Port over CTexture::MangleMipmap from decomp

Runtime/CMemoryCardSys.cpp

@@ -184,7 +184,7 @@ void CMemoryCardSys::CCardFileInfo::LockIconToken(CAssetId iconTxtr, kabufuda::E
 u32 CMemoryCardSys::CCardFileInfo::CalculateBannerDataSize() const {
   u32 ret = 68;
   if (x3c_bannerTex.IsValid()) {
-    if ((*x40_bannerTok)->GetTextureFormat() == ETexelFormat::RGB5A3) {
+    if ((*x40_bannerTok)->GetTexelFormat() == ETexelFormat::RGB5A3) {
       ret = 6212;
     } else {
       ret = 3652;
@@ -193,7 +193,7 @@ u32 CMemoryCardSys::CCardFileInfo::CalculateBannerDataSize() const {
 
   bool paletteTex = false;
   for (const Icon& icon : x50_iconToks) {
-    if (icon.x8_tex->GetTextureFormat() == ETexelFormat::RGB5A3) {
+    if (icon.x8_tex->GetTexelFormat() == ETexelFormat::RGB5A3) {
       ret += 2048;
     } else {
       ret += 1024;
@@ -236,7 +236,7 @@ void CMemoryCardSys::CCardFileInfo::BuildCardBuffer() {
 void CMemoryCardSys::CCardFileInfo::WriteBannerData(COutputStream& out) const {
   if (x3c_bannerTex.IsValid()) {
     const TLockedToken<CTexture>& tex = *x40_bannerTok;
-    const auto format = tex->GetTextureFormat();
+    const auto format = tex->GetTexelFormat();
     const auto* texels = tex->GetConstBitMapData(0);
     if (format == ETexelFormat::RGB5A3) {
       out.Put(texels, 6144);
@@ -252,7 +252,7 @@ void CMemoryCardSys::CCardFileInfo::WriteBannerData(COutputStream& out) const {
 void CMemoryCardSys::CCardFileInfo::WriteIconData(COutputStream& out) const {
   const u8* palette = nullptr;
   for (const Icon& icon : x50_iconToks) {
-    const auto format = icon.x8_tex->GetTextureFormat();
+    const auto format = icon.x8_tex->GetTexelFormat();
     const auto* texels = icon.x8_tex->GetConstBitMapData(0);
     if (format == ETexelFormat::RGB5A3) {
       out.Put(texels, 2048);
@@ -305,7 +305,7 @@ ECardResult CMemoryCardSys::CCardFileInfo::GetStatus(kabufuda::CardStat& stat) c
 
   kabufuda::EImageFormat bannerFmt;
   if (x3c_bannerTex.IsValid()) {
-    if ((*x40_bannerTok)->GetTextureFormat() == ETexelFormat::RGB5A3) {
+    if ((*x40_bannerTok)->GetTexelFormat() == ETexelFormat::RGB5A3) {
       bannerFmt = kabufuda::EImageFormat::RGB5A3;
     } else {
       bannerFmt = kabufuda::EImageFormat::C8;
@@ -317,7 +317,7 @@ ECardResult CMemoryCardSys::CCardFileInfo::GetStatus(kabufuda::CardStat& stat) c
 
   int idx = 0;
   for (const Icon& icon : x50_iconToks) {
-    stat.SetIconFormat(icon.x8_tex->GetTextureFormat() == ETexelFormat::RGB5A3 ? kabufuda::EImageFormat::RGB5A3
+    stat.SetIconFormat(icon.x8_tex->GetTexelFormat() == ETexelFormat::RGB5A3 ? kabufuda::EImageFormat::RGB5A3
                                                                                : kabufuda::EImageFormat::C8,
                        idx);
     stat.SetIconSpeed(icon.x4_speed, idx);

Runtime/Graphics/CTexture.cpp

@@ -3,6 +3,8 @@
 #include "Runtime/CToken.hpp"
 #include "Runtime/Formatting.hpp"
 
