forked from dolphin-emu/dolphin
712 lines
18 KiB
C++
712 lines
18 KiB
C++
// Copyright 2009 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "VideoBackends/Software/EfbInterface.h"
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#include <algorithm>
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#include <array>
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#include <cstddef>
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#include <cstring>
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#include <vector>
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/Swap.h"
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#include "VideoBackends/Software/CopyRegion.h"
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#include "VideoCommon/BPMemory.h"
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#include "VideoCommon/LookUpTables.h"
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#include "VideoCommon/PerfQueryBase.h"
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namespace EfbInterface
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{
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static std::array<u8, EFB_WIDTH * EFB_HEIGHT * 6> efb;
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static std::array<u32, PQ_NUM_MEMBERS> perf_values;
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static inline u32 GetColorOffset(u16 x, u16 y)
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{
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return (x + y * EFB_WIDTH) * 3;
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}
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static inline u32 GetDepthOffset(u16 x, u16 y)
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{
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constexpr u32 depth_buffer_start = EFB_WIDTH * EFB_HEIGHT * 3;
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return (x + y * EFB_WIDTH) * 3 + depth_buffer_start;
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}
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static void SetPixelAlphaOnly(u32 offset, u8 a)
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{
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::Z24:
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case PEControl::RGB565_Z16:
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// do nothing
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break;
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case PEControl::RGBA6_Z24:
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{
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u32 a32 = a;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xffffffc0;
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val |= (a32 >> 2) & 0x0000003f;
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*dst = val;
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}
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break;
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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}
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}
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static void SetPixelColorOnly(u32 offset, u8* rgb)
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{
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::Z24:
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{
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u32 src = *(u32*)rgb;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= src >> 8;
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*dst = val;
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}
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break;
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case PEControl::RGBA6_Z24:
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{
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u32 src = *(u32*)rgb;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff00003f;
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val |= (src >> 4) & 0x00000fc0; // blue
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val |= (src >> 6) & 0x0003f000; // green
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val |= (src >> 8) & 0x00fc0000; // red
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*dst = val;
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}
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break;
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case PEControl::RGB565_Z16:
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{
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INFO_LOG(VIDEO, "RGB565_Z16 is not supported correctly yet");
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u32 src = *(u32*)rgb;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= src >> 8;
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*dst = val;
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}
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break;
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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}
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}
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static void SetPixelAlphaColor(u32 offset, u8* color)
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{
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::Z24:
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{
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u32 src = *(u32*)color;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= src >> 8;
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*dst = val;
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}
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break;
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case PEControl::RGBA6_Z24:
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{
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u32 src = *(u32*)color;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= (src >> 2) & 0x0000003f; // alpha
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val |= (src >> 4) & 0x00000fc0; // blue
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val |= (src >> 6) & 0x0003f000; // green
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val |= (src >> 8) & 0x00fc0000; // red
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*dst = val;
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}
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break;
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case PEControl::RGB565_Z16:
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{
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INFO_LOG(VIDEO, "RGB565_Z16 is not supported correctly yet");
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u32 src = *(u32*)color;
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= src >> 8;
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*dst = val;
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}
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break;
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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}
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}
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static u32 GetPixelColor(u32 offset)
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{
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u32 src;
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std::memcpy(&src, &efb[offset], sizeof(u32));
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::Z24:
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return 0xff | ((src & 0x00ffffff) << 8);
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case PEControl::RGBA6_Z24:
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return Convert6To8(src & 0x3f) | // Alpha
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Convert6To8((src >> 6) & 0x3f) << 8 | // Blue
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Convert6To8((src >> 12) & 0x3f) << 16 | // Green
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Convert6To8((src >> 18) & 0x3f) << 24; // Red
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case PEControl::RGB565_Z16:
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INFO_LOG(VIDEO, "RGB565_Z16 is not supported correctly yet");
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return 0xff | ((src & 0x00ffffff) << 8);
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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return 0;
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}
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}
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static void SetPixelDepth(u32 offset, u32 depth)
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{
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::RGBA6_Z24:
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case PEControl::Z24:
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{
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= depth & 0x00ffffff;
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*dst = val;
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}
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break;
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case PEControl::RGB565_Z16:
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{
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INFO_LOG(VIDEO, "RGB565_Z16 is not supported correctly yet");
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u32* dst = (u32*)&efb[offset];
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u32 val = *dst & 0xff000000;
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val |= depth & 0x00ffffff;
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*dst = val;
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}
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break;
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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}
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}
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static u32 GetPixelDepth(u32 offset)
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{
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u32 depth = 0;
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switch (bpmem.zcontrol.pixel_format)
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{
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case PEControl::RGB8_Z24:
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case PEControl::RGBA6_Z24:
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case PEControl::Z24:
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{
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depth = (*(u32*)&efb[offset]) & 0x00ffffff;
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}
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break;
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case PEControl::RGB565_Z16:
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{
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INFO_LOG(VIDEO, "RGB565_Z16 is not supported correctly yet");
