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Add a COGL_EXT_IN_GLES3 option to specify extensions that are in GLES3

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Some features that were previously available as an extension in GLES2
are now in core in GLES3 so we should be able to specify that with the
gles_availability mask of COGL_EXT_BEGIN so that GL implementations
advertising GLES3 don't have to additionally advertise the extension
for us to take advantage of it.

Reviewed-by: Robert Bragg <robert.bragg@intel.com>
(cherry picked from commit 4d892cd97558da61ba526f947ac0555ebab632d2)
This commit is contained in:
Neil Roberts 2014-04-01 14:54:38 +01:00
parent f735220a9b
commit eb7c37812a
6 changed files with 102 additions and 42 deletions
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28
cogl/cogl-feature-private.c
View File

@ -53,18 +53,38 @@ _cogl_feature_check (CoglRenderer *renderer,
{
const char *suffix = NULL;
int func_num;
CoglExtGlesAvailability gles_availability = 0;
CoglBool in_core;
switch (driver)
{
case COGL_DRIVER_GLES1:
gles_availability = COGL_EXT_IN_GLES;
break;
case COGL_DRIVER_GLES2:
gles_availability = COGL_EXT_IN_GLES2;
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 3, 0))
gles_availability |= COGL_EXT_IN_GLES3;
break;
case COGL_DRIVER_ANY:
g_assert_not_reached ();
case COGL_DRIVER_WEBGL:
/* FIXME: WebGL should probably have its own COGL_EXT_IN_WEBGL flag */
break;
case COGL_DRIVER_NOP:
case COGL_DRIVER_GL:
case COGL_DRIVER_GL3:
break;
}
/* First check whether the functions should be directly provided by
GL */
if (((driver == COGL_DRIVER_GL ||
driver == COGL_DRIVER_GL3) &&
COGL_CHECK_GL_VERSION (gl_major, gl_minor,
data->min_gl_major, data->min_gl_minor)) ||
(driver == COGL_DRIVER_GLES1 &&
(data->gles_availability & COGL_EXT_IN_GLES)) ||
(driver == COGL_DRIVER_GLES2 &&
(data->gles_availability & COGL_EXT_IN_GLES2)))
(data->gles_availability & gles_availability))
{
suffix = "";
in_core = TRUE;

3
cogl/cogl-feature-private.h
View File

@ -42,7 +42,8 @@
typedef enum
{
COGL_EXT_IN_GLES = (1 << 0),
COGL_EXT_IN_GLES2 = (1 << 1)
COGL_EXT_IN_GLES2 = (1 << 1),
COGL_EXT_IN_GLES3 = (1 << 2)
} CoglExtGlesAvailability;
typedef struct _CoglFeatureFunction CoglFeatureFunction;

11
cogl/driver/gl/cogl-util-gl-private.h
View File

@ -79,4 +79,15 @@ _cogl_gl_util_get_texture_target_string (CoglTextureType texture_type,
const char **target_string_out,
const char **swizzle_out);
/* Parses a GL version number stored in a string. @version_string must
* point to the beginning of the version number (ie, it can't point to
* the "OpenGL ES" part on GLES). The version number can be followed
* by the end of the string, a space or a full stop. Anything else
* will be treated as invalid. Returns TRUE and sets major_out and
* minor_out if it is succesfully parsed or FALSE otherwise. */
CoglBool
_cogl_gl_util_parse_gl_version (const char *version_string,
int *major_out,
int *minor_out);
#endif /* _COGL_UTIL_GL_PRIVATE_H_ */

33
cogl/driver/gl/cogl-util-gl.c
View File

@ -146,3 +146,36 @@ _cogl_gl_util_get_texture_target_string (CoglTextureType texture_type,
if (swizzle_out)
*swizzle_out = tex_coord_swizzle;
}
CoglBool
_cogl_gl_util_parse_gl_version (const char *version_string,
int *major_out,
int *minor_out)
{
const char *major_end, *minor_end;
int major = 0, minor = 0;
/* Extract the major number */
for (major_end = version_string; *major_end >= '0'
&& *major_end <= '9'; major_end++)
major = (major * 10) + *major_end - '0';
/* If there were no digits or the major number isn't followed by a
dot then it is invalid */
if (major_end == version_string || *major_end != '.')
return FALSE;
/* Extract the minor number */
for (minor_end = major_end + 1; *minor_end >= '0'
&& *minor_end <= '9'; minor_end++)
minor = (minor * 10) + *minor_end - '0';
/* If there were no digits or there is an unexpected character then
it is invalid */
if (minor_end == major_end + 1
|| (*minor_end && *minor_end != ' ' && *minor_end != '.'))
return FALSE;
*major_out = major;
*minor_out = minor;
return TRUE;
}

