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glx: Implement GLX_EXT_no_config_context (v2) 

Only enabled for the DRI backends at the moment. In principle WGL/CGL
could support this - it's sort of implied by GL 3.0 support - but in
practice their implementations back GLX drawables with native drawables
(and not anonymous FBOs), so they would need either a corresponding
window system binding extension or significant implementation work.

v2: Require that the two screen numbers match, per v4 of spec.

Khronos: https://github.com/KhronosGroup/OpenGL-Registry/pull/102
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Adam Jackson 2017-11-14 15:15:03 -05:00
parent f0fffa926a
commit a4c1e29082
6 changed files with 35 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
glx/createcontext.c
View File

@ -93,7 +93,7 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
__GLXcontext *ctx = NULL;
__GLXcontext *shareCtx = NULL;
__GLXscreen *glxScreen;
__GLXconfig *config;
__GLXconfig *config = NULL;
int err;
/* The GLX_ARB_create_context_robustness spec says:
@ -136,8 +136,10 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
if (!validGlxScreen(client, req->screen, &glxScreen, &err))
return __glXError(GLXBadFBConfig);
if (!validGlxFBConfig(client, glxScreen, req->fbconfig, &config, &err))
return __glXError(GLXBadFBConfig);
if (req->fbconfig) {
if (!validGlxFBConfig(client, glxScreen, req->fbconfig, &config, &err))
return __glXError(GLXBadFBConfig);
}
/* Validate the context with which the new context should share resources.
*/
@ -182,6 +184,9 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
break;
case GLX_RENDER_TYPE:
/* Not valid for GLX_EXT_no_config_context */
if (!req->fbconfig)
return BadValue;
render_type = attribs[2 * i + 1];
break;
@ -206,6 +211,15 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
break;
#endif
case GLX_SCREEN:
/* Only valid for GLX_EXT_no_config_context */
if (req->fbconfig)
return BadValue;
/* Must match the value in the request header */
if (attribs[2 * i + 1] != req->screen)
return BadValue;
break;
default:
if (!req->isDirect)
return BadValue;

1
glx/extension_string.c
View File

@ -86,6 +86,7 @@ static const struct extension_info known_glx_extensions[] = {
{ GLX(EXT_framebuffer_sRGB), VER(0,0), N, },
{ GLX(EXT_import_context), VER(0,0), Y, },
{ GLX(EXT_libglvnd), VER(0,0), N, },
{ GLX(EXT_no_config_context), VER(0,0), N, },
{ GLX(EXT_stereo_tree), VER(0,0), N, },
{ GLX(EXT_texture_from_pixmap), VER(0,0), N, },
{ GLX(EXT_visual_info), VER(0,0), Y, },

1
glx/extension_string.h
View File

@ -48,6 +48,7 @@ enum {
EXT_fbconfig_packed_float_bit,
EXT_import_context_bit,
EXT_libglvnd_bit,
EXT_no_config_context_bit,
EXT_stereo_tree_bit,
EXT_texture_from_pixmap_bit,
EXT_visual_info_bit,

6
glx/glxcmds.c
View File

@ -1770,13 +1770,13 @@ DoQueryContext(__GLXclientState * cl, GLXContextID gcId)
sendBuf[0] = GLX_SHARE_CONTEXT_EXT;
sendBuf[1] = (int) (ctx->share_id);
sendBuf[2] = GLX_VISUAL_ID_EXT;
sendBuf[3] = (int) (ctx->config->visualID);
sendBuf[3] = (int) (ctx->config ? ctx->config->visualID : 0);
sendBuf[4] = GLX_SCREEN_EXT;
sendBuf[5] = (int) (ctx->pGlxScreen->pScreen->myNum);
sendBuf[6] = GLX_FBCONFIG_ID;
sendBuf[7] = (int) (ctx->config->fbconfigID);
sendBuf[7] = (int) (ctx->config ? ctx->config->fbconfigID : 0);
sendBuf[8] = GLX_RENDER_TYPE;
sendBuf[9] = (int) (ctx->config->renderType);
sendBuf[9] = (int) (ctx->config ? ctx->config->renderType : GLX_DONT_CARE);
if (client->swapped) {
int length = reply.length;

13
glx/glxdri2.c
View File

@ -441,6 +441,7 @@ create_driver_context(__GLXDRIcontext * context,
int *error)
{
context->driContext = NULL;
const __DRIconfig *driConfig = config ? config->driConfig : NULL;
if (screen->dri2->base.version >= 3) {
uint32_t ctx_attribs[4 * 2];
@ -483,10 +484,8 @@ create_driver_context(__GLXDRIcontext * context,
}
context->driContext =
(*screen->dri2->createContextAttribs)(screen->driScreen,
api,
config->driConfig,
driShare,
(*screen->dri2->createContextAttribs)(screen->driScreen, api,
driConfig, driShare,
num_ctx_attribs / 2,
ctx_attribs,
&dri_err,
@ -522,8 +521,7 @@ create_driver_context(__GLXDRIcontext * context,
}
context->driContext =
(*screen->dri2->createNewContext) (screen->driScreen,
config->driConfig,
(*screen->dri2->createNewContext) (screen->driScreen, driConfig,
driShare, context);
}
@ -831,6 +829,9 @@ initializeExtensions(__GLXscreen * screen)
__glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_copy_sub_buffer");
LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");
__glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_no_config_context");
LogMessage(X_INFO, "AIGLX: enabled GLX_EXT_no_config_context\n");
if (dri->dri2->base.version >= 3) {
__glXEnableExtension(screen->glx_enable_bits,
"GLX_ARB_create_context");

8
glx/glxdriswrast.c
View File

@ -211,6 +211,7 @@ __glXDRIscreenCreateContext(__GLXscreen * baseScreen,
__GLXDRIscreen *screen = (__GLXDRIscreen *) baseScreen;
__GLXDRIcontext *context, *shareContext;
__GLXDRIconfig *config = (__GLXDRIconfig *) glxConfig;
const __DRIconfig *driConfig = config ? config->driConfig : NULL;
const __DRIcoreExtension *core = screen->core;
__DRIcontext *driShare;
@ -240,8 +241,8 @@ __glXDRIscreenCreateContext(__GLXscreen * baseScreen,
context->base.releaseTexImage = __glXDRIreleaseTexImage;
context->driContext =
(*core->createNewContext) (screen->driScreen,
config->driConfig, driShare, context);
(*core->createNewContext) (screen->driScreen, driConfig, driShare,
context);
return &context->base;
}
@ -352,6 +353,9 @@ initializeExtensions(__GLXscreen * screen)
__glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_copy_sub_buffer");
LogMessage(X_INFO, "IGLX: enabled GLX_MESA_copy_sub_buffer\n");
__glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_no_config_context");
LogMessage(X_INFO, "IGLX: enabled GLX_EXT_no_config_context\n");
if (dri->swrast->base.version >= 3) {
__glXEnableExtension(screen->glx_enable_bits,
"GLX_ARB_create_context");