASSIGN_4V( ctx->Current.Attrib[i], 0.0, 0.0, 0.0, 1.0 );
- }
- /* special cases: */
- ASSIGN_4V( ctx->Current.Attrib[VERT_ATTRIB_WEIGHT], 1.0, 0.0, 0.0, 1.0 );
- ASSIGN_4V( ctx->Current.Attrib[VERT_ATTRIB_NORMAL], 0.0, 0.0, 1.0, 1.0 );
- ASSIGN_4V( ctx->Current.Attrib[VERT_ATTRIB_COLOR0], 1.0, 1.0, 1.0, 1.0 );
- ASSIGN_4V( ctx->Current.Attrib[VERT_ATTRIB_COLOR1], 0.0, 0.0, 0.0, 1.0 );
- ASSIGN_4V( ctx->Current.Attrib[VERT_ATTRIB_FOG], 0.0, 0.0, 0.0, 0.0 );
-
- ctx->Current.Index = 1;
- ctx->Current.EdgeFlag = GL_TRUE;
-}
-
-
-/**
- * Initialize fields of gl_constants (aka ctx->Const.*).
- * Use defaults from config.h. The device drivers will often override
- * some of these values (such as number of texture units).
- */
-static void
-_mesa_init_constants( GLcontext *ctx )
-{
- assert(ctx);
-
- assert(MAX_TEXTURE_LEVELS >= MAX_3D_TEXTURE_LEVELS);
- assert(MAX_TEXTURE_LEVELS >= MAX_CUBE_TEXTURE_LEVELS);
-
- /* Constants, may be overriden (usually only reduced) by device drivers */
- ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
- ctx->Const.Max3DTextureLevels = MAX_3D_TEXTURE_LEVELS;
- ctx->Const.MaxCubeTextureLevels = MAX_CUBE_TEXTURE_LEVELS;
- ctx->Const.MaxTextureRectSize = MAX_TEXTURE_RECT_SIZE;
- ctx->Const.MaxTextureUnits = MAX_TEXTURE_UNITS;
- ctx->Const.MaxTextureCoordUnits = MAX_TEXTURE_COORD_UNITS;
- ctx->Const.MaxTextureImageUnits = MAX_TEXTURE_IMAGE_UNITS;
- ctx->Const.MaxTextureMaxAnisotropy = MAX_TEXTURE_MAX_ANISOTROPY;
- ctx->Const.MaxTextureLodBias = MAX_TEXTURE_LOD_BIAS;
- ctx->Const.MaxArrayLockSize = MAX_ARRAY_LOCK_SIZE;
- ctx->Const.SubPixelBits = SUB_PIXEL_BITS;
- ctx->Const.MinPointSize = MIN_POINT_SIZE;
- ctx->Const.MaxPointSize = MAX_POINT_SIZE;
- ctx->Const.MinPointSizeAA = MIN_POINT_SIZE;
- ctx->Const.MaxPointSizeAA = MAX_POINT_SIZE;
- ctx->Const.PointSizeGranularity = (GLfloat) POINT_SIZE_GRANULARITY;
- ctx->Const.MinLineWidth = MIN_LINE_WIDTH;
- ctx->Const.MaxLineWidth = MAX_LINE_WIDTH;
- ctx->Const.MinLineWidthAA = MIN_LINE_WIDTH;
- ctx->Const.MaxLineWidthAA = MAX_LINE_WIDTH;
- ctx->Const.LineWidthGranularity = (GLfloat) LINE_WIDTH_GRANULARITY;
- ctx->Const.MaxColorTableSize = MAX_COLOR_TABLE_SIZE;
- ctx->Const.MaxConvolutionWidth = MAX_CONVOLUTION_WIDTH;
- ctx->Const.MaxConvolutionHeight = MAX_CONVOLUTION_HEIGHT;
- ctx->Const.MaxClipPlanes = MAX_CLIP_PLANES;
- ctx->Const.MaxLights = MAX_LIGHTS;
- ctx->Const.MaxShininess = 128.0;
- ctx->Const.MaxSpotExponent = 128.0;
