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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;
int prev_pix_format = -1;
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 ©fmt, 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 (1)
- If the actual EFB format is PIXELFMT_RGBA6_Z24, we are using more bits per channel than the native HW (2)
- When doing a z copy EFB copy target format GX_TF_Z24X8 , the native HW don't worry about hthe color efb format because it only uses the depth part
- When changing EFB formats the efb must be cleared (3)
- Possible other oddities should be noted here as well
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!
- in a dition to the previus make sure we always return 0xFF in alpha when reading the efb content if the efb format has no alpha
- Same for color channels, these need to be cleared to 0x00 though.
(2)
- just scale down the RGBA8 color to RGBA6 and upscale it to RGBA8 again
(3) - when the pixel format changes:
- call ClearScreen using the correct alpha format for the previus pixel format
*/
void ClearScreen(const BPCmd &bp, const EFBRectangle &rc)
{
UPE_Copy PE_copy = bpmem.triggerEFBCopy;
bool colorEnable = bpmem.blendmode.colorupdate;
bool alphaEnable = bpmem.blendmode.alphaupdate;
bool zEnable = bpmem.zmode.updateenable;
u32 color = (bpmem.clearcolorAR << 16) | bpmem.clearcolorGB;
u32 z = bpmem.clearZValue;
if(prev_pix_format == -1)
{
prev_pix_format = bpmem.zcontrol.pixel_format;
}
// (1): Disable unused color channels
switch (bpmem.zcontrol.pixel_format)
{
case PIXELFMT_RGB8_Z24:
case PIXELFMT_RGB565_Z16:
alphaEnable = true;
color |= (prev_pix_format == PIXELFMT_RGBA6_Z24)? 0x0 : 0xFF000000;//(3)
break;
case PIXELFMT_Z24:
alphaEnable = colorEnable = false;
break;
default:
break;
}
if (colorEnable || alphaEnable || zEnable)
{
if (bpmem.zcontrol.pixel_format == PIXELFMT_RGBA6_Z24)
{
color = RGBA8ToRGBA6ToRGBA8(color);
}
else if (bpmem.zcontrol.pixel_format == PIXELFMT_RGB565_Z16)
{
color = RGBA8ToRGB565ToRGB8(color);
}
g_renderer->ClearScreen(rc, colorEnable, alphaEnable, zEnable, color, z);
}
prev_pix_format = bpmem.zcontrol.pixel_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
}
};
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