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#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 zero 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->API.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->API.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->API.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;
}
/**
* This is defined by the EGL_MESA_copy_context extension.
*/
EGLBoolean
_eglCopyContextMESA(_EGLDriver *drv, EGLDisplay dpy, EGLContext source,
EGLContext dest, EGLint mask)
{
/* This function will always have to be overridden/implemented in the
* device driver. If the driver is based on Mesa, use _mesa_copy_context().
*/
return EGL_FALSE;
}
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