diff options
Diffstat (limited to 'render_sdl.c')
| -rw-r--r-- | render_sdl.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/render_sdl.c b/render_sdl.c index e164b6c..6fc59ec 100644 --- a/render_sdl.c +++ b/render_sdl.c @@ -147,6 +147,8 @@ void render_init(int width, int height, char * title, uint32_t fps) SDL_PauseAudio(0); } +uint16_t blankbuf[320*240]; + void render_context(vdp_context * context) { uint8_t *buf_8; @@ -166,13 +168,15 @@ void render_context(vdp_context * context) } else { repeat_y = repeat_x; } + int othermask = repeat_y >> 1; + uint16_t *otherbuf = (context->regs[REG_MODE_4] & BIT_INTERLACE) ? context->evenbuf : blankbuf; switch (screen->format->BytesPerPixel) { case 2: buf_16 = (uint16_t *)screen->pixels; for (int y = 0; y < 240; y++) { for (int i = 0; i < repeat_y; i++,buf_16 += screen->pitch/2) { uint16_t *line = buf_16; - uint16_t *src_line = context->framebuf + y * 320; + uint16_t *src_line = (i & othermask ? otherbuf : context->oddbuf) + y * 320; for (int x = 0; x < 320; x++) { uint16_t color = color_map[*(src_line++) & 0xFFF]; for (int j = 0; j < repeat_x; j++) { @@ -188,7 +192,7 @@ void render_context(vdp_context * context) for (int i = 0; i < repeat_y; i++,buf_8 += screen->pitch) { uint8_t *line = buf_8; for (int x = 0; x < 320; x++) { - uint16_t gen_color = context->framebuf[y * 320 + x]; + uint16_t gen_color = context->oddbuf[y * 320 + x]; b = ((gen_color >> 8) & 0xE) * 18; g = ((gen_color >> 4) & 0xE) * 18; r = (gen_color& 0xE) * 18; @@ -208,7 +212,7 @@ void render_context(vdp_context * context) for (int y = 0; y < 240; y++) { for (int i = 0; i < repeat_y; i++,buf_32 += screen->pitch/4) { uint32_t *line = buf_32; - uint16_t *src_line = context->framebuf + y * 320; + uint16_t *src_line = (i & othermask ? otherbuf : context->oddbuf) + y * 320; for (int x = 0; x < 320; x++) { uint32_t color; if (!render_dbg) { @@ -222,7 +226,7 @@ void render_context(vdp_context * context) color = color_map[context->cram[ (debug_pal << 4) | (context->vdpmem[(x/8)*32 + (y/8)*32*40 + (x%8)/2 + (y%8)*4] >> 4) ]]; } }else { - uint16_t gen_color = context->framebuf[y * 320 + x]; + uint16_t gen_color = context->oddbuf[y * 320 + x]; r = g = b = 0; switch(gen_color & FBUF_SRC_MASK) { @@ -271,6 +275,10 @@ void render_context(vdp_context * context) SDL_UnlockSurface(screen); } SDL_UpdateRect(screen, 0, 0, screen->clip_rect.w, screen->clip_rect.h); + if (context->regs[REG_MODE_4] & BIT_INTERLACE) + { + context->framebuf = context->framebuf == context->oddbuf ? context->evenbuf : context->oddbuf; + } } void render_wait_quit(vdp_context * context) |