1 From 38221080181229d520522a20bcb1663ca19f7aff Mon Sep 17 00:00:00 2001
2 From: Matthew Waters <matthew@centricular.com>
3 Date: Thu, 31 Mar 2016 19:25:32 +1100
4 Subject: [PATCH 2/3] glshader: add glBindFragDataLocation
6 There are some cases where it's needed for binding in/out variables in shaders.
7 e.g. glsl 150 (gl 3.2) doesn't support the 'layout (location = ?)' specifiers in
8 the shader source so we have to bind them ourselves.
10 Upstream-Status: Backport [1.9.1]
12 gst-libs/gst/gl/glprototypes/shaders.h | 10 ++++++++++
13 gst-libs/gst/gl/gstglshader.c | 20 ++++++++++++++++++++
14 gst-libs/gst/gl/gstglshader.h | 1 +
15 3 files changed, 31 insertions(+)
17 diff --git a/gst-libs/gst/gl/glprototypes/shaders.h b/gst-libs/gst/gl/glprototypes/shaders.h
18 index 817e479..6d828db 100644
19 --- a/gst-libs/gst/gl/glprototypes/shaders.h
20 +++ b/gst-libs/gst/gl/glprototypes/shaders.h
21 @@ -362,3 +362,13 @@ GST_GL_EXT_FUNCTION (void, UniformMatrix3x4fv,
22 GST_GL_EXT_FUNCTION (void, UniformMatrix4x3fv,
23 (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value))
26 +GST_GL_EXT_BEGIN (bind_frag_data,
27 + GST_GL_API_OPENGL | GST_GL_API_OPENGL3,
32 +GST_GL_EXT_FUNCTION (void, BindFragDataLocation,
33 + (GLuint program, GLuint index, const GLchar * name))
35 diff --git a/gst-libs/gst/gl/gstglshader.c b/gst-libs/gst/gl/gstglshader.c
36 index 9d96784..9f09236 100644
37 --- a/gst-libs/gst/gl/gstglshader.c
38 +++ b/gst-libs/gst/gl/gstglshader.c
39 @@ -1306,3 +1306,23 @@ gst_gl_shader_bind_attribute_location (GstGLShader * shader, GLuint index,
41 gl->BindAttribLocation (priv->program_handle, index, name);
45 +gst_gl_shader_bind_frag_data_location (GstGLShader * shader,
46 + guint index, const gchar * name)
48 + GstGLShaderPrivate *priv;
51 + g_return_if_fail (shader != NULL);
52 + if (!_ensure_program (shader))
53 + g_return_if_fail (shader->priv->program_handle);
54 + priv = shader->priv;
55 + gl = shader->context->gl_vtable;
56 + g_return_if_fail (gl->BindFragDataLocation);
58 + GST_TRACE_OBJECT (shader, "binding program %i frag data \'%s\' location %i",
59 + (int) priv->program_handle, name, index);
61 + gl->BindFragDataLocation (priv->program_handle, index, name);
63 diff --git a/gst-libs/gst/gl/gstglshader.h b/gst-libs/gst/gl/gstglshader.h
64 index 21410e2..2200b89 100644
65 --- a/gst-libs/gst/gl/gstglshader.h
66 +++ b/gst-libs/gst/gl/gstglshader.h
67 @@ -104,6 +104,7 @@ void gst_gl_shader_set_uniform_matrix_4x3fv (GstGLShader *shader, const gchar *n
69 gint gst_gl_shader_get_attribute_location (GstGLShader *shader, const gchar *name);
70 void gst_gl_shader_bind_attribute_location (GstGLShader * shader, guint index, const gchar * name);
71 +void gst_gl_shader_bind_frag_data_location (GstGLShader * shader, guint index, const gchar * name);