gstreamer/gst-libs/gst/gl/gstglsl.h
Matthew Waters 675415bf2e gl: try to use highp precision where supported
The use of mediump as a specifier in GLSL shaders will have limited
resolution and when used as texture coordinates may become inaccurate
over texture sizes of 1024.
2019-02-28 17:26:32 +11:00

169 lines
6 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_GLSL_H__
#define __GST_GLSL_H__
#include <gst/gl/gstgl_fwd.h>
G_BEGIN_DECLS
GST_GL_API
GQuark gst_glsl_error_quark (void);
/**
* GST_GLSL_ERROR:
*
* Error domain for GStreamer's GLSL module. Errors in this domain will be
* from the #GstGLSLError enumeration
*/
#define GST_GLSL_ERROR (gst_glsl_error_quark ())
/**
* GstGLSLError:
* @GST_GLSL_ERROR_COMPILE: Compilation error occured
* @GST_GLSL_ERROR_LINK: Link error occured
* @GST_GLSL_ERROR_PROGRAM: General program error occured
*
* Compilation stage that caused an error
*
* Since: 1.8
*/
typedef enum {
GST_GLSL_ERROR_COMPILE,
GST_GLSL_ERROR_LINK,
GST_GLSL_ERROR_PROGRAM,
} GstGLSLError;
/**
* GstGLSLVersion:
* @GST_GLSL_VERSION_NONE: no version
* @GST_GLSL_VERSION_100: version 100 (only valid for ES)
* @GST_GLSL_VERSION_110: version 110 (only valid for compatibility desktop GL)
* @GST_GLSL_VERSION_120: version 120 (only valid for compatibility desktop GL)
* @GST_GLSL_VERSION_130: version 130 (only valid for compatibility desktop GL)
* @GST_GLSL_VERSION_140: version 140 (only valid for compatibility desktop GL)
* @GST_GLSL_VERSION_150: version 150 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_300: version 300 (only valid for ES)
* @GST_GLSL_VERSION_310: version 310 (only valid for ES)
* @GST_GLSL_VERSION_320: version 320 (only valid for ES)
* @GST_GLSL_VERSION_330: version 330 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_400: version 400 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_410: version 410 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_420: version 420 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_430: version 430 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_440: version 440 (valid for compatibility/core desktop GL)
* @GST_GLSL_VERSION_450: version 450 (valid for compatibility/core desktop GL)
*
* GLSL version list
*
* Since: 1.8
*/
typedef enum
{
GST_GLSL_VERSION_NONE = 0,
GST_GLSL_VERSION_100 = 100, /* ES */
GST_GLSL_VERSION_110 = 110, /* GL */
GST_GLSL_VERSION_120 = 120, /* GL */
GST_GLSL_VERSION_130 = 130, /* GL */
GST_GLSL_VERSION_140 = 140, /* GL */
GST_GLSL_VERSION_150 = 150, /* GL */
GST_GLSL_VERSION_300 = 300, /* ES */
GST_GLSL_VERSION_310 = 310, /* ES */
GST_GLSL_VERSION_320 = 320, /* ES */
GST_GLSL_VERSION_330 = 330, /* GL */
GST_GLSL_VERSION_400 = 400, /* GL */
GST_GLSL_VERSION_410 = 410, /* GL */
GST_GLSL_VERSION_420 = 420, /* GL */
GST_GLSL_VERSION_430 = 430, /* GL */
GST_GLSL_VERSION_440 = 440, /* GL */
GST_GLSL_VERSION_450 = 450, /* GL */
} GstGLSLVersion;
/**
* GstGLSLProfile:
* @GST_GLSL_PROFILE_NONE: no profile supported/available
* @GST_GLSL_PROFILE_ES: OpenGL|ES profile
* @GST_GLSL_PROFILE_CORE: OpenGL core profile
* @GST_GLSL_PROFILE_COMPATIBILITY: OpenGL compatibility profile
* @GST_GLSL_PROFILE_ANY: any OpenGL/OpenGL|ES profile
*
* GLSL profiles
*
* Since: 1.8
*/
/* FIXME: For GST_GLSL_PROFILE_ANY ~0 -> 0xffffffff see
* https://bugzilla.gnome.org/show_bug.cgi?id=732633
*/
typedef enum
{
/* XXX: maybe make GstGLAPI instead */
GST_GLSL_PROFILE_NONE = 0,
GST_GLSL_PROFILE_ES = (1 << 0),
GST_GLSL_PROFILE_CORE = (1 << 1),
GST_GLSL_PROFILE_COMPATIBILITY = (1 << 2),
GST_GLSL_PROFILE_ANY = (gint) (0xffffffff),
} GstGLSLProfile;
GST_GL_API
GstGLSLVersion gst_glsl_version_from_string (const gchar * string);
GST_GL_API
const gchar * gst_glsl_version_to_string (GstGLSLVersion version);
GST_GL_API
GstGLSLProfile gst_glsl_profile_from_string (const gchar * string);
GST_GL_API
const gchar * gst_glsl_profile_to_string (GstGLSLProfile profile);
GST_GL_API
gchar * gst_glsl_version_profile_to_string (GstGLSLVersion version,
GstGLSLProfile profile);
GST_GL_API
gboolean gst_glsl_version_profile_from_string (const gchar * string,
GstGLSLVersion * version_ret,
GstGLSLProfile * profile_ret);
GST_GL_API
gboolean gst_glsl_string_get_version_profile (const gchar *s,
GstGLSLVersion * version,
GstGLSLProfile * profile);
GST_GL_API
GstGLSLVersion gst_gl_version_to_glsl_version (GstGLAPI gl_api, gint maj, gint min);
GST_GL_API
gboolean gst_gl_context_supports_glsl_profile_version (GstGLContext * context,
GstGLSLVersion version,
GstGLSLProfile profile);
GST_GL_API
gboolean gst_gl_context_supports_precision (GstGLContext * context,
GstGLSLVersion version,
GstGLSLProfile profile);
GST_GL_API
gboolean gst_gl_context_supports_precision_highp (GstGLContext * context,
GstGLSLVersion version,
GstGLSLProfile profile);
G_END_DECLS
#endif /* __GST_GLSL_H__ */