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depth = (*(u32*)&efb[offset]) & 0x00ffffff;
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}
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break;
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default:
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ERROR_LOG(VIDEO, "Unsupported pixel format: %i", static_cast<int>(bpmem.zcontrol.pixel_format));
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}
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return depth;
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}
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static u32 GetSourceFactor(u8* srcClr, u8* dstClr, BlendMode::BlendFactor mode)
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{
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switch (mode)
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{
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case BlendMode::ZERO:
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return 0;
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case BlendMode::ONE:
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return 0xffffffff;
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case BlendMode::DSTCLR:
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return *(u32*)dstClr;
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case BlendMode::INVDSTCLR:
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return 0xffffffff - *(u32*)dstClr;
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case BlendMode::SRCALPHA:
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{
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u8 alpha = srcClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::INVSRCALPHA:
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{
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u8 alpha = 0xff - srcClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::DSTALPHA:
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{
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u8 alpha = dstClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::INVDSTALPHA:
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{
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u8 alpha = 0xff - dstClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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}
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return 0;
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}
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static u32 GetDestinationFactor(u8* srcClr, u8* dstClr, BlendMode::BlendFactor mode)
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{
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switch (mode)
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{
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case BlendMode::ZERO:
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return 0;
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case BlendMode::ONE:
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return 0xffffffff;
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case BlendMode::SRCCLR:
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return *(u32*)srcClr;
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case BlendMode::INVSRCCLR:
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return 0xffffffff - *(u32*)srcClr;
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case BlendMode::SRCALPHA:
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{
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u8 alpha = srcClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::INVSRCALPHA:
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{
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u8 alpha = 0xff - srcClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::DSTALPHA:
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{
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u8 alpha = dstClr[ALP_C] & 0xff;
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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case BlendMode::INVDSTALPHA:
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{
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u8 alpha = 0xff - dstClr[ALP_C];
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u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
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return factor;
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}
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}
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return 0;
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}
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static void BlendColor(u8* srcClr, u8* dstClr)
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{
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u32 srcFactor = GetSourceFactor(srcClr, dstClr, bpmem.blendmode.srcfactor);
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u32 dstFactor = GetDestinationFactor(srcClr, dstClr, bpmem.blendmode.dstfactor);
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for (int i = 0; i < 4; i++)
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{
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// add MSB of factors to make their range 0 -> 256
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u32 sf = (srcFactor & 0xff);
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sf += sf >> 7;
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u32 df = (dstFactor & 0xff);
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df += df >> 7;
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u32 color = (srcClr[i] * sf + dstClr[i] * df) >> 8;
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dstClr[i] = (color > 255) ? 255 : color;
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dstFactor >>= 8;
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srcFactor >>= 8;
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}
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}
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static void LogicBlend(u32 srcClr, u32* dstClr, BlendMode::LogicOp op)
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{
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switch (op)
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{
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case BlendMode::CLEAR:
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*dstClr = 0;
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break;
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case BlendMode::AND:
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*dstClr = srcClr & *dstClr;
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break;
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case BlendMode::AND_REVERSE:
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*dstClr = srcClr & (~*dstClr);
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break;
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case BlendMode::COPY:
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*dstClr = srcClr;
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break;
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case BlendMode::AND_INVERTED:
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*dstClr = (~srcClr) & *dstClr;
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break;
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case BlendMode::NOOP:
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// Do nothing
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break;
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case BlendMode::XOR:
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*dstClr = srcClr ^ *dstClr;
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break;
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case BlendMode::OR:
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*dstClr = srcClr | *dstClr;
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break;
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case BlendMode::NOR:
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*dstClr = ~(srcClr | *dstClr);
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break;
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case BlendMode::EQUIV:
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*dstClr = ~(srcClr ^ *dstClr);
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break;
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case BlendMode::INVERT:
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*dstClr = ~*dstClr;
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break;
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case BlendMode::OR_REVERSE:
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*dstClr = srcClr | (~*dstClr);
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break;
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case BlendMode::COPY_INVERTED:
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*dstClr = ~srcClr;
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break;
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case BlendMode::OR_INVERTED:
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*dstClr = (~srcClr) | *dstClr;
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break;
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case BlendMode::NAND:
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*dstClr = ~(srcClr & *dstClr);
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break;
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case BlendMode::SET:
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*dstClr = 0xffffffff;
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break;
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}
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}
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static void SubtractBlend(u8* srcClr, u8* dstClr)
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{
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for (int i = 0; i < 4; i++)
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{
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int c = (int)dstClr[i] - (int)srcClr[i];
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dstClr[i] = (c < 0) ? 0 : c;
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}
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}
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static void Dither(u16 x, u16 y, u8* color)
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{
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// No blending for RGB8 mode
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if (!bpmem.blendmode.dither || bpmem.zcontrol.pixel_format != PEControl::PixelFormat::RGBA6_Z24)
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return;
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// Flipper uses a standard 2x2 Bayer Matrix for 6 bit dithering
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static const u8 dither[2][2] = {{0, 2}, {3, 1}};
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// Only the color channels are dithered?
