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Add color channel filter to editor texture previews

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This commit is contained in:
Marc Gilleron 2024-12-07 22:12:05 +00:00
parent 0c763602f9
commit c7a9d64eaf
13 changed files with 582 additions and 38 deletions
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55
editor/plugins/texture_3d_editor_plugin.cpp
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@ -31,6 +31,7 @@
#include "texture_3d_editor_plugin.h"
#include "editor/editor_string_names.h"
#include "editor/plugins/color_channel_selector.h"
#include "editor/themes/editor_scale.h"
#include "scene/gui/label.h"
@ -44,8 +45,29 @@ constexpr const char *texture_3d_shader = R"(
uniform sampler3D tex;
uniform float layer;
uniform vec4 u_channel_factors = vec4(1.0);
vec4 filter_preview_colors(vec4 input_color, vec4 factors) {
// Filter RGB.
vec4 output_color = input_color * vec4(factors.rgb, input_color.a);
// Remove transparency when alpha is not enabled.
output_color.a = mix(1.0, output_color.a, factors.a);
// Switch to opaque grayscale when visualizing only one channel.
float csum = factors.r + factors.g + factors.b + factors.a;
float single = clamp(2.0 - csum, 0.0, 1.0);
for (int i = 0; i < 4; i++) {
float c = input_color[i];
output_color = mix(output_color, vec4(c, c, c, 1.0), factors[i] * single);
}
return output_color;
}
void fragment() {
COLOR = textureLod(tex, vec3(UV, layer), 0.0);
COLOR = filter_preview_colors(COLOR, u_channel_factors);
}
)";
@ -94,6 +116,8 @@ void Texture3DEditor::_update_material(bool p_texture_changed) {
if (p_texture_changed) {
material->set_shader_parameter("tex", texture->get_rid());
}
material->set_shader_parameter("u_channel_factors", channel_selector->get_selected_channel_factors());
}
void Texture3DEditor::_make_shaders() {
@ -138,30 +162,44 @@ void Texture3DEditor::_update_gui() {
layer->set_max(texture->get_depth() - 1);
const String format = Image::get_format_name(texture->get_format());
const Image::Format format = texture->get_format();
const String format_name = Image::get_format_name(format);
if (texture->has_mipmaps()) {
const int mip_count = Image::get_image_required_mipmaps(texture->get_width(), texture->get_height(), texture->get_format());
const int memory = Image::get_image_data_size(texture->get_width(), texture->get_height(), texture->get_format(), true) * texture->get_depth();
const int mip_count = Image::get_image_required_mipmaps(texture->get_width(), texture->get_height(), format);
const int memory = Image::get_image_data_size(texture->get_width(), texture->get_height(), format, true) * texture->get_depth();
info->set_text(vformat(String::utf8("%d×%d×%d %s\n") + TTR("%s Mipmaps") + "\n" + TTR("Memory: %s"),
texture->get_width(),
texture->get_height(),
texture->get_depth(),
format,
format_name,
mip_count,
String::humanize_size(memory)));
} else {
const int memory = Image::get_image_data_size(texture->get_width(), texture->get_height(), texture->get_format(), false) * texture->get_depth();
const int memory = Image::get_image_data_size(texture->get_width(), texture->get_height(), format, false) * texture->get_depth();
info->set_text(vformat(String::utf8("%d×%d×%d %s\n") + TTR("No Mipmaps") + "\n" + TTR("Memory: %s"),
texture->get_width(),
texture->get_height(),
texture->get_depth(),
format,
format_name,
String::humanize_size(memory)));
}
const uint32_t components_mask = Image::get_format_component_mask(format);
if (is_power_of_2(components_mask)) {
// Only one channel available, no point in showing a channel selector.
channel_selector->hide();
} else {
channel_selector->show();
channel_selector->set_available_channels_mask(components_mask);
}
}
void Texture3DEditor::on_selected_channels_changed() {
_update_material(false);
}
void Texture3DEditor::edit(Ref<Texture3D> p_texture) {
@ -215,6 +253,11 @@ Texture3DEditor::Texture3DEditor() {
add_child(layer);
channel_selector = memnew(ColorChannelSelector);
channel_selector->connect("selected_channels_changed", callable_mp(this, &Texture3DEditor::on_selected_channels_changed));
channel_selector->set_anchors_preset(Control::PRESET_TOP_LEFT);
add_child(channel_selector);
info = memnew(Label);
info->add_theme_color_override(SceneStringName(font_color), Color(1, 1, 1));
info->add_theme_color_override("font_shadow_color", Color(0, 0, 0));