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arm9/source/material/palettes/core.cpp

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+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "material/palettes/core.h"
+
+#include <cmath>
+
+#include "material/cam/cam.h"
+#include "material/palettes/tones.h"
+
+namespace material_color_utilities {
+
+namespace {
+
+double PrimaryChroma(double chroma, bool is_content) {
+  return is_content ? chroma : fmax(chroma, 48);
+}
+
+double SecondaryChroma(double chroma, bool is_content) {
+  return is_content ? chroma / 3 : 16;
+}
+
+double TertiaryChroma(double chroma, bool is_content) {
+  return is_content ? chroma / 2 : 24;
+}
+
+double NeutralChroma(double chroma, bool is_content) {
+  return is_content ? fmin(chroma / 12, 4) : 4;
+}
+
+double NeutralVariantChroma(double chroma, bool is_content) {
+  return is_content ? fmin(chroma / 6, 8) : 8;
+}
+
+}  // namespace
+
+CorePalette::CorePalette(double hue, double chroma, bool is_content)
+    : primary_(hue, PrimaryChroma(chroma, is_content)),
+      secondary_(hue, SecondaryChroma(chroma, is_content)),
+      tertiary_(hue + 60, TertiaryChroma(chroma, is_content)),
+      neutral_(hue, NeutralChroma(chroma, is_content)),
+      neutral_variant_(hue, NeutralVariantChroma(chroma, is_content)),
+      error_(25, 84) {}
+
+CorePalette CorePalette::Of(double hue, double chroma) {
+  return CorePalette(hue, chroma, false);
+}
+
+CorePalette CorePalette::ContentOf(double hue, double chroma) {
+  return CorePalette(hue, chroma, true);
+}
+
+CorePalette CorePalette::Of(int argb) {
+  Cam cam = CamFromInt(argb);
+  return CorePalette(cam.hue, cam.chroma, false);
+}
+
+CorePalette CorePalette::ContentOf(int argb) {
+  Cam cam = CamFromInt(argb);
+  return CorePalette(cam.hue, cam.chroma, true);
+}
+
+TonalPalette CorePalette::primary() { return primary_; }
+
+TonalPalette CorePalette::secondary() { return secondary_; }
+
+TonalPalette CorePalette::tertiary() { return tertiary_; }
+
+TonalPalette CorePalette::neutral() { return neutral_; }
+
+TonalPalette CorePalette::neutral_variant() { return neutral_variant_; }
+
+TonalPalette CorePalette::error() { return error_; }
+
+}  // namespace material_color_utilities