+/**************************************************************************
+ *
+ * Copyright 2008 VMware, Inc.
+ * 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>
switch (ctx->ClientAPI) {
case EGL_OPENGL_ES_API:
- switch (ctx->ClientVersion) {
+ switch (ctx->ClientMajorVersion) {
case 1:
bit = EGL_OPENGL_ES_BIT;
break;
case 2:
bit = EGL_OPENGL_ES2_BIT;
break;
+ case 3:
+ bit = EGL_OPENGL_ES3_BIT_KHR;
+ break;
default:
break;
}
* Parse the list of context attributes and return the proper error code.
*/
static EGLint
-_eglParseContextAttribList(_EGLContext *ctx, const EGLint *attrib_list)
+_eglParseContextAttribList(_EGLContext *ctx, _EGLDisplay *dpy,
+ const EGLint *attrib_list)
{
EGLenum api = ctx->ClientAPI;
EGLint i, err = EGL_SUCCESS;
if (!attrib_list)
return EGL_SUCCESS;
+ if (api == EGL_OPENVG_API && attrib_list[0] != EGL_NONE) {
+ _eglLog(_EGL_DEBUG, "bad context attribute 0x%04x", attrib_list[0]);
+ return EGL_BAD_ATTRIBUTE;
+ }
+
for (i = 0; attrib_list[i] != EGL_NONE; i++) {
EGLint attr = attrib_list[i++];
EGLint val = attrib_list[i];
switch (attr) {
case EGL_CONTEXT_CLIENT_VERSION:
- if (api != EGL_OPENGL_ES_API) {
+ /* The EGL 1.4 spec says:
+ *
+ * "attribute EGL_CONTEXT_CLIENT_VERSION is only valid when the
+ * current rendering API is EGL_OPENGL_ES_API"
+ *
+ * The EGL_KHR_create_context spec says:
+ *
+ * "EGL_CONTEXT_MAJOR_VERSION_KHR 0x3098
+ * (this token is an alias for EGL_CONTEXT_CLIENT_VERSION)"
+ *
+ * "The values for attributes EGL_CONTEXT_MAJOR_VERSION_KHR and
+ * EGL_CONTEXT_MINOR_VERSION_KHR specify the requested client API
+ * version. They are only meaningful for OpenGL and OpenGL ES
+ * contexts, and specifying them for other types of contexts will
+ * generate an error."
+ */
+ if ((api != EGL_OPENGL_ES_API &&
+ (!dpy->Extensions.KHR_create_context || api != EGL_OPENGL_API))) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->ClientMajorVersion = val;
+ break;
+
+ case EGL_CONTEXT_MINOR_VERSION_KHR:
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "The values for attributes EGL_CONTEXT_MAJOR_VERSION_KHR and
+ * EGL_CONTEXT_MINOR_VERSION_KHR specify the requested client API
+ * version. They are only meaningful for OpenGL and OpenGL ES
+ * contexts, and specifying them for other types of contexts will
+ * generate an error."
+ */
+ if (!dpy->Extensions.KHR_create_context ||
+ (api != EGL_OPENGL_ES_API && api != EGL_OPENGL_API)) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->ClientMinorVersion = val;
+ break;
+
+ case EGL_CONTEXT_FLAGS_KHR:
+ if (!dpy->Extensions.KHR_create_context) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
+ * EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
+ * [...]
+ * In some cases a debug context may be identical to a non-debug
+ * context. This bit is supported for OpenGL and OpenGL ES
+ * contexts."
+ */
+ if ((val & EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR) &&
+ (api != EGL_OPENGL_API && api != EGL_OPENGL_ES_API)) {
err = EGL_BAD_ATTRIBUTE;
break;
}
- if (val != 1 && val != 2) {
+
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "If the EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR flag bit
+ * is set in EGL_CONTEXT_FLAGS_KHR, then a <forward-compatible>
+ * context will be created. Forward-compatible contexts are
+ * defined only for OpenGL versions 3.0 and later. They must not
+ * support functionality marked as <deprecated> by that version of
+ * the API, while a non-forward-compatible context must support
+ * all functionality in that version, deprecated or not. This bit
+ * is supported for OpenGL contexts, and requesting a
+ * forward-compatible context for OpenGL versions less than 3.0
+ * will generate an error."