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for (int i = BLU_C; i <= RED_C; i++)
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color[i] = ((color[i] - (color[i] >> 6)) + dither[y & 1][x & 1]) & 0xfc;
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}
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void BlendTev(u16 x, u16 y, u8* color)
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{
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const u32 offset = GetColorOffset(x, y);
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u32 dstClr = GetPixelColor(offset);
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u8* dstClrPtr = (u8*)&dstClr;
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if (bpmem.blendmode.blendenable)
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{
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if (bpmem.blendmode.subtract)
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SubtractBlend(color, dstClrPtr);
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else
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BlendColor(color, dstClrPtr);
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}
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else if (bpmem.blendmode.logicopenable)
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{
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LogicBlend(*((u32*)color), &dstClr, bpmem.blendmode.logicmode);
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}
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else
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{
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dstClrPtr = color;
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}
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if (bpmem.dstalpha.enable)
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dstClrPtr[ALP_C] = bpmem.dstalpha.alpha;
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if (bpmem.blendmode.colorupdate)
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{
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Dither(x, y, dstClrPtr);
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if (bpmem.blendmode.alphaupdate)
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SetPixelAlphaColor(offset, dstClrPtr);
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else
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SetPixelColorOnly(offset, dstClrPtr);
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}
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else if (bpmem.blendmode.alphaupdate)
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{
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SetPixelAlphaOnly(offset, dstClrPtr[ALP_C]);
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}
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}
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void SetColor(u16 x, u16 y, u8* color)
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{
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u32 offset = GetColorOffset(x, y);
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if (bpmem.blendmode.colorupdate)
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{
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if (bpmem.blendmode.alphaupdate)
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SetPixelAlphaColor(offset, color);
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else
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SetPixelColorOnly(offset, color);
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}
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else if (bpmem.blendmode.alphaupdate)
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{
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SetPixelAlphaOnly(offset, color[ALP_C]);
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}
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}
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void SetDepth(u16 x, u16 y, u32 depth)
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{
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if (bpmem.zmode.updateenable)
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SetPixelDepth(GetDepthOffset(x, y), depth);
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}
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u32 GetColor(u16 x, u16 y)
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{
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u32 offset = GetColorOffset(x, y);
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return GetPixelColor(offset);
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}
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static u32 VerticalFilter(const std::array<u32, 3>& colors,
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const std::array<u8, 7>& filterCoefficients)
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{
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u8 in_colors[3][4];
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std::memcpy(&in_colors, colors.data(), sizeof(in_colors));
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// Alpha channel is not used
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u8 out_color[4];
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out_color[ALP_C] = 0;
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// All Coefficients should sum to 64, otherwise the total brightness will change, which many games
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// do on purpose to implement a brightness filter across the whole copy.
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for (int i = BLU_C; i <= RED_C; i++)
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{
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// TODO: implement support for multisampling.
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// In non-multisampling mode:
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// * Coefficients 2, 3 and 4 sample from the current pixel.
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// * Coefficients 0 and 1 sample from the pixel above this one
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// * Coefficients 5 and 6 sample from the pixel below this one
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int sum =
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in_colors[0][i] * (filterCoefficients[0] + filterCoefficients[1]) +
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in_colors[1][i] * (filterCoefficients[2] + filterCoefficients[3] + filterCoefficients[4]) +
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in_colors[2][i] * (filterCoefficients[5] + filterCoefficients[6]);
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// TODO: this clamping behavior appears to be correct, but isn't confirmed on hardware.
