git subrepo clone https://github.com/HarbourMasters/soh.git

subrepo:
  subdir:   "soh"
  merged:   "ba904bbd0"
upstream:
  origin:   "https://github.com/HarbourMasters/soh.git"
  branch:   "master"
  commit:   "ba904bbd0"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

soh/src/code/z_fbdemo_fade.c

@@ -0,0 +1,127 @@
+#include "global.h"
+#include "vt.h"
+
+#include <string.h>
+
+static Gfx sRCPSetupFade[] = {
+    gsDPPipeSync(),
+    gsSPClearGeometryMode(G_ZBUFFER | G_SHADE | G_CULL_BOTH | G_FOG | G_LIGHTING | G_TEXTURE_GEN |
+                          G_TEXTURE_GEN_LINEAR | G_LOD | G_SHADING_SMOOTH),
+    gsDPSetOtherMode(G_AD_DISABLE | G_CD_MAGICSQ | G_CK_NONE | G_TC_FILT | G_TF_BILERP | G_TT_NONE | G_TL_TILE |
+                         G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_1PRIMITIVE,
+                     G_AC_NONE | G_ZS_PIXEL | G_RM_CLD_SURF | G_RM_CLD_SURF2),
+    gsDPSetCombineLERP(0, 0, 0, PRIMITIVE, 0, 0, 0, PRIMITIVE, 0, 0, 0, PRIMITIVE, 0, 0, 0, PRIMITIVE),
+    gsSPEndDisplayList(),
+};
+
+void TransitionFade_Start(void* thisx) {
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    switch (this->fadeType) {
+        case 0:
+            break;
+        case 1:
+            this->fadeTimer = 0;
+            this->fadeColor.a = this->fadeDirection != 0 ? 0xFF : 0;
+            break;
+        case 2:
+            this->fadeColor.a = 0;
+            break;
+    }
+    this->isDone = 0;
+}
+
+void* TransitionFade_Init(void* thisx) {
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    memset(this, 0, sizeof(*this));
+    return this;
+}
+
+void TransitionFade_Destroy(void* thisx) {
+}
+
+void TransitionFade_Update(void* thisx, s32 updateRate) {
+    s32 alpha;
+    s16 newAlpha;
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    switch (this->fadeType) {
+        case 0:
+            break;
+        case 1:
+            this->fadeTimer += updateRate;
+            if (this->fadeTimer >= gSaveContext.fadeDuration) {
+                this->fadeTimer = gSaveContext.fadeDuration;
+                this->isDone = 1;
+            }
+            if (!gSaveContext.fadeDuration) {
+                // "Divide by 0! Zero is included in ZCommonGet fade_speed"
+                osSyncPrintf(VT_COL(RED, WHITE) "０除算! ZCommonGet fade_speed に０がはいってる" VT_RST);
+            }
+
+            alpha = (255.0f * this->fadeTimer) / ((void)0, gSaveContext.fadeDuration);
+            this->fadeColor.a = (this->fadeDirection != 0) ? 255 - alpha : alpha;
+            break;
+        case 2:
+            newAlpha = this->fadeColor.a;
+            if (iREG(50) != 0) {
+                if (iREG(50) < 0) {
+                    if (Math_StepToS(&newAlpha, 255, 255)) {
+                        iREG(50) = 150;
+                    }
+                } else {
+                    Math_StepToS(&iREG(50), 20, 60);
+                    if (Math_StepToS(&newAlpha, 0, iREG(50))) {
+                        iREG(50) = 0;
+                        this->isDone = 1;
+                    }
+                }
+            }
+            this->fadeColor.a = newAlpha;
+            break;
+    }
+}
+
+void TransitionFade_Draw(void* thisx, Gfx** gfxP) {
+    TransitionFade* this = (TransitionFade*)thisx;
+    Gfx* gfx;
+    Color_RGBA8_u32* color = &this->fadeColor;
+
+    if (color->a > 0) {
+        gfx = *gfxP;
+        gSPDisplayList(gfx++, sRCPSetupFade);
+        gDPSetPrimColor(gfx++, 0, 0, color->r, color->g, color->b, color->a);
+        gDPFillRectangle(gfx++, 0, 0, gScreenWidth - 1, gScreenHeight - 1);
+        gDPPipeSync(gfx++);
+        *gfxP = gfx;
+    }
+}
+
+s32 TransitionFade_IsDone(void* thisx) {
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    return this->isDone;
+}
+
+void TransitionFade_SetColor(void* thisx, u32 color) {
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    this->fadeColor.rgba = color;
+}
+
+void TransitionFade_SetType(void* thisx, s32 type) {
+    TransitionFade* this = (TransitionFade*)thisx;
+
+    if (type == 1) {
+        this->fadeType = 1;
+        this->fadeDirection = 1;
+    } else if (type == 2) {
+        this->fadeType = 1;
+        this->fadeDirection = 0;
+    } else if (type == 3) {
+        this->fadeType = 2;
+    } else {
+        this->fadeType = 0;
+    }
+}