From 414b0741c445a7960f9ad1ee4a5672f8af4760db Mon Sep 17 00:00:00 2001 From: Subv Date: Sun, 8 Mar 2015 12:05:17 -0500 Subject: GPU: Implemented more depth buffer formats. This fixes the horizontal lines in Picross E, Cubic Ninja, Cave Story 3D and possibly others --- src/core/hw/gpu.cpp | 4 +-- src/core/hw/gpu.h | 6 ++--- src/video_core/color.h | 57 ++++++++++++++++++++++++++++++++++++++++ src/video_core/pica.h | 7 +++++ src/video_core/rasterizer.cpp | 60 ++++++++++++++++++++++++++++++++++++------- 5 files changed, 120 insertions(+), 14 deletions(-) diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp index 424ce2ca..b7102b87 100644 --- a/src/core/hw/gpu.cpp +++ b/src/core/hw/gpu.cpp @@ -81,9 +81,9 @@ inline void Write(u32 addr, const T data) { if (config.fill_24bit) { // fill with 24-bit values for (u8* ptr = start; ptr < end; ptr += 3) { - ptr[0] = config.value_24bit_b; + ptr[0] = config.value_24bit_r; ptr[1] = config.value_24bit_g; - ptr[2] = config.value_24bit_r; + ptr[2] = config.value_24bit_b; } } else if (config.fill_32bit) { // fill with 32-bit values diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h index 737b1e96..5ca4a545 100644 --- a/src/core/hw/gpu.h +++ b/src/core/hw/gpu.h @@ -100,10 +100,10 @@ struct Regs { // Set to 1 upon completion. BitField<0, 1, u32> finished; - // 0: fill with 16- or 32-bit wide values; 1: fill with 24-bit wide values + // If both of these bits are unset, then it will fill the memory with a 16 bit value + // 1: fill with 24-bit wide values BitField<8, 1, u32> fill_24bit; - - // 0: fill with 16-bit wide values; 1: fill with 32-bit wide values + // 1: fill with 32-bit wide values BitField<9, 1, u32> fill_32bit; }; diff --git a/src/video_core/color.h b/src/video_core/color.h index 35da901f..35b56efc 100644 --- a/src/video_core/color.h +++ b/src/video_core/color.h @@ -100,6 +100,33 @@ inline const Math::Vec4 DecodeRGBA4(const u8* bytes) { Convert4To8((pixel >> 4) & 0xF), Convert4To8(pixel & 0xF) }; } +/** + * Decode a depth value stored in D16 format + * @param bytes Pointer to encoded source value + * @return Depth value as an u32 + */ +inline const u32 DecodeD16(const u8* bytes) { + return *reinterpret_cast(bytes); +} + +/** + * Decode a depth value stored in D24 format + * @param bytes Pointer to encoded source value + * @return Depth value as an u32 + */ +inline const u32 DecodeD24(const u8* bytes) { + return (bytes[2] << 16) | (bytes[1] << 8) | bytes[0]; +} + +/** + * Decode a depth value and a stencil value stored in D24S8 format + * @param bytes Pointer to encoded source values + * @return Resulting values stored as a Math::Vec2 + */ +inline const Math::Vec2 DecodeD24S8(const u8* bytes) { + return { (bytes[2] << 16) | (bytes[1] << 8) | bytes[0], bytes[3] }; +} + /** * Encode a color as RGBA8 format * @param color Source color to encode @@ -153,4 +180,34 @@ inline void EncodeRGBA4(const Math::Vec4& color, u8* bytes) { (Convert8To4(color.g()) << 8) | (Convert8To4(color.b()) << 4) | Convert8To4(color.a()); } +/** + * Encode a depth value as D16 format + * @param value Source depth value to encode + * @param bytes Pointer where to store the encoded value + */ +inline void EncodeD16(u32 value, u8* bytes) { + *reinterpret_cast(bytes) = value & 0xFFFF; +} + +/** + * Encode a depth value as D24 format + * @param value Source depth value to encode + * @param bytes Pointer where to store the encoded value + */ +inline void EncodeD24(u32 value, u8* bytes) { + bytes[0] = value & 0xFF; + bytes[1] = (value >> 8) & 0xFF; + bytes[2] = (value >> 16) & 0xFF; +} + +/** + * Encode depth and stencil values as D24S8 format + * @param depth Source depth values to encode + * @param stencil Source stencil value to encode + * @param bytes Pointer where to store the encoded value + */ +inline void EncodeD24S8(u32 depth, u8 stencil, u8* bytes) { + *reinterpret_cast(bytes) = (stencil << 24) | depth; +} + } // namespace diff --git a/src/video_core/pica.h b/src/video_core/pica.h index b14de927..6549693f 100644 --- a/src/video_core/pica.h +++ b/src/video_core/pica.h @@ -418,6 +418,13 @@ struct Regs { RGBA4 = 4, }; + enum DepthFormat : u32 { + D16 = 0, + + D24 = 2, + D24S8 = 3 + }; + INSERT_PADDING_WORDS(0x6); u32 depth_format; diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp index 5861c192..dc32128c 100644 --- a/src/video_core/rasterizer.cpp +++ b/src/video_core/rasterizer.cpp @@ -91,7 +91,7 @@ static const Math::Vec4 GetPixel(int x, int y) { } return {}; - } +} static u32 GetDepth(int x, int y) { const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress(); @@ -100,23 +100,65 @@ static u32 GetDepth(int x, int y) { y = (registers.framebuffer.height - y); const u32 coarse_y = y & ~7; - u32 stride = registers.framebuffer.width * 2; - // Assuming 16-bit depth buffer format until actual format handling is implemented - return *(u16*)(depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride); + switch (registers.framebuffer.depth_format) { + case registers.framebuffer.D16: + { + u32 stride = registers.framebuffer.width * 2; + return Color::DecodeD16(depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride); + } + case registers.framebuffer.D24: + { + u32 stride = registers.framebuffer.width * 3; + u8* address = depth_buffer + VideoCore::GetMortonOffset(x, y, 3) + coarse_y * stride; + return Color::DecodeD24(address); + } + case registers.framebuffer.D24S8: + { + u32 stride = registers.framebuffer.width * 4; + return Color::DecodeD24S8(depth_buffer + VideoCore::GetMortonOffset(x, y, 4) + coarse_y * stride).x; + } + default: + LOG_CRITICAL(HW_GPU, "Unimplemented depth format %u", registers.framebuffer.depth_format); + UNIMPLEMENTED(); + return 0; + } } -static void SetDepth(int x, int y, u16 value) { +static void SetDepth(int x, int y, u32 value) { const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress(); u8* depth_buffer = Memory::GetPointer(PAddrToVAddr(addr)); y = (registers.framebuffer.height - y); const u32 coarse_y = y & ~7; - u32 stride = registers.framebuffer.width * 2; - // Assuming 16-bit depth buffer format until actual format handling is implemented - *(u16*)(depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride) = value; + switch (registers.framebuffer.depth_format) { + case registers.framebuffer.D16: + { + u32 stride = registers.framebuffer.width * 2; + Color::EncodeD16(value, depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride); + break; + } + case registers.framebuffer.D24: + { + u32 stride = registers.framebuffer.width * 3; + u8* address = depth_buffer + VideoCore::GetMortonOffset(x, y, 3) + coarse_y * stride; + Color::EncodeD24(value, address); + break; + } + case registers.framebuffer.D24S8: + { + u32 stride = registers.framebuffer.width * 4; + // TODO(Subv): Implement the stencil buffer + Color::EncodeD24S8(value, 0, depth_buffer + VideoCore::GetMortonOffset(x, y, 4) + coarse_y * stride); + break; + } + default: + LOG_CRITICAL(HW_GPU, "Unimplemented depth format %u", registers.framebuffer.depth_format); + UNIMPLEMENTED(); + break; + } } // NOTE: Assuming that rasterizer coordinates are 12.4 fixed-point values @@ -595,7 +637,7 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0, u16 z = (u16)((v0.screenpos[2].ToFloat32() * w0 + v1.screenpos[2].ToFloat32() * w1 + v2.screenpos[2].ToFloat32() * w2) * 65535.f / wsum); - u16 ref_z = GetDepth(x >> 4, y >> 4); + u32 ref_z = GetDepth(x >> 4, y >> 4); bool pass = false; -- cgit v1.2.3