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(MESS) svga_s3: Added bitblt function.

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mahlemiut 2012-08-27 07:25:41 +00:00
parent 5e7f308739
commit a0ac41719a
1 changed files with 54 additions and 6 deletions
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60
src/emu/video/pc_vga.c
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@ -191,7 +191,8 @@ enum
S3_IDLE = 0,
S3_DRAWING_RECT,
S3_DRAWING_LINE,
S3_DRAWING_BITBLT
S3_DRAWING_BITBLT,
S3_DRAWING_PATTERN
};
static struct
@ -2841,9 +2842,11 @@ WRITE16_HANDLER(s3_cmd_w)
{
if(s3.enable_8514 != 0)
{
int x,y;
int x,y,count;
int dir_x;
UINT32 offset;
UINT32 offset,src;
UINT8* buffer; // for bitblt operations
s3.current_cmd = data;
switch(data & 0xe000)
{
@ -2873,16 +2876,59 @@ WRITE16_HANDLER(s3_cmd_w)
{
for(x=0;x<=s3.rect_width;x+=dir_x)
{
vga.memory[(offset+x) % vga.svga_intf.vram_size] = s3.fgcolour & 0x000000ff; // TODO: handle 16-bit or 32-bit transfers
vga.memory[(offset+x) % vga.svga_intf.vram_size] = s3.fgcolour & 0x000000ff;
vga.memory[(offset+x+1) % vga.svga_intf.vram_size] = (s3.fgcolour & 0x0000ff00) >> 8;
}
offset += VGA_LINE_LENGTH;
}
logerror("S3: Command (%04x) - Rectangle Fill %i,%i Width: %i Height: %i Colour: %08x\n",s3.current_cmd,s3.curr_x,s3.curr_y,s3.rect_width,s3.rect_height,s3.fgcolour);
s3.gpbusy = false;
logerror("S3: Command (%04x) - Rectangle Fill %i,%i Width: %i Height: %i Colour: %08x\n",s3.current_cmd,s3.curr_x,
s3.curr_y,s3.rect_width,s3.rect_height,s3.fgcolour);
break;
case 0xc000: // BitBLT
offset = VGA_START_ADDRESS;
offset += (VGA_LINE_LENGTH * s3.dest_y);
offset += s3.dest_x;
src = VGA_START_ADDRESS;
src += (VGA_LINE_LENGTH * s3.curr_y);
src += s3.curr_x;
buffer = (UINT8*)malloc((s3.rect_height+1)*(s3.rect_width+1));
count = 0;
// copy to temporary buffer
for(y=0;y<=s3.rect_height;y++)
{
for(x=0;x<=s3.rect_width;x++)
{
if(data & 0x0020)
buffer[count++] = vga.memory[(src+x) % vga.svga_intf.vram_size];
else
buffer[count++] = vga.memory[(src-x) % vga.svga_intf.vram_size];
}
if(data & 0x0080)
src += VGA_LINE_LENGTH;
else
src -= VGA_LINE_LENGTH;
}
// write from buffer to screen
count = 0;
for(y=0;y<=s3.rect_height;y++)
{
for(x=0;x<=s3.rect_width;x++)
{
if(data & 0x0020)
vga.memory[(offset+x) % vga.svga_intf.vram_size] = buffer[count++];
else
vga.memory[(offset-x) % vga.svga_intf.vram_size] = buffer[count++];
}
if(data & 0x0080)
offset += VGA_LINE_LENGTH;
else
offset -= VGA_LINE_LENGTH;
}
free(buffer);
s3.gpbusy = false;
logerror("S3: Command (%04x) - BitBLT\n",s3.current_cmd);
logerror("S3: Command (%04x) - BitBLT from %i,%i to %i,%i Width: %i Height: %i\n",s3.current_cmd,
s3.curr_x,s3.curr_y,s3.dest_x,s3.dest_y,s3.rect_width,s3.rect_height);
break;
case 0xe000: // Pattern Fill
s3.gpbusy = false;
@ -2974,6 +3020,7 @@ READ16_HANDLER(s3_currentx_r)
WRITE16_HANDLER(s3_currentx_w)
{
s3.curr_x = data & 0x0fff;
logerror("S3: Current X set to %04x\n",data);
}
READ16_HANDLER(s3_currenty_r)
@ -2984,6 +3031,7 @@ READ16_HANDLER(s3_currenty_r)
WRITE16_HANDLER(s3_currenty_w)
{
s3.curr_y = data & 0x0fff;
logerror("S3: Current Y set to %04x\n",data);
}
READ16_HANDLER(s3_fgcolour_r)