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sms vdp, fix TMS modes, tile count off by one

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This commit is contained in:
kub 2023-02-18 17:19:05 +00:00
parent c989b8fec1
commit ecf8764253
1 changed files with 8 additions and 8 deletions
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16
pico/mode4.c
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@ -529,7 +529,7 @@ static void DrawSpritesTMS(void)
static void DrawStripM1(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty) static void DrawStripM1(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty)
{ {
// Draw tiles across screen: // Draw tiles across screen:
for (; cells_dx > 0; cells_dx += 6, tilex_ty++, cells_dx -= 0x10000) for (; cells_dx >= 0; cells_dx += 6, tilex_ty++, cells_dx -= 0x10000)
{ {
unsigned int pack, pal; unsigned int pack, pal;
unsigned code; unsigned code;
@ -560,7 +560,7 @@ static void DrawDisplayM1(int scanline)
pattab += (scanline & 0x7); pattab += (scanline & 0x7);
tilex = cellskip & 0x1f; tilex = cellskip & 0x1f;
cells = maxcells - cellskip; cells = maxcells - cellskip - 1;
dx = 8 + (cellskip << 3) + line_offset; dx = 8 + (cellskip << 3) + line_offset;
// tiles // tiles
@ -576,7 +576,7 @@ static void DrawDisplayM1(int scanline)
static void DrawStripM2(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty) static void DrawStripM2(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty)
{ {
// Draw tiles across screen: // Draw tiles across screen:
for (; cells_dx > 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000) for (; cells_dx >= 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000)
{ {
unsigned int pal; unsigned int pal;
unsigned code; unsigned code;
@ -606,7 +606,7 @@ static void DrawDisplayM2(int scanline)
pattab += (scanline>>2) & 0x7; pattab += (scanline>>2) & 0x7;
tilex = cellskip & 0x1f; tilex = cellskip & 0x1f;
cells = maxcells - cellskip; cells = maxcells - cellskip - 1;
dx = (cellskip << 3) + line_offset; dx = (cellskip << 3) + line_offset;
// tiles // tiles
@ -626,7 +626,7 @@ static void DrawDisplayM2(int scanline)
static void DrawStripM3(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty) static void DrawStripM3(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty)
{ {
// Draw tiles across screen: // Draw tiles across screen:
for (; cells_dx > 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000) for (; cells_dx >= 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000)
{ {
unsigned int pack, pal; unsigned int pack, pal;
unsigned code; unsigned code;
@ -657,7 +657,7 @@ static void DrawDisplayM3(int scanline)
pattab += ((scanline>>6) <<11) + (scanline & 0x7); pattab += ((scanline>>6) <<11) + (scanline & 0x7);
tilex = cellskip & 0x1f; tilex = cellskip & 0x1f;
cells = maxcells - cellskip; cells = maxcells - cellskip - 1;
dx = (cellskip << 3) + line_offset; dx = (cellskip << 3) + line_offset;
// tiles // tiles
@ -677,7 +677,7 @@ static void DrawDisplayM3(int scanline)
static void DrawStripM0(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty) static void DrawStripM0(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty)
{ {
// Draw tiles across screen: // Draw tiles across screen:
for (; cells_dx > 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000) for (; cells_dx >= 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000)
{ {
unsigned int pack, pal; unsigned int pack, pal;
unsigned code; unsigned code;
@ -707,7 +707,7 @@ static void DrawDisplayM0(int scanline)
pattab += (scanline & 0x7); pattab += (scanline & 0x7);
tilex = cellskip & 0x1f; tilex = cellskip & 0x1f;
cells = maxcells - cellskip; cells = maxcells - cellskip - 1;
dx = (cellskip << 3) + line_offset; dx = (cellskip << 3) + line_offset;
// tiles // tiles