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Adds gles2-context renderer constraint

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This adds a new renderer constraint enum:
  COGL_RENDERER_CONSTRAINT_SUPPORTS_GLES2_CONTEXT
that can be used by applications to ensure the renderer they connect to
has support for creating a GLES2 context via cogl_gles2_context_new().

The cogl-gles2-context and cogl-gles2-gears examples and the conformance
tests have been updated to use this constraint.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit ed61463d7194354b26624e8014859f0fbfc06a12)
This commit is contained in:
Robert Bragg 2012-04-26 12:18:56 +01:00
parent 8d0b771cd3
commit 498937083e
9 changed files with 79 additions and 16 deletions
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43
cogl/cogl-renderer.c
View File

@ -241,10 +241,25 @@ _cogl_renderer_choose_driver (CoglRenderer *renderer,
{
const char *driver_name = g_getenv ("COGL_DRIVER");
const char *libgl_name;
CoglBool support_gles2_constraint = FALSE;
GList *l;
if (!driver_name)
driver_name = _cogl_config_driver;
for (l = renderer->constraints; l; l = l->next)
{
CoglRendererConstraint constraint = GPOINTER_TO_UINT (l->data);
if (constraint == COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2)
{
support_gles2_constraint = TRUE;
if (!driver_name && renderer->driver_override == COGL_DRIVER_ANY)
renderer->driver_override = COGL_DRIVER_GLES2;
break;
}
}
#ifdef HAVE_COGL_GL
if (renderer->driver_override == COGL_DRIVER_GL ||
(renderer->driver_override == COGL_DRIVER_ANY &&
@ -286,6 +301,16 @@ _cogl_renderer_choose_driver (CoglRenderer *renderer,
found:
if (support_gles2_constraint &&
renderer->driver != COGL_DRIVER_GLES2)
{
g_set_error (error,
COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"No suitable driver found");
return FALSE;
}
#ifndef HAVE_DIRECTLY_LINKED_GL_LIBRARY
renderer->libgl_module = g_module_open (libgl_name,
@ -312,6 +337,7 @@ cogl_renderer_connect (CoglRenderer *renderer, GError **error)
{
int i;
GString *error_message;
CoglBool constraints_failed = FALSE;
if (renderer->connected)
return TRUE;
@ -328,7 +354,7 @@ cogl_renderer_connect (CoglRenderer *renderer, GError **error)
const CoglWinsysVtable *winsys = _cogl_winsys_vtable_getters[i]();
GError *tmp_error = NULL;
GList *l;
CoglBool constraints_failed = FALSE;
CoglBool skip_due_to_constraints = FALSE;
if (renderer->winsys_id_override != COGL_WINSYS_ID_ANY)
{
@ -350,12 +376,15 @@ cogl_renderer_connect (CoglRenderer *renderer, GError **error)
CoglRendererConstraint constraint = GPOINTER_TO_UINT (l->data);
if (!(winsys->constraints & constraint))
{
constraints_failed = TRUE;
skip_due_to_constraints = TRUE;
break;
}
}
if (constraints_failed)
if (skip_due_to_constraints)
{
constraints_failed |= TRUE;
continue;
}
/* At least temporarily we will associate this winsys with
* the renderer in-case ->renderer_connect calls API that
@ -378,6 +407,14 @@ cogl_renderer_connect (CoglRenderer *renderer, GError **error)
if (!renderer->connected)
{
if (constraints_failed)
{
g_set_error (error, COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"Failed to connected to any renderer due to constraints");
return FALSE;
}
renderer->winsys_vtable = NULL;
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_INIT,

7
cogl/cogl-renderer.h
View File

@ -261,6 +261,10 @@ cogl_renderer_connect (CoglRenderer *renderer, GError **error);
* @COGL_RENDERER_CONSTRAINT_USES_XLIB: Require the renderer to be X11
* based and use Xlib
* @COGL_RENDERER_CONSTRAINT_USES_EGL: Require the renderer to be EGL based
* @COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2: Require that the
* renderer supports creating a #CoglGLES2Context via
* cogl_gles2_context_new(). This can be used to integrate GLES 2.0
* code into Cogl based applications.
*
* These constraint flags are hard-coded features of the different renderer
* backends. Sometimes a platform may support multiple rendering options which
@ -281,7 +285,8 @@ typedef enum
{
COGL_RENDERER_CONSTRAINT_USES_X11 = (1 << 0),
COGL_RENDERER_CONSTRAINT_USES_XLIB = (1 << 1),
COGL_RENDERER_CONSTRAINT_USES_EGL = (1 << 2)
COGL_RENDERER_CONSTRAINT_USES_EGL = (1 << 2),
COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2 = (1 << 3)
} CoglRendererConstraint;

