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trident: added XOR drawing, added XNEG and YNEG reverse directions for mono pattern BitBLT.

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This commit is contained in:
mahlemiut 2014-09-23 07:44:52 +00:00
parent 03a6c85577
commit 77621a9438
2 changed files with 40 additions and 5 deletions
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44
src/emu/bus/isa/trident.c
View File

@ -50,13 +50,17 @@ UINT32 trident_vga_device::READPIXEL32(INT16 x, INT16 y)
void trident_vga_device::WRITEPIXEL8(INT16 x, INT16 y, UINT8 data)
{
if((x & 0xfff)<tri.accel_dest_x_clip && (y & 0xfff)<tri.accel_dest_y_clip)
{
data = handle_rop(data,READPIXEL8(x,y)) & 0xff;
vga.memory[((y & 0xfff)*offset() + (x & 0xfff)) % vga.svga_intf.vram_size] = data;
}
}
void trident_vga_device::WRITEPIXEL15(INT16 x, INT16 y, UINT16 data)
{
if((x & 0xfff)<tri.accel_dest_x_clip && (y & 0xfff)<tri.accel_dest_y_clip)
{
data = handle_rop(data,READPIXEL8(x,y)) & 0x7fff;
vga.memory[((y & 0xfff)*offset() + (x & 0xfff)*2) % vga.svga_intf.vram_size] = data & 0x00ff;
vga.memory[((y & 0xfff)*offset() + ((x & 0xfff)*2)+1) % vga.svga_intf.vram_size] = (data & 0x7f00) >> 8;
}
@ -66,6 +70,7 @@ void trident_vga_device::WRITEPIXEL16(INT16 x, INT16 y, UINT16 data)
{
if((x & 0xfff)<tri.accel_dest_x_clip && (y & 0xfff)<tri.accel_dest_y_clip)
{
data = handle_rop(data,READPIXEL8(x,y)) & 0xffff;
vga.memory[((y & 0xfff)*offset() + (x & 0xfff)*2) % vga.svga_intf.vram_size] = data & 0x00ff;
vga.memory[((y & 0xfff)*offset() + ((x & 0xfff)*2)+1) % vga.svga_intf.vram_size] = (data & 0xff00) >> 8;
}
@ -75,6 +80,7 @@ void trident_vga_device::WRITEPIXEL32(INT16 x, INT16 y, UINT32 data)
{
if((x & 0xfff)<tri.accel_dest_x_clip && (y & 0xfff)<tri.accel_dest_y_clip)
{
data = handle_rop(data,READPIXEL8(x,y));
vga.memory[((y & 0xfff)*offset() + (x & 0xfff)*4) % vga.svga_intf.vram_size] = data & 0x000000ff;
vga.memory[((y & 0xfff)*offset() + ((x & 0xfff)*4)+1) % vga.svga_intf.vram_size] = (data & 0x0000ff00) >> 8;
vga.memory[((y & 0xfff)*offset() + ((x & 0xfff)*4)+2) % vga.svga_intf.vram_size] = (data & 0x00ff0000) >> 16;
@ -82,6 +88,27 @@ void trident_vga_device::WRITEPIXEL32(INT16 x, INT16 y, UINT32 data)
}
}
UINT32 trident_vga_device::handle_rop(UINT32 src, UINT32 dst)
{
switch(tri.accel_fmix) // TODO: better understand this register
{
case 0xf0: // PAT
case 0xcc: // SRC
break; // pass data through
case 0x00: // 0
src = 0;
break;
case 0xff: // 1
src = 0xffffffff;
break;
case 0x66: // XOR
case 0x5a: // XOR PAT
src = dst ^ src;
break;
}
return src;
}
UINT32 trident_vga_device::READPIXEL(INT16 x,INT16 y)
{
if(svga.rgb8_en)
@ -1168,22 +1195,29 @@ void trident_vga_device::accel_line()
// feed data written to VRAM to an active BitBLT command
void trident_vga_device::accel_data_write(UINT32 data)
{
int xdir = 1,ydir = 1;
if(tri.accel_drawflags & 0x0200) // XNEG
xdir = -1;
if(tri.accel_drawflags & 0x0100) // YNEG
ydir = -1;
for(int x=31;x>=0;x--)
{
if(tri.accel_mem_x <= tri.accel_dest_x+tri.accel_dim_x)
if(tri.accel_mem_x <= tri.accel_dest_x+tri.accel_dim_x && tri.accel_mem_x >= tri.accel_dest_x-tri.accel_dim_x)
{
if(((data >> x) & 0x01) != 0)
WRITEPIXEL(tri.accel_mem_x,tri.accel_mem_y,tri.accel_fgcolour);
else
WRITEPIXEL(tri.accel_mem_x,tri.accel_mem_y,tri.accel_bgcolour);
}
tri.accel_mem_x++;
tri.accel_mem_x+=xdir;
}
if(tri.accel_mem_x > tri.accel_dest_x+tri.accel_dim_x)
if(tri.accel_mem_x > tri.accel_dest_x+tri.accel_dim_x || tri.accel_mem_x < tri.accel_dest_x-tri.accel_dim_x)
{
tri.accel_mem_x = tri.accel_dest_x;
tri.accel_mem_y++;
if(tri.accel_mem_y > tri.accel_dest_y+tri.accel_dim_y)
tri.accel_mem_y+=ydir;
if(tri.accel_mem_y > tri.accel_dest_y+tri.accel_dim_y || tri.accel_mem_y < tri.accel_dest_y-tri.accel_dim_y)
tri.accel_memwrite_active = false; // completed
}
}

1
src/emu/bus/isa/trident.h
View File

@ -115,6 +115,7 @@ private:
void WRITEPIXEL32(INT16 x, INT16 y, UINT32 data);
UINT32 READPIXEL(INT16 x,INT16 y);
void WRITEPIXEL(INT16 x,INT16 y, UINT32 data);
UINT32 handle_rop(UINT32 src, UINT32 dst);
};