From b8c75a845b1784045a10fa8b5f1f57f2ec53eeca Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 28 Apr 2019 01:01:22 -0300
Subject: [PATCH] maxwell_3d: Partially implement texture buffers as 1D
 textures

---
 src/video_core/engines/maxwell_3d.cpp          | 12 ++++--------
 .../renderer_opengl/gl_rasterizer_cache.cpp    |  2 +-
 src/video_core/surface.cpp                     |  2 ++
 src/video_core/textures/texture.h              | 18 +++++++++++++++++-
 4 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 08d5536966..8755b8af40 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -430,14 +430,10 @@ Texture::TICEntry Maxwell3D::GetTICEntry(u32 tic_index) const {
     Texture::TICEntry tic_entry;
     memory_manager.ReadBlockUnsafe(tic_address_gpu, &tic_entry, sizeof(Texture::TICEntry));
 
-    ASSERT_MSG(tic_entry.header_version == Texture::TICHeaderVersion::BlockLinear ||
-                   tic_entry.header_version == Texture::TICHeaderVersion::Pitch,
-               "TIC versions other than BlockLinear or Pitch are unimplemented");
-
-    const auto r_type = tic_entry.r_type.Value();
-    const auto g_type = tic_entry.g_type.Value();
-    const auto b_type = tic_entry.b_type.Value();
-    const auto a_type = tic_entry.a_type.Value();
+    const auto r_type{tic_entry.r_type.Value()};
+    const auto g_type{tic_entry.g_type.Value()};
+    const auto b_type{tic_entry.b_type.Value()};
+    const auto a_type{tic_entry.a_type.Value()};
 
     // TODO(Subv): Different data types for separate components are not supported
     DEBUG_ASSERT(r_type == g_type && r_type == b_type && r_type == a_type);
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index a7681902ef..543b362710 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -140,7 +140,7 @@ std::size_t SurfaceParams::InnerMemorySize(bool force_gl, bool layer_only,
 
     params.width = Common::AlignUp(config.tic.Width(), GetCompressionFactor(params.pixel_format));
     params.height = Common::AlignUp(config.tic.Height(), GetCompressionFactor(params.pixel_format));
-    if (!params.is_tiled) {
+    if (config.tic.IsLineal()) {
         params.pitch = config.tic.Pitch();
     }
     params.unaligned_height = config.tic.Height();
diff --git a/src/video_core/surface.cpp b/src/video_core/surface.cpp
index 6384fa8d2c..56c43af17d 100644
--- a/src/video_core/surface.cpp
+++ b/src/video_core/surface.cpp
@@ -12,6 +12,8 @@ SurfaceTarget SurfaceTargetFromTextureType(Tegra::Texture::TextureType texture_t
     switch (texture_type) {
     case Tegra::Texture::TextureType::Texture1D:
         return SurfaceTarget::Texture1D;
+    case Tegra::Texture::TextureType::Texture1DBuffer:
+        return SurfaceTarget::Texture1D; // Fixme
     case Tegra::Texture::TextureType::Texture2D:
     case Tegra::Texture::TextureType::Texture2DNoMipmap:
         return SurfaceTarget::Texture2D;
diff --git a/src/video_core/textures/texture.h b/src/video_core/textures/texture.h
index f22b4e7c77..ddeed73d0a 100644
--- a/src/video_core/textures/texture.h
+++ b/src/video_core/textures/texture.h
@@ -172,12 +172,16 @@ struct TICEntry {
         BitField<26, 1, u32> use_header_opt_control;
         BitField<27, 1, u32> depth_texture;
         BitField<28, 4, u32> max_mip_level;
+
+        BitField<0, 16, u32> buffer_high_width_minus_one;
     };
     union {
         BitField<0, 16, u32> width_minus_1;
         BitField<22, 1, u32> srgb_conversion;
         BitField<23, 4, TextureType> texture_type;
         BitField<29, 3, u32> border_size;
+
+        BitField<0, 16, u32> buffer_low_width_minus_one;
     };
     union {
         BitField<0, 16, u32> height_minus_1;
@@ -206,7 +210,10 @@ struct TICEntry {
     }
 
     u32 Width() const {
-        return width_minus_1 + 1;
+        if (header_version != TICHeaderVersion::OneDBuffer) {
+            return width_minus_1 + 1;
+        }
+        return (buffer_high_width_minus_one << 16) | buffer_low_width_minus_one;
     }
 
     u32 Height() const {
@@ -237,6 +244,15 @@ struct TICEntry {
                header_version == TICHeaderVersion::BlockLinearColorKey;
     }
 
+    bool IsLineal() const {
+        return header_version == TICHeaderVersion::Pitch ||
+               header_version == TICHeaderVersion::PitchColorKey;
+    }
+
+    bool IsBuffer() const {
+        return header_version == TICHeaderVersion::OneDBuffer;
+    }
+
     bool IsSrgbConversionEnabled() const {
         return srgb_conversion != 0;
     }