dolphin/Source/Core/VideoBackends/Software/EfbInterface.cpp

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "Common/Common.h"
#include "Core/HW/Memmap.h"
#include "VideoBackends/Software/BPMemLoader.h"
#include "VideoBackends/Software/EfbInterface.h"
#include "VideoBackends/Software/SWPixelEngine.h"
#include "VideoCommon/LookUpTables.h"
u8 efb[EFB_WIDTH*EFB_HEIGHT*6];
namespace EfbInterface
{
inline u32 GetColorOffset(u16 x, u16 y)
{
return (x + y * EFB_WIDTH) * 3;
}
inline u32 GetDepthOffset(u16 x, u16 y)
{
return (x + y * EFB_WIDTH) * 3 + DEPTH_BUFFER_START;
}
void DoState(PointerWrap &p)
{
p.DoArray(efb, EFB_WIDTH*EFB_HEIGHT*6);
}
void SetPixelAlphaOnly(u32 offset, u8 a)
{
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_Z24:
case PIXELFMT_RGB565_Z16:
// do nothing
break;
case PIXELFMT_RGBA6_Z24:
{
u32 a32 = a;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xffffffc0;
val |= (a32 >> 2) & 0x0000003f;
*dst = val;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
}
void SetPixelColorOnly(u32 offset, u8 *rgb)
{
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_Z24:
{
u32 src = *(u32*)rgb;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= src >> 8;
*dst = val;
}
break;
case PIXELFMT_RGBA6_Z24:
{
u32 src = *(u32*)rgb;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff00003f;
val |= (src >> 4) & 0x00000fc0; // blue
val |= (src >> 6) & 0x0003f000; // green
val |= (src >> 8) & 0x00fc0000; // red
*dst = val;
}
break;
case PIXELFMT_RGB565_Z16:
{
INFO_LOG(VIDEO, "PIXELFMT_RGB565_Z16 is not supported correctly yet");
u32 src = *(u32*)rgb;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= src >> 8;
*dst = val;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
}
void SetPixelAlphaColor(u32 offset, u8 *color)
{
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_Z24:
{
u32 src = *(u32*)color;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= src >> 8;
*dst = val;
}
break;
case PIXELFMT_RGBA6_Z24:
{
u32 src = *(u32*)color;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= (src >> 2) & 0x0000003f; // alpha
val |= (src >> 4) & 0x00000fc0; // blue
val |= (src >> 6) & 0x0003f000; // green
val |= (src >> 8) & 0x00fc0000; // red
*dst = val;
}
break;
case PIXELFMT_RGB565_Z16:
{
INFO_LOG(VIDEO, "PIXELFMT_RGB565_Z16 is not supported correctly yet");
u32 src = *(u32*)color;
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= src >> 8;
*dst = val;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
}
void GetPixelColor(u32 offset, u8 *color)
{
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_Z24:
{
u32 src = *(u32*)&efb[offset];
u32 *dst = (u32*)color;
u32 val = 0xff | ((src & 0x00ffffff) << 8);
*dst = val;
}
break;
case PIXELFMT_RGBA6_Z24:
{
u32 src = *(u32*)&efb[offset];
color[ALP_C] = Convert6To8(src & 0x3f);
color[BLU_C] = Convert6To8((src >> 6) & 0x3f);
color[GRN_C] = Convert6To8((src >> 12) & 0x3f);
