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- /*
- * PicoDrive
- * (C) notaz, 2009,2010
- * (C) kub, 2019
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
- #include "../pico_int.h"
- // BGR555 to native conversion
- #if defined(USE_BGR555)
- #define PXCONV(t) ((t)&(mr|mg|mb|mp))
- #define PXPRIO 0x8000 // prio in MSB
- #elif defined(USE_BGR565)
- #define PXCONV(t) (((t)&mr) | (((t)&(mg|mb)) << 1) | (((t)&mp) >> 10))
- #define PXPRIO 0x0020 // prio in LS green bit
- #else // RGB565
- #define PXCONV(t) ((((t)&mr) << 11) | (((t)&mg) << 1) | (((t)&(mp|mb)) >> 10))
- #define PXPRIO 0x0020 // prio in LS green bit
- #endif
- int (*PicoScan32xBegin)(unsigned int num);
- int (*PicoScan32xEnd)(unsigned int num);
- int Pico32xDrawMode;
- void *DrawLineDestBase32x;
- int DrawLineDestIncrement32x;
- static void convert_pal555(int invert_prio)
- {
- u32 *ps = (void *)Pico32xMem->pal;
- u32 *pd = (void *)Pico32xMem->pal_native;
- u32 mr = 0x001f001f; // masks for red, green, blue, prio
- u32 mg = 0x03e003e0;
- u32 mb = 0x7c007c00;
- u32 mp = 0x80008000;
- u32 inv = 0;
- int i;
- if (invert_prio)
- inv = 0x80008000;
- for (i = 0x100/2; i > 0; i--, ps++, pd++) {
- u32 t = *ps ^ inv;
- *pd = PXCONV(t);
- }
- Pico32x.dirty_pal = 0;
- }
- // direct color mode
- #define do_line_dc(pd, p32x, pmd, inv, pmd_draw_code) \
- { \
- const u16 mr = 0x001f; \
- const u16 mg = 0x03e0; \
- const u16 mb = 0x7c00; \
- const u16 mp = 0x0000; \
- unsigned short t; \
- int i = 320; \
- \
- while (i > 0) { \
- for (; i > 0 && (*pmd & 0x3f) == mdbg; pd++, pmd++, i--) { \
- t = *p32x++; \
- *pd = PXCONV(t); \
- } \
- for (; i > 0 && (*pmd & 0x3f) != mdbg; pd++, pmd++, i--) { \
- t = *p32x++ ^ inv; \
- if (t & 0x8000) \
- *pd = PXCONV(t); \
- else \
- pmd_draw_code; \
- } \
- } \
- }
- // packed pixel mode
- #define do_line_pp(pd, p32x, pmd, pmd_draw_code) \
- { \
- unsigned short t; \
- int i = 320; \
- while (i > 0) { \
- for (; i > 0 && (*pmd & 0x3f) == mdbg; pd++, pmd++, i--) { \
- t = pal[*(unsigned char *)(MEM_BE2((uintptr_t)(p32x++)))]; \
- *pd = t; \
- } \
- for (; i > 0 && (*pmd & 0x3f) != mdbg; pd++, pmd++, i--) { \
- t = pal[*(unsigned char *)(MEM_BE2((uintptr_t)(p32x++)))]; \
- if (t & PXPRIO) \
- *pd = t; \
- else \
- pmd_draw_code; \
- } \
- } \
- }
- // run length mode
- #define do_line_rl(pd, p32x, pmd, pmd_draw_code) \
- { \
- unsigned short len, t; \
- int i; \
- for (i = 320; i > 0; p32x++) { \
- t = pal[*p32x & 0xff]; \
- for (len = (*p32x >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pmd++) { \
- if ((*pmd & 0x3f) == mdbg || (t & PXPRIO)) \
- *pd = t; \
- else \
- pmd_draw_code; \
- } \
- } \
- }
- // this is almost never used (Wiz and menu bg gen only)
- void FinalizeLine32xRGB555(int sh, int line, struct PicoEState *est)
- {
- unsigned short *pd = est->DrawLineDest;
- unsigned short *pal = Pico32xMem->pal_native;
- unsigned char *pmd = est->HighCol + 8;
- unsigned short *dram, *p32x;
- unsigned char mdbg;
- FinalizeLine555(sh, line, est);
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0 || // 32x blanking
- // XXX: how is 32col mode handled by real hardware?