- ctx->Const.MaxViewportWidth = MAX_WIDTH;
- ctx->Const.MaxViewportHeight = MAX_HEIGHT;
-#if FEATURE_ARB_vertex_program
- ctx->Const.MaxVertexProgramInstructions = MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS;
- ctx->Const.MaxVertexProgramAttribs = MAX_NV_VERTEX_PROGRAM_INPUTS;
- ctx->Const.MaxVertexProgramTemps = MAX_NV_VERTEX_PROGRAM_TEMPS;
- ctx->Const.MaxVertexProgramLocalParams = MAX_NV_VERTEX_PROGRAM_PARAMS;
- ctx->Const.MaxVertexProgramEnvParams = MAX_NV_VERTEX_PROGRAM_PARAMS;/*XXX*/
- ctx->Const.MaxVertexProgramAddressRegs = MAX_VERTEX_PROGRAM_ADDRESS_REGS;
-#endif
-#if FEATURE_ARB_fragment_program
- ctx->Const.MaxFragmentProgramInstructions = MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS;
- ctx->Const.MaxFragmentProgramAttribs = MAX_NV_FRAGMENT_PROGRAM_INPUTS;
- ctx->Const.MaxFragmentProgramTemps = MAX_NV_FRAGMENT_PROGRAM_TEMPS;
- ctx->Const.MaxFragmentProgramLocalParams = MAX_NV_FRAGMENT_PROGRAM_PARAMS;
- ctx->Const.MaxFragmentProgramEnvParams = MAX_NV_FRAGMENT_PROGRAM_PARAMS;/*XXX*/
- ctx->Const.MaxFragmentProgramAddressRegs = MAX_FRAGMENT_PROGRAM_ADDRESS_REGS;
- ctx->Const.MaxFragmentProgramAluInstructions = MAX_FRAGMENT_PROGRAM_ALU_INSTRUCTIONS;
- ctx->Const.MaxFragmentProgramTexInstructions = MAX_FRAGMENT_PROGRAM_TEX_INSTRUCTIONS;
- ctx->Const.MaxFragmentProgramTexIndirections = MAX_FRAGMENT_PROGRAM_TEX_INDIRECTIONS;
-#endif
-
- ctx->Const.MaxProgramMatrices = MAX_PROGRAM_MATRICES;
- ctx->Const.MaxProgramMatrixStackDepth = MAX_PROGRAM_MATRIX_STACK_DEPTH;
-
- /* If we're running in the X server, do bounds checking to prevent
- * segfaults and server crashes!
- */
-#if defined(XFree86LOADER) && defined(IN_MODULE)
- ctx->Const.CheckArrayBounds = GL_TRUE;
-#else
- ctx->Const.CheckArrayBounds = GL_FALSE;
-#endif
-
- ctx->Const.MaxDrawBuffers = MAX_DRAW_BUFFERS;
-
- /* GL_OES_read_format */
- ctx->Const.ColorReadFormat = GL_RGBA;
- ctx->Const.ColorReadType = GL_UNSIGNED_BYTE;
-
-#if FEATURE_EXT_framebuffer_object
- ctx->Const.MaxColorAttachments = MAX_COLOR_ATTACHMENTS;
- ctx->Const.MaxRenderbufferSize = MAX_WIDTH;
-#endif
-
- /* sanity checks */
- ASSERT(ctx->Const.MaxTextureUnits == MAX2(ctx->Const.MaxTextureImageUnits, ctx->Const.MaxTextureCoordUnits));
-}
-
-
-/**
- * Initialize the attribute groups in a GL context.
- *
- * \param ctx GL context.
- *
- * Initializes all the attributes, calling the respective <tt>init*</tt>
- * functions for the more complex data structures.