color[RED_C] = Convert6To8((src >> 18) & 0x3f);
}
break;
case PIXELFMT_RGB565_Z16:
{
INFO_LOG(VIDEO, "PIXELFMT_RGB565_Z16 is not supported correctly yet");
u32 src = *(u32*)&efb[offset];
u32 *dst = (u32*)color;
u32 val = 0xff | ((src & 0x00ffffff) << 8);
*dst = val;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
}
void SetPixelDepth(u32 offset, u32 depth)
{
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_RGBA6_Z24:
case PIXELFMT_Z24:
{
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= depth & 0x00ffffff;
*dst = val;
}
break;
case PIXELFMT_RGB565_Z16:
{
INFO_LOG(VIDEO, "PIXELFMT_RGB565_Z16 is not supported correctly yet");
u32 *dst = (u32*)&efb[offset];
u32 val = *dst & 0xff000000;
val |= depth & 0x00ffffff;
*dst = val;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
}
u32 GetPixelDepth(u32 offset)
{
u32 depth = 0;
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_RGBA6_Z24:
case PIXELFMT_Z24:
{
depth = (*(u32*)&efb[offset]) & 0x00ffffff;
}
break;
case PIXELFMT_RGB565_Z16:
{
INFO_LOG(VIDEO, "PIXELFMT_RGB565_Z16 is not supported correctly yet");
depth = (*(u32*)&efb[offset]) & 0x00ffffff;
}
break;
default:
ERROR_LOG(VIDEO, "Unsupported pixel format: %i", bpmem.zcontrol.pixel_format);
}
return depth;
}
u32 GetSourceFactor(u8 *srcClr, u8 *dstClr, int mode)
{
switch (mode) {
case 0: // zero
return 0;
case 1: // one
return 0xffffffff;
case 2: // dstclr
return *(u32*)dstClr;
case 3: // invdstclr
return 0xffffffff - *(u32*)dstClr;
case 4: // srcalpha
{
u8 alpha = srcClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 5: // invsrcalpha
{
u8 alpha = 0xff - srcClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 6: // dstalpha
{
u8 alpha = dstClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 7: // invdstalpha
{
u8 alpha = 0xff - dstClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
}
return 0;
}
u32 GetDestinationFactor(u8 *srcClr, u8 *dstClr, int mode)
{
switch (mode) {
case 0: // zero
return 0;
case 1: // one
return 0xffffffff;
case 2: // srcclr
return *(u32*)srcClr;
case 3: // invsrcclr
return 0xffffffff - *(u32*)srcClr;
case 4: // srcalpha
{
u8 alpha = srcClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 5: // invsrcalpha
{
u8 alpha = 0xff - srcClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 6: // dstalpha
{
u8 alpha = dstClr[ALP_C] & 0xff;
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
case 7: // invdstalpha
{
u8 alpha = 0xff - dstClr[ALP_C];
u32 factor = alpha << 24 | alpha << 16 | alpha << 8 | alpha;
return factor;
}
}
return 0;
}
void BlendColor(u8 *srcClr, u8 *dstClr)
{
u32 srcFactor = GetSourceFactor(srcClr, dstClr, bpmem.blendmode.srcfactor);
u32 dstFactor = GetDestinationFactor(srcClr, dstClr, bpmem.blendmode.dstfactor);
for (int i = 0; i < 4; i++)
{
// add MSB of factors to make their range 0 -> 256
u32 sf = (srcFactor & 0xff);
sf += sf >> 7;
u32 df = (dstFactor & 0xff);