- !(Pico.video.reg[12] & 1) || // 32col mode
- (Pico.video.debug_p & PVD_KILL_32X))
- {
- return;
- }
- dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
- p32x = dram + dram[line];
- mdbg = Pico.video.reg[7] & 0x3f;
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode
- int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0;
- do_line_dc(pd, p32x, pmd, inv_bit,);
- return;
- }
- if (Pico32x.dirty_pal)
- convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode
- unsigned char *p32xb = (void *)p32x;
- if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
- p32xb++;
- do_line_pp(pd, p32xb, pmd,);
- }
- else { // Run Length Mode
- do_line_rl(pd, p32x, pmd,);
- }
- }
- #define MD_LAYER_CODE \
- *dst = palmd[*pmd]
- #define PICOSCAN_PRE \
- PicoScan32xBegin(l + (lines_sft_offs & 0xff)); \
- dst = Pico.est.DrawLineDest; \
- #define PICOSCAN_POST \
- PicoScan32xEnd(l + (lines_sft_offs & 0xff)); \
- Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement32x; \
- #define make_do_loop(name, pre_code, post_code, md_code) \
- /* Direct Color Mode */ \
- static void do_loop_dc##name(unsigned short *dst, \
- unsigned short *dram, int lines_sft_offs, int mdbg) \
- { \
- int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; \
- unsigned char *pmd = Pico.est.Draw2FB + \
- 328 * (lines_sft_offs & 0xff) + 8; \
- unsigned short *palmd = Pico.est.HighPal; \
- unsigned short *p32x; \
- int lines = lines_sft_offs >> 16; \
- int l; \
- (void)palmd; \
- for (l = 0; l < lines; l++, pmd += 8) { \
- pre_code; \
- p32x = dram + dram[l]; \
- do_line_dc(dst, p32x, pmd, inv_bit, md_code); \
- post_code; \
- dst += DrawLineDestIncrement32x/2 - 320; \
- } \
- } \
- \
- /* Packed Pixel Mode */ \
- static void do_loop_pp##name(unsigned short *dst, \
- unsigned short *dram, int lines_sft_offs, int mdbg) \
- { \
- unsigned short *pal = Pico32xMem->pal_native; \
- unsigned char *pmd = Pico.est.Draw2FB + \
- 328 * (lines_sft_offs & 0xff) + 8; \
- unsigned short *palmd = Pico.est.HighPal; \
- unsigned char *p32x; \
- int lines = lines_sft_offs >> 16; \
- int l; \
- (void)palmd; \
- for (l = 0; l < lines; l++, pmd += 8) { \
- pre_code; \
- p32x = (void *)(dram + dram[l]); \
- p32x += (lines_sft_offs >> 8) & 1; \
- do_line_pp(dst, p32x, pmd, md_code); \
- post_code; \
- dst += DrawLineDestIncrement32x/2 - 320; \
- } \
- } \
- \
- /* Run Length Mode */ \
- static void do_loop_rl##name(unsigned short *dst, \
- unsigned short *dram, int lines_sft_offs, int mdbg) \
- { \
- unsigned short *pal = Pico32xMem->pal_native; \
- unsigned char *pmd = Pico.est.Draw2FB + \
- 328 * (lines_sft_offs & 0xff) + 8; \
- unsigned short *palmd = Pico.est.HighPal; \
- unsigned short *p32x; \
- int lines = lines_sft_offs >> 16; \
- int l; \
- (void)palmd; \
- for (l = 0; l < lines; l++, pmd += 8) { \
- pre_code; \
- p32x = dram + dram[l]; \
- do_line_rl(dst, p32x, pmd, md_code); \
- post_code; \
- dst += DrawLineDestIncrement32x/2 - 320; \
- } \
- }
- #ifdef _ASM_32X_DRAW
- #undef make_do_loop
- #define make_do_loop(name, pre_code, post_code, md_code) \
- extern void do_loop_dc##name(unsigned short *dst, \
- unsigned short *dram, int lines_offs, int mdbg); \
- extern void do_loop_pp##name(unsigned short *dst, \
- unsigned short *dram, int lines_offs, int mdbg); \
- extern void do_loop_rl##name(unsigned short *dst, \
- unsigned short *dram, int lines_offs, int mdbg);
- #endif
- make_do_loop(,,,)
- make_do_loop(_md, , , MD_LAYER_CODE)
- make_do_loop(_scan, PICOSCAN_PRE, PICOSCAN_POST, )
- make_do_loop(_scan_md, PICOSCAN_PRE, PICOSCAN_POST, MD_LAYER_CODE)
- typedef void (*do_loop_func)(unsigned short *dst, unsigned short *dram, int lines, int mdbg);
- enum { DO_LOOP, DO_LOOP_MD, DO_LOOP_SCAN, DO_LOOP_MD_SCAN };
