diff options
Diffstat (limited to 'src/egl/main/eglcontext.c')
| -rw-r--r-- | src/egl/main/eglcontext.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/egl/main/eglcontext.c b/src/egl/main/eglcontext.c new file mode 100644 index 00000000000..e7d833e24ff --- /dev/null +++ b/src/egl/main/eglcontext.c @@ -0,0 +1,226 @@ +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "eglconfig.h" +#include "eglcontext.h" +#include "egldriver.h" +#include "eglglobals.h" +#include "eglhash.h" +#include "eglsurface.h" + + +/** + * Initialize the given _EGLContext object to defaults. + */ +void +_eglInitContext(_EGLContext *ctx) +{ + /* just init to zer for now */ + memset(ctx, 0, sizeof(_EGLContext)); +} + + +/* + * Assign an EGLContext handle to the _EGLContext object then put it into + * the hash table. + */ +void +_eglSaveContext(_EGLContext *ctx) +{ + assert(ctx); + ctx->Handle = _eglHashGenKey(_eglGlobal.Contexts); + _eglHashInsert(_eglGlobal.Contexts, ctx->Handle, ctx); +} + + +/** + * Remove the given _EGLContext object from the hash table. + */ +void +_eglRemoveContext(_EGLContext *ctx) +{ + _eglHashRemove(_eglGlobal.Contexts, ctx->Handle); +} + + +/** + * Return the _EGLContext object that corresponds to the given + * EGLContext handle. + */ +_EGLContext * +_eglLookupContext(EGLContext ctx) +{ + _EGLContext *c = (_EGLContext *) _eglHashLookup(_eglGlobal.Contexts, ctx); + return c; +} + + +/** + * Return the currently bound _EGLContext object, or NULL. + */ +_EGLContext * +_eglGetCurrentContext(void) +{ + /* XXX this should be per-thread someday */ + return _eglGlobal.CurrentContext; +} + + +/** + * Just a placeholder/demo function. Real driver will never use this! + */ +EGLContext +_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list) +{ + _EGLConfig *conf = _eglLookupConfig(drv, dpy, config); + if (!conf) { + _eglError(EGL_BAD_CONFIG, "eglCreateContext"); + return EGL_NO_CONTEXT; + } + + if (share_list != EGL_NO_CONTEXT) { + _EGLContext *shareCtx = _eglLookupContext(share_list); + if (!shareCtx) { + _eglError(EGL_BAD_CONTEXT, "eglCreateContext(share_list)"); + return EGL_NO_CONTEXT; + } + } + + return EGL_NO_CONTEXT; +} + + +/** + * Default fallback routine - drivers should usually override this. + */ +EGLBoolean +_eglDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext ctx) +{ + _EGLContext *context = _eglLookupContext(ctx); + if (context) { + _eglHashRemove(_eglGlobal.Contexts, ctx); + if (context->IsBound) { + context->DeletePending = EGL_TRUE; + } + else { + free(context); + } + return EGL_TRUE; + } + else { + _eglError(EGL_BAD_CONTEXT, "eglDestroyContext"); + return EGL_TRUE; + } +} + + +EGLBoolean +_eglQueryContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value) +{ + _EGLContext *c = _eglLookupContext(ctx); + + (void) drv; + (void) dpy; + + if (!c) { + _eglError(EGL_BAD_CONTEXT, "eglQueryContext"); + return EGL_FALSE; + } + + switch (attribute) { + case EGL_CONFIG_ID: + *value = GET_CONFIG_ATTRIB(c->Config, EGL_CONFIG_ID); + return EGL_TRUE; + default: + _eglError(EGL_BAD_ATTRIBUTE, "eglQueryContext"); + return EGL_FALSE; + } +} + + +/** + * Drivers will typically call this to do the error checking and + * update the various IsBound and DeletePending flags. + * Then, the driver will do its device-dependent Make-Current stuff. + */ +EGLBoolean +_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d, EGLSurface r, EGLContext context) +{ + _EGLContext *ctx = _eglLookupContext(context); + _EGLSurface *draw = _eglLookupSurface(d); + _EGLSurface *read = _eglLookupSurface(r); + + _EGLContext *oldContext = _eglGetCurrentContext(); + _EGLSurface *oldDrawSurface = _eglGetCurrentSurface(EGL_DRAW); + _EGLSurface *oldReadSurface = _eglGetCurrentSurface(EGL_READ); + + /* error checking */ + if (ctx) { + if (draw == NULL || read == NULL) { + _eglError(EGL_BAD_MATCH, "eglMakeCurrent"); + return EGL_FALSE; + } + if (draw->Config != ctx->Config) { + _eglError(EGL_BAD_MATCH, "eglMakeCurrent"); + return EGL_FALSE; + } + if (read->Config != ctx->Config) { + _eglError(EGL_BAD_MATCH, "eglMakeCurrent"); + return EGL_FALSE; + } + } + + /* + * check if the old context or surfaces need to be deleted + */ + if (oldDrawSurface != NULL) { + oldDrawSurface->IsBound = EGL_FALSE; + if (oldDrawSurface->DeletePending) { + /* make sure we don't try to rebind a deleted surface */ + if (draw == oldDrawSurface || draw == oldReadSurface) { + draw = NULL; + } + /* really delete surface now */ + drv->DestroySurface(drv, dpy, oldDrawSurface->Handle); + } + } + if (oldReadSurface != NULL && oldReadSurface != oldDrawSurface) { + oldReadSurface->IsBound = EGL_FALSE; + if (oldReadSurface->DeletePending) { + /* make sure we don't try to rebind a deleted surface */ + if (read == oldDrawSurface || read == oldReadSurface) { + read = NULL; + } + /* really delete surface now */ + drv->DestroySurface(drv, dpy, oldReadSurface->Handle); + } + } + if (oldContext != NULL) { + oldContext->IsBound = EGL_FALSE; + if (oldContext->DeletePending) { + /* make sure we don't try to rebind a deleted context */ + if (ctx == oldContext) { + ctx = NULL; + } + /* really delete context now */ + drv->DestroyContext(drv, dpy, oldContext->Handle); + } + } + + if (ctx) { + /* check read/draw again, in case we deleted them above */ + if (draw == NULL || read == NULL) { + _eglError(EGL_BAD_MATCH, "eglMakeCurrent"); + return EGL_FALSE; + } + ctx->DrawSurface = draw; + ctx->ReadSurface = read; + ctx->IsBound = EGL_TRUE; + draw->IsBound = EGL_TRUE; + read->IsBound = EGL_TRUE; + } + + _eglGlobal.CurrentContext = ctx; + + return EGL_TRUE; +} |