Add support for a ridiculous number of texture formats.

2 files changed, 80 insertions, 7 deletions

diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index 08ecd4cc..1a7b851d 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -418,6 +418,15 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
         return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 3) | (g >> 2), (b << 3) | (b >> 2), disable_alpha ? 255 : (a * 255));
     }
 
+    case Regs::TextureFormat::RGB565:
+    {
+        const u16 source_ptr = *(const u16*)(source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2);
+        u8 r = (source_ptr >> 11) & 0x1F;
+        u8 g = ((source_ptr) >> 5) & 0x3F;
+        u8 b = (source_ptr) & 0x1F;
+        return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2), 255);
+    }
+
     case Regs::TextureFormat::RGBA4:
     {
         const u8* source_ptr = source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2;
@@ -432,6 +441,26 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
         return { r, g, b, disable_alpha ? 255 : a };
     }
 
+    case Regs::TextureFormat::IA8:
+    {
+        const u8* source_ptr = source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2;
+
+        // TODO: Better control this...
+        if (disable_alpha) {
+            return { *source_ptr, *(source_ptr+1), 0, 255 };
+        } else {
+            return { *source_ptr, *source_ptr, *source_ptr, *(source_ptr+1)};
+        }
+    }
+
+    case Regs::TextureFormat::I8:
+    {
+        const u8* source_ptr = source + coarse_x * block_height + coarse_y * info.stride + texel_index_within_tile;
+
+        // TODO: Better control this...
+        return { *source_ptr, *source_ptr, *source_ptr, 255 };
+    }
+
     case Regs::TextureFormat::A8:
     {
         const u8* source_ptr = source + coarse_x * block_height + coarse_y * info.stride + texel_index_within_tile;
@@ -444,6 +473,40 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
         }
     }
 
+    case Regs::TextureFormat::IA4:
+    {
+        const u8* source_ptr = source + coarse_x * block_height / 2 + coarse_y * info.stride + texel_index_within_tile / 2;
+
+        // TODO: Order?
+        u8 i = (*source_ptr)&0xF;
+        u8 a = ((*source_ptr) & 0xF0) >> 4;
+        a |= a << 4;
+        i |= i << 4;
+
+        // TODO: Better control this...
+        if (disable_alpha) {
+            return { i, a, 0, 255 };
+        } else {
+            return { i, i, i, a };
+        }
+    }
+
+    case Regs::TextureFormat::A4:
+    {
+        const u8* source_ptr = source + coarse_x * block_height / 2 + coarse_y * info.stride + texel_index_within_tile / 2;
+
+        // TODO: Order?
+        u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4);
+        a |= a << 4;
+
+        // TODO: Better control this...
+        if (disable_alpha) {
+            return { *source_ptr, *source_ptr, *source_ptr, 255 };
+        } else {
+            return { 0, 0, 0, *source_ptr };
+        }
+    }
+
     default:
         LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format);
         _dbg_assert_(HW_GPU, 0);
@@ -459,7 +522,7 @@ TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
     info.width = config.width;
     info.height = config.height;
     info.format = format;
-    info.stride = Pica::Regs::BytesPerPixel(info.format) * info.width;
+    info.stride = Pica::Regs::NibblesPerPixel(info.format) * info.width / 2;
     return info;
 }
 
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 7d82d733..58361432 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -142,29 +142,39 @@ struct Regs {
         RGBA5551     =  2,
         RGB565       =  3,
         RGBA4        =  4,
+        IA8          =  5,
 
+        I8           =  7,
         A8           =  8,
+        IA4          =  9,
 
+        A4           = 11,
         // TODO: Support for the other formats is not implemented, yet.
         // Seems like they are luminance formats and compressed textures.
     };
 
-    static unsigned BytesPerPixel(TextureFormat format) {
+    static unsigned NibblesPerPixel(TextureFormat format) {
         switch (format) {
         case TextureFormat::RGBA8:
-            return 4;
+            return 8;
 
         case TextureFormat::RGB8:
-            return 3;
+            return 6;
 
         case TextureFormat::RGBA5551:
         case TextureFormat::RGB565:
         case TextureFormat::RGBA4:
-            return 2;
+        case TextureFormat::IA8:
+            return 4;
 
-        default:
-            // placeholder for yet unknown formats
+        case TextureFormat::A4:
             return 1;
+
+        case TextureFormat::I8:
+        case TextureFormat::A8:
+        case TextureFormat::IA4:
+        default:  // placeholder for yet unknown formats
+            return 2;
         }
     }