- */
-static GLboolean
-init_attrib_groups( GLcontext *ctx )
-{
- assert(ctx);
-
- /* Constants */
- _mesa_init_constants( ctx );
-
- /* Extensions */
- _mesa_init_extensions( ctx );
-
- /* Attribute Groups */
- _mesa_init_accum( ctx );
- _mesa_init_attrib( ctx );
- _mesa_init_buffer_objects( ctx );
- _mesa_init_color( ctx );
- _mesa_init_colortables( ctx );
- _mesa_init_current( ctx );
- _mesa_init_depth( ctx );
- _mesa_init_debug( ctx );
- _mesa_init_display_list( ctx );
- _mesa_init_eval( ctx );
- _mesa_init_feedback( ctx );
- _mesa_init_fog( ctx );
- _mesa_init_histogram( ctx );
- _mesa_init_hint( ctx );
- _mesa_init_line( ctx );
- _mesa_init_lighting( ctx );
- _mesa_init_matrix( ctx );
- _mesa_init_multisample( ctx );
- _mesa_init_occlude( ctx );
- _mesa_init_pixel( ctx );
- _mesa_init_point( ctx );
- _mesa_init_polygon( ctx );
- _mesa_init_program( ctx );
- _mesa_init_rastpos( ctx );
- _mesa_init_scissor( ctx );
- _mesa_init_shaderobjects (ctx);
- _mesa_init_stencil( ctx );
- _mesa_init_transform( ctx );
- _mesa_init_varray( ctx );
- _mesa_init_viewport( ctx );
-
- if (!_mesa_init_texture( ctx ))
- return GL_FALSE;
-
- _mesa_init_texture_s3tc( ctx );
- _mesa_init_texture_fxt1( ctx );
-
- /* Miscellaneous */
- ctx->NewState = _NEW_ALL;
- ctx->ErrorValue = (GLenum) GL_NO_ERROR;
- ctx->_Facing = 0;
-#if CHAN_TYPE == GL_FLOAT
- ctx->ClampFragmentColors = GL_FALSE; /* XXX temporary */
-#else
- ctx->ClampFragmentColors = GL_TRUE;
-#endif
- ctx->ClampVertexColors = GL_TRUE;
-
- return GL_TRUE;
-}
-
-
-/**
- * This is the default function we plug into all dispatch table slots
- * This helps prevents a segfault when someone calls a GL function without
- * first checking if the extension's supported.
- */
-static int
-generic_nop(void)
-{
- _mesa_problem(NULL, "User called no-op dispatch function (an unsupported extension function?)");
- return 0;
-}
-
-
-/**
- * Allocate and initialize a new dispatch table.
- */
-static struct _glapi_table *
-alloc_dispatch_table(void)
-{
- /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
- * In practice, this'll be the same for stand-alone Mesa. But for DRI
- * Mesa we do this to accomodate different versions of libGL and various
- * DRI drivers.
- */
- GLint numEntries = MAX2(_glapi_get_dispatch_table_size(),
- sizeof(struct _glapi_table) / sizeof(_glapi_proc));
- struct _glapi_table *table =
- (struct _glapi_table *) _mesa_malloc(numEntries * sizeof(_glapi_proc));
- if (table) {
- _glapi_proc *entry = (_glapi_proc *) table;
- GLint i;
- for (i = 0; i < numEntries; i++) {
- entry[i] = (_glapi_proc) generic_nop;
- }
- }
- return table;
-}
-
-
-/**
- * Initialize a GLcontext struct (rendering context).
- *
- * This includes allocating all the other structs and arrays which hang off of
- * the context by pointers.
- * Note that the driver needs to pass in its dd_function_table here since
- * we need to at least call driverFunctions->NewTextureObject to create the
- * default texture objects.
- *
- * Called by _mesa_create_context().
- *
- * Performs the imports and exports callback tables initialization, and
- * miscellaneous one-time initializations. If no shared context is supplied one
- * is allocated, and increase its reference count. Setups the GL API dispatch
- * tables. Initialize the TNL module. Sets the maximum Z buffer depth.
- * Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
- * for debug flags.
