+/**************************************************************************
+ *
+ * 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>
#include "eglcurrent.h"
#include "eglsurface.h"
#include "egllog.h"
+#include "util/macros.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 *disp,
+ 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 &&
+ (!disp->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 (!disp->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 (!disp->Extensions.KHR_create_context) {
err = EGL_BAD_ATTRIBUTE;
break;
}
- if (val != 1 && val != 2) {
+
+ /* 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;
}
- ctx->ClientVersion = val;
+
+ /* 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."
+ *
+ * Note: since the forward-compatible flag can be set more than one way,
+ * the OpenGL version check is performed once, below.
+ */
+ if ((val & EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR) &&
+ api != EGL_OPENGL_API) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if ((val & EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR) &&
+ api != EGL_OPENGL_API) {
+ /* The EGL_KHR_create_context spec says:
+ *
+ * 10) Which error should be generated if robust buffer access
+ * or reset notifications are requested under OpenGL ES?
+ *
+ * As per Issue 6, this extension does not support creating
+ * robust contexts for OpenGL ES. This is only supported via
+ * the EGL_EXT_create_context_robustness extension.
+ *
+ * Attempting to use this extension to create robust OpenGL
+ * ES context will generate an EGL_BAD_ATTRIBUTE error. This
+ * specific error is generated because this extension does
+ * not define the EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR
+ * and EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR
+ * bits for OpenGL ES contexts. Thus, use of these bits fall
+ * under condition described by: "If an attribute is
+ * specified that is not meaningful for the client API
+ * type.." in the above specification.
+ *
+ * The spec requires that we emit the error even if the display
+ * supports EGL_EXT_create_context_robustness. To create a robust
+ * GLES context, the *attribute*
+ * EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT must be used, not the
+ * *flag* EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR.
+ */
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ ctx->Flags |= val;
break;
+
+ case EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR:
+ if (!disp->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."
+ *
+ * EGL 1.5 defines EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY
+ * (without a suffix) which has the same value as the KHR token,
+ * and specifies that it now works with both GL and ES contexts:
+ *
+ * "This attribute is supported only for OpenGL and OpenGL ES
+ * contexts."
+ */
+ if (!(disp->Extensions.KHR_create_context && api == EGL_OPENGL_API)
+ && !(disp->Version >= 15 && (api == EGL_OPENGL_API ||
+ api == EGL_OPENGL_ES_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 (!disp->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 (!disp->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 (disp->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 (disp->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 (disp->Version < 15) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ if (val == EGL_TRUE)
+ ctx->Flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
+ break;
+
+ case EGL_CONTEXT_OPENGL_NO_ERROR_KHR:
+ if (disp->Version < 14 ||
+ !disp->Extensions.KHR_create_context_no_error) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ /* The KHR_no_error spec only applies against OpenGL 2.0+ and
+ * OpenGL ES 2.0+
+ */
+ if ((api != EGL_OPENGL_API && api != EGL_OPENGL_ES_API) ||
+ ctx->ClientMajorVersion < 2) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ /* Canonicalize value to EGL_TRUE/EGL_FALSE definitions */
+ ctx->NoError = !!val;
+ break;
+
+ case EGL_CONTEXT_PRIORITY_LEVEL_IMG:
+ /* The EGL_IMG_context_priority spec says:
+ *
+ * "EGL_CONTEXT_PRIORITY_LEVEL_IMG determines the priority level of
+ * the context to be created. This attribute is a hint, as an
+ * implementation may not support multiple contexts at some
+ * priority levels and system policy may limit access to high
+ * priority contexts to appropriate system privilege level. The
+ * default value for EGL_CONTEXT_PRIORITY_LEVEL_IMG is
+ * EGL_CONTEXT_PRIORITY_MEDIUM_IMG."
+ */
+ {
+ int bit;
+
+ switch (val) {
+ case EGL_CONTEXT_PRIORITY_HIGH_IMG:
+ bit = __EGL_CONTEXT_PRIORITY_HIGH_BIT;
+ break;
+ case EGL_CONTEXT_PRIORITY_MEDIUM_IMG:
+ bit = __EGL_CONTEXT_PRIORITY_MEDIUM_BIT;
+ break;
+ case EGL_CONTEXT_PRIORITY_LOW_IMG:
+ bit = __EGL_CONTEXT_PRIORITY_LOW_BIT;
+ break;
+ default:
+ bit = -1;
+ break;
+ }
+
+ if (bit < 0) {
+ err = EGL_BAD_ATTRIBUTE;
+ break;
+ }
+
+ /* "This extension allows an EGLContext to be created with a
+ * priority hint. It is possible that an implementation will not
+ * honour the hint, especially if there are constraints on the
+ * number of high priority contexts available in the system, or
+ * system policy limits access to high priority contexts to
+ * appropriate system privilege level. A query is provided to find
+ * the real priority level assigned to the context after creation."
