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gl/format: add a function to retrieve if a format is supported

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This commit is contained in:
Matthew Waters 2018-05-05 21:03:25 +10:00
parent c150928756
commit c4367b63d8
3 changed files with 75 additions and 8 deletions
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1
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -4062,6 +4062,7 @@ GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_2D
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_RECTANGLE
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_EXTERNAL_OES
GstGLFormat
gst_gl_format_is_supported
gst_gl_format_type_n_bytes
gst_gl_format_from_video_info
gst_gl_sized_gl_format_from_gl_format_type

78
gst-libs/gst/gl/gstglformat.c
View file

@ -192,22 +192,18 @@ gst_gl_format_from_video_info (GstGLContext * context, GstVideoInfo * vinfo,
switch (n_plane_components) {
case 4:
return GST_GL_RGBA;
break;
case 3:
return GST_GL_RGB;
break;
case 2:
return texture_rg ? GST_GL_RG : GST_GL_LUMINANCE_ALPHA;
break;
case 1:
return texture_rg ? GST_GL_RED : GST_GL_LUMINANCE;
break;
default:
g_assert_not_reached ();
break;
}
return GST_GL_RGBA;
g_critical ("Unknown video format 0x%x provided", v_format);
return 0;
}
/**
@ -276,7 +272,8 @@ gst_gl_sized_gl_format_from_gl_format_type (GstGLContext * context,
case GST_GL_DEPTH24_STENCIL8:
return format;
default:
break;
g_critical ("Unknown GL format 0x%x type 0x%x provided", format, type);
return format;
}
g_assert_not_reached ();
@ -331,11 +328,76 @@ gst_gl_format_type_from_sized_gl_format (GstGLFormat format,
*gl_type = GL_UNSIGNED_BYTE;
break;
default:
g_assert_not_reached ();
g_critical ("Unknown GL format 0x%x provided", format);
*unsized_format = format;
*gl_type = GL_UNSIGNED_BYTE;
return;
}
}
/**
* gst_gl_format_is_supported:
* @context: a #GstGLContext
* @format: the #GstGLFormat to check is supported by @context
*
* Returns: Whether @format is supported by @context based on the OpenGL API,
* version, or available OpenGL extension/s.
*/
gboolean
gst_gl_format_is_supported (GstGLContext * context, GstGLFormat format)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
switch (format) {
case GST_GL_RGBA:
case GST_GL_RGB:
return TRUE;
case GST_GL_LUMINANCE:
case GST_GL_ALPHA:
case GST_GL_LUMINANCE_ALPHA:
/* deprecated/removed in core GL3 contexts */
return USING_OPENGL (context) || USING_GLES2 (context);
case GST_GL_RG:
case GST_GL_RED:
return gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0)
|| gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 0)
|| gst_gl_context_check_feature (context, "GL_EXT_texture_rg")
|| gst_gl_context_check_feature (context, "GL_ARB_texture_rg");
case GST_GL_R8:
case GST_GL_RG8:
return USING_GLES3 (context)
|| gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 0)
|| gst_gl_context_check_feature (context, "GL_ARB_texture_rg");
case GST_GL_RGB8:
case GST_GL_RGBA8:
return (USING_GLES3 (context) && !USING_GLES2 (context))
|| USING_OPENGL (context) || USING_OPENGL3 (context);
case GST_GL_RGB16:
case GST_GL_RGBA16:
return USING_OPENGL (context) || USING_OPENGL3 (context)
|| USING_GLES3 (context);
case GST_GL_RGB565:
return USING_GLES2 (context) || (USING_OPENGL3 (context)
&& gst_gl_context_check_feature (context,
"GL_ARB_ES2_compatibility"));
case GST_GL_DEPTH_COMPONENT16:
return gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 4)
|| USING_GLES2 (context)
|| gst_gl_context_check_feature (context, "GL_ARB_depth_texture")
|| gst_gl_context_check_feature (context, "GL_OES_depth_texture");
case GST_GL_DEPTH24_STENCIL8:
return gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 3, 0)
|| USING_GLES3 (context)
|| gst_gl_context_check_feature (context,
"GL_OES_packed_depth_stencil")
|| gst_gl_context_check_feature (context,
"GL_EXT_packed_depth_stencil");
default:
g_assert_not_reached ();
return FALSE;
}
}
/**
* gst_gl_texture_target_to_string:
* @target: a #GstGLTextureTarget

4
gst-libs/gst/gl/gstglformat.h
View file

@ -136,6 +136,10 @@ void gst_gl_format_type_from_sized_gl_format (GstGLFormat
GstGLFormat * unsized_format,
guint * gl_type);
GST_GL_API
gboolean gst_gl_format_is_supported (GstGLContext * context,
GstGLFormat format);
GST_GL_API
GstGLTextureTarget gst_gl_texture_target_from_string (const gchar * str);
GST_GL_API