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gl/format: add helper for returning the number of components in a GL format

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5109>
This commit is contained in:
Matthew Waters 2023-07-20 20:50:26 +10:00 committed by GStreamer Marge Bot
parent 5bf85e7588
commit a90f6d5d67
3 changed files with 69 additions and 0 deletions
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26
girs/GstGL-1.0.gir
View file

@ -3914,6 +3914,19 @@ See also: gst_gl_filter_render_to_target()</doc>
</parameter>
</parameters>
</function>
<function name="n_components" c:identifier="gst_gl_format_n_components" version="1.24">
<source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.h"/>
<return-value transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">the number of components in a #GstGLFormat</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="gl_format" transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">the #GstGLFormat</doc>
<type name="GLFormat" c:type="GstGLFormat"/>
</parameter>
</parameters>
</function>
<function name="type_from_sized_gl_format" c:identifier="gst_gl_format_type_from_sized_gl_format" version="1.16">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">Get the unsized format and type from @format for usage in glReadPixels,
glTex{Sub}Image*, glTexImage* and similar functions.</doc>
@ -10757,6 +10770,19 @@ The returned #GstGLContext will be shared with a GStreamer created OpenGL contex
</parameter>
</parameters>
</function>
<function name="gl_format_n_components" c:identifier="gst_gl_format_n_components" moved-to="GLFormat.n_components" version="1.24">
<source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.h"/>
<return-value transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">the number of components in a #GstGLFormat</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="gl_format" transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">the #GstGLFormat</doc>
<type name="GLFormat" c:type="GstGLFormat"/>
</parameter>
</parameters>
</function>
<function name="gl_format_type_from_sized_gl_format" c:identifier="gst_gl_format_type_from_sized_gl_format" moved-to="GLFormat.type_from_sized_gl_format" version="1.16">
<doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c">Get the unsized format and type from @format for usage in glReadPixels,
glTex{Sub}Image*, glTexImage* and similar functions.</doc>

41
subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.c
View file

@ -415,6 +415,47 @@ gst_gl_format_type_from_sized_gl_format (GstGLFormat format,
}
}
/**
* gst_gl_format_n_components:
* @gl_format: the #GstGLFormat
*
* Returns: the number of components in a #GstGLFormat
*
* Since: 1.24
*/
guint
gst_gl_format_n_components (GstGLFormat gl_format)
{
switch (gl_format) {
case GST_GL_LUMINANCE:
case GST_GL_ALPHA:
case GST_GL_RED:
case GST_GL_R8:
case GST_GL_DEPTH_COMPONENT16:
case GST_GL_R16:
return 1;
case GST_GL_LUMINANCE_ALPHA:
case GST_GL_RG:
case GST_GL_RG8:
case GST_GL_DEPTH24_STENCIL8:
case GST_GL_RG16:
return 2;
case GST_GL_RGB:
case GST_GL_RGB8:
case GST_GL_RGB565:
case GST_GL_RGB16:
return 3;
case GST_GL_RGBA:
case GST_GL_RGBA8:
case GST_GL_RGBA16:
case GST_GL_RGB10_A2:
return 4;
default:
g_warn_if_reached ();
return 0;
}
}
/**
* gst_gl_format_is_supported:
* @context: a #GstGLContext

2
subprojects/gst-plugins-base/gst-libs/gst/gl/gstglformat.h
View file

@ -154,6 +154,8 @@ void gst_gl_format_type_from_sized_gl_format (GstGLFormat
GST_GL_API
gboolean gst_gl_format_is_supported (GstGLContext * context,
GstGLFormat format);
GST_GL_API
guint gst_gl_format_n_components (GstGLFormat gl_format);
GST_GL_API
GstGLTextureTarget gst_gl_texture_target_from_string (const gchar * str);