+ *
+ * We currently assume that the driver applies the priority hint
+ * and filters out any it cannot handle during the screen setup,
+ * e.g. dri2_setup_screen(). As such we can mask any change that
+ * the driver would fail, and ctx->ContextPriority matches the
+ * hint applied to the driver/hardware backend.
+ */
+ if (disp->Extensions.IMG_context_priority & (1 << bit))
+ ctx->ContextPriority = val;
+
+ break;
+ }
+
+ case EGL_CONTEXT_RELEASE_BEHAVIOR_KHR:
+ if (val == EGL_CONTEXT_RELEASE_BEHAVIOR_NONE_KHR ||
+ val == EGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_KHR) {
+ ctx->ReleaseBehavior = val;
+ } else {
+ err = EGL_BAD_ATTRIBUTE;
+ }
+ break;
+
default:
err = EGL_BAD_ATTRIBUTE;
break;
}
}
- if (err == EGL_SUCCESS) {
- EGLint renderable_type, api_bit;
+ 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;
- renderable_type = GET_CONFIG_ATTRIB(ctx->Config, EGL_RENDERABLE_TYPE);
- api_bit = _eglGetContextAPIBit(ctx);
- if (!(renderable_type & api_bit))
- err = EGL_BAD_CONFIG;
+ 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;
+ }
+
+ /* The EGL_KHR_create_context_no_error spec says:
+ *
+ * "BAD_MATCH is generated if the EGL_CONTEXT_OPENGL_NO_ERROR_KHR is TRUE at
+ * the same time as a debug or robustness context is specified."
+ */
+ if (ctx->NoError && (ctx->Flags & EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR ||
+ ctx->Flags & EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR)) {
+ err = EGL_BAD_MATCH;
+ }
+
+ 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;
/**
* Initialize the given _EGLContext object to defaults and/or the values
* in the attrib_list.
+ *
+ * According to EGL 1.5 Section 3.7:
+ *
+ * "EGL_OPENGL_API and EGL_OPENGL_ES_API are interchangeable for all
+ * purposes except eglCreateContext."
+ *
+ * And since we only support GL and GLES, this is the only place where the
+ * bound API matters at all. We look up the current API from the current
+ * thread, and stash that in the context we're initializing. Our caller is
+ * responsible for determining whether that's an API it supports.
*/
EGLBoolean
-_eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy, _EGLConfig *conf,
+_eglInitContext(_EGLContext *ctx, _EGLDisplay *disp, _EGLConfig *conf,
const EGLint *attrib_list)
{
const EGLenum api = eglQueryAPI();
EGLint err;
- if (api == EGL_NONE) {
- _eglError(EGL_BAD_MATCH, "eglCreateContext(no client API)");
- return EGL_FALSE;
- }
+ if (api == EGL_NONE)
+ return _eglError(EGL_BAD_MATCH, "eglCreateContext(no client API)");
- memset(ctx, 0, sizeof(_EGLContext));
- ctx->Resource.Display = dpy;
+ _eglInitResource(&ctx->Resource, sizeof(*ctx), disp);
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->ResetNotificationStrategy = EGL_NO_RESET_NOTIFICATION_KHR;
+ ctx->ContextPriority = EGL_CONTEXT_PRIORITY_MEDIUM_IMG;
+ ctx->ReleaseBehavior = EGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_KHR;
- err = _eglParseContextAttribList(ctx, attrib_list);
+ err = _eglParseContextAttribList(ctx, disp, 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)
{
_EGLSurface *surf = ctx->DrawSurface;
- EGLint rb;
+ /* From the EGL 1.5 spec:
+ *
+ * - If the context is not bound to a surface, then EGL_NONE will be
+ * returned.
+ */
if (!surf)
return EGL_NONE;
- if (surf->Type == EGL_WINDOW_BIT && ctx->WindowRenderBuffer != EGL_NONE)
- rb = ctx->WindowRenderBuffer;
- else
- rb = surf->RenderBuffer;
- return rb;
+
+ switch (surf->Type) {
+ default:
+ unreachable("bad EGLSurface type");
+ case EGL_PIXMAP_BIT:
+ /* - If the context is bound to a pixmap surface, then EGL_SINGLE_BUFFER
+ * will be returned.
+ */
+ return EGL_SINGLE_BUFFER;
+ case EGL_PBUFFER_BIT:
+ /* - If the context is bound to a pbuffer surface, then EGL_BACK_BUFFER
+ * will be returned.
+ */
+ return EGL_BACK_BUFFER;
+ case EGL_WINDOW_BIT:
+ /* - If the context is bound to a window surface, then either
+ * EGL_BACK_BUFFER or EGL_SINGLE_BUFFER may be returned. The value
+ * returned depends on both the buffer requested by the setting of the
+ * EGL_RENDER_BUFFER property of the surface [...], and on the client
+ * API (not all client APIs support single-buffer Rendering to window
+ * surfaces). Some client APIs allow control of whether rendering goes
+ * to the front or back buffer. This client API-specific choice is not
+ * reflected in the returned value, which only describes the buffer
+ * that will be rendered to by default if not overridden by the client
+ * API.