+ */
+ if ((val & EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR) &&
+ (api != EGL_OPENGL_API || ctx->ClientMajorVersion < 3)) {
err = EGL_BAD_ATTRIBUTE;
break;
}
- ctx->ClientVersion = val;
+
+ /* The EGL_KHR_create_context_spec says:
+ *
+ * "If the EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR bit is set in
+ * EGL_CONTEXT_FLAGS_KHR, then a context supporting <robust buffer
+ * access> will be created. Robust buffer access is defined in the
+ * GL_ARB_robustness extension specification, and the resulting
+ * context must also support either the GL_ARB_robustness
+ * extension, or a version of OpenGL incorporating equivalent
+ * functionality. This bit is supported for OpenGL contexts.
+ */
+ if ((val & EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR) &&
+ (api != EGL_OPENGL_API ||
+ !dpy->Extensions.EXT_create_context_robustness)) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->Flags |= val;
break;
+
+ case EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR:
+ if (!dpy->Extensions.KHR_create_context) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "[EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR] is only meaningful for
+ * OpenGL contexts, and specifying it for other types of
+ * contexts, including OpenGL ES contexts, will generate an
+ * error."
+ */
+ if (api != EGL_OPENGL_API) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->Profile = val;
+ break;
+
+ case EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR:
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "[EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR] is only
+ * meaningful for OpenGL contexts, and specifying it for other
+ * types of contexts, including OpenGL ES contexts, will generate
+ * an error."
+ */
+ if (!dpy->Extensions.KHR_create_context
+ || api != EGL_OPENGL_API) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->ResetNotificationStrategy = val;
+ break;
+
+ case EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT:
+ /* The EGL_EXT_create_context_robustness spec says:
+ *
+ * "[EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT] is only
+ * meaningful for OpenGL ES contexts, and specifying it for other
+ * types of contexts will generate an EGL_BAD_ATTRIBUTE error."
+ */
+ if (!dpy->Extensions.EXT_create_context_robustness
+ || api != EGL_OPENGL_ES_API) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->ResetNotificationStrategy = val;
+ break;
+
+ case EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT:
+ if (!dpy->Extensions.EXT_create_context_robustness) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if (val == EGL_TRUE)
+ ctx->Flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
+ break;
+
+ case EGL_CONTEXT_OPENGL_ROBUST_ACCESS:
+ if (dpy->Version < 15) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if (val == EGL_TRUE)
+ ctx->Flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
+ break;
+
+ case EGL_CONTEXT_OPENGL_DEBUG:
+ if (dpy->Version < 15) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if (val == EGL_TRUE)
+ ctx->Flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
+ break;
+
+ case EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE:
+ if (dpy->Version < 15) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if (val == EGL_TRUE)
+ ctx->Flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
+ break;
+
default:
err = EGL_BAD_ATTRIBUTE;
break;
}
}
+ if (api == EGL_OPENGL_API) {
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "If the requested OpenGL version is less than 3.2,
+ * EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR is ignored and the
+ * functionality of the context is determined solely by the
+ * requested version."
+ *
+ * Since the value is ignored, only validate the setting if the version
+ * is >= 3.2.
+ */
+ if (ctx->ClientMajorVersion >= 4
+ || (ctx->ClientMajorVersion == 3 && ctx->ClientMinorVersion >= 2)) {
+ switch (ctx->Profile) {
+ case EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR:
+ case EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR:
+ break;
+
+ default:
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "* If an OpenGL context is requested, the requested version
+ * is greater than 3.2, and the value for attribute
+ * EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR has no bits set; has
+ * any bits set other than EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
+ * and EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR; has
+ * more than one of these bits set; or if the implementation does
+ * not support the requested profile, then an EGL_BAD_MATCH error
+ * is generated."
+ */
+ err = EGL_BAD_MATCH;
+ break;
+ }
+ }
+
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "* If an OpenGL context is requested and the values for
+ * attributes EGL_CONTEXT_MAJOR_VERSION_KHR and
+ * EGL_CONTEXT_MINOR_VERSION_KHR, when considered together with
+ * the value for attribute
+ * EGL_CONTEXT_FORWARD_COMPATIBLE_BIT_KHR, specify an OpenGL
+ * version and feature set that are not defined, than an
+ * EGL_BAD_MATCH error is generated.
