gstreamer/gst-libs/gst/gl/gstglsl_private.h
Matthew Waters d3f3787d64 glsl: fixup external-oes shaders by mangling the required extension
Newer devices require using a different GLSL extension for accessing
external-oes textures in a shader using the texture() functions.

While the GL_OES_EGL_image_external_essl3 should supposedly be supported
on a any GLES3 android device, the extension was defined after a lot of the
older drivers were built so they will not know about it.  Thus there are two
possible interpretations of which of texture[2D]() should be supported for
external-oes textures.  Strict adherence to the GL_OES_EGL_image_external
extension spec which uses texture2D() or following GLES3's pattern, also
allowing texture() as a function for accessing external-oes textures

This adds another mangling pass to convert
 #extension GL_OES_EGL_image_external : ...
into
 #extension GL_OES_EGL_image_external_essl3 : ...
on GLES3 and when the GL_OES_EGL_image_external_essl3 extension is supported.

Only uses texture() when the GLES3 and the GL_OES_EGL_image_external_essl3
extension is supported for external-oes textures.
Uses GLES2 + texture2D() + GL_OES_EGL_image_external in all other external-oes
cases.

https://bugzilla.gnome.org/show_bug.cgi?id=766993
2016-06-21 21:27:47 +10:00

67 lines
2.4 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_PRIVATE_H__
#define __GST_GLSL_PRIVATE_H__
#include <gst/gl/gstgl_fwd.h>
G_BEGIN_DECLS
#ifndef GL_COMPILE_STATUS
#define GL_COMPILE_STATUS 0x8B81
#endif
#ifndef GLhandleARB
#define GLhandleARB GLuint
#endif
typedef struct _GstGLSLFuncs
{
gboolean initialized;
GLuint GSTGLAPI (*CreateProgram) (void);
void GSTGLAPI (*DeleteProgram) (GLuint program);
void GSTGLAPI (*UseProgram) (GLuint program);
void GSTGLAPI (*GetAttachedShaders) (GLuint program, GLsizei maxcount,
GLsizei * count, GLuint * shaders);
GLuint GSTGLAPI (*CreateShader) (GLenum shaderType);
void GSTGLAPI (*DeleteShader) (GLuint shader);
void GSTGLAPI (*AttachShader) (GLuint program, GLuint shader);
void GSTGLAPI (*DetachShader) (GLuint program, GLuint shader);
void GSTGLAPI (*GetShaderiv) (GLuint program, GLenum pname, GLint * params);
void GSTGLAPI (*GetProgramiv) (GLuint program, GLenum pname, GLint * params);
void GSTGLAPI (*GetShaderInfoLog) (GLuint shader, GLsizei maxLength,
GLsizei * length, char *log);
void GSTGLAPI (*GetProgramInfoLog) (GLuint shader, GLsizei maxLength,
GLsizei * length, char *log);
} GstGLSLFuncs;
G_GNUC_INTERNAL gboolean _gst_glsl_funcs_fill (GstGLSLFuncs * vtable, GstGLContext * context);
G_GNUC_INTERNAL const gchar * _gst_glsl_shader_string_find_version (const gchar * str);
G_GNUC_INTERNAL gchar *
_gst_glsl_mangle_shader (const gchar * str, guint shader_type, GstGLTextureTarget from,
GstGLTextureTarget to, GstGLContext * context, GstGLSLVersion * version, GstGLSLProfile * profile);
G_END_DECLS
#endif /* __GST_GLSL_PRIVATE_H__ */