39
cogl/driver/gl/gl/cogl-driver-gl.c
View File

@ -289,39 +289,6 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
return required_format;
}
static CoglBool
parse_gl_version (const char *version_string,
int *major_out,
int *minor_out)
{
const char *major_end, *minor_end;
int major = 0, minor = 0;
/* Extract the major number */
for (major_end = version_string; *major_end >= '0'
&& *major_end <= '9'; major_end++)
major = (major * 10) + *major_end - '0';
/* If there were no digits or the major number isn't followed by a
dot then it is invalid */
if (major_end == version_string || *major_end != '.')
return FALSE;
/* Extract the minor number */
for (minor_end = major_end + 1; *minor_end >= '0'
&& *minor_end <= '9'; minor_end++)
minor = (minor * 10) + *minor_end - '0';
/* If there were no digits or there is an unexpected character then
it is invalid */
if (minor_end == major_end + 1
|| (*minor_end && *minor_end != ' ' && *minor_end != '.'))
return FALSE;
*major_out = major;
*minor_out = minor;
return TRUE;
}
static CoglBool
_cogl_get_gl_version (CoglContext *ctx,
int *major_out,
@ -333,7 +300,7 @@ _cogl_get_gl_version (CoglContext *ctx,
if ((version_string = _cogl_context_get_gl_version (ctx)) == NULL)
return FALSE;
return parse_gl_version (version_string, major_out, minor_out);
return _cogl_gl_util_parse_gl_version (version_string, major_out, minor_out);
}
static CoglBool
@ -444,7 +411,9 @@ _cogl_driver_update_features (CoglContext *ctx,
{
const char *glsl_version =
(char *)ctx->glGetString (GL_SHADING_LANGUAGE_VERSION);
parse_gl_version (glsl_version, &ctx->glsl_major, &ctx->glsl_minor);
_cogl_gl_util_parse_gl_version (glsl_version,
&ctx->glsl_major,
&ctx->glsl_minor);
}
if (COGL_CHECK_GL_VERSION (ctx->glsl_major, ctx->glsl_minor, 1, 2))

30
cogl/driver/gl/gles/cogl-driver-gles.c
View File

@ -219,6 +219,25 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
return required_format;
}
static CoglBool
_cogl_get_gl_version (CoglContext *ctx,
int *major_out,
int *minor_out)
{
const char *version_string;
/* Get the OpenGL version number */
if ((version_string = _cogl_context_get_gl_version (ctx)) == NULL)
return FALSE;
if (!g_str_has_prefix (version_string, "OpenGL ES "))
return FALSE;
return _cogl_gl_util_parse_gl_version (version_string + 10,
major_out,
minor_out);
}
static CoglBool
_cogl_driver_update_features (CoglContext *context,
CoglError **error)
@ -227,6 +246,7 @@ _cogl_driver_update_features (CoglContext *context,
[COGL_FLAGS_N_LONGS_FOR_SIZE (COGL_N_PRIVATE_FEATURES)] = { 0 };
CoglFeatureFlags flags = 0;
char **gl_extensions;
int gl_major, gl_minor;
int i;
/* We have to special case getting the pointer to the glGetString
@ -263,9 +283,15 @@ _cogl_driver_update_features (CoglContext *context,
_cogl_gpu_info_init (context, &context->gpu);
if (!_cogl_get_gl_version (context, &gl_major, &gl_minor))
{
gl_major = 1;
gl_minor = 1;
}
_cogl_feature_check_ext_functions (context,
-1 /* GL major version */,
-1 /* GL minor version */,
gl_major,
gl_minor,
gl_extensions);
#ifdef HAVE_COGL_GLES