+ *
+ * ... Thus, examples of invalid combinations of attributes
+ * include:
+ *
+ * - Major version < 1 or > 4
+ * - Major version == 1 and minor version < 0 or > 5
+ * - Major version == 2 and minor version < 0 or > 1
+ * - Major version == 3 and minor version < 0 or > 2
+ * - Major version == 4 and minor version < 0 or > 2
+ * - Forward-compatible flag set and major version < 3"
+ */
+ if (ctx->ClientMajorVersion < 1 || ctx->ClientMinorVersion < 0)
+ err = EGL_BAD_MATCH;
+
+ switch (ctx->ClientMajorVersion) {
+ case 1:
+ if (ctx->ClientMinorVersion > 5
+ || (ctx->Flags & EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR) != 0)
+ err = EGL_BAD_MATCH;
+ break;
+
+ case 2:
+ if (ctx->ClientMinorVersion > 1
+ || (ctx->Flags & EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR) != 0)
+ err = EGL_BAD_MATCH;
+ break;
+
+ case 3:
+ /* Note: The text above is incorrect. There *is* an OpenGL 3.3!
+ */
+ if (ctx->ClientMinorVersion > 3)
+ err = EGL_BAD_MATCH;
+ break;
+
+ case 4:
+ default:
+ /* Don't put additional version checks here. We don't know that
+ * there won't be versions > 4.2.
+ */
+ break;
+ }
+ } else if (api == EGL_OPENGL_ES_API) {
+ /* The EGL_KHR_create_context spec says:
+ *
+ * "* If an OpenGL ES context is requested and the values for
+ * attributes EGL_CONTEXT_MAJOR_VERSION_KHR and
+ * EGL_CONTEXT_MINOR_VERSION_KHR specify an OpenGL ES version that
+ * is not defined, than an EGL_BAD_MATCH error is generated.
+ *
+ * ... Examples of invalid combinations of attributes include:
+ *
+ * - Major version < 1 or > 2
+ * - Major version == 1 and minor version < 0 or > 1
+ * - Major version == 2 and minor version != 0
+ */
+ if (ctx->ClientMajorVersion < 1 || ctx->ClientMinorVersion < 0)
+ err = EGL_BAD_MATCH;
+
+ switch (ctx->ClientMajorVersion) {
+ case 1:
+ if (ctx->ClientMinorVersion > 1)
+ err = EGL_BAD_MATCH;
+ break;
+
+ case 2:
+ if (ctx->ClientMinorVersion > 0)
+ err = EGL_BAD_MATCH;
+ break;
+
+ case 3:
+ /* Don't put additional version checks here. We don't know that
+ * there won't be versions > 3.0.
+ */
+ break;
+
+ default:
+ err = EGL_BAD_MATCH;
+ break;
+ }
+ }
+
+ switch (ctx->ResetNotificationStrategy) {
+ case EGL_NO_RESET_NOTIFICATION_KHR:
+ case EGL_LOSE_CONTEXT_ON_RESET_KHR:
+ break;
+
+ default:
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if ((ctx->Flags & ~(EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR
+ | EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR
+ | EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR)) != 0) {
+ err = EGL_BAD_ATTRIBUTE;
+ }
+
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->Profile = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
- ctx->ClientVersion = 1; /* the default, per EGL spec */
+ ctx->ClientMajorVersion = 1; /* the default, per EGL spec */
+ ctx->ClientMinorVersion = 0;
+ ctx->Flags = 0;
+ ctx->Profile = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
+ ctx->ResetNotificationStrategy = EGL_NO_RESET_NOTIFICATION_KHR;
- err = _eglParseContextAttribList(ctx, attrib_list);
+ err = _eglParseContextAttribList(ctx, dpy, attrib_list);
if (err == EGL_SUCCESS && ctx->Config) {
EGLint api_bit;
}
-/**
- * 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)
{
rb = surf->RenderBuffer;
return rb;
}
-#endif /* EGL_VERSION_1_2 */
EGLBoolean
*value = c->Config->ConfigID;
break;
case EGL_CONTEXT_CLIENT_VERSION:
- *value = c->ClientVersion;
+ *value = c->ClientMajorVersion;
break;
-#ifdef EGL_VERSION_1_2
case EGL_CONTEXT_CLIENT_TYPE:
*value = c->ClientAPI;
break;
case EGL_RENDER_BUFFER:
*value = _eglQueryContextRenderBuffer(c);
break;
-#endif /* EGL_VERSION_1_2 */
default:
return _eglError(EGL_BAD_ATTRIBUTE, "eglQueryContext");
}
_EGLThreadInfo *t = _eglGetCurrentThread();
_EGLDisplay *dpy;
EGLint conflict_api;
- EGLBoolean surfaceless;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