df += df >> 7;
u32 color = (srcClr[i] * sf + dstClr[i] * df) >> 8;
dstClr[i] = (color>255)?255:color;
dstFactor >>= 8;
srcFactor >>= 8;
}
}
void LogicBlend(u32 srcClr, u32 &dstClr, int op)
{
switch (op)
{
case 0: // clear
dstClr = 0;
break;
case 1: // and
dstClr = srcClr & dstClr;
break;
case 2: // revand
dstClr = srcClr & (~dstClr);
break;
case 3: // copy
dstClr = srcClr;
break;
case 4: // invand
dstClr = (~srcClr) & dstClr;
break;
case 5: // noop
2012-12-30 10:32:37 +00:00
// Do nothing
break;
case 6: // xor
dstClr = srcClr ^ dstClr;
break;
case 7: // or
dstClr = srcClr | dstClr;
break;
case 8: // nor
dstClr = ~(srcClr | dstClr);
break;
case 9: // equiv
dstClr = ~(srcClr ^ dstClr);
break;
case 10: // inv
dstClr = ~dstClr;
break;
case 11: // revor
dstClr = srcClr | (~dstClr);
break;
case 12: // invcopy
dstClr = ~srcClr;
break;
case 13: // invor
dstClr = (~srcClr) | dstClr;
break;
case 14: // nand
dstClr = ~(srcClr & dstClr);
break;
case 15: // set
dstClr = 0xffffffff;
break;
}
}
void SubtractBlend(u8 *srcClr, u8 *dstClr)
{
for (int i = 0; i < 4; i++)
{
int c = (int)dstClr[i] - (int)srcClr[i];
dstClr[i] = (c < 0)?0:c;
}
}
void BlendTev(u16 x, u16 y, u8 *color)
{
u32 dstClr;
u32 offset = GetColorOffset(x, y);
u8 *dstClrPtr = (u8*)&dstClr;
GetPixelColor(offset, dstClrPtr);
if (bpmem.blendmode.blendenable)
{
if (bpmem.blendmode.subtract)
SubtractBlend(color, dstClrPtr);
else
BlendColor(color, dstClrPtr);
}
else if (bpmem.blendmode.logicopenable)
{
LogicBlend(*((u32*)color), dstClr, bpmem.blendmode.logicmode);
}
else
{
dstClrPtr = color;
}
if (bpmem.dstalpha.enable)
dstClrPtr[ALP_C] = bpmem.dstalpha.alpha;
if (bpmem.blendmode.colorupdate)
{
if (bpmem.blendmode.alphaupdate)
SetPixelAlphaColor(offset, dstClrPtr);
else
SetPixelColorOnly(offset, dstClrPtr);
}
else if (bpmem.blendmode.alphaupdate)
{
SetPixelAlphaOnly(offset, dstClrPtr[ALP_C]);
}
// branchless bounding box update
SWPixelEngine::pereg.boxLeft = SWPixelEngine::pereg.boxLeft>x?x:SWPixelEngine::pereg.boxLeft;
SWPixelEngine::pereg.boxRight = SWPixelEngine::pereg.boxRight<x?x:SWPixelEngine::pereg.boxRight;
SWPixelEngine::pereg.boxTop = SWPixelEngine::pereg.boxTop>y?y:SWPixelEngine::pereg.boxTop;
SWPixelEngine::pereg.boxBottom = SWPixelEngine::pereg.boxBottom<y?y:SWPixelEngine::pereg.boxBottom;
}
void SetColor(u16 x, u16 y, u8 *color)
{
u32 offset = GetColorOffset(x, y);
if (bpmem.blendmode.colorupdate)
{
if (bpmem.blendmode.alphaupdate)
SetPixelAlphaColor(offset, color);
else
SetPixelColorOnly(offset, color);
}
else if (bpmem.blendmode.alphaupdate)
{
SetPixelAlphaOnly(offset, color[ALP_C]);
}
}
void SetDepth(u16 x, u16 y, u32 depth)
{
if (bpmem.zmode.updateenable)
SetPixelDepth(GetDepthOffset(x, y), depth);
}
void GetColor(u16 x, u16 y, u8 *color)
{
u32 offset = GetColorOffset(x, y);
GetPixelColor(offset, color);
}
// For internal used only, return a non-normalized value, which saves work later.