- *
- * \param ctx the context to initialize
- * \param visual describes the visual attributes for this context
- * \param share_list points to context to share textures, display lists,
- * etc with, or NULL
- * \param driverFunctions table of device driver functions for this context
- * to use
- * \param driverContext pointer to driver-specific context data
- */
-GLboolean
-_mesa_initialize_context( GLcontext *ctx,
- const GLvisual *visual,
- GLcontext *share_list,
- const struct dd_function_table *driverFunctions,
- void *driverContext )
-{
- ASSERT(driverContext);
- assert(driverFunctions->NewTextureObject);
- assert(driverFunctions->FreeTexImageData);
-
- /* If the driver wants core Mesa to use special imports, it'll have to
- * override these defaults.
- */
- _mesa_init_default_imports( &(ctx->imports), driverContext );
-
- /* initialize the exports (Mesa functions called by the window system) */
- _mesa_init_default_exports( &(ctx->exports) );
-
- /* misc one-time initializations */
- one_time_init(ctx);
-
- ctx->Visual = *visual;
- ctx->DrawBuffer = NULL;
- ctx->ReadBuffer = NULL;
- ctx->WinSysDrawBuffer = NULL;
- ctx->WinSysReadBuffer = NULL;
-
- /* Plug in driver functions and context pointer here.
- * This is important because when we call alloc_shared_state() below
- * we'll call ctx->Driver.NewTextureObject() to create the default
- * textures.
- */
- ctx->Driver = *driverFunctions;
- ctx->DriverCtx = driverContext;
-
- if (share_list) {
- /* share state with another context */
- ctx->Shared = share_list->Shared;
- }
- else {
- /* allocate new, unshared state */
- if (!alloc_shared_state( ctx )) {
- return GL_FALSE;
- }
- }
- _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
- ctx->Shared->RefCount++;
- _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
-
- if (!init_attrib_groups( ctx )) {
- free_shared_state(ctx, ctx->Shared);
- return GL_FALSE;
- }
-
- /* setup the API dispatch tables */
- ctx->Exec = alloc_dispatch_table();
- ctx->Save = alloc_dispatch_table();
- if (!ctx->Exec || !ctx->Save) {
- free_shared_state(ctx, ctx->Shared);
- if (ctx->Exec)
- _mesa_free(ctx->Exec);
- }
- _mesa_init_exec_table(ctx->Exec);
- ctx->CurrentDispatch = ctx->Exec;
-#if _HAVE_FULL_GL
- _mesa_init_dlist_table(ctx->Save);
- _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
- /* Neutral tnl module stuff */
- _mesa_init_exec_vtxfmt( ctx );
- ctx->TnlModule.Current = NULL;
- ctx->TnlModule.SwapCount = 0;
-#endif
-
- ctx->_MaintainTexEnvProgram = (_mesa_getenv("MESA_TEX_PROG") != NULL);
- ctx->_MaintainTnlProgram = (_mesa_getenv("MESA_TNL_PROG") != NULL);
-
- return GL_TRUE;
-}
-
-
-/**
- * Allocate and initialize a GLcontext structure.
- * Note that the driver needs to pass in its dd_function_table here since
- * we need to at least call driverFunctions->NewTextureObject to initialize
- * the rendering context.
- *
- * \param visual a GLvisual pointer (we copy the struct contents)
- * \param share_list another context to share display lists with or NULL
- * \param driverFunctions points to the dd_function_table into which the
- * driver has plugged in all its special functions.
- * \param driverCtx points to the device driver's private context state
- *
- * \return pointer to a new __GLcontextRec or NULL if error.
- */
-GLcontext *
-_mesa_create_context( const GLvisual *visual,
- GLcontext *share_list,
- const struct dd_function_table *driverFunctions,
- void *driverContext )
-
-{
- GLcontext *ctx;
-
- ASSERT(visual);
- ASSERT(driverContext);
-
- ctx = (GLcontext *) _mesa_calloc(sizeof(GLcontext));
- if (!ctx)
- return NULL;
-
- if (_mesa_initialize_context(ctx, visual, share_list,
- driverFunctions, driverContext)) {
- return ctx;
- }
- else {
- _mesa_free(ctx);
- return NULL;
- }
-}
-
-
-/**
- * Free the data associated with the given context.
