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render/color: introduce COLOR_TRANSFORM_LUT_3X1D

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This will be useful to apply LUTs applied via wlr_gamma_control_v1,
and to add wlr_color_transform support to wlr_output.
This commit is contained in:
Simon Ser 2025-05-24 11:19:32 +02:00 • committed by Kenny Levinsen
parent 3665b53e29
commit 74217a4d93
4 changed files with 116 additions and 5 deletions
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26
render/vulkan/pass.c
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@ -838,7 +838,7 @@ void vk_color_transform_destroy(struct wlr_addon *addon) {
}
static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
struct wlr_color_transform_lcms2 *tr, size_t dim_len,
struct wlr_color_transform *tr, size_t dim_len,
VkImage *image, VkImageView *image_view,
VkDeviceMemory *memory, VkDescriptorSet *ds,
struct wlr_vk_descriptor_pool **ds_pool) {
@ -851,6 +851,19 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
*ds = VK_NULL_HANDLE;
*ds_pool = NULL;
struct wlr_color_transform_lcms2 *tr_lcms2 = NULL;
struct wlr_color_transform_lut_3x1d *tr_lut_3x1d = NULL;
switch (tr->type) {
case COLOR_TRANSFORM_SRGB:
abort(); // unreachable
case COLOR_TRANSFORM_LCMS2:
tr_lcms2 = color_transform_lcms2_from_base(tr);
break;
case COLOR_TRANSFORM_LUT_3X1D:
tr_lut_3x1d = color_transform_lut_3x1d_from_base(tr);
break;
}
// R32G32B32 is not a required Vulkan format
// TODO: use it when available
VkFormat format = VK_FORMAT_R32G32B32A32_SFLOAT;
@ -948,7 +961,11 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
b_index * sample_range,
};
float rgb_out[3];
color_transform_lcms2_eval(tr, rgb_out, rgb_in);
if (tr_lcms2 != NULL) {
color_transform_lcms2_eval(tr_lcms2, rgb_out, rgb_in);
} else {
color_transform_lut_3x1d_eval(tr_lut_3x1d, rgb_out, rgb_in);
}
dst[dst_offset] = rgb_out[0];
dst[dst_offset + 1] = rgb_out[1];
@ -1018,10 +1035,9 @@ static struct wlr_vk_color_transform *vk_color_transform_create(
return NULL;
}
if (transform->type == COLOR_TRANSFORM_LCMS2) {
if (transform->type != COLOR_TRANSFORM_SRGB) {
vk_transform->lut_3d.dim = 33;
if (!create_3d_lut_image(renderer,
color_transform_lcms2_from_base(transform),
if (!create_3d_lut_image(renderer, transform,
vk_transform->lut_3d.dim,
&vk_transform->lut_3d.image,
&vk_transform->lut_3d.image_view,