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Properly emulate the alpha read pixel engine register function (used for EFB peeks).

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6313 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
NeoBrainX
2010-10-24 19:52:52 +00:00
parent b71cd5f383
commit ab53c84dcf
5 changed files with 87 additions and 38 deletions
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54
Source/Plugins/Plugin_VideoDX11/Src/Render.cpp
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@ -28,6 +28,7 @@
#include "VideoConfig.h"
#include "main.h"
#include "VertexManager.h"
#include "PixelEngine.h"
#include "Render.h"
#include "OpcodeDecoding.h"
#include "BPStructs.h"
@ -614,6 +615,20 @@ void Renderer::SetColorMask()
D3D::gfxstate->SetRenderTargetWriteMask(color_mask);
}
// This function allows the CPU to directly access the EFB.
// There are EFB peeks (which will read the color or depth of a pixel)
// and EFB pokes (which will change the color or depth of a pixel).
//
// The behavior of EFB peeks can only be modified by:
// - GX_PokeAlphaRead
// The behavior of EFB pokes can be modified by:
// - GX_PokeAlphaMode (TODO)
// - GX_PokeAlphaUpdate (TODO)
// - GX_PokeBlendMode (TODO)
// - GX_PokeColorUpdate (TODO)
// - GX_PokeDither (TODO)
// - GX_PokeDstAlpha (TODO)
// - GX_PokeZMode (TODO)
u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
{
D3D11_MAPPED_SUBRESOURCE map;
@ -704,36 +719,29 @@ u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
D3D::context->Map(read_tex, 0, D3D11_MAP_READ, 0, &map);
u32 ret = *(u32*)map.pData;
D3D::context->Unmap(read_tex, 0);
return ret;
// check what to do with the alpha channel (GX_PokeAlphaRead)
PixelEngine::UPEAlphaReadReg alpha_read_mode;
PixelEngine::Read16((u16&)alpha_read_mode, PE_DSTALPHACONF);
if(alpha_read_mode.ReadMode == 2) return ret; // GX_READ_NONE
else if(alpha_read_mode.ReadMode == 1) return (ret | 0xFF000000); // GX_READ_FF
else /*if(alpha_read_mode.ReadMode == 0)*/ return (ret & 0x00FFFFFF); // GX_READ_00
}
else //if(type == POKE_COLOR)
{
// TODO: Speed this up by batching pokes?
// If we're only writing one pixel (native resolution), we can directly copy the data into the target. TODO: Check if this is faster than drawing quads
u32 rgbaColor = (poke_data & 0xFF00FF00) | ((poke_data >> 16) & 0xFF) | ((poke_data << 16) & 0xFF0000);
if(RectToLock.right <= RectToLock.left + 1 && RectToLock.bottom <= RectToLock.top + 1)
{
D3D::context->Map(g_framebufferManager.GetEFBColorStagingBuffer(), 0, D3D11_MAP_WRITE, 0, &map);
*(u32*)map.pData = rgbaColor;
D3D::context->Unmap(g_framebufferManager.GetEFBColorStagingBuffer(), 0);
D3D11_BOX box = CD3D11_BOX(0, 0, 0, 1, 1, 1);
D3D::context->CopySubresourceRegion(g_framebufferManager.GetEFBColorTexture()->GetTex(), 0, RectToLock.left, RectToLock.top, 0, g_framebufferManager.GetEFBColorStagingBuffer(), 0, &box);
return 0;
}
else
{
ResetAPIState(); // Reset any game specific settings
// TODO: The first five PE registers may change behavior of EFB pokes, this isn't implemented, yet.
ResetAPIState();
D3D::context->OMSetRenderTargets(1, &g_framebufferManager.GetEFBColorTexture()->GetRTV(), NULL);
D3D::drawColorQuad(rgbaColor, (float)RectToLock.left * 2.f / (float)Renderer::GetFullTargetWidth() - 1.f,
- (float)RectToLock.top * 2.f / (float)Renderer::GetFullTargetHeight() + 1.f,
(float)RectToLock.right * 2.f / (float)Renderer::GetFullTargetWidth() - 1.f,
- (float)RectToLock.bottom * 2.f / (float)Renderer::GetFullTargetHeight() + 1.f);
D3D::context->OMSetRenderTargets(1, &g_framebufferManager.GetEFBColorTexture()->GetRTV(), NULL);
D3D::drawColorQuad(rgbaColor, (float)RectToLock.left * 2.f / (float)Renderer::GetFullTargetWidth() - 1.f,
- (float)RectToLock.top * 2.f / (float)Renderer::GetFullTargetHeight() + 1.f,
(float)RectToLock.right * 2.f / (float)Renderer::GetFullTargetWidth() - 1.f,
- (float)RectToLock.bottom * 2.f / (float)Renderer::GetFullTargetHeight() + 1.f);
RestoreAPIState();
return 0;
}
RestoreAPIState();
return 0;
}
}