+ */
+ return surf->ActiveRenderBuffer;
+ }
}
-#endif /* EGL_VERSION_1_2 */
EGLBoolean
-_eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *c,
- EGLint attribute, EGLint *value)
+_eglQueryContext(_EGLContext *c, EGLint attribute, EGLint *value)
{
- (void) drv;
- (void) dpy;
-
if (!value)
return _eglError(EGL_BAD_PARAMETER, "eglQueryContext");
switch (attribute) {
case EGL_CONFIG_ID:
- *value = GET_CONFIG_ATTRIB(c->Config, EGL_CONFIG_ID);
+ /*
+ * From EGL_KHR_no_config_context:
+ *
+ * "Querying EGL_CONFIG_ID returns the ID of the EGLConfig with
+ * respect to which the context was created, or zero if created
+ * without respect to an EGLConfig."
+ */
+ *value = c->Config ? c->Config->ConfigID : 0;
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 */
+ case EGL_CONTEXT_PRIORITY_LEVEL_IMG:
+ *value = c->ContextPriority;
+ break;
default:
return _eglError(EGL_BAD_ATTRIBUTE, "eglQueryContext");
}
}
-/**
- * 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.
- */
- oldCtx = newDraw->CurrentContext;
- if (newCtx != oldCtx) {
- if (oldCtx) {
- assert(oldCtx->DrawSurface == newDraw);
- oldCtx->DrawSurface = NULL;
- }
-
- if (newCtx) {
- _EGLSurface *oldDraw = newCtx->DrawSurface;
- if (oldDraw)
- oldDraw->CurrentContext = NULL;
-
- newCtx->DrawSurface = newDraw;
- *draw = oldDraw;
- }
-
- newDraw->CurrentContext = newCtx;
- }
-
- /* likewise */
- if (newRead != newDraw)
- oldCtx = newRead->CurrentContext;
- if (newCtx != oldCtx) {
- if (oldCtx) {
- assert(oldCtx->ReadSurface == newRead);
- oldCtx->ReadSurface = NULL;
- }
-
- if (newCtx) {
- _EGLSurface *oldRead = newCtx->ReadSurface;
- if (oldRead)
- oldRead->CurrentContext = NULL;
-
- newCtx->ReadSurface = newRead;
- *read = oldRead;
- }
-
- newRead->CurrentContext = newCtx;
- }
-}
-
-
/**
* Bind the context to the thread and return the previous context.
*
* Note that the context may be NULL.
*/
-static _EGLContext *
+_EGLContext *
_eglBindContextToThread(_EGLContext *ctx, _EGLThreadInfo *t)
{
- EGLint apiIndex;
_EGLContext *oldCtx;
- apiIndex = (ctx) ?
- _eglConvertApiToIndex(ctx->ClientAPI) : t->CurrentAPIIndex;
-
- oldCtx = t->CurrentContexts[apiIndex];
+ oldCtx = t->CurrentContext;
if (ctx != oldCtx) {
if (oldCtx)
oldCtx->Binding = NULL;
if (ctx)
ctx->Binding = t;
- t->CurrentContexts[apiIndex] = ctx;
+ t->CurrentContext = ctx;
}
return oldCtx;
_eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
- EGLint conflict_api;
+ _EGLDisplay *disp;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
return EGL_TRUE;
}
- /* ctx/draw/read must be all given */
- if (draw == NULL || read == NULL)
+ disp = ctx->Resource.Display;
+ if (!disp->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->CurrentContext && draw->CurrentContext != ctx) ||
- (read->CurrentContext && read->CurrentContext != ctx))
+ if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
-
- /* simply require the configs to be equal */
- if (draw->Config != ctx->Config || read->Config != ctx->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;
- break;
- case EGL_OPENGL_API:
- conflict_api = EGL_OPENGL_ES_API;
- break;
-#endif
- default:
- conflict_api = -1;
- break;
+ if (draw && draw->CurrentContext && draw->CurrentContext != ctx) {
+ if (draw->CurrentContext->Binding != t)
+ return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+ }
+ if (read && read->CurrentContext && read->CurrentContext != ctx) {
+ if (read->CurrentContext->Binding != t)
+ return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
}
- if (conflict_api >= 0 && _eglGetAPIContext(conflict_api))
- return _eglError(EGL_BAD_ACCESS, "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_KHR_no_config_context
+ * extension */
+ assert(disp->Extensions.KHR_no_config_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");
+ }
return EGL_TRUE;
}
/**
* 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;
- assert(*draw && *read);
+ 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