Merge pull request #283 from Subv/tsc

GPU: Added sampler information structures (TSC)

3 files changed, 147 insertions, 25 deletions

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 986165c6d..088d4357e 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -294,8 +294,45 @@ void Maxwell3D::ProcessCBData(u32 value) {
     regs.const_buffer.cb_pos = regs.const_buffer.cb_pos + 4;
 }
 
-std::vector<Texture::TICEntry> Maxwell3D::GetStageTextures(Regs::ShaderStage stage) {
-    std::vector<Texture::TICEntry> textures;
+Texture::TICEntry Maxwell3D::GetTICEntry(u32 tic_index) const {
+    GPUVAddr tic_base_address = regs.tic.TICAddress();
+
+    GPUVAddr tic_address_gpu = tic_base_address + tic_index * sizeof(Texture::TICEntry);
+    VAddr tic_address_cpu = memory_manager.PhysicalToVirtualAddress(tic_address_gpu);
+
+    Texture::TICEntry tic_entry;
+    Memory::ReadBlock(tic_address_cpu, &tic_entry, sizeof(Texture::TICEntry));
+
+    ASSERT_MSG(tic_entry.header_version == Texture::TICHeaderVersion::BlockLinear,
+               "TIC versions other than BlockLinear are unimplemented");
+
+    ASSERT_MSG(tic_entry.texture_type == Texture::TextureType::Texture2D,
+               "Texture types other than Texture2D are unimplemented");
+
+    auto r_type = tic_entry.r_type.Value();
+    auto g_type = tic_entry.g_type.Value();
+    auto b_type = tic_entry.b_type.Value();
+    auto a_type = tic_entry.a_type.Value();
+
+    // TODO(Subv): Different data types for separate components are not supported
+    ASSERT(r_type == g_type && r_type == b_type && r_type == a_type);
+
+    return tic_entry;
+}
+
+Texture::TSCEntry Maxwell3D::GetTSCEntry(u32 tsc_index) const {
+    GPUVAddr tsc_base_address = regs.tsc.TSCAddress();
+
+    GPUVAddr tsc_address_gpu = tsc_base_address + tsc_index * sizeof(Texture::TSCEntry);
+    VAddr tsc_address_cpu = memory_manager.PhysicalToVirtualAddress(tsc_address_gpu);
+
+    Texture::TSCEntry tsc_entry;
+    Memory::ReadBlock(tsc_address_cpu, &tsc_entry, sizeof(Texture::TSCEntry));
+    return tsc_entry;
+}
+
+std::vector<Texture::FullTextureInfo> Maxwell3D::GetStageTextures(Regs::ShaderStage stage) const {
+    std::vector<Texture::FullTextureInfo> textures;
 
     auto& fragment_shader = state.shader_stages[static_cast<size_t>(stage)];
     auto& tex_info_buffer = fragment_shader.const_buffers[regs.tex_cb_index];
@@ -309,31 +346,34 @@ std::vector<Texture::TICEntry> Maxwell3D::GetStageTextures(Regs::ShaderStage sta
     static constexpr size_t TextureInfoOffset = 0x20;
 
     for (GPUVAddr current_texture = tex_info_buffer.address + TextureInfoOffset;
-         current_texture < tex_info_buffer_end; current_texture += 4) {
+         current_texture < tex_info_buffer_end; current_texture += sizeof(Texture::TextureHandle)) {
 
-        Texture::TextureHandle tex_info{
+        Texture::TextureHandle tex_handle{
             Memory::Read32(memory_manager.PhysicalToVirtualAddress(current_texture))};
 
-        if (tex_info.tic_id != 0 || tex_info.tsc_id != 0) {
-            GPUVAddr tic_address_gpu =
-                tic_base_address + tex_info.tic_id * sizeof(Texture::TICEntry);
-            VAddr tic_address_cpu = memory_manager.PhysicalToVirtualAddress(tic_address_gpu);
+        Texture::FullTextureInfo tex_info{};
+        // TODO(Subv): Use the shader to determine which textures are actually accessed.
+        tex_info.index = (current_texture - tex_info_buffer.address - TextureInfoOffset) /
+                         sizeof(Texture::TextureHandle);
 
-            Texture::TICEntry tic_entry;
-            Memory::ReadBlock(tic_address_cpu, &tic_entry, sizeof(Texture::TICEntry));
+        // Load the TIC data.
+        if (tex_handle.tic_id != 0) {
+            tex_info.enabled = true;
 
-            auto r_type = tic_entry.r_type.Value();
-            auto g_type = tic_entry.g_type.Value();
-            auto b_type = tic_entry.b_type.Value();
-            auto a_type = tic_entry.a_type.Value();
-
-            // TODO(Subv): Different data types for separate components are not supported
-            ASSERT(r_type == g_type && r_type == b_type && r_type == a_type);
-
-            auto format = tic_entry.format.Value();
+            auto tic_entry = GetTICEntry(tex_handle.tic_id);
+            // TODO(Subv): Workaround for BitField's move constructor being deleted.
+            std::memcpy(&tex_info.tic, &tic_entry, sizeof(tic_entry));
+        }
 
