+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright 2010-2011 LunarG, Inc.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ **************************************************************************/
+
+
#include <assert.h>
#include <stdlib.h>
#include <string.h>
}
}
- if (err == EGL_SUCCESS && ctx->Config) {
- EGLint renderable_type, api_bit;
-
- renderable_type = GET_CONFIG_ATTRIB(ctx->Config, EGL_RENDERABLE_TYPE);
- api_bit = _eglGetContextAPIBit(ctx);
- if (!(renderable_type & api_bit))
- err = EGL_BAD_CONFIG;
- }
-
return err;
}
return EGL_FALSE;
}
- memset(ctx, 0, sizeof(_EGLContext));
- ctx->Resource.Display = dpy;
+ _eglInitResource(&ctx->Resource, sizeof(*ctx), dpy);
ctx->ClientAPI = api;
ctx->Config = conf;
ctx->WindowRenderBuffer = EGL_NONE;
ctx->ClientVersion = 1; /* the default, per EGL spec */
err = _eglParseContextAttribList(ctx, attrib_list);
+ if (err == EGL_SUCCESS && ctx->Config) {
+ EGLint api_bit;
+
+ api_bit = _eglGetContextAPIBit(ctx);
+ if (!(ctx->Config->RenderableType & api_bit)) {
+ _eglLog(_EGL_DEBUG, "context api is 0x%x while config supports 0x%x",
+ api_bit, ctx->Config->RenderableType);
+ err = EGL_BAD_CONFIG;
+ }
+ }
if (err != EGL_SUCCESS)
return _eglError(err, "eglCreateContext");
}
-/**
- * Just a placeholder/demo function. Real driver will never use this!
- */
-_EGLContext *
-_eglCreateContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
- _EGLContext *share_list, const EGLint *attrib_list)
-{
- return NULL;
-}
-
-
-/**
- * Default fallback routine - drivers should usually override this.
- */
-EGLBoolean
-_eglDestroyContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
-{
- if (!_eglIsContextBound(ctx))
- free(ctx);
- return EGL_TRUE;
-}
-
-
#ifdef EGL_VERSION_1_2
static EGLint
_eglQueryContextRenderBuffer(_EGLContext *ctx)
switch (attribute) {
case EGL_CONFIG_ID:
- *value = GET_CONFIG_ATTRIB(c->Config, EGL_CONFIG_ID);
+ if (!c->Config)
+ return _eglError(EGL_BAD_ATTRIBUTE, "eglQueryContext");
+ *value = c->Config->ConfigID;
break;
case EGL_CONTEXT_CLIENT_VERSION:
*value = c->ClientVersion;
}
-/**
- * Bind the context to the surfaces. Return the surfaces that are "orphaned".
- * That is, when the context is not NULL, return the surfaces it previously
- * bound to; when the context is NULL, the same surfaces are returned.
- */
-static void
-_eglBindContextToSurfaces(_EGLContext *newCtx,
- _EGLSurface **draw, _EGLSurface **read)
-{
- _EGLSurface *newDraw = *draw, *newRead = *read;
- _EGLContext *oldCtx;
-
- /*
- * The goal is to bind a newCtx to newDraw. Since newDraw may already have
- * a binding context (oldCtx), and newCtx may already be bound to another
- * surface (oldDraw), the old bindings are broken first and the new one is
- * created.
- */
- if (newDraw) {
- oldCtx = newDraw->CurrentContext;
- if (newCtx != oldCtx) {
- if (oldCtx) {
- assert(oldCtx->DrawSurface == newDraw);
- oldCtx->DrawSurface = NULL;
- }
-
- newDraw->CurrentContext = newCtx;
- }
- }
-
- if (newCtx) {
- _EGLSurface *oldDraw = newCtx->DrawSurface;
- if (oldDraw)
- oldDraw->CurrentContext = NULL;
-
- newCtx->DrawSurface = newDraw;
- *draw = oldDraw;
- }
-
- /* likewise */
- if (newRead && newRead != newDraw) {
- oldCtx = newRead->CurrentContext;
- if (newCtx != oldCtx) {
- if (oldCtx) {
- assert(oldCtx->ReadSurface == newRead);
- oldCtx->ReadSurface = NULL;
- }
-
- newRead->CurrentContext = newCtx;
- }
- }
-
- if (newCtx) {
- _EGLSurface *oldRead = newCtx->ReadSurface;
- if (oldRead)
- oldRead->CurrentContext = NULL;
-
- newCtx->ReadSurface = newRead;
- *read = oldRead;
- }
-
-}
-
-
/**
* Bind the context to the thread and return the previous context.