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out_color[i] = std::min(255, sum >> 6); // clamp larger values to 255
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}
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u32 out_color32;
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std::memcpy(&out_color32, out_color, sizeof(out_color32));
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return out_color32;
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}
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static u32 GammaCorrection(u32 color, const float gamma_rcp)
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{
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u8 in_colors[4];
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std::memcpy(&in_colors, &color, sizeof(in_colors));
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u8 out_color[4];
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for (int i = BLU_C; i <= RED_C; i++)
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{
|
|
out_color[i] = static_cast<u8>(
|
|
MathUtil::Clamp(std::pow(in_colors[i] / 255.0f, gamma_rcp) * 255.0f, 0.0f, 255.0f));
|
|
}
|
|
|
|
u32 out_color32;
|
|
std::memcpy(&out_color32, out_color, sizeof(out_color32));
|
|
return out_color32;
|
|
}
|
|
|
|
// For internal used only, return a non-normalized value, which saves work later.
|
|
static yuv444 ConvertColorToYUV(u32 color)
|
|
{
|
|
const u8 red = static_cast<u8>(color >> 24);
|
|
const u8 green = static_cast<u8>(color >> 16);
|
|
const u8 blue = static_cast<u8>(color >> 8);
|
|
|
|
// GameCube/Wii uses the BT.601 standard algorithm for converting to YCbCr; see
|
|
// http://www.equasys.de/colorconversion.html#YCbCr-RGBColorFormatConversion
|
|
return {static_cast<u8>(0.257f * red + 0.504f * green + 0.098f * blue),
|
|
static_cast<s8>(-0.148f * red + -0.291f * green + 0.439f * blue),
|
|
static_cast<s8>(0.439f * red + -0.368f * green + -0.071f * blue)};
|
|
}
|
|
|
|
u32 GetDepth(u16 x, u16 y)
|
|
{
|
|
u32 offset = GetDepthOffset(x, y);
|
|
return GetPixelDepth(offset);
|
|
}
|
|
|
|
u8* GetPixelPointer(u16 x, u16 y, bool depth)
|
|
{
|
|
if (depth)
|
|
return &efb[GetDepthOffset(x, y)];
|
|
return &efb[GetColorOffset(x, y)];
|
|
}
|
|
|
|
void EncodeXFB(u8* xfb_in_ram, u32 memory_stride, const EFBRectangle& source_rect, float y_scale,
|
|
float gamma)
|
|
{
|
|
if (!xfb_in_ram)
|
|
{
|
|
WARN_LOG(VIDEO, "Tried to copy to invalid XFB address");
|
|
return;
|
|
}
|
|
|
|
const int left = source_rect.left;
|
|
const int right = source_rect.right;
|
|
const bool clamp_top = bpmem.triggerEFBCopy.clamp_top;
|
|
const bool clamp_bottom = bpmem.triggerEFBCopy.clamp_bottom;
|
|
const float gamma_rcp = 1.0f / gamma;
|
|
const auto filter_coefficients = bpmem.copyfilter.GetCoefficients();
|
|
|
|
// this assumes copies will always start on an even (YU) pixel and the
|
|
// copy always has an even width, which might not be true.
|
|
if (left & 1 || right & 1)
|
|
{
|
|
WARN_LOG(VIDEO, "Trying to copy XFB to from unaligned EFB source");
|
|
// this will show up as wrongly encoded
|
|
}
|
|
|
|
// Scanline buffer, leave room for borders
|
|
yuv444 scanline[EFB_WIDTH + 2];
|
|
|
|
static std::vector<yuv422_packed> source;
|
|
source.resize(EFB_WIDTH * EFB_HEIGHT);
|
|
yuv422_packed* src_ptr = &source[0];
|
|
|
|
for (int y = source_rect.top; y < source_rect.bottom; y++)
|
|
{
|
|
// Clamping behavior
|
|
// NOTE: when the clamp bits aren't set, the hardware will happily read beyond the EFB,
|
|
// which returns random garbage from the empty bus (confirmed by hardware tests).
|
|
//
|
|
// In our implementation, the garbage just so happens to be the top or bottom row.
|
|
// Statistically, that could happen.
|
|
u16 y_prev = static_cast<u16>(std::max(clamp_top ? source_rect.top : 0, y - 1));
|
|
u16 y_next = static_cast<u16>(std::min(clamp_bottom ? source_rect.bottom : EFB_HEIGHT, y + 1));
|
|
|
|
// Get a scanline of YUV pixels in 4:4:4 format
|
|
for (int i = 1, x = left; x < right; i++, x++)
|
|
{
|
|
// Get RGB colors
|
|
std::array<u32, 3> colors = {{GetColor(x, y_prev), GetColor(x, y), GetColor(x, y_next)}};
|
|
|
|
// Vertical Filter (Multisampling resolve, deflicker, brightness)
|
|
u32 filtered = VerticalFilter(colors, filter_coefficients);
|
|
|
|
// Gamma correction happens here.
