diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/main/context.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/main/context.c | 1750 |
1 files changed, 1750 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/main/context.c b/nx-X11/extras/Mesa/src/mesa/main/context.c new file mode 100644 index 000000000..25a3f6a37 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/main/context.c @@ -0,0 +1,1750 @@ +/** + * \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 ); + } +} + + +/*@}*/ |