Mercurial > repos > blastem
diff vdp.c @ 2700:1cfd000dc750 default tip
WIP display screen border in plane debugger
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 29 Jun 2025 23:38:56 -0700 |
| parents | 46dba737b931 |
| children |
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--- a/vdp.c Fri Jun 27 23:39:37 2025 -0700 +++ b/vdp.c Sun Jun 29 23:38:56 2025 -0700 @@ -2460,6 +2460,134 @@ } } } + if (context->debug_flags & DEBUG_FLAG_PLANE_BORDER) { + pixel_t border_line = render_map_color(255, 0, 255); + if ((context->debug_modes[DEBUG_PLANE] & 3) < 2) { + uint16_t hscroll_base = (context->regs[REG_HSCROLL] & 0x3F) << 10; + hscroll_base += (context->debug_modes[DEBUG_PLANE] & 1) * 2; + uint16_t hscroll_mask = 0; + if (context->regs[REG_MODE_3] & 0x2) { + hscroll_mask |= 0xF8; + } + if (context->regs[REG_MODE_3] & 0x1) { + hscroll_mask |= 0x7; + } + uint16_t hscroll = 1023 - (context->vdpmem[hscroll_base] << 8 | context->vdpmem[hscroll_base+1]) & 1023; + uint16_t width = (context->regs[REG_MODE_4] & BIT_H40) ? 320 : 256; + if (context->regs[REG_MODE_3] & BIT_VSCROLL) { + //2-column vscroll + uint16_t num_cols = width >> 4; + for (int y_off = -2; y_off; y_off++) + { + for (uint16_t col = 0; col < num_cols; col++) + { + uint16_t vscroll = context->vsram[col * 2 + (context->debug_modes[DEBUG_PLANE] & 1)] & 1023; + int y = (vscroll + y_off) & 1023; + pixel_t *line = fb + y * pitch / sizeof(pixel_t); + for (int x = col ? hscroll + col * 16 : hscroll - 2, x_end = col == num_cols-1 ? hscroll + width + 2 : x + (col ? 16 : 18); x < x_end; x++) + { + line[x & 1023] = border_line; + } + } + } + for (int y = context->vsram[context->debug_modes[DEBUG_PLANE] & 1], y_end = y + context->inactive_start; y < y_end; y++) + { + pixel_t *line = fb + (y & 1023) * pitch / sizeof(pixel_t); + line[(hscroll - 2) & 1023] = border_line; + line[(hscroll - 1) & 1023] = border_line; + uint16_t hscroll_addr = hscroll_base + ((y - (y_end - context->inactive_start)) & hscroll_mask) * 4; + hscroll = 1024 - (context->vdpmem[hscroll_addr] << 8 | context->vdpmem[hscroll_addr+1]) & 1023; + } + for (int y = context->vsram[19 * 2 + (context->debug_modes[DEBUG_PLANE] & 1)], y_end = y + context->inactive_start; y < y_end; y++) + { + pixel_t *line = fb + (y & 1023) * pitch / sizeof(pixel_t); + line[(hscroll + width) & 1023] = border_line; + line[(hscroll + width + 1) & 1023] = border_line; + uint16_t hscroll_addr = hscroll_base + ((y - (y_end - context->inactive_start)) & hscroll_mask) * 4; + hscroll = 1024 - (context->vdpmem[hscroll_addr] << 8 | context->vdpmem[hscroll_addr+1]) & 1023; + } + for (int y_off = context->inactive_start; y_off < context->inactive_start + 2; y_off++) + { + for (uint16_t col = 0; col < num_cols; col++) + { + uint16_t vscroll = context->vsram[col * 2 + (context->debug_modes[DEBUG_PLANE] & 1)] & 1023; + int y = (vscroll + y_off) & 1023; + pixel_t *line = fb + y * pitch / sizeof(pixel_t); + for (int x = col ? hscroll + col * 16 : hscroll - 2, x_end = col == num_cols-1 ? hscroll + width + 2 : x + (col ? 16 : 18); x < x_end; x++) + { + line[x & 1023] = border_line; + } + } + } + } else { + //full screen vscroll + uint16_t vscroll = context->vsram[context->debug_modes[DEBUG_PLANE] & 1] & 1023; + int y = (vscroll - 2) & 1023; + pixel_t *line = fb + y * pitch / sizeof(pixel_t); + for (int x = hscroll - 2, x_end = hscroll + width + 2; x < x_end; x++) + { + line[x & 1023] = border_line; + } + y = (y + 1) & 1023; + line = fb + y * pitch / sizeof(pixel_t); + for (int x = hscroll - 1, x_end = hscroll + width + 1; x < x_end; x++) + { + line[x & 1023] = border_line; + } + int y_end = y + context->inactive_start + 1; + for (y++; y < y_end; y++) + { + line = fb + (y & 1023) * pitch / sizeof(pixel_t); + line[(hscroll - 2) & 1023] = border_line; + line[(hscroll - 1) & 1023] = border_line; + line[(hscroll + width) & 1023] = border_line; + line[(hscroll + width + 1) & 1023] = border_line; + uint16_t hscroll_last = hscroll; + uint16_t hscroll_addr = hscroll_base + ((y - vscroll) & hscroll_mask) * 4; + hscroll = 1024 - (context->vdpmem[hscroll_addr] << 8 | context->vdpmem[hscroll_addr+1]) & 1023; + if (abs(hscroll - hscroll_last) > 512) { + //handle wraparound + if (hscroll > hscroll_last) { + hscroll_last += 1024; + } else { + hscroll += 1024; + } + } + if (hscroll_last < hscroll) { + for (int x = hscroll_last + width + 2, x_end = hscroll + width; x < x_end; x++) + { + line[x & 1023] = border_line; + } + line = fb + ((y+1) & 1023) * pitch / sizeof(pixel_t); + for (int x = hscroll_last, x_end = hscroll; x < x_end; x++) + { + line[x & 1023] = border_line; + } + } else if (hscroll_last > hscroll) { + for (int x = hscroll, x_end = hscroll_last; x < x_end; x++) + { + line[x & 1023] = border_line; + } + line = fb + ((y+1) & 1023) * pitch / sizeof(pixel_t); + for (int x = hscroll + width + 2, x_end = hscroll_last + width; x < x_end; x++) + { + line[x & 1023] = border_line; + } + } + } + line = fb + (y_end & 1023) * pitch / sizeof(pixel_t); + for (int x = hscroll - 2, x_end = hscroll + width + 2; x < x_end; x++) + { + line[x & 1023] = border_line; + } + line = fb + ((y_end + 1) & 1023) * pitch / sizeof(pixel_t); + for (int x = hscroll - 2, x_end = hscroll + width + 2; x < x_end; x++) + { + line[x & 1023] = border_line; + } + } + } + } } static void sprite_debug_mode5(pixel_t *fb, uint32_t pitch, vdp_context *context)