|
|
filtered = GammaCorrection(filtered, gamma_rcp);
|
|
|
|
scanline[i] = ConvertColorToYUV(filtered);
|
|
}
|
|
|
|
// Flipper clamps the border colors
|
|
scanline[0] = scanline[1];
|
|
scanline[right + 1] = scanline[right];
|
|
|
|
// And Downsample them to 4:2:2
|
|
for (int i = 1, x = left; x < right; i += 2, x += 2)
|
|
{
|
|
// YU pixel
|
|
src_ptr[x].Y = scanline[i].Y + 16;
|
|
// we mix our color differences in 10 bit space so it will round more accurately
|
|
// U[i] = 1/4 * U[i-1] + 1/2 * U[i] + 1/4 * U[i+1]
|
|
src_ptr[x].UV = 128 + ((scanline[i - 1].U + (scanline[i].U << 1) + scanline[i + 1].U) >> 2);
|
|
|
|
// YV pixel
|
|
src_ptr[x + 1].Y = scanline[i + 1].Y + 16;
|
|
// V[i] = 1/4 * V[i-1] + 1/2 * V[i] + 1/4 * V[i+1]
|
|
src_ptr[x + 1].UV =
|
|
128 + ((scanline[i - 1].V + (scanline[i].V << 1) + scanline[i + 1].V) >> 2);
|
|
}
|
|
src_ptr += memory_stride;
|
|
}
|
|
|
|
auto dest_rect = EFBRectangle{source_rect.left, source_rect.top, source_rect.right,
|
|
static_cast<int>(static_cast<float>(source_rect.bottom) * y_scale)};
|
|
|
|
const std::size_t destination_size = dest_rect.GetWidth() * dest_rect.GetHeight() * 2;
|
|
static std::vector<yuv422_packed> destination;
|
|
destination.resize(dest_rect.GetWidth() * dest_rect.GetHeight());
|
|
|
|
SW::CopyRegion(source.data(), source_rect, destination.data(), dest_rect);
|
|
|
|
memcpy(xfb_in_ram, destination.data(), destination_size);
|
|
}
|
|
|
|
bool ZCompare(u16 x, u16 y, u32 z)
|
|
{
|
|
u32 offset = GetDepthOffset(x, y);
|
|
u32 depth = GetPixelDepth(offset);
|
|
|
|
bool pass;
|
|
|
|
switch (bpmem.zmode.func)
|
|
{
|
|
case ZMode::NEVER:
|
|
pass = false;
|
|
break;
|
|
case ZMode::LESS:
|
|
pass = z < depth;
|
|
break;
|
|
case ZMode::EQUAL:
|
|
pass = z == depth;
|
|
break;
|
|
case ZMode::LEQUAL:
|
|
pass = z <= depth;
|
|
break;
|
|
case ZMode::GREATER:
|
|
pass = z > depth;
|
|
break;
|
|
case ZMode::NEQUAL:
|
|
pass = z != depth;
|
|
break;
|
|
case ZMode::GEQUAL:
|
|
pass = z >= depth;
|
|
break;
|
|
case ZMode::ALWAYS:
|
|
pass = true;
|
|
break;
|
|
default:
|
|
pass = false;
|
|
ERROR_LOG(VIDEO, "Bad Z compare mode %i", (int)bpmem.zmode.func);
|
|
}
|
|
|
|
if (pass && bpmem.zmode.updateenable)
|
|
{
|
|
SetPixelDepth(offset, z);
|
|
}
|
|
|
|
return pass;
|
|
}
|
|
|
|
u32 GetPerfQueryResult(PerfQueryType type)
|
|
{
|
|
return perf_values[type];
|
|
}
|
|
|
|
void ResetPerfQuery()
|
|
{
|
|
perf_values = {};
|
|
}
|
|
|
|
void IncPerfCounterQuadCount(PerfQueryType type)
|
|
{
|
|
// NOTE: hardware doesn't process individual pixels but quads instead.
|
|
// Current software renderer architecture works on pixels though, so
|
|
// we have this "quad" hack here to only increment the registers on
|
|
// every fourth rendered pixel
|
|
static u32 quad[PQ_NUM_MEMBERS];
|
|
if (++quad[type] != 3)
|
|
return;
|
|
quad[type] = 0;
|
|
++perf_values[type];
|
|
}
|
|
}
|