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clutter/color-state: Add a way to query if fp16 is needed for storage

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Some color states, currently only the ones with linear transfer
characteristics, need at least half float formats for storing components
of that color state.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3897>
This commit is contained in:
Sebastian Wick 2024-07-18 13:49:46 +02:00 committed by Marge Bot
parent 6a2ce066b0
commit b1370a483e
4 changed files with 48 additions and 5 deletions
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23
clutter/clutter/clutter-color-state.c
View File

@ -893,3 +893,26 @@ clutter_color_state_to_string (ClutterColorState *color_state)
colorspace_name,
transfer_function_name);
}
ClutterEncodingRequiredFormat
clutter_color_state_required_format (ClutterColorState *color_state)
{
ClutterColorStatePrivate *priv;
g_return_val_if_fail (CLUTTER_IS_COLOR_STATE (color_state), FALSE);
priv = clutter_color_state_get_instance_private (color_state);
switch (priv->transfer_function)
{
case CLUTTER_TRANSFER_FUNCTION_LINEAR:
return CLUTTER_ENCODING_REQUIRED_FORMAT_FP16;
case CLUTTER_TRANSFER_FUNCTION_PQ:
return CLUTTER_ENCODING_REQUIRED_FORMAT_UINT10;
case CLUTTER_TRANSFER_FUNCTION_SRGB:
case CLUTTER_TRANSFER_FUNCTION_DEFAULT:
return CLUTTER_ENCODING_REQUIRED_FORMAT_UINT8;
}
g_assert_not_reached ();
}

3
clutter/clutter/clutter-color-state.h
View File

@ -64,4 +64,7 @@ CLUTTER_EXPORT
gboolean clutter_color_state_equals (ClutterColorState *color_state,
ClutterColorState *other_color_state);
CLUTTER_EXPORT
ClutterEncodingRequiredFormat clutter_color_state_required_format (ClutterColorState *color_state);
G_END_DECLS

15
clutter/clutter/clutter-enums.h
View File

@ -1032,6 +1032,21 @@ typedef enum
CLUTTER_TRANSFER_FUNCTION_LINEAR,
} ClutterTransferFunction;
/**
* ClutterEncodingRequiredFormat:
* @CLUTTER_ENCODING_REQUIRED_FORMAT_UINT8: 8bpc uint
* @CLUTTER_ENCODING_REQUIRED_FORMAT_UINT10: 10bpc uint
* @CLUTTER_ENCODING_REQUIRED_FORMAT_FP16: 16bpc floating point
*
* The texture format required to store a specific encoding.
*/
typedef enum
{
CLUTTER_ENCODING_REQUIRED_FORMAT_UINT8 = 0,
CLUTTER_ENCODING_REQUIRED_FORMAT_UINT10 = 1,
CLUTTER_ENCODING_REQUIRED_FORMAT_FP16 = 2,
} ClutterEncodingRequiredFormat;
/**
* ClutterStepMode:
* @CLUTTER_STEP_MODE_START: The change in the value of a

12
src/backends/native/meta-renderer-native.c
View File

@ -1558,8 +1558,14 @@ meta_renderer_native_create_view (MetaRenderer *renderer,
CoglPixelFormat formats[10];
size_t n_formats = 0;
CoglPixelFormat format;
ClutterEncodingRequiredFormat required_format =
clutter_color_state_required_format (view_color_state);
if (view_transfer_function == CLUTTER_TRANSFER_FUNCTION_LINEAR)
if (required_format <= CLUTTER_ENCODING_REQUIRED_FORMAT_UINT8)
{
formats[n_formats++] = cogl_framebuffer_get_internal_format (framebuffer);
}
else
{
formats[n_formats++] = COGL_PIXEL_FORMAT_XRGB_FP_16161616;
formats[n_formats++] = COGL_PIXEL_FORMAT_XBGR_FP_16161616;
@ -1568,10 +1574,6 @@ meta_renderer_native_create_view (MetaRenderer *renderer,
formats[n_formats++] = COGL_PIXEL_FORMAT_ARGB_FP_16161616_PRE;
formats[n_formats++] = COGL_PIXEL_FORMAT_ABGR_FP_16161616_PRE;
}
else
{
formats[n_formats++] = cogl_framebuffer_get_internal_format (framebuffer);
}
if (meta_monitor_transform_is_rotated (view_transform))
{