citra_qt: Add enhanced texture debugging widgets.

Double-clicking a texture parameter command in the pica command lists will spawn these as a new tab in the pica command list dock area.

src/video_core/debug_utils/debug_utils.cpp

@@ -382,6 +382,18 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
     return { source_ptr[2], source_ptr[1], source_ptr[0], 255 };
 }
 
+TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
+                                          const Regs::TextureFormat& format)
+{
+    TextureInfo info;
+    info.address = config.GetPhysicalAddress();
+    info.width = config.width;
+    info.height = config.height;
+    info.format = format;
+    info.stride = Pica::Regs::BytesPerPixel(info.format) * info.width;
+    return info;
+}
+
 void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data) {
     // NOTE: Permanently enabling this just trashes hard disks for no reason.
     //       Hence, this is currently disabled.

src/video_core/debug_utils/debug_utils.h

@@ -192,10 +192,14 @@ void OnPicaRegWrite(u32 id, u32 value);
 std::unique_ptr<PicaTrace> FinishPicaTracing();
 
 struct TextureInfo {
+    unsigned int address;
     int width;
     int height;
     int stride;
     Pica::Regs::TextureFormat format;
+
+    static TextureInfo FromPicaRegister(const Pica::Regs::TextureConfig& config,
+                                        const Pica::Regs::TextureFormat& format);
 };
 
 const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info);

src/video_core/pica.h

@@ -130,7 +130,20 @@ struct Regs {
         // Seems like they are luminance formats and compressed textures.
     };
 
-    BitField<0, 1, u32> texturing_enable;
+    static unsigned BytesPerPixel(TextureFormat format) {
+        if (format == TextureFormat::RGBA8)
+            return 4;
+        else if (format == TextureFormat::RGB8)
+            return 3;
+        else if (format == TextureFormat::RGBA5551 ||
+                 format == TextureFormat::RGB565 ||
+                 format == TextureFormat::RGBA4)
+            return 2;
+        else // placeholder
+            return 1;
+    }
+
+    BitField< 0, 1, u32> texturing_enable;
     TextureConfig texture0;
     INSERT_PADDING_WORDS(0x8);
     BitField<0, 4, TextureFormat> texture0_format;