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glslstage: expose the default shader strings as public

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Add some other simple strings for external-oes textures or transforming
the texture coordinates with a transformation matrix
This commit is contained in:
Matthew Waters 2015-11-10 13:11:37 +11:00 committed by Tim-Philipp Müller
parent 6a75a07815
commit b1ac029b87
5 changed files with 112 additions and 25 deletions
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2
gst-libs/gst/gl/Makefile.am
View file

@ -18,6 +18,7 @@ libgstgl_@GST_API_VERSION@_la_SOURCES = \
gstglfilter.c \
gstglbasefilter.c \
gstglshader.c \
gstglshaderstrings.c \
gstglsl.c \
gstglslstage.c \
gstglcolorconvert.c \
@ -47,6 +48,7 @@ libgstgl_@GST_API_VERSION@include_HEADERS = \
gstglfilter.h \
gstglbasefilter.h \
gstglshader.h \
gstglshaderstrings.h \
gstglsl.h \
gstglslstage.h \
gstglcolorconvert.h \

1
gst-libs/gst/gl/gl.h
View file

@ -37,6 +37,7 @@
#include <gst/gl/gstglwindow.h>
#include <gst/gl/gstglslstage.h>
#include <gst/gl/gstglshader.h>
#include <gst/gl/gstglshaderstrings.h>
#include <gst/gl/gstglcolorconvert.h>
#include <gst/gl/gstglupload.h>
#include <gst/gl/gstgluploadmeta.h>

71
gst-libs/gst/gl/gstglshaderstrings.c Normal file
View file

@ -0,0 +1,71 @@
/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglshaderstrings.h"
/* *INDENT-OFF* */
const gchar *gst_gl_shader_string_vertex_default =
"attribute vec4 a_position;\n"
"attribute vec2 a_texcoord;\n"
"varying vec2 v_texcoord;\n"
"void main()\n"
"{\n"
" gl_Position = a_position;\n"
" v_texcoord = a_texcoord;\n"
"}\n";
const gchar *gst_gl_shader_string_vertex_mat4_texture_transform =
"uniform mat4 u_transformation;\n"
"attribute vec4 a_position;\n"
"attribute vec2 a_texcoord;\n"
"varying vec2 v_texcoord;\n"
"void main()\n"
"{\n"
" gl_Position = a_position;\n"
" v_texcoord = (u_transformation * vec4(a_texcoord, 0, 1)).xy;\n"
"}\n";
const gchar *gst_gl_shader_string_fragment_default =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"void main()\n"
"{\n"
" gl_FragColor = texture2D(tex, v_texcoord);\n"
"}";
const gchar *gst_gl_shader_string_fragment_external_oes_default =
"#extension GL_OES_EGL_image_external : require\n"
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2DExternalOES tex;\n"
"void main()\n"
"{\n"
" gl_FragColor = texture2D(tex, v_texcoord);\n"
"}";
/* *INDENT-ON* */

36
gst-libs/gst/gl/gstglshaderstrings.h Normal file
View file

@ -0,0 +1,36 @@
/*
* 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_GL_SHADER_STRINGS_H__
#define __GST_GL_SHADER_STRINGS_H__
#include <gst/gl/gl.h>
G_BEGIN_DECLS
extern const gchar *gst_gl_shader_string_vertex_default;
extern const gchar *gst_gl_shader_string_fragment_default;
extern const gchar *gst_gl_shader_string_vertex_mat4_texture_transform;
extern const gchar *gst_gl_shader_string_fragment_external_oes_default;
G_END_DECLS
#endif /* __GST_GL_SHADER_STRINGS_H__ */

27
gst-libs/gst/gl/gstglslstage.c
View file

@ -29,29 +29,6 @@
static const gchar *es2_version_header = "#version 100\n";
/* *INDENT-OFF* */
static const gchar *simple_vertex_shader_str_gles2 =
"attribute vec4 a_position;\n"
"attribute vec2 a_texcoord;\n"
"varying vec2 v_texcoord;\n"
"void main()\n"
"{\n"
" gl_Position = a_position;\n"
" v_texcoord = a_texcoord;\n"
"}\n";
static const gchar *simple_fragment_shader_str_gles2 =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"void main()\n"
"{\n"
" gl_FragColor = texture2D(tex, v_texcoord);\n"
"}";
/* *INDENT-ON* */
GST_DEBUG_CATEGORY_STATIC (gst_glsl_stage_debug);
#define GST_CAT_DEFAULT gst_glsl_stage_debug
@ -279,7 +256,7 @@ gst_glsl_stage_new_default_vertex (GstGLContext * context)
return gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
simple_vertex_shader_str_gles2);
gst_gl_shader_string_vertex_default);
}
/**
@ -294,7 +271,7 @@ gst_glsl_stage_new_default_fragment (GstGLContext * context)
return gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
simple_fragment_shader_str_gles2);
gst_gl_shader_string_fragment_default);
}
/**