- static const do_loop_func do_loop_dc_f[] = { do_loop_dc, do_loop_dc_md, do_loop_dc_scan, do_loop_dc_scan_md };
- static const do_loop_func do_loop_pp_f[] = { do_loop_pp, do_loop_pp_md, do_loop_pp_scan, do_loop_pp_scan_md };
- static const do_loop_func do_loop_rl_f[] = { do_loop_rl, do_loop_rl_md, do_loop_rl_scan, do_loop_rl_scan_md };
- void PicoDraw32xLayer(int offs, int lines, int md_bg)
- {
- int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
- const do_loop_func *do_loop;
- unsigned short *dram;
- int lines_sft_offs;
- int which_func;
- Pico.est.DrawLineDest = (char *)DrawLineDestBase32x + offs * DrawLineDestIncrement32x;
- Pico.est.DrawLineDestIncr = DrawLineDestIncrement32x;
- dram = Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
- if (Pico32xDrawMode == PDM32X_BOTH)
- PicoDrawUpdateHighPal();
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2)
- {
- // Direct Color Mode
- do_loop = do_loop_dc_f;
- goto do_it;
- }
- if (Pico32x.dirty_pal)
- convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1)
- {
- // Packed Pixel Mode
- do_loop = do_loop_pp_f;
- }
- else
- {
- // Run Length Mode
- do_loop = do_loop_rl_f;
- }
- do_it:
- if (Pico32xDrawMode == PDM32X_BOTH)
- which_func = have_scan ? DO_LOOP_MD_SCAN : DO_LOOP_MD;
- else
- which_func = have_scan ? DO_LOOP_SCAN : DO_LOOP;
- lines_sft_offs = (lines << 16) | offs;
- if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
- lines_sft_offs |= 1 << 8;
- do_loop[which_func](Pico.est.DrawLineDest, dram, lines_sft_offs, md_bg);
- }
- // mostly unused, games tend to keep 32X layer on
- void PicoDraw32xLayerMdOnly(int offs, int lines)
- {
- int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
- unsigned short *dst = (void *)((char *)DrawLineDestBase32x + offs * DrawLineDestIncrement32x);
- unsigned char *pmd = Pico.est.Draw2FB + 328 * offs + 8;
- unsigned short *pal = Pico.est.HighPal;
- int poffs = 0, plen = 320;
- int l, p;
- if (!(Pico.video.reg[12] & 1)) {
- // 32col mode. for some render modes MD pixel data carries an offset
- if (!(PicoIn.opt & POPT_DIS_32C_BORDER))
- pmd += 32;
- poffs = 32;
- plen = 256;
- }
- PicoDrawUpdateHighPal();
- dst += poffs;
- for (l = 0; l < lines; l++) {
- if (have_scan) {
- PicoScan32xBegin(l + offs);
- dst = (unsigned short *)Pico.est.DrawLineDest + poffs;
- }
- for (p = 0; p < plen; p += 4) {
- dst[p + 0] = pal[*pmd++];
- dst[p + 1] = pal[*pmd++];
- dst[p + 2] = pal[*pmd++];
- dst[p + 3] = pal[*pmd++];
- }
- dst = Pico.est.DrawLineDest = (char *)dst + DrawLineDestIncrement32x;
- pmd += 328 - plen;
- if (have_scan)
- PicoScan32xEnd(l + offs);
- }
- }
- void PicoDrawSetOutFormat32x(pdso_t which, int use_32x_line_mode)
- {
- if (which == PDF_RGB555) {
- // CLUT pixels needed as well, for layer priority
- PicoDrawSetInternalBuf(Pico.est.Draw2FB, 328);
- PicoDrawSetOutBufMD(NULL, 0);
- } else {
- // store CLUT pixels, same layout as alt renderer
- PicoDrawSetInternalBuf(NULL, 0);
- PicoDrawSetOutBufMD(Pico.est.Draw2FB, 328);
- }
- if (use_32x_line_mode)
- // we'll draw via FinalizeLine32xRGB555 (rare)
- Pico32xDrawMode = PDM32X_OFF;
- else
- // in RGB555 mode the 32x layer is drawn over the MD layer, in the other
- // modes 32x and MD layer are merged together by the 32x renderer
- Pico32xDrawMode = (which == PDF_RGB555) ? PDM32X_32X_ONLY : PDM32X_BOTH;
- }
- void PicoDrawSetOutBuf32X(void *dest, int increment)
- {
- DrawLineDestBase32x = dest;
- DrawLineDestIncrement32x = increment;
- // in RGB555 mode this buffer is also used by the MD renderer
- if (Pico32xDrawMode != PDM32X_BOTH)
- PicoDrawSetOutBufMD(DrawLineDestBase32x, DrawLineDestIncrement32x);
- }
- // vim:shiftwidth=2:ts=2:expandtab
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