-            textures.push_back(tic_entry);
+        // Load the TSC data
+        if (tex_handle.tsc_id != 0) {
+            auto tsc_entry = GetTSCEntry(tex_handle.tsc_id);
+            // TODO(Subv): Workaround for BitField's move constructor being deleted.
+            std::memcpy(&tex_info.tsc, &tsc_entry, sizeof(tsc_entry));
         }
+
+        if (tex_info.enabled)
+            textures.push_back(tex_info);
     }
 
     return textures;
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 441cc0c19..8e2d888e7 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -432,7 +432,7 @@ public:
     void SubmitMacroCode(u32 entry, std::vector<u32> code);
 
     /// Returns a list of enabled textures for the specified shader stage.
-    std::vector<Texture::TICEntry> GetStageTextures(Regs::ShaderStage stage);
+    std::vector<Texture::FullTextureInfo> GetStageTextures(Regs::ShaderStage stage) const;
 
 private:
     MemoryManager& memory_manager;
@@ -444,6 +444,12 @@ private:
     /// Parameters that have been submitted to the macro call so far.
     std::vector<u32> macro_params;
 
+    /// Retrieves information about a specific TIC entry from the TIC buffer.
+    Texture::TICEntry GetTICEntry(u32 tic_index) const;
+
+    /// Retrieves information about a specific TSC entry from the TSC buffer.
+    Texture::TSCEntry GetTSCEntry(u32 tsc_index) const;
+
     /**
      * Call a macro on this engine.
      * @param method Method to call
diff --git a/src/video_core/textures/texture.h b/src/video_core/textures/texture.h
index d969bcdd9..07936f8a3 100644
--- a/src/video_core/textures/texture.h
+++ b/src/video_core/textures/texture.h
@@ -17,11 +17,32 @@ enum class TextureFormat : u32 {
     DXT1 = 0x24,
 };
 
+enum class TextureType : u32 {
+    Texture1D = 0,
+    Texture2D = 1,
+    Texture3D = 2,
+    TextureCubemap = 3,
+    Texture1DArray = 4,
+    Texture2DArray = 5,
+    Texture1DBuffer = 6,
+    Texture2DNoMipmap = 7,
+    TextureCubeArray = 8,
+};
+
+enum class TICHeaderVersion : u32 {
+    OneDBuffer = 0,
+    PitchColorKey = 1,
+    Pitch = 2,
+    BlockLinear = 3,
+    BlockLinearColorKey = 4,
+};
+
 union TextureHandle {
     u32 raw;
     BitField<0, 20, u32> tic_id;
     BitField<20, 12, u32> tsc_id;
 };
+static_assert(sizeof(TextureHandle) == 4, "TextureHandle has wrong size");
 
 struct TICEntry {
     union {
@@ -33,10 +54,15 @@ struct TICEntry {
         BitField<16, 3, u32> a_type;
     };
     u32 address_low;
-    u16 address_high;
-    INSERT_PADDING_BYTES(6);
-    u16 width_minus_1;
-    INSERT_PADDING_BYTES(2);
+    union {
+        BitField<0, 16, u32> address_high;
+        BitField<21, 3, TICHeaderVersion> header_version;
+    };
+    INSERT_PADDING_BYTES(4);
+    union {
+        BitField<0, 16, u32> width_minus_1;
+        BitField<23, 4, TextureType> texture_type;
+    };
     u16 height_minus_1;
     INSERT_PADDING_BYTES(10);
 
@@ -54,6 +80,56 @@ struct TICEntry {
 };
 static_assert(sizeof(TICEntry) == 0x20, "TICEntry has wrong size");
 
+enum class WrapMode : u32 {
+    Wrap = 0,
+    Mirror = 1,
+    ClampToEdge = 2,
+    Border = 3,
+    ClampOGL = 4,
+    MirrorOnceClampToEdge = 5,
+    MirrorOnceBorder = 6,
+    MirrorOnceClampOGL = 7,
+};
+
+enum class TextureFilter : u32 {
+    Nearest = 1,
+    Linear = 2,
+};
+
+enum class TextureMipmapFilter : u32 {
+    None = 1,
+    Nearest = 2,
+    Linear = 3,
+};
+
+struct TSCEntry {
+    union {
+        BitField<0, 3, WrapMode> wrap_u;
+        BitField<3, 3, WrapMode> wrap_v;
+        BitField<6, 3, WrapMode> wrap_p;
+        BitField<9, 1, u32> depth_compare_enabled;
+        BitField<10, 3, u32> depth_compare_func;
+    };
+    union {
+        BitField<0, 2, TextureFilter> mag_filter;
+        BitField<4, 2, TextureFilter> min_filter;
+        BitField<6, 2, TextureMipmapFilter> mip_filter;
+    };
+    INSERT_PADDING_BYTES(8);
+    u32 border_color_r;
+    u32 border_color_g;
+    u32 border_color_b;
+    u32 border_color_a;
+};
+static_assert(sizeof(TSCEntry) == 0x20, "TSCEntry has wrong size");
+
+struct FullTextureInfo {
+    u32 index;
+    TICEntry tic;
+    TSCEntry tsc;
+    bool enabled;
+};
+
 /// Returns the number of bytes per pixel of the input texture format.
 u32 BytesPerPixel(TextureFormat format);