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Display tweaks, add vbGetPixels()

This commit is contained in:
Guy Perfect 2024-10-16 16:53:33 -05:00
parent 448658430c
commit eecc55bbd7
3 changed files with 76 additions and 8 deletions
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40
core/vb.c
View File

@ -279,6 +279,46 @@ VBAPI vbOnFrame vbGetFrameCallback(VB *sim) {
return sim->onFrame;
}
/* Retrieve the most recent frame image pixels */
VBAPI void vbGetPixels(VB *sim, void *left, int leftStrideX, int leftStrideY,
void *right, int rightStrideX, int rightStrideY) {
uint8_t *dest; /* Output data */
int offset; /* Horizontal offset of output pixel */
uint8_t *src; /* Source data */
int xStride; /* Bytes between output pixels */
int yStride; /* Bytes between output lines */
int i, x, y; /* Iterators */
/* Process both eyes */
for (i = 0; i < 2; i++) {
/* Working variables for left image */
if (i == 0) {
dest = left;
xStride = leftStrideX;
yStride = leftStrideY;
}
/* Working variables for right image */
else {
dest = right;
xStride = rightStrideX;
yStride = rightStrideY;
}
/* Nothing to do */
if (dest == NULL)
continue;
/* Transfer pixels to the destination */
src = sim->vip.frames[sim->vip.dp.buffer][i];
for (y = 0; y < 224; y++, dest += yStride)
for (x = offset = 0; x < 384; x++, offset += xStride)
dest[offset] = *src++;
}
}
/* Retrieve the value of the program counter */
VBAPI uint32_t vbGetProgramCounter(VB *sim) {
return sim->cpu.pc;

1
core/vb.h
View File

@ -107,6 +107,7 @@ VBAPI vbOnException vbGetExceptionCallback(VB *sim);
VBAPI vbOnExecute vbGetExecuteCallback (VB *sim);
VBAPI vbOnFetch vbGetFetchCallback (VB *sim);
VBAPI vbOnFrame vbGetFrameCallback (VB *sim);
VBAPI void vbGetPixels (VB *sim, void *left, int leftStrideX, int leftStrideY, void *right, int rightStrideX, int rightStrideY);
VBAPI uint32_t vbGetProgramCounter (VB *sim);
VBAPI int32_t vbGetProgramRegister (VB *sim, int index);
VBAPI vbOnRead vbGetReadCallback (VB *sim);

43
core/vip.c
View File

@ -44,13 +44,26 @@ static void vipThrow(VB *sim, uint16_t cause) {
/* Transfer one column of frame buffer pixels to output */
static void vipTransferColumn(VB *sim, int32_t eye) {
int32_t bits; /* Pixel bits from frame buffer */
int y, z; /* Iterators */
int32_t bits; /* Pixel bits from frame buffer */
uint8_t *dest; /* Host frame image output */
uint8_t *src; /* Simulation frame buffer input */
int y, z; /* Iterators */
/* Select source and destination addresses in host memory */
uint8_t *dest = &sim->vip.frames
/* Select destination address in host memory */
dest = &sim->vip.frames
[sim->vip.dp.buffer][eye][sim->vip.dp.column];
uint8_t *src = &sim->vip.ram[
/* Output is disabled */
if ((sim->vip.dp.disp & sim->vip.dp.synce) == 0) {
for (z = 0; z < 0x15000; z += 4) {
busWriteBuffer(dest, VB_S32, 0);
dest += 4;
}
return;
}
/* Select source address in host memory */
src = &sim->vip.ram[
eye << 16 |
sim->vip.dp.buffer << 15 |
sim->vip.dp.column << 6
@ -363,9 +376,9 @@ static int vipOnFrame(VB *sim) {
/***************************** Library Functions *****************************/
/***************************** Display Processor *****************************/
/* Display processor */
/* Process sub-component */
static int vipEmulateDisplay(VB *sim, uint32_t clocks) {
/* Process all clocks */
@ -474,10 +487,24 @@ static int vipEmulateDisplay(VB *sim, uint32_t clocks) {
return 0;
}
/****************************** Pixel Processor ******************************/
/* Process sub-component */
static void vipEmulateDrawing(VB *sim, uint32_t clocks) {
(void) sim;
(void) clocks;
}
/***************************** Library Functions *****************************/
/* Process component */
static int vipEmulate(VB *sim, uint32_t clocks) {
int brk = vipEmulateDisplay(sim, clocks);
/*vipEmulateDrawing(sim, clocks);*/
vipEmulateDrawing(sim, clocks);
return brk;
}