void GetColorYUV(u16 x, u16 y, yuv444 *out)
{
u8 color[4];
GetColor(x, y, color);
// GameCube/Wii uses the BT.601 standard algorithm for converting to YCbCr; see
// http://www.equasys.de/colorconversion.html#YCbCr-RGBColorFormatConversion
out->Y = (u8)( 0.257f * color[RED_C] + 0.504f * color[GRN_C] + 0.098f * color[BLU_C]);
out->U = (u8)(-0.148f * color[RED_C] + -0.291f * color[GRN_C] + 0.439f * color[BLU_C]);
out->V = (u8)( 0.439f * color[RED_C] + -0.368f * color[GRN_C] + -0.071f * color[BLU_C]);
}
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 CopyToXFB(yuv422_packed* xfb_in_ram, u32 fbWidth, u32 fbHeight, const EFBRectangle& sourceRc, float Gamma) {
// FIXME: We should do Gamma correction
if (!xfb_in_ram)
{
WARN_LOG(VIDEO, "Tried to copy to invalid XFB address");
return;
}
int left = sourceRc.left;
int right = sourceRc.right;
// 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];
// our internal yuv444 type is not normalized, so black is {0, 0, 0} instead of {16, 128, 128}
yuv444 black;
black.Y = 0;
black.U = 0;
black.V = 0;
scanline[0] = black; // black border at start
scanline[right+1] = black; // black border at end
for (u16 y = sourceRc.top; y < sourceRc.bottom; y++)
{
// Get a scanline of YUV pixels in 4:4:4 format
for (int i = 1, x = left; x < right; i++, x++)
{
GetColorYUV(x, y, &scanline[i]);
}
// And Downsample them to 4:2:2
for (int i = 1, x = left; x < right; i+=2, x+=2)
{
// YU pixel
xfb_in_ram[x].Y = scanline[i].Y + 16;
// we mix our color difrences 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]
xfb_in_ram[x].UV = 128 + ((scanline[i-1].U + (scanline[i].U << 1) + scanline[i+1].U) >> 2);
// YV pixel
xfb_in_ram[x+1].Y = scanline[i+1].Y + 16;
// V[i] = 1/4 * V[i-1] + 1/2 * V[i] + 1/4 * V[i+1]
xfb_in_ram[x+1].UV = 128 + ((scanline[i].V + (scanline[i+1].V << 1) + scanline[i+2].V) >> 2);
}
xfb_in_ram += fbWidth;
}
}
// Like CopyToXFB, but we copy directly into the opengl colour texture without going via Gamecube main memory or doing a yuyv conversion
void BypassXFB(u8* texture, u32 fbWidth, u32 fbHeight, const EFBRectangle& sourceRc, float Gamma) {
if (fbWidth*fbHeight > 640*568) {
ERROR_LOG(VIDEO, "Framebuffer is too large: %ix%i", fbWidth, fbHeight);
return;
}
u32 color;
u8* colorPtr = (u8*)&color;
u32* texturePtr = (u32*)texture;
u32 textureAddress = 0;
int left = sourceRc.left;
int right = sourceRc.right;
for (u16 y = sourceRc.top; y < sourceRc.bottom; y++)
{
for (u16 x = left; x < right; x++)
{
GetColor(x, y, colorPtr);
texturePtr[textureAddress++] = Common::swap32(color);
}
}
}
bool ZCompare(u16 x, u16 y, u32 z)
{
u32 offset = GetDepthOffset(x, y);
u32 depth = GetPixelDepth(offset);
bool pass;
switch (bpmem.zmode.func)
{
case COMPARE_NEVER:
pass = false;
break;
case COMPARE_LESS:
pass = z < depth;
break;
case COMPARE_EQUAL:
pass = z == depth;
break;
case COMPARE_LEQUAL:
pass = z <= depth;
break;
case COMPARE_GREATER:
pass = z > depth;
break;
case COMPARE_NEQUAL:
pass = z != depth;
break;
case COMPARE_GEQUAL:
pass = z >= depth;
break;
case COMPARE_ALWAYS:
pass = true;
break;
default:
pass = false;
ERROR_LOG(VIDEO, "Bad Z compare mode %i", bpmem.zmode.func);
}
if (pass && bpmem.zmode.updateenable)
{
SetPixelDepth(offset, z);
}
return pass;
}
}