render/gles: add support for some 16-bpc unsigned shm formats

These formats require EXT_texture_norm16, which in turn needs OpenGL
ES 3.1. The EXT_texture_norm16 extension does not support passing
gl_internalformat = GL_RGBA to glTexImage2D, as can be done for
formats available in OpenGL ES 2.0, so this commit adds a field to
wlr_gles2_pixel_format to provide a more specific internalformat
parameter to glTexImage2D.

1 files changed, 18 insertions, 0 deletions

diff --git a/render/gles2/pixel_format.c b/render/gles2/pixel_format.c
index b155bbbe..acaac5ce 100644
--- a/render/gles2/pixel_format.c
+++ b/render/gles2/pixel_format.c
@@ -93,6 +93,20 @@ static const struct wlr_gles2_pixel_format formats[] = {
 		.gl_type = GL_HALF_FLOAT_OES,
 		.has_alpha = true,
 	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+		.has_alpha = true,
+	},
 #endif
 };
 
@@ -112,6 +126,10 @@ bool is_gles2_pixel_format_supported(const struct wlr_gles2_renderer *renderer,
 			&& !renderer->exts.OES_texture_half_float_linear) {
 		return false;
 	}
+	if (format->gl_type == GL_UNSIGNED_SHORT
+			&& !renderer->exts.EXT_texture_norm16) {
+		return false;
+	}
 	/*
 	 * Note that we don't need to check for GL_EXT_texture_format_BGRA8888
 	 * here, since we've already checked if we have it at renderer creation