+#include "Runtime/CBasics.hpp"
+
 #include <zeus/Math.hpp>
 #include <magic_enum.hpp>
 
@@ -252,7 +254,74 @@ void CTexture::UncountMemory() {
 }
 
 void CTexture::MangleMipmap(u32 mip) {
-  // TODO(phil): Mangle mipmap
+  if (mip >= x8_mips) {
+    return;
+  }
+
+  const uint colors[4] = {
+    0x000000FF,
+    0x0000FF00,
+    0x00FF0000,
+    0x0000FFFF,
+};
+  const uint color = colors[(mip - 1) & 3];
+  ushort rgb565Color = ((color >> 3) & 0x001F) | // B
+                       ((color >> 5) & 0x07E0) | // G
+                       ((color >> 8) & 0xF800);  // R
+  ushort rgb555Color = ((color >> 3) & 0x001F) | // B
+                       ((color >> 6) & 0x03E0) | // G
+                       ((color >> 9) & 0x7C00);  // R
+  ushort rgb4Color = ((color >> 4) & 0x000F) |   // B
+                     ((color >> 8) & 0x00F0) |   // G
+                     ((color >> 12) & 0x0F00);   // R
+
+  int width = GetWidth();
+  int height = GetHeight();
+
+  int offset = 0;
+  for (int i = 0; i < mip; i++) {
+    offset += width * height;
+    width /= 2;
+    height /= 2;
+  }
+
+  switch (GetTexelFormat()) {
+  case ETexelFormat::RGB565: {
+    ushort* ptr = reinterpret_cast< ushort* >(x44_aramToken_x4_buff.get());//mARAMToken.GetMRAMSafe());
+    for (int i = 0; i < width * height; ++i) {
+      ptr[i + offset] = rgb565Color;
+      CBasics::Swap2Bytes(reinterpret_cast<u8*>(&ptr[i + offset]));
+    }
+    break;
+  }
+  case ETexelFormat::CMPR: {
+    ushort* ptr = reinterpret_cast< ushort* >(x44_aramToken_x4_buff.get()) + offset / 4;
+    for (int i = 0; i < width * height / 16; ++i, ptr += 4) {
+      ptr[0] = rgb565Color;
+      CBasics::Swap2Bytes(reinterpret_cast<u8*>(&ptr[0]));
+      ptr[1] = rgb565Color;
+      CBasics::Swap2Bytes(reinterpret_cast<u8*>(&ptr[1]));
+      ptr[2] = 0;
+      ptr[3] = 0;
+    }
+    break;
+  }
+  case ETexelFormat::RGB5A3: {
+    ushort* ptr = reinterpret_cast< ushort* >(x44_aramToken_x4_buff.get());
+    for (int i = 0; i < width * height; ++i) {
+      ushort& val = ptr[i + offset];
+      if (val & 0x8000) {
+        val = rgb555Color | 0x8000;
+      } else {
+        val = (val & 0xF000) | rgb4Color;
+      }
+      CBasics::Swap2Bytes(reinterpret_cast<u8*>(&val));
+    }
+    break;
+  }
+  default:
+    break;
+  }
 }
 
 u32 CTexture::TexelFormatBitsPerPixel(ETexelFormat fmt) {

Runtime/Graphics/CTexture.hpp

@@ -106,7 +106,7 @@ public:
            EBlackKey blackKey = EBlackKey::Zero);
   ~CTexture();
 
-  [[nodiscard]] ETexelFormat GetTextureFormat() const { return x0_fmt; }
+  [[nodiscard]] ETexelFormat GetTexelFormat() const { return x0_fmt; }
   [[nodiscard]] u16 GetWidth() const { return x4_w; }
   [[nodiscard]] u16 GetHeight() const { return x6_h; }
   [[nodiscard]] u8 GetNumberOfMipMaps() const { return x8_mips; }