- *
- * But doesn't free the GLcontext struct itself.
- *
- * \sa _mesa_initialize_context() and init_attrib_groups().
- */
-void
-_mesa_free_context_data( GLcontext *ctx )
-{
- /* if we're destroying the current context, unbind it first */
- if (ctx == _mesa_get_current_context()) {
- _mesa_make_current(NULL, NULL, NULL);
- }
-
- _mesa_free_lighting_data( ctx );
- _mesa_free_eval_data( ctx );
- _mesa_free_texture_data( ctx );
- _mesa_free_matrix_data( ctx );
- _mesa_free_viewport_data( ctx );
- _mesa_free_colortables_data( ctx );
- _mesa_free_program_data(ctx);
- _mesa_free_occlude_data(ctx);
-
-#if FEATURE_ARB_vertex_buffer_object
- _mesa_delete_buffer_object(ctx, ctx->Array.NullBufferObj);
-#endif
-
- /* free dispatch tables */
- _mesa_free(ctx->Exec);
- _mesa_free(ctx->Save);
-
- /* Shared context state (display lists, textures, etc) */
- _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
- ctx->Shared->RefCount--;
- assert(ctx->Shared->RefCount >= 0);
- _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
- if (ctx->Shared->RefCount == 0) {
- /* free shared state */
- free_shared_state( ctx, ctx->Shared );
- }
-
- if (ctx->Extensions.String)
- FREE((void *) ctx->Extensions.String);
-}
-
-
-/**
- * Destroy a GLcontext structure.
- *
- * \param ctx GL context.
- *
- * Calls _mesa_free_context_data() and frees the GLcontext structure itself.
- */
-void
-_mesa_destroy_context( GLcontext *ctx )
-{
- if (ctx) {
- _mesa_free_context_data(ctx);
- FREE( (void *) ctx );
- }
-}
-
-
-#if _HAVE_FULL_GL
-/**
- * Copy attribute groups from one context to another.
- *
- * \param src source context
- * \param dst destination context
- * \param mask bitwise OR of GL_*_BIT flags
- *
- * According to the bits specified in \p mask, copies the corresponding
- * attributes from \p src into \p dst. For many of the attributes a simple \c
- * memcpy is not enough due to the existence of internal pointers in their data
- * structures.
- */
-void
-_mesa_copy_context( const GLcontext *src, GLcontext *dst, GLuint mask )
-{
- if (mask & GL_ACCUM_BUFFER_BIT) {
- /* OK to memcpy */
- dst->Accum = src->Accum;
- }
- if (mask & GL_COLOR_BUFFER_BIT) {
- /* OK to memcpy */
- dst->Color = src->Color;
- }
- if (mask & GL_CURRENT_BIT) {
- /* OK to memcpy */
- dst->Current = src->Current;
- }
- if (mask & GL_DEPTH_BUFFER_BIT) {
- /* OK to memcpy */
- dst->Depth = src->Depth;
- }
- if (mask & GL_ENABLE_BIT) {
- /* no op */
- }
- if (mask & GL_EVAL_BIT) {
- /* OK to memcpy */
- dst->Eval = src->Eval;
- }
- if (mask & GL_FOG_BIT) {
- /* OK to memcpy */
- dst->Fog = src->Fog;
- }
- if (mask & GL_HINT_BIT) {
- /* OK to memcpy */
- dst->Hint = src->Hint;
- }
- if (mask & GL_LIGHTING_BIT) {
- GLuint i;
- /* begin with memcpy */
- MEMCPY( &dst->Light, &src->Light, sizeof(struct gl_light) );
- /* fixup linked lists to prevent pointer insanity */
- make_empty_list( &(dst->Light.EnabledList) );
- for (i = 0; i < MAX_LIGHTS; i++) {
- if (dst->Light.Light[i].Enabled) {
- insert_at_tail(&(dst->Light.EnabledList), &(dst->Light.Light[i]));
- }
- }
- }
- if (mask & GL_LINE_BIT) {
- /* OK to memcpy */
- dst->Line = src->Line;
- }
- if (mask & GL_LIST_BIT) {
- /* OK to memcpy */
- dst->List = src->List;
- }
- if (mask & GL_PIXEL_MODE_BIT) {
- /* OK to memcpy */
- dst->Pixel = src->Pixel;
- }
- if (mask & GL_POINT_BIT) {
- /* OK to memcpy */
- dst->Point = src->Point;
- }
- if (mask & GL_POLYGON_BIT) {
- /* OK to memcpy */
- dst->Polygon = src->Polygon;
- }
- if (mask & GL_POLYGON_STIPPLE_BIT) {
- /* Use loop instead of MEMCPY due to problem with Portland Group's
- * C compiler. Reported by John Stone.
