dolphin/Source/Core/VideoCommon/Src/BPFunctions.cpp

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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "BPFunctions.h"
#include "Common.h"
#include "RenderBase.h"
#include "TextureCacheBase.h"
#include "VertexManagerBase.h"
#include "VertexShaderManager.h"
#include "VideoConfig.h"
bool textureChanged[8];
const bool renderFog = false;
namespace BPFunctions
{
// ----------------------------------------------
// State translation lookup tables
// Reference: Yet Another Gamecube Documentation
// ----------------------------------------------
void FlushPipeline()
{
VertexManager::Flush();
}
void SetGenerationMode(const BPCmd &bp)
{
g_renderer->SetGenerationMode();
}
void SetScissor(const BPCmd &bp)
{
g_renderer->SetScissorRect();
}
void SetLineWidth(const BPCmd &bp)
{
g_renderer->SetLineWidth();
}
void SetDepthMode(const BPCmd &bp)
{
g_renderer->SetDepthMode();
}
void SetBlendMode(const BPCmd &bp)
{
g_renderer->SetBlendMode(false);
}
void SetDitherMode(const BPCmd &bp)
{
g_renderer->SetDitherMode();
}
void SetLogicOpMode(const BPCmd &bp)
{
g_renderer->SetLogicOpMode();
}
void SetColorMask(const BPCmd &bp)
{
g_renderer->SetColorMask();
}
void CopyEFB(const BPCmd &bp, const EFBRectangle &rc, const u32 &address, const bool &fromZBuffer, const bool &isIntensityFmt, const u32 &copyfmt, const int &scaleByHalf)
{
// bpmem.zcontrol.pixel_format to PIXELFMT_Z24 is when the game wants to copy from ZBuffer (Zbuffer uses 24-bit Format)
if (g_ActiveConfig.bEFBCopyEnable)
{
TextureCache::CopyRenderTargetToTexture(address, fromZBuffer, isIntensityFmt, copyfmt, !!scaleByHalf, rc);
}
}
/* Explanation of the magic behind ClearScreen:
There's numerous possible formats for the pixel data in the EFB.
However, in the HW accelerated plugins we're always using RGBA8
for the EFB format, which causes some problems:
- We're using an alpha channel although the game doesn't
- If the actual EFB format is RGBA6_Z24 or R5G6B5_Z16, we are using more bits per channel than the native HW
To properly emulate the above points, we're doing the following:
(1)
- disable alpha channel writing of any kind of rendering if the actual EFB format doesn't use an alpha channel
- NOTE: Always make sure that the EFB has been cleared to an alpha value of 0xFF in this case!
- Same for color channels, these need to be cleared to 0x00 though.
(2)
- convert the RGBA8 color to RGBA6/RGB8/RGB565 and convert it to RGBA8 again
- convert the Z24 depth value to Z16 and back to Z24
*/
void ClearScreen(const BPCmd &bp, const EFBRectangle &rc)
{
bool colorEnable = bpmem.blendmode.colorupdate;
bool alphaEnable = bpmem.blendmode.alphaupdate;
bool zEnable = bpmem.zmode.updateenable;
// (1): Disable unused color channels
if (bpmem.zcontrol.pixel_format == PIXELFMT_RGB8_Z24 ||
bpmem.zcontrol.pixel_format == PIXELFMT_RGB565_Z16 ||
bpmem.zcontrol.pixel_format == PIXELFMT_Z24)
{
alphaEnable = false;
}
if (colorEnable || alphaEnable || zEnable)
{
u32 color = (bpmem.clearcolorAR << 16) | bpmem.clearcolorGB;
u32 z = bpmem.clearZValue;
// (2) drop additional accuracy
if (bpmem.zcontrol.pixel_format == PIXELFMT_RGBA6_Z24)
{
color = RGBA8ToRGBA6ToRGBA8(color);
}
else if (bpmem.zcontrol.pixel_format == PIXELFMT_RGB565_Z16)
{
color = RGBA8ToRGB565ToRGBA8(color);
z = Z24ToZ16ToZ24(z);
}
g_renderer->ClearScreen(rc, colorEnable, alphaEnable, zEnable, color, z);
}
}
void OnPixelFormatChange(const BPCmd &bp)
{
int convtype = -1;
/*
* When changing the EFB format, the pixel data won't get converted to the new format but stays the same.
* Since we are always using an RGBA8 buffer though, this causes issues in some games.
* Thus, we reinterpret the old EFB data with the new format here.
*/
if (!g_ActiveConfig.bEFBEmulateFormatChanges ||
!g_ActiveConfig.backend_info.bSupportsFormatReinterpretation)
return;
unsigned int new_format = bpmem.zcontrol.pixel_format;
unsigned int old_format = Renderer::GetPrevPixelFormat();
// no need to reinterpret pixel data in these cases
if (new_format == old_format || old_format == (unsigned int)-1)
goto skip;
switch (old_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_Z24:
// Z24 and RGB8_Z24 are treated equal, so just return in this case
if (new_format == PIXELFMT_RGB8_Z24 || new_format == PIXELFMT_Z24)
goto skip;
if (new_format == PIXELFMT_RGBA6_Z24)
convtype = 0;
else if (new_format == PIXELFMT_RGB565_Z16)
convtype = 1;
break;
case PIXELFMT_RGBA6_Z24:
if (new_format == PIXELFMT_RGB8_Z24 ||
new_format == PIXELFMT_Z24)
convtype = 2;
else if (new_format == PIXELFMT_RGB565_Z16)
convtype = 3;
break;
case PIXELFMT_RGB565_Z16:
if (new_format == PIXELFMT_RGB8_Z24 ||
new_format == PIXELFMT_Z24)
convtype = 4;
else if (new_format == PIXELFMT_RGB565_Z16)
convtype = 5;
break;
default:
break;
}
if (convtype == -1)
{
PanicAlert("Unhandled EFB format change: %d to %d\n", old_format, new_format);
goto skip;
}
g_renderer->ReinterpretPixelData(convtype);
skip:
Renderer::StorePixelFormat(new_format);
}
void RestoreRenderState(const BPCmd &bp)
{
g_renderer->RestoreAPIState();
}
bool GetConfig(const int &type)
{
switch (type)
{
case CONFIG_ISWII:
return g_VideoInitialize.bWii;
case CONFIG_DISABLEFOG:
return g_ActiveConfig.bDisableFog;
case CONFIG_SHOWEFBREGIONS:
return false;
default:
PanicAlert("GetConfig Error: Unknown Config Type!");
return false;
}
}
u8 *GetPointer(const u32 &address)
{
return g_VideoInitialize.pGetMemoryPointer(address);
}
void SetTextureMode(const BPCmd &bp)
{
g_renderer->SetSamplerState(bp.address & 3, (bp.address & 0xE0) == 0xA0);
}
void SetInterlacingMode(const BPCmd &bp)
{
// TODO
}
};