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new 32x renderers, auto fskip change, massive refactoring
[picodrive.git] / pico / 32x / draw.c
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974fdb5b 1#include "../pico_int.h"
2
5a681086 3int (*PicoScan32xBegin)(unsigned int num);
4int (*PicoScan32xEnd)(unsigned int num);
5int Pico32xDrawMode;
6
5e49c3a8 7static void convert_pal555(int invert_prio)
974fdb5b 8{
9 unsigned int *ps = (void *)Pico32xMem->pal;
10 unsigned int *pd = (void *)Pico32xMem->pal_native;
11 unsigned int m1 = 0x001f001f;
12 unsigned int m2 = 0x03e003e0;
13 unsigned int m3 = 0xfc00fc00;
5e49c3a8 14 unsigned int inv = 0;
974fdb5b 15 int i;
16
5e49c3a8 17 if (invert_prio)
18 inv = 0x00200020;
19
974fdb5b 20 // place prio to LS green bit
21 for (i = 0x100/2; i > 0; i--, ps++, pd++) {
22 unsigned int t = *ps;
5e49c3a8 23 *pd = (((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10)) ^ inv;
974fdb5b 24 }
25
26 Pico32x.dirty_pal = 0;
27}
28
5a681086 29// direct color mode
30#define do_line_dc(pd, p32x, pmd, inv, pmd_draw_code) \
31{ \
32 const unsigned int m1 = 0x001f; \
33 const unsigned int m2 = 0x03e0; \
34 const unsigned int m3 = 0x7c00; \
35 int i; \
36 \
37 for (i = 320; i > 0; i--, pd++, p32x++, pmd++) { \
38 unsigned short t = *p32x; \
39 if (*pmd != mdbg && !((t ^ inv) & 0x8000)) { \
40 pmd_draw_code; \
41 continue; \
42 } \
43 \
44 *pd = ((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10); \
45 } \
46}
47
48// packed pixel mode
49#define do_line_pp(pd, p32x, pmd, pmd_draw_code) \
50{ \
51 unsigned short t; \
52 int i; \
53 for (i = 320/2; i > 0; i--, p32x++) { \
54 t = pal[*p32x >> 8]; \
55 if (*pmd == mdbg || (t & 0x20)) \
56 *pd = t; \
57 else \
58 pmd_draw_code; \
59 pd++; pmd++; \
60 t = pal[*p32x & 0xff]; \
61 if (*pmd == mdbg || (t & 0x20)) \
62 *pd = t; \
63 else \
64 pmd_draw_code; \
65 pd++; pmd++; \
66 } \
67}
68
69// run length mode
70#define do_line_rl(pd, p32x, pmd, pmd_draw_code) \
71{ \
72 unsigned short len, t; \
73 int i; \
74 for (i = 320; i > 0; p32x++) { \
75 t = pal[*p32x & 0xff]; \
76 for (len = (*p32x >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pmd++) { \
77 if (*pmd == mdbg || (t & 0x20)) \
78 *pd = t; \
79 else \
80 pmd_draw_code; \
81 } \
82 } \
83}
84
974fdb5b 85void FinalizeLine32xRGB555(int sh, int line)
86{
87 unsigned short *pd = DrawLineDest;
88 unsigned short *pal = Pico32xMem->pal_native;
5a681086 89 unsigned char *pmd = HighCol + 8;
90 unsigned short *dram, *p32x;
91 unsigned char mdbg;
974fdb5b 92
5a681086 93 FinalizeLine555(sh, line);
c987bb5c 94
5a681086 95 if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0 || // 32x blanking
96 // XXX: how is 32col mode hadled by real hardware?
97 !(Pico.video.reg[12] & 1) || // 32col mode
98 !(PicoDrawMask & PDRAW_32X_ON))
99 {
5e49c3a8 100 return;
5a681086 101 }
5e49c3a8 102
266c6afa 103 dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
5a681086 104 p32x = dram + dram[line];
105 mdbg = Pico.video.reg[7] & 0x3f;
266c6afa 106
107 if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode
5a681086 108 int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0;
109 do_line_dc(pd, p32x, pmd, inv_bit,);
266c6afa 110 return;
111 }
112
974fdb5b 113 if (Pico32x.dirty_pal)
5e49c3a8 114 convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
974fdb5b 115
266c6afa 116 if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode
5a681086 117 do_line_pp(pd, p32x, pmd,);
974fdb5b 118 }
266c6afa 119 else { // Run Length Mode
5a681086 120 do_line_rl(pd, p32x, pmd,);
121 }
122}
123
124#define MD_LAYER_CODE \
125 *dst = palmd[*pmd]
126
127#define PICOSCAN_PRE \
128 PicoScan32xBegin(l + (lines_offs & 0xff)); \
129 dst = DrawLineDest; \
130
131#define PICOSCAN_POST \
132 PicoScan32xEnd(l + (lines_offs & 0xff)); \
133
134#define make_do_loop(name, pre_code, post_code, md_code) \
135/* Direct Color Mode */ \
136static void do_loop_dc##name(unsigned short *dst, \
137 unsigned short *dram, int lines_offs, int mdbg) \
138{ \
139 int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; \
140 unsigned char *pmd = PicoDraw2FB + 328 * 8 + 8; \
141 unsigned short *palmd = HighPal; \
