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scene, render: use Gamma 2.2 TF as default

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This commit is contained in:
Félix Poisot 2025-08-17 15:57:16 +00:00
parent c2d9ae2142
commit d8fb7adcf0
5 changed files with 14 additions and 16 deletions
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5
include/wlr/render/pass.h
View file

@ -31,8 +31,9 @@ struct wlr_render_timer;
struct wlr_buffer_pass_options {
/* Timer to measure the duration of the render pass */
struct wlr_render_timer *timer;
/* Color transform to apply to the output of the render pass,
* leave NULL to indicate sRGB/no custom transform */
/* Color transform to apply to the output of the render pass.
* Leave NULL to indicate the default transform (Gamma 2.2 encoding for
* sRGB monitors) */
struct wlr_color_transform *color_transform;
/** Primaries describing the color volume of the destination buffer */
const struct wlr_color_primaries *primaries;

11
render/vulkan/pass.c
View file

@ -57,10 +57,7 @@ static void convert_pixman_box_to_vk_rect(const pixman_box32_t *box, VkRect2D *r
}
static float color_to_linear(float non_linear) {
// See https://www.w3.org/Graphics/Color/srgb
return (non_linear > 0.04045) ?
pow((non_linear + 0.055) / 1.055, 2.4) :
non_linear / 12.92;
return pow(non_linear, 2.2);
}
static float color_to_linear_premult(float non_linear, float alpha) {
@ -229,7 +226,7 @@ static bool render_pass_submit(struct wlr_render_pass *wlr_pass) {
if (pass->color_transform && pass->color_transform->type != COLOR_TRANSFORM_INVERSE_EOTF) {
pipeline = render_buffer->two_pass.render_setup->output_pipe_lut3d;
} else {
enum wlr_color_transfer_function tf = WLR_COLOR_TRANSFER_FUNCTION_SRGB;
enum wlr_color_transfer_function tf = WLR_COLOR_TRANSFER_FUNCTION_GAMMA22;
if (pass->color_transform && pass->color_transform->type == COLOR_TRANSFORM_INVERSE_EOTF) {
struct wlr_color_transform_inverse_eotf *inverse_eotf =
wlr_color_transform_inverse_eotf_from_base(pass->color_transform);
@ -779,7 +776,7 @@ static void render_pass_add_texture(struct wlr_render_pass *wlr_pass,
enum wlr_color_transfer_function tf = options->transfer_function;
if (tf == 0) {
tf = WLR_COLOR_TRANSFER_FUNCTION_SRGB;
tf = WLR_COLOR_TRANSFER_FUNCTION_GAMMA22;
}
bool srgb_image_view = false;
@ -1186,7 +1183,7 @@ struct wlr_vk_render_pass *vulkan_begin_render_pass(struct wlr_vk_renderer *rend
}
} else {
// This is the default when unspecified
inv_eotf = WLR_COLOR_TRANSFER_FUNCTION_SRGB;
inv_eotf = WLR_COLOR_TRANSFER_FUNCTION_GAMMA22;
}
bool using_linear_pathway = inv_eotf == WLR_COLOR_TRANSFER_FUNCTION_EXT_LINEAR;

8
types/scene/surface.c
View file

@ -37,12 +37,12 @@ static struct wlr_output *get_surface_frame_pacing_output(struct wlr_surface *su
static bool get_tf_preference(enum wlr_color_transfer_function tf) {
switch (tf) {
case WLR_COLOR_TRANSFER_FUNCTION_SRGB:
case WLR_COLOR_TRANSFER_FUNCTION_GAMMA22:
return 0;
case WLR_COLOR_TRANSFER_FUNCTION_ST2084_PQ:
return 1;
case WLR_COLOR_TRANSFER_FUNCTION_SRGB:
case WLR_COLOR_TRANSFER_FUNCTION_EXT_LINEAR:
case WLR_COLOR_TRANSFER_FUNCTION_GAMMA22:
return -1;
}
abort(); // unreachable
@ -61,7 +61,7 @@ static bool get_primaries_preference(enum wlr_color_named_primaries primaries) {
static void get_surface_preferred_image_description(struct wlr_surface *surface,
struct wlr_image_description_v1_data *out) {
struct wlr_output_image_description preferred = {
.transfer_function = WLR_COLOR_TRANSFER_FUNCTION_SRGB,
.transfer_function = WLR_COLOR_TRANSFER_FUNCTION_GAMMA22,
.primaries = WLR_COLOR_NAMED_PRIMARIES_SRGB,
};
@ -249,7 +249,7 @@ static void surface_reconfigure(struct wlr_scene_surface *scene_surface) {
opacity = (float)alpha_modifier_state->multiplier;
}
enum wlr_color_transfer_function tf = WLR_COLOR_TRANSFER_FUNCTION_SRGB;
enum wlr_color_transfer_function tf = WLR_COLOR_TRANSFER_FUNCTION_GAMMA22;
enum wlr_color_named_primaries primaries = WLR_COLOR_NAMED_PRIMARIES_SRGB;
const struct wlr_image_description_v1_data *img_desc =
wlr_surface_get_image_description_v1_data(surface);

2
types/scene/wlr_scene.c
View file

@ -1991,7 +1991,7 @@ static enum scene_direct_scanout_result scene_entry_try_direct_scanout(
return SCANOUT_INELIGIBLE;
}
if (buffer->transfer_function != 0 && buffer->transfer_function != WLR_COLOR_TRANSFER_FUNCTION_SRGB) {
if (buffer->transfer_function != 0 && buffer->transfer_function != WLR_COLOR_TRANSFER_FUNCTION_GAMMA22) {
return SCANOUT_INELIGIBLE;
}
if (buffer->primaries != 0 && buffer->primaries != WLR_COLOR_NAMED_PRIMARIES_SRGB) {

4
types/wlr_color_management_v1.c
View file

@ -212,7 +212,7 @@ static void cm_output_handle_get_image_description(struct wl_client *client,
}
struct wlr_image_description_v1_data data = {
.tf_named = WP_COLOR_MANAGER_V1_TRANSFER_FUNCTION_SRGB,
.tf_named = WP_COLOR_MANAGER_V1_TRANSFER_FUNCTION_GAMMA22,
.primaries_named = WP_COLOR_MANAGER_V1_PRIMARIES_SRGB,
};
const struct wlr_output_image_description *image_desc = cm_output->output->image_description;
@ -777,7 +777,7 @@ static void manager_handle_get_surface_feedback(struct wl_client *client,
surface_feedback->surface = surface;
surface_feedback->data = (struct wlr_image_description_v1_data){
.tf_named = WP_COLOR_MANAGER_V1_TRANSFER_FUNCTION_SRGB,
.tf_named = WP_COLOR_MANAGER_V1_TRANSFER_FUNCTION_GAMMA22,
.primaries_named = WP_COLOR_MANAGER_V1_PRIMARIES_SRGB,
};