diff options
| author | Mike Pavone <pavone@retrodev.com> | 2013-04-22 19:39:38 -0700 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2013-04-22 19:39:38 -0700 |
| commit | 36806a6d81dac87836542b3793be491d05b6c85c (patch) | |
| tree | b61395b2c3adede84e520f402584714aa99cb60d /vdp.c | |
| parent | 343579c0fa45a83b23f8d4cda54b309283046ef1 (diff) | |
Implemented shadow hilight mode.
Diffstat (limited to 'vdp.c')
| -rw-r--r-- | vdp.c | 110 |
1 files changed, 86 insertions, 24 deletions
@@ -14,6 +14,8 @@ #define BIT_DMA_ENABLE 0x4 #define BIT_H40 0x1 +#define BIT_HILIGHT 0x8 + #define SCROLL_BUFFER_SIZE 32 #define SCROLL_BUFFER_DRAW 16 @@ -516,31 +518,91 @@ void render_map_output(uint32_t line, int32_t col, vdp_context * context) end = dst + 16; uint16_t src; //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); - for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { - uint8_t pixel; - if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { - pixel = *sprite_buf; - src = FBUF_SRC_S; - } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { - pixel = *plane_a; - src = a_src; - } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { - pixel = *plane_b; - src = FBUF_SRC_B; - } else if (*sprite_buf & 0xF) { - pixel = *sprite_buf; - src = FBUF_SRC_S; - } else if (*plane_a & 0xF) { - pixel = *plane_a; - src = a_src; - } else if (*plane_b & 0xF){ - pixel = *plane_b; - src = FBUF_SRC_B; - } else { - pixel = context->regs[REG_BG_COLOR] & 0x3F; - src = FBUF_SRC_BG; + + if (context->regs[REG_MODE_4] & BIT_HILIGHT) { + for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { + uint8_t pixel; + + src = 0; + uint8_t sprite_color = *sprite_buf & 0x3F; + if (sprite_color == 0x3E || sprite_color == 0x3F) { + if (sprite_color == 0x3E) { + src |= FBUF_SHADOW; + } else { + src |= FBUF_HILIGHT; + } + if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { + pixel = *plane_a; + src |= a_src; + } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { + pixel = *plane_b; + src |= FBUF_SRC_B; + } else if (*plane_a & 0xF) { + pixel = *plane_a; + src |= a_src; + } else if (*plane_b & 0xF){ + pixel = *plane_b; + src |= FBUF_SRC_B; + } else { + pixel = context->regs[REG_BG_COLOR] & 0x3F; + src |= FBUF_SRC_BG; + } + } else { + if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { + pixel = *sprite_buf; + src = FBUF_SRC_S; + } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { + pixel = *plane_a; + src = a_src; + } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { + pixel = *plane_b; + src = FBUF_SRC_B; + } else if (*sprite_buf & 0xF) { + pixel = *sprite_buf; + src = FBUF_SRC_S; + if (*sprite_buf & 0xF != 0xE) { + src |= FBUF_SHADOW; + } + } else if (*plane_a & 0xF) { + pixel = *plane_a; + src = a_src | FBUF_SHADOW; + } else if (*plane_b & 0xF){ + pixel = *plane_b; + src = FBUF_SRC_B | FBUF_SHADOW; + } else { + pixel = context->regs[REG_BG_COLOR] & 0x3F; + src = FBUF_SRC_BG | FBUF_SHADOW; + } + } + *dst = (context->cram[pixel & 0x3F] & 0xEEE) | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; + } + } else { + for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { + uint8_t pixel; + if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { + pixel = *sprite_buf; + src = FBUF_SRC_S; + } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { + pixel = *plane_a; + src = a_src; + } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { + pixel = *plane_b; + src = FBUF_SRC_B; + } else if (*sprite_buf & 0xF) { + pixel = *sprite_buf; + src = FBUF_SRC_S; + } else if (*plane_a & 0xF) { + pixel = *plane_a; + src = a_src; + } else if (*plane_b & 0xF){ + pixel = *plane_b; + src = FBUF_SRC_B; + } else { + pixel = context->regs[REG_BG_COLOR] & 0x3F; + src = FBUF_SRC_BG; + } + *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; } - *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; } } else { //dst = context->framebuf + line * 320; |