142 unsigned short *p32x; \
143 int lines = lines_offs >> 16; \
144 int l; \
145 (void)palmd; \
146 for (l = 0; l < lines; l++, pmd += 8) { \
147 pre_code; \
148 p32x = dram + dram[l]; \
149 do_line_dc(dst, p32x, pmd, inv_bit, md_code); \
150 post_code; \
151 } \
152} \
153 \
154/* Packed Pixel Mode */ \
155static void do_loop_pp##name(unsigned short *dst, \
156 unsigned short *dram, int lines_offs, int mdbg) \
157{ \
158 unsigned short *pal = Pico32xMem->pal_native; \
159 unsigned char *pmd = PicoDraw2FB + 328 * 8 + 8; \
160 unsigned short *palmd = HighPal; \
161 unsigned short *p32x; \
162 int lines = lines_offs >> 16; \
163 int l; \
164 (void)palmd; \
165 for (l = 0; l < lines; l++, pmd += 8) { \
166 pre_code; \
167 p32x = dram + dram[l]; \
168 do_line_pp(dst, p32x, pmd, md_code); \
169 post_code; \
170 } \
171} \
172 \
173/* Run Length Mode */ \
174static void do_loop_rl##name(unsigned short *dst, \
175 unsigned short *dram, int lines_offs, int mdbg) \
176{ \
177 unsigned short *pal = Pico32xMem->pal_native; \
178 unsigned char *pmd = PicoDraw2FB + 328 * 8 + 8; \
179 unsigned short *palmd = HighPal; \
180 unsigned short *p32x; \
181 int lines = lines_offs >> 16; \
182 int l; \
183 (void)palmd; \
184 for (l = 0; l < lines; l++, pmd += 8) { \
185 pre_code; \
186 p32x = dram + dram[l]; \
187 do_line_rl(dst, p32x, pmd, md_code); \
188 post_code; \
189 } \
190}
191
192#ifdef _ASM_32X_DRAW
193#undef make_do_loop
194#define make_do_loop(name, pre_code, post_code, md_code) \
195extern void do_loop_dc##name(unsigned short *dst, \
196 unsigned short *dram, int lines_offs, int mdbg); \
197extern void do_loop_pp##name(unsigned short *dst, \
198 unsigned short *dram, int lines_offs, int mdbg); \
199extern void do_loop_rl##name(unsigned short *dst, \
200 unsigned short *dram, int lines_offs, int mdbg);
201#endif
202
203make_do_loop(,,,)
204make_do_loop(_md, , , MD_LAYER_CODE)
205make_do_loop(_scan, PICOSCAN_PRE, PICOSCAN_POST, )
206make_do_loop(_scan_md, PICOSCAN_PRE, PICOSCAN_POST, MD_LAYER_CODE)
207
208typedef void (*do_loop_func)(unsigned short *dst, unsigned short *dram, int lines, int mdbg);
209enum { DO_LOOP, DO_LOOP_MD, DO_LOOP_SCAN, DO_LOOP_MD_SCAN };
210
211static const do_loop_func do_loop_dc_f[] = { do_loop_dc, do_loop_dc_md, do_loop_dc_scan, do_loop_dc_scan_md };
212static const do_loop_func do_loop_pp_f[] = { do_loop_pp, do_loop_pp_md, do_loop_pp_scan, do_loop_pp_scan_md };
213static const do_loop_func do_loop_rl_f[] = { do_loop_rl, do_loop_rl_md, do_loop_rl_scan, do_loop_rl_scan_md };
214
215void PicoDraw32xLayer(int offs, int lines, int md_bg)
216{
217 int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
218 const do_loop_func *do_loop;
219 unsigned short *dram;
220 int which_func;
221
222 DrawLineDest = DrawLineDestBase + offs * DrawLineDestIncrement;
223 dram = Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
224
225 if (Pico32xDrawMode == 2) {
226 if (Pico.m.dirtyPal)
227 PicoDrawUpdateHighPal();
228 }
229
230 if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2)
231 {
232 // Direct Color Mode
233 do_loop = do_loop_dc_f;
234 goto do_it;
235 }
236
237 if (Pico32x.dirty_pal)
238 convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
239
240 if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1)
241 {
242 // Packed Pixel Mode
243 do_loop = do_loop_pp_f;
244 }
245 else
246 {
247 // Run Length Mode
248 do_loop = do_loop_rl_f;
249 }
250
251do_it:
252 if (Pico32xDrawMode == 2)
253 which_func = have_scan ? DO_LOOP_MD_SCAN : DO_LOOP_MD;
254 else
255 which_func = have_scan ? DO_LOOP_SCAN : DO_LOOP;
256
257 do_loop[which_func](DrawLineDest, dram, (lines << 16) | offs, md_bg);
258}
259
260void PicoDraw32xSetFrameMode(int is_on, int only_32x)
261{
262#ifdef _ASM_32X_DRAW
263 extern void *Pico32xNativePal;
264 Pico32xNativePal = Pico32xMem->pal_native;
265#endif
266
267 if (is_on) {
268 // use the same layout as alt renderer
269 PicoDrawSetInternalBuf(PicoDraw2FB + 328*8, 328);
270 Pico32xDrawMode = only_32x ? 1 : 2;
271 } else {
272 PicoDrawSetInternalBuf(NULL, 0);
273 Pico32xDrawMode = 0;
266c6afa 274 }
974fdb5b 275}
276
fast MegaDrive/MegaCD/32X emulator