3
cogl/cogl-types.h
View File

@ -737,7 +737,8 @@ typedef enum
typedef enum { /*< prefix=COGL_RENDERER_ERROR >*/
COGL_RENDERER_ERROR_NOT_FOUND,
COGL_RENDERER_ERROR_XLIB_DISPLAY_OPEN
COGL_RENDERER_ERROR_XLIB_DISPLAY_OPEN,
COGL_RENDERER_ERROR_BAD_CONSTRAINT
} CoglRendererError;
/*

3
cogl/winsys/cogl-winsys-egl.c
View File

@ -809,7 +809,8 @@ _cogl_winsys_restore_context (CoglContext *ctx)
static CoglWinsysVtable _cogl_winsys_vtable =
{
.constraints = COGL_RENDERER_CONSTRAINT_USES_EGL,
.constraints = COGL_RENDERER_CONSTRAINT_USES_EGL |
COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2,
/* This winsys is only used as a base for the EGL-platform
winsys's so it does not have an ID or a name */

8
examples/cogl-gles2-context.c
View File

@ -79,8 +79,14 @@ main (int argc, char **argv)
};
GSource *cogl_source;
GMainLoop *loop;
CoglRenderer *renderer;
CoglDisplay *display;
data.ctx = cogl_context_new (NULL, NULL);
renderer = cogl_renderer_new ();
cogl_renderer_add_constraint (renderer,
COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2);
display = cogl_display_new (renderer, NULL);
data.ctx = cogl_context_new (display, NULL);
onscreen = cogl_onscreen_new (data.ctx, 640, 480);
cogl_onscreen_show (onscreen);

8
examples/cogl-gles2-gears.c
View File

@ -758,8 +758,14 @@ main (int argc, char **argv)
GError *error = NULL;
GSource *cogl_source;
GMainLoop *loop;
CoglRenderer *renderer;
CoglDisplay *display;
data.ctx = cogl_context_new (NULL, NULL);
renderer = cogl_renderer_new ();
cogl_renderer_add_constraint (renderer,
COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2);
display = cogl_display_new (renderer, NULL);
data.ctx = cogl_context_new (display, NULL);
onscreen = cogl_onscreen_new (data.ctx, 300, 300);
cogl_onscreen_show (onscreen);

2
tests/conform/test-conform-main.c
View File

@ -99,7 +99,7 @@ main (int argc, char **argv)
UNPORTED_TEST (test_viewport);
ADD_TEST (test_gles2_context, 0);
ADD_TEST (test_gles2_context, TEST_REQUIREMENT_GLES2_CONTEXT);
g_printerr ("Unknown test name \"%s\"\n", argv[1]);

6
tests/conform/test-utils.c
View File

@ -76,6 +76,12 @@ test_utils_init (TestFlags flags)
missing_requirement = TRUE;
}
if (flags & TEST_REQUIREMENT_GLES2_CONTEXT &&
!cogl_has_feature (ctx, COGL_FEATURE_ID_GLES2_CONTEXT))
{
missing_requirement = TRUE;
}
if (flags & TEST_KNOWN_FAILURE)
{
missing_requirement = TRUE;

3
tests/conform/test-utils.h
View File

@ -13,7 +13,8 @@ typedef enum _TestFlags
TEST_REQUIREMENT_GL = 1<<1,
TEST_REQUIREMENT_NPOT = 1<<2,
TEST_REQUIREMENT_TEXTURE_3D = 1<<3,
TEST_REQUIREMENT_POINT_SPRITE = 1<<4
TEST_REQUIREMENT_POINT_SPRITE = 1<<4,
TEST_REQUIREMENT_GLES2_CONTEXT = 1<<5
} TestFlags;
extern CoglContext *ctx;