- */
- GLuint i;
- for (i = 0; i < 32; i++) {
- dst->PolygonStipple[i] = src->PolygonStipple[i];
- }
- }
- if (mask & GL_SCISSOR_BIT) {
- /* OK to memcpy */
- dst->Scissor = src->Scissor;
- }
- if (mask & GL_STENCIL_BUFFER_BIT) {
- /* OK to memcpy */
- dst->Stencil = src->Stencil;
- }
- if (mask & GL_TEXTURE_BIT) {
- /* Cannot memcpy because of pointers */
- _mesa_copy_texture_state(src, dst);
- }
- if (mask & GL_TRANSFORM_BIT) {
- /* OK to memcpy */
- dst->Transform = src->Transform;
- }
- if (mask & GL_VIEWPORT_BIT) {
- /* Cannot use memcpy, because of pointers in GLmatrix _WindowMap */
- dst->Viewport.X = src->Viewport.X;
- dst->Viewport.Y = src->Viewport.Y;
- dst->Viewport.Width = src->Viewport.Width;
- dst->Viewport.Height = src->Viewport.Height;
- dst->Viewport.Near = src->Viewport.Near;
- dst->Viewport.Far = src->Viewport.Far;
- _math_matrix_copy(&dst->Viewport._WindowMap, &src->Viewport._WindowMap);
- }
-
- /* XXX FIXME: Call callbacks?
- */
- dst->NewState = _NEW_ALL;
-}
-#endif
-
-
-/**
- * Check if the given context can render into the given framebuffer
- * by checking visual attributes.
- * \return GL_TRUE if compatible, GL_FALSE otherwise.
- */
-static GLboolean
-check_compatible(const GLcontext *ctx, const GLframebuffer *buffer)
-{
- const GLvisual *ctxvis = &ctx->Visual;
- const GLvisual *bufvis = &buffer->Visual;
-
- if (ctxvis == bufvis)
- return GL_TRUE;
-
- if (ctxvis->rgbMode != bufvis->rgbMode)
- return GL_FALSE;
- if (ctxvis->doubleBufferMode && !bufvis->doubleBufferMode)
- return GL_FALSE;
- if (ctxvis->stereoMode && !bufvis->stereoMode)
- return GL_FALSE;
- if (ctxvis->haveAccumBuffer && !bufvis->haveAccumBuffer)
- return GL_FALSE;
- if (ctxvis->haveDepthBuffer && !bufvis->haveDepthBuffer)
- return GL_FALSE;
- if (ctxvis->haveStencilBuffer && !bufvis->haveStencilBuffer)
- return GL_FALSE;
- if (ctxvis->redMask && ctxvis->redMask != bufvis->redMask)
- return GL_FALSE;
- if (ctxvis->greenMask && ctxvis->greenMask != bufvis->greenMask)
- return GL_FALSE;
- if (ctxvis->blueMask && ctxvis->blueMask != bufvis->blueMask)
- return GL_FALSE;
- if (ctxvis->depthBits && ctxvis->depthBits != bufvis->depthBits)
- return GL_FALSE;
- if (ctxvis->stencilBits && ctxvis->stencilBits != bufvis->stencilBits)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-
-/**
- * Bind the given context to the given draw-buffer and read-buffer and
- * make it the current context for this thread.