}
dpy = ctx->Resource.Display;
- switch (_eglGetContextAPIBit(ctx)) {
- case EGL_OPENGL_ES_BIT:
- surfaceless = dpy->Extensions.KHR_surfaceless_gles1;
- break;
- case EGL_OPENGL_ES2_BIT:
- surfaceless = dpy->Extensions.KHR_surfaceless_gles2;
- break;
- case EGL_OPENGL_BIT:
- surfaceless = dpy->Extensions.KHR_surfaceless_opengl;
- break;
- default:
- surfaceless = EGL_FALSE;
- break;
- }
-
- if (!surfaceless && (draw == NULL || read == NULL))
+ if (!dpy->Extensions.KHR_surfaceless_context
+ && (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) ||
- (read && read->Config != ctx->Config))
- return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
+ /* If the context has a config then it must match that of the two
+ * surfaces */
+ if (ctx->Config) {
+ if ((draw && draw->Config != ctx->Config) ||
+ (read && read->Config != ctx->Config))
+ return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
+ } else {
+ /* Otherwise we must be using the EGL_MESA_configless_context
+ * extension */
+ assert(dpy->Extensions.MESA_configless_context);
+
+ /* The extension doesn't permit binding draw and read buffers with
+ * differing contexts */
+ if (draw && read && draw->Config != read->Config)
+ return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
+ }
switch (ctx->ClientAPI) {
-#ifdef EGL_VERSION_1_4
/* OpenGL and OpenGL ES are conflicting */
case EGL_OPENGL_ES_API:
conflict_api = EGL_OPENGL_API;
case EGL_OPENGL_API:
conflict_api = EGL_OPENGL_ES_API;
break;
-#endif
default:
conflict_api = -1;
break;
/**
* Bind the context to the current thread and given surfaces. Return the
- * "orphaned" context and surfaces. 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;
- _EGLSurface *newDraw = *draw, *newRead = *read;
+ _EGLContext *prev_ctx;
+ _EGLSurface *prev_draw, *prev_read;
- if (!_eglCheckMakeCurrent(newCtx, newDraw, newRead))
+ if (!_eglCheckMakeCurrent(ctx, draw, read))
return EGL_FALSE;
+ /* increment refcounts before binding */
+ _eglGetContext(ctx);
+ _eglGetSurface(draw);
+ _eglGetSurface(read);
+
/* bind the new context */
- oldCtx = _eglBindContextToThread(newCtx, t);
+ prev_ctx = _eglBindContextToThread(ctx, t);
- /* break old bindings */
- if (oldCtx) {
- *ctx = oldCtx;
- *draw = oldCtx->DrawSurface;
- *read = oldCtx->ReadSurface;
+ /* break previous bindings */
+ if (prev_ctx) {
+ prev_draw = prev_ctx->DrawSurface;
+ prev_read = prev_ctx->ReadSurface;
- if (*draw)
- (*draw)->CurrentContext = NULL;
- if (*read)
- (*read)->CurrentContext = NULL;
+ if (prev_draw)
+ prev_draw->CurrentContext = NULL;
+ if (prev_read)
+ prev_read->CurrentContext = NULL;
- oldCtx->DrawSurface = NULL;
- oldCtx->ReadSurface = NULL;
+ prev_ctx->DrawSurface = NULL;
+ prev_ctx->ReadSurface = NULL;
+ }
+ else {
+ prev_draw = prev_read = NULL;
}
/* establish new bindings */
- if (newCtx) {
- if (newDraw)
- newDraw->CurrentContext = newCtx;
- if (newRead)
- newRead->CurrentContext = newCtx;
-
- newCtx->DrawSurface = newDraw;
- newCtx->ReadSurface = newRead;
+ if (ctx) {
+ if (draw)
+ draw->CurrentContext = ctx;
+ if (read)
+ read->CurrentContext = ctx;
+
+ ctx->DrawSurface = draw;
+ ctx->ReadSurface = read;
}
- /* an old context or surface is not orphaned if it is still bound */
- if (*ctx == newCtx)
- *ctx = NULL;
- if (*draw == newDraw || *draw == newRead)
- *draw = NULL;
- if (*read == newDraw || *read == newRead)
- *read = NULL;
+ assert(old_ctx && old_draw && old_read);
+ *old_ctx = prev_ctx;
+ *old_draw = prev_draw;
+ *old_read = prev_read;
return EGL_TRUE;
}
-
-
-/**
- * Just a placeholder/demo function. Drivers should override this.
- */
-EGLBoolean
-_eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *draw,
- _EGLSurface *read, _EGLContext *ctx)
-{
- return EGL_FALSE;
-}
-
-
-/**
- * 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;
-}
projects / mesa.git / blobdiff