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sms, basic gamegear support

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This commit is contained in:
kub 2021-10-13 21:30:54 +02:00
parent 0df7401c02
commit 466fa07953
16 changed files with 451 additions and 214 deletions
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35
platform/common/upscale.h
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@ -35,12 +35,20 @@
*/
#include <pico/pico_types.h>
/* LSB of all colors in a pixel */
#if defined(USE_BGR555)
#define PXLSB 0x0421
#else
#define PXLSB 0x0821
#endif
/* RGB565 pixel mixing, see https://www.compuphase.com/graphic/scale3.htm and
http://blargg.8bitalley.com/info/rgb_mixing.html */
/* 2-level mixing */
//#define p_05(d,p1,p2) d=(((p1)+(p2) + ( ((p1)^(p2))&0x0821))>>1) // round up
//#define p_05(d,p1,p2) d=(((p1)+(p2) - ( ((p1)^(p2))&0x0821))>>1) // round down
#define p_05(d,p1,p2) d=(((p1)&(p2)) + ((((p1)^(p2))&~0x0821)>>1))
//#define p_05(d,p1,p2) d=(((p1)+(p2) + ( ((p1)^(p2))&PXLSB))>>1) // round up
//#define p_05(d,p1,p2) d=(((p1)+(p2) - ( ((p1)^(p2))&PXLSB))>>1) // round down
#define p_05(d,p1,p2) d=(((p1)&(p2)) + ((((p1)^(p2))&~PXLSB)>>1))
/* 4-level mixing, 2 times slower */
// 1/4*p1 + 3/4*p2 = 1/2*(1/2*(p1+p2) + p2)
#define p_025(d,p1,p2) p_05(t, p1, p2); p_05( d, t, p2)
@ -322,6 +330,21 @@ scalers h:
si += ss - w; \
} while (0)
// reverse version for overlapping buffers
#define rh_upscale_nn_1_2(di,ds,si,ss,w,f) do { \
int i; \
di += w*2; \
si += w; \
for (i = w/2; i > 0; i--, si -= 2, di -= 4) { \
di[-1] = f(si[-1]); \
di[-2] = f(si[-1]); \
di[-3] = f(si[-2]); \
di[-4] = f(si[-2]); \
} \
di += ds; \
si += ss; \
} while (0)
#define h_upscale_bl2_1_2(di,ds,si,ss,w,f) do { \
int i; uint p = f(si[0]); \
for (i = w/2; i > 0; i--, si += 2, di += 4) { \
@ -514,11 +537,12 @@ scalers v:
} else { \
int j; \
l = 0; \
di -= 4*ds; \
di -= 3*ds; \
for (j = 0; j < 2; j++) { \
v_copy(&di[0], &di[-ds], w, f_nop); \
di += 2*ds; \
} \
di -= ds; \
} \
} while (0)
@ -528,11 +552,12 @@ scalers v:
} else { \
int j; \
l = 0; \
di -= 4*ds; \
di -= 3*ds; \
for (j = 0; j < 2; j++) { \
v_mix(&di[0], &di[-ds], &di[ds], w, p_05, f_nop); \
di += 2*ds; \
} \
di -= ds; \
} \
} while (0)