- *
- * \param newCtx new GL context. If NULL then there will be no current GL
- * context.
- * \param drawBuffer draw framebuffer.
- * \param readBuffer read framebuffer.
- *
- * Check that the context's and framebuffer's visuals are compatible, returning
- * immediately otherwise. Sets the glapi current context via
- * _glapi_set_context(). If \p newCtx is not NULL, associates \p drawBuffer and
- * \p readBuffer with it and calls dd_function_table::ResizeBuffers if the buffers size has changed.
- * Calls dd_function_table::MakeCurrent callback if defined.
- *
- * When a context is bound by the first time and the \c MESA_INFO environment
- * variable is set it calls print_info() as an aid for remote user
- * troubleshooting.
- */
-void
-_mesa_make_current( GLcontext *newCtx, GLframebuffer *drawBuffer,
- GLframebuffer *readBuffer )
-{
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(newCtx, "_mesa_make_current()\n");
-
- /* Check that the context's and framebuffer's visuals are compatible.
- */
- if (newCtx && drawBuffer && newCtx->DrawBuffer != drawBuffer) {
- if (!check_compatible(newCtx, drawBuffer))
- return;
- }
- if (newCtx && readBuffer && newCtx->ReadBuffer != readBuffer) {
- if (!check_compatible(newCtx, readBuffer))
- return;
- }
-
-#if !defined(IN_DRI_DRIVER)
- /* We call this function periodically (just here for now) in
- * order to detect when multithreading has begun. In a DRI driver, this
- * step is done by the driver loader (e.g., libGL).
- */
- _glapi_check_multithread();
-#endif /* !defined(IN_DRI_DRIVER) */
-
- _glapi_set_context((void *) newCtx);
- ASSERT(_mesa_get_current_context() == newCtx);
-
- if (!newCtx) {
- _glapi_set_dispatch(NULL); /* none current */
- }
- else {
- _glapi_set_dispatch(newCtx->CurrentDispatch);
-
- if (drawBuffer && readBuffer) {
- /* TODO: check if newCtx and buffer's visual match??? */
-
- ASSERT(drawBuffer->Name == 0);
- ASSERT(readBuffer->Name == 0);
- newCtx->WinSysDrawBuffer = drawBuffer;
- newCtx->WinSysReadBuffer = readBuffer;
- /* don't replace user-buffer bindings with window system buffer */
- if (!newCtx->DrawBuffer || newCtx->DrawBuffer->Name == 0) {
- newCtx->DrawBuffer = drawBuffer;
- newCtx->ReadBuffer = readBuffer;
- }
-
- newCtx->NewState |= _NEW_BUFFERS;
-
-#if _HAVE_FULL_GL
- if (!drawBuffer->Initialized) {
- /* get initial window size */
- GLuint bufWidth, bufHeight;
- /* ask device driver for size of the buffer */
- (*newCtx->Driver.GetBufferSize)(drawBuffer, &bufWidth, &bufHeight);
- /* set initial buffer size */
- if (newCtx->Driver.ResizeBuffers)
- newCtx->Driver.ResizeBuffers(newCtx, drawBuffer,
- bufWidth, bufHeight);
- drawBuffer->Initialized = GL_TRUE;
- }
-
- if (readBuffer != drawBuffer && !readBuffer->Initialized) {
- /* get initial window size */
- GLuint bufWidth, bufHeight;
- /* ask device driver for size of the buffer */
- (*newCtx->Driver.GetBufferSize)(readBuffer, &bufWidth, &bufHeight);
- /* set initial buffer size */
- if (newCtx->Driver.ResizeBuffers)
- newCtx->Driver.ResizeBuffers(newCtx, readBuffer,
- bufWidth, bufHeight);
- readBuffer->Initialized = GL_TRUE;
- }
-#endif
- if (newCtx->FirstTimeCurrent) {
- /* set initial viewport and scissor size now */
- _mesa_set_viewport(newCtx, 0, 0, drawBuffer->Width, drawBuffer->Height);
- newCtx->Scissor.Width = drawBuffer->Width;
- newCtx->Scissor.Height = drawBuffer->Height;
- }
- }
-
- /* Alert the driver - usually passed on to the sw t&l module,
- * but also used to detect threaded cases in the radeon codegen
- * hw t&l module.
