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gl/memory: generate textures with a sized internal format

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Required in order to generate RG and RED textured with GLES3.
This commit is contained in:
Matthew Waters 2014-05-23 10:57:24 +10:00 committed by Tim-Philipp Müller
parent 132a233f7b
commit b3df031908
1 changed files with 57 additions and 1 deletions
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58
gst-libs/gst/gl/gstglmemory.c
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@ -252,6 +252,58 @@ gst_gl_texture_type_from_format (GstGLContext * context,
return GST_VIDEO_GL_TEXTURE_TYPE_RGBA; return GST_VIDEO_GL_TEXTURE_TYPE_RGBA;
} }
static inline GLenum
_sized_gl_format_from_gl_format_type (GLenum format, GLenum type)
{
switch (format) {
case GL_RGBA:
switch (type) {
case GL_UNSIGNED_BYTE:
return GL_RGBA8;
break;
}
break;
case GL_RGB:
switch (type) {
case GL_UNSIGNED_BYTE:
return GL_RGB8;
break;
case GL_UNSIGNED_SHORT_5_6_5:
return GL_RGB565;
break;
}
break;
case GL_RG:
switch (type) {
case GL_UNSIGNED_BYTE:
return GL_RG8;
break;
}
break;
case GL_RED:
switch (type) {
case GL_UNSIGNED_BYTE:
return GL_R8;
break;
}
break;
case GL_LUMINANCE:
return GL_LUMINANCE;
break;
case GL_LUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA;
break;
case GL_ALPHA:
return GL_ALPHA;
break;
default:
break;
}
g_assert_not_reached ();
return 0;
}
static inline guint static inline guint
_get_plane_width (GstVideoInfo * info, guint plane) _get_plane_width (GstVideoInfo * info, guint plane)
{ {
@ -288,14 +340,18 @@ static void
_generate_texture (GstGLContext * context, GenTexture * data) _generate_texture (GstGLContext * context, GenTexture * data)
{ {
const GstGLFuncs *gl = context->gl_vtable; const GstGLFuncs *gl = context->gl_vtable;
GLenum internal_format;
GST_CAT_TRACE (GST_CAT_GL_MEMORY, GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"Generating texture format:%u type:%u dimensions:%ux%u", data->gl_format, "Generating texture format:%u type:%u dimensions:%ux%u", data->gl_format,
data->gl_type, data->width, data->height); data->gl_type, data->width, data->height);
internal_format =
_sized_gl_format_from_gl_format_type (data->gl_format, data->gl_type);
gl->GenTextures (1, &data->result); gl->GenTextures (1, &data->result);
gl->BindTexture (GL_TEXTURE_2D, data->result); gl->BindTexture (GL_TEXTURE_2D, data->result);
gl->TexImage2D (GL_TEXTURE_2D, 0, data->gl_format, data->width, gl->TexImage2D (GL_TEXTURE_2D, 0, internal_format, data->width,
data->height, 0, data->gl_format, data->gl_type, NULL); data->height, 0, data->gl_format, data->gl_type, NULL);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);