Code: Select all
void* fbp0 = getStaticVramBuffer(BUF_WIDTH,SCR_HEIGHT,GU_PSM_8888);
void* fbp1 = getStaticVramBuffer(BUF_WIDTH,SCR_HEIGHT,GU_PSM_8888);
void* zbp = getStaticVramBuffer(BUF_WIDTH,SCR_HEIGHT,GU_PSM_4444);Gu inistialisation
Gu inistialisation
I see sometimes in pspgu initialisation this lines:
what's their function?
They do exactly that they are named.
They allocate memory in the vram so the GU can use it as a buffer.
They allocate memory in the vram so the GU can use it as a buffer.
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int main(){
SetupCallbacks();
makeNiceGame();
sceKernelExitGame();
}When you watch the sources of those functions:
samples/gu/common/vram.c
you will see what they does.
As you can see it just keeps track of the used memory in the vram.
If you don't use those functions you will also use vram because the pointers are relative to the vram base.
samples/gu/common/vram.c
you will see what they does.
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static unsigned int staticOffset = 0;
static unsigned int getMemorySize(unsigned int width, unsigned int height, unsigned int psm)
{
switch (psm)
{
case GU_PSM_T4:
return (width * height) >> 1;
case GU_PSM_T8:
return width * height;
case GU_PSM_5650:
case GU_PSM_5551:
case GU_PSM_4444:
case GU_PSM_T16:
return 2 * width * height;
case GU_PSM_8888:
case GU_PSM_T32:
return 4 * width * height;
default:
return 0;
}
}
void* getStaticVramBuffer(unsigned int width, unsigned int height, unsigned int psm)
{
unsigned int memSize = getMemorySize(width,height,psm);
void* result = (void*)staticOffset;
staticOffset += memSize;
return result;
}If you don't use those functions you will also use vram because the pointers are relative to the vram base.
Code: Select all
int main(){
SetupCallbacks();
makeNiceGame();
sceKernelExitGame();
}