*
_eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
- _EGLDisplay *dpy = ctx->Resource.Display;
+ _EGLDisplay *dpy;
EGLint conflict_api;
EGLBoolean surfaceless;
return EGL_TRUE;
}
+ dpy = ctx->Resource.Display;
switch (_eglGetContextAPIBit(ctx)) {
case EGL_OPENGL_ES_BIT:
surfaceless = dpy->Extensions.KHR_surfaceless_gles1;
if (!surfaceless && (draw == NULL || read == NULL))
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
- /* context stealing from another thread is not allowed */
- if (ctx->Binding && ctx->Binding != t)
- return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
-
/*
* The spec says
*
* bound to contexts in another thread, an EGL_BAD_ACCESS error is
* generated."
*
- * But it also says
+ * and
*
* "at most one context may be bound to a particular surface at a given
* time"
- *
- * The latter is more restrictive so we can check only the latter case.
*/
- if ((draw && draw->CurrentContext && draw->CurrentContext != ctx) ||
- (read && read->CurrentContext && read->CurrentContext != ctx))
+ if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+ if (draw && draw->CurrentContext && draw->CurrentContext != ctx) {
+ if (draw->CurrentContext->Binding != t ||
+ draw->CurrentContext->ClientAPI != ctx->ClientAPI)
+ return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+ }
+ if (read && read->CurrentContext && read->CurrentContext != ctx) {
+ if (read->CurrentContext->Binding != t ||
+ read->CurrentContext->ClientAPI != ctx->ClientAPI)
+ return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+ }
/* simply require the configs to be equal */
if ((draw && draw->Config != ctx->Config) ||
/**
* Bind the context to the current thread and given surfaces. Return the
- * previously bound context and the surfaces it bound to. Each argument is
- * both input and output.
+ * previous bound context and surfaces. The caller should unreference the
+ * returned context and surfaces.
+ *
+ * Making a second call with the resources returned by the first call
+ * unsurprisingly undoes the first call, except for the resouce reference
+ * counts.
*/
EGLBoolean
-_eglBindContext(_EGLContext **ctx, _EGLSurface **draw, _EGLSurface **read)
+_eglBindContext(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read,
+ _EGLContext **old_ctx,
+ _EGLSurface **old_draw, _EGLSurface **old_read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
- _EGLContext *newCtx = *ctx, *oldCtx;
+ _EGLContext *prev_ctx;
+ _EGLSurface *prev_draw, *prev_read;
- if (!_eglCheckMakeCurrent(newCtx, *draw, *read))
+ if (!_eglCheckMakeCurrent(ctx, draw, read))
return EGL_FALSE;
- /* bind the new context */
- oldCtx = _eglBindContextToThread(newCtx, t);
+ /* increment refcounts before binding */
+ _eglGetContext(ctx);
+ _eglGetSurface(draw);
+ _eglGetSurface(read);
- if (newCtx)
- _eglBindContextToSurfaces(newCtx, draw, read);
+ /* bind the new context */
+ prev_ctx = _eglBindContextToThread(ctx, t);
- /* unbind the old context from its binding surfaces */
- if (oldCtx && oldCtx != newCtx) {
- assert(!*draw && !*read);
+ /* break previous bindings */
+ if (prev_ctx) {
+ prev_draw = prev_ctx->DrawSurface;
+ prev_read = prev_ctx->ReadSurface;
- *draw = oldCtx->DrawSurface;
- *read = oldCtx->ReadSurface;
+ if (prev_draw)
+ prev_draw->CurrentContext = NULL;
+ if (prev_read)
+ prev_read->CurrentContext = NULL;
- _eglBindContextToSurfaces(NULL, draw, read);
+ prev_ctx->DrawSurface = NULL;
+ prev_ctx->ReadSurface = NULL;
+ }
+ else {
+ prev_draw = prev_read = NULL;
}
- *ctx = oldCtx;
- /* draw and read have been updated in _eglBindContextToSurfaces */
-
- return EGL_TRUE;
-}
-
+ /* establish new bindings */
+ if (ctx) {
+ if (draw)
+ draw->CurrentContext = ctx;
+ if (read)
+ read->CurrentContext = ctx;
-/**
- * Just a placeholder/demo function. Drivers should override this.
- */
-EGLBoolean
-_eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *draw,
- _EGLSurface *read, _EGLContext *ctx)
-{
- return EGL_FALSE;
-}
+ ctx->DrawSurface = draw;
+ ctx->ReadSurface = read;
+ }
+ assert(old_ctx && old_draw && old_read);
+ *old_ctx = prev_ctx;
+ *old_draw = prev_draw;
+ *old_read = prev_read;
-/**
- * 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;
+ return EGL_TRUE;
}
projects / mesa.git / blobdiff