- */
- if (newCtx->Driver.MakeCurrent)
- newCtx->Driver.MakeCurrent( newCtx, drawBuffer, readBuffer );
-
- /* We can use this to help debug user's problems. Tell them to set
- * the MESA_INFO env variable before running their app. Then the
- * first time each context is made current we'll print some useful
- * information.
- */
- if (newCtx->FirstTimeCurrent) {
- if (_mesa_getenv("MESA_INFO")) {
- _mesa_print_info();
- }
- newCtx->FirstTimeCurrent = GL_FALSE;
- }
- }
-}
-
-
-/**
- * Make context 'ctx' share the display lists, textures and programs
- * that are associated with 'ctxToShare'.
- * Any display lists, textures or programs associated with 'ctx' will
- * be deleted if nobody else is sharing them.
- */
-GLboolean
-_mesa_share_state(GLcontext *ctx, GLcontext *ctxToShare)
-{
- if (ctx && ctxToShare && ctx->Shared && ctxToShare->Shared) {
- ctx->Shared->RefCount--;
- if (ctx->Shared->RefCount == 0) {
- free_shared_state(ctx, ctx->Shared);
- }
- ctx->Shared = ctxToShare->Shared;
- ctx->Shared->RefCount++;
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
-}
-
-
-
-/**
- * Get current context for the calling thread.
- *
- * \return pointer to the current GL context.
- *
- * Calls _glapi_get_context(). This isn't the fastest way to get the current
- * context. If you need speed, see the #GET_CURRENT_CONTEXT macro in context.h.
- */
-GLcontext *
-_mesa_get_current_context( void )
-{
- return (GLcontext *) _glapi_get_context();
-}
-
-/**
- * Get context's current API dispatch table.
- *
- * It'll either be the immediate-mode execute dispatcher or the display list
- * compile dispatcher.
- *
- * \param ctx GL context.
- *
- * \return pointer to dispatch_table.
- *
- * Simply returns __GLcontextRec::CurrentDispatch.
- */
-struct _glapi_table *
-_mesa_get_dispatch(GLcontext *ctx)
-{
- return ctx->CurrentDispatch;
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name Miscellaneous functions */
-/**********************************************************************/
-/*@{*/
-
-/**
- * Record an error.
- *
- * \param ctx GL context.
- * \param error error code.
- *
- * Records the given error code and call the driver's dd_function_table::Error
- * function if defined.
- *
- * \sa
- * This is called via _mesa_error().
- */
-void
-_mesa_record_error( GLcontext *ctx, GLenum error )
-{
- if (!ctx)
- return;
-
- if (ctx->ErrorValue == GL_NO_ERROR) {
- ctx->ErrorValue = error;
- }
-
- /* Call device driver's error handler, if any. This is used on the Mac. */
- if (ctx->Driver.Error) {
- (*ctx->Driver.Error)( ctx );
- }
-}
-
-/**
- * Execute glFinish().
- *
- * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
- * dd_function_table::Finish driver callback, if not NULL.
- */
-void GLAPIENTRY
-_mesa_Finish( void )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- if (ctx->Driver.Finish) {
- (*ctx->Driver.Finish)( ctx );
- }
-}
-
-/**
- * Execute glFlush().
- *
- * Calls the #ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH macro and the
- * dd_function_table::Flush driver callback, if not NULL.
- */
-void GLAPIENTRY
-_mesa_Flush( void )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- if (ctx->Driver.Flush) {
- (*ctx->Driver.Flush)( ctx );
- }
-}
-
-
-/*@}*/