piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2025-07-23 06:10:03 -06:00
Code Issues Packages Projects Releases Wiki Activity

split framebuffer.

Browse Source 
setup doublebuffering inside GPU.cpp.
avoid copying a whole framebuffer every frame. better performance at higher res.
This commit is contained in:
Arisotura
2019-05-12 15:01:40 +02:00
parent 939a376389
commit c88981b589
4 changed files with 91 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

94
src/GPU.cpp
View File

@ -71,9 +71,9 @@ u32 VRAMMap_TexPal[8];
u32 VRAMMap_ARM7[2];
u32* Framebuffer;
int FBScale;
int FBScreenStride;
int FrontBuffer;
u32* Framebuffer[2][2];
int FBScale[2];
GPU2D* GPU2D_A;
GPU2D* GPU2D_B;
@ -85,8 +85,12 @@ bool Init()
GPU2D_B = new GPU2D(1);
if (!GPU3D::Init()) return false;
FrontBuffer = 0;
Framebuffer[0][0] = NULL; Framebuffer[0][1] = NULL;
Framebuffer[1][0] = NULL; Framebuffer[1][1] = NULL;
FBScale[0] = -1; FBScale[1] = -1;
//SetFramebufferScale(1);
SetFramebufferScale(2);
SetFramebufferScale(1, 1);
return true;
}
@ -97,7 +101,10 @@ void DeInit()
delete GPU2D_B;
GPU3D::DeInit();
if (Framebuffer) delete[] Framebuffer;
if (Framebuffer[0][0]) delete[] Framebuffer[0][0];
if (Framebuffer[0][1]) delete[] Framebuffer[0][1];
if (Framebuffer[1][0]) delete[] Framebuffer[1][0];
if (Framebuffer[1][1]) delete[] Framebuffer[1][1];
}
void Reset()
@ -145,22 +152,32 @@ void Reset()
VRAMMap_ARM7[0] = 0;
VRAMMap_ARM7[1] = 0;
for (int i = 0; i < 256*192*2; i++)
for (int i = 0; i < (256*192)<<(FBScale[0]*2); i++)
{
Framebuffer[i] = 0xFFFFFFFF;
Framebuffer[0][0][i] = 0xFFFFFFFF;
Framebuffer[1][0][i] = 0xFFFFFFFF;
}
for (int i = 0; i < (256*192)<<(FBScale[1]*2); i++)
{
Framebuffer[0][1][i] = 0xFFFFFFFF;
Framebuffer[1][1][i] = 0xFFFFFFFF;
}
GPU2D_A->Reset();
GPU2D_B->Reset();
GPU3D::Reset();
GPU2D_A->SetFramebuffer(&Framebuffer[FBScreenStride]);
GPU2D_B->SetFramebuffer(&Framebuffer[0]);
int backbuf = FrontBuffer ? 0 : 1;
GPU2D_A->SetFramebuffer(Framebuffer[backbuf][1]);
GPU2D_B->SetFramebuffer(Framebuffer[backbuf][0]);
}
void Stop()
{
memset(Framebuffer, 0, FBScreenStride*2*sizeof(u32));
memset(Framebuffer[0][0], 0, (256*192)<<(FBScale[0]*2));
memset(Framebuffer[0][1], 0, (256*192)<<(FBScale[1]*2));
memset(Framebuffer[1][0], 0, (256*192)<<(FBScale[0]*2));
memset(Framebuffer[1][1], 0, (256*192)<<(FBScale[1]*2));
}
void DoSavestate(Savestate* file)
@ -215,13 +232,46 @@ void DoSavestate(Savestate* file)
GPU3D::DoSavestate(file);
}
void SetFramebufferScale(int scale)
void AssignFramebuffers()
{
FBScale = scale;
FBScreenStride = (256*scale) * (192*scale);
int backbuf = FrontBuffer ? 0 : 1;
if (NDS::PowerControl9 & (1<<15))
{
GPU2D_A->SetFramebuffer(Framebuffer[backbuf][0]);
GPU2D_B->SetFramebuffer(Framebuffer[backbuf][1]);
}
else
{
GPU2D_A->SetFramebuffer(Framebuffer[backbuf][1]);
GPU2D_B->SetFramebuffer(Framebuffer[backbuf][0]);
}
}
if (Framebuffer) delete[] Framebuffer;
Framebuffer = new u32[FBScreenStride * 2];
void SetFramebufferScale(int top, int bottom)
{
if (top != FBScale[0])
{
FBScale[0] = top;
int fbsize = (256 * 192) << (FBScale[0] * 2);
if (Framebuffer[0][0]) delete[] Framebuffer[0][0];
if (Framebuffer[1][0]) delete[] Framebuffer[1][0];
Framebuffer[0][0] = new u32[fbsize];
Framebuffer[1][0] = new u32[fbsize];
}
if (bottom != FBScale[1])
{
FBScale[1] = bottom;
int fbsize = (256 * 192) << (FBScale[1] * 2);
if (Framebuffer[0][1]) delete[] Framebuffer[0][1];
if (Framebuffer[1][1]) delete[] Framebuffer[1][1];
Framebuffer[0][1] = new u32[fbsize];
Framebuffer[1][1] = new u32[fbsize];
}
AssignFramebuffers();
}
@ -682,16 +732,7 @@ void SetPowerCnt(u32 val)
GPU2D_B->SetEnabled(val & (1<<9));
GPU3D::SetEnabled(val & (1<<3), val & (1<<2));
if (val & (1<<15))
{
GPU2D_A->SetFramebuffer(&Framebuffer[0]);
GPU2D_B->SetFramebuffer(&Framebuffer[FBScreenStride]);
}
else
{
GPU2D_A->SetFramebuffer(&Framebuffer[FBScreenStride]);
GPU2D_B->SetFramebuffer(&Framebuffer[0]);
}
AssignFramebuffers();
}
@ -762,6 +803,9 @@ void StartHBlank(u32 line)
void FinishFrame(u32 lines)
{
FrontBuffer = FrontBuffer ? 0 : 1;
AssignFramebuffers();
TotalScanlines = lines;
}