platform linux, display pad overlay and storyware pages for Pico

irixxxx · Mar 20, 2024 · e9f7e47 · e9f7e47
1 parent 0ef1674
commit e9f7e47
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Showing 3 changed files with 89 additions and 6 deletions.
diff --git a/pico/pico/pico.c b/pico/pico/pico.c
@@ -60,6 +60,5 @@ PICO_INTERNAL void PicoInitPico(void)
 
   PicoIn.AHW = PAHW_PICO;
   memset(&PicoPicohw, 0, sizeof(PicoPicohw));
-  PicoPicohw.pen_pos[0] = 0x03c + 320/2;
-  PicoPicohw.pen_pos[1] = 0x200 + 240/2;
+  PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
 }
diff --git a/platform/libpicofe b/platform/libpicofe
diff --git a/platform/linux/emu.c b/platform/linux/emu.c
@@ -11,6 +11,7 @@
 #include <sys/mman.h>
 
 #include "../libpicofe/menu.h"
+#include "../libpicofe/readpng.h"
 #include "../libpicofe/plat.h"
 #include "../common/emu.h"
 #include "../common/arm_utils.h"
@@ -92,9 +93,12 @@ static void draw_pico_ptr(void)
 	int pitch = g_screen_ppitch;
 	u16 *p = g_screen_ptr;
 	int x = pico_pen_x, y = pico_pen_y;
+	// storyware pages are actually squished, 2:1
+	u64 h = (pico_inp_mode == 1 ? 160 : out_h);
+	if (h < 224) y++;
 
 	x = (x * out_w * ((1ULL<<32) / 320 + 1)) >> 32;
-	y = (y * out_h * ((1ULL<<32) / 224 + 1)) >> 32;
+	y = (y *     h * ((1ULL<<32) / 224 + 1)) >> 32;
 	p += (screen_y+y)*pitch + (screen_x+x);
 
 	p[-pitch-1] ^= _; p[-pitch] ^= o; p[-pitch+1] ^= _;
@@ -172,6 +176,38 @@ void screen_blit(u16 *pd, int pp, u8* ps, int ss, u16 *pal)
 	upscale[currentConfig.filter & 0x3](pd, pp, ps, ss, out_w, out_h, pal);
 }
 
+static int pico_page;
+static u16 *pico_pagebuf;
+
+static const char *pic_exts[] = { "png", "PNG" };
+static char static_buff[512];
+
+char *find_pico_file()
+{
+	char *ext = strrchr(rom_fname_loaded, '.');
+	int extpos = ext ? ext-rom_fname_loaded : strlen(rom_fname_loaded);
+	int i;
+
+	strcpy(static_buff, rom_fname_loaded);
+	static_buff[extpos++] = '_';
+	if (pico_inp_mode == 2) {
+		static_buff[extpos++] = 'p';
+		static_buff[extpos++] = 'a';
+		static_buff[extpos++] = 'd';
+	} else
+		static_buff[extpos++] = '0'+PicoPicohw.page;
+	static_buff[extpos++] = '.';
+
+	for (i = 0; i < ARRAY_SIZE(pic_exts); i++) {
+		strcpy(static_buff+extpos, pic_exts[i]);
+		if (access(static_buff, R_OK) == 0) {
+			printf("found Pico file: %s\n", static_buff);
+			return static_buff;
+		}
+	}
+	return NULL;
+}
+
 void pemu_finalize_frame(const char *fps, const char *notice)
 {
 	if (!is_16bit_mode()) {
@@ -194,6 +230,7 @@ void pemu_finalize_frame(const char *fps, const char *notice)
 		u16 *ps = ghost_buf;
 		int y, h = currentConfig.vscaling == EOPT_SCALE_SW ? 240:out_h;
 		int w = currentConfig.scaling == EOPT_SCALE_SW ? 320:out_w;
+
 		if (currentConfig.ghosting == 1)
 			for (y = 0; y < h; y++) {
 				v_blend((u32 *)pd, (u32 *)ps, w/2, p_075_round);
@@ -208,8 +245,48 @@ void pemu_finalize_frame(const char *fps, const char *notice)
 			}
 	}
 
-	if ((PicoIn.AHW & PAHW_PICO) && (currentConfig.EmuOpt & EOPT_PICO_PEN))
-		if (pico_inp_mode) draw_pico_ptr();
+	if (PicoIn.AHW & PAHW_PICO) {
+		u16 *pd = screen_buffer(g_screen_ptr) +
+				out_y * g_screen_ppitch + out_x;
+		int y, h = currentConfig.vscaling == EOPT_SCALE_SW ? 240:out_h;
+		int w = currentConfig.scaling == EOPT_SCALE_SW ? 320:out_w;
+
+		if (pico_inp_mode == 1 && pico_page != PicoPicohw.page) {
+			char *fname = find_pico_file();
+			pico_pagebuf = realloc(pico_pagebuf, 320*160*2);
+			memset(pico_pagebuf, 0, 320*160*2);
+			if (!fname ||
+			    readpng(pico_pagebuf, fname, READPNG_SCALE, w, w/2)) {
+				if (pico_pagebuf)
+					free(pico_pagebuf);
+				pico_pagebuf = NULL;
+			} else {
+				pico_page = PicoPicohw.page;
+			}
+		}
+		if (pico_inp_mode == 2 && pico_page != -1) {
+			char *fname = find_pico_file();
+			pico_pagebuf = realloc(pico_pagebuf, 320*240*2);
+			memset(pico_pagebuf, 0, 320*240*2);
+			if (!fname ||
+			    readpng(pico_pagebuf, fname, READPNG_SCALE, w, h)) {
+				if (pico_pagebuf)
+					free(pico_pagebuf);
+				pico_pagebuf = NULL;
+			} else
+				pico_page = -1;
+		}
+		// copy image onto buffer
+		if (pico_inp_mode == 1 && pico_pagebuf)
+			for (y = 0; y < w/2; y++)
+				memcpy(pd + w*y, pico_pagebuf + w*y, w*2);
+		if (pico_inp_mode == 2 && pico_pagebuf)
+			for (y = 0; y < h; y++)
+				memcpy(pd + w*y, pico_pagebuf + w*y, w*2);
+
+		if (pico_inp_mode && (currentConfig.EmuOpt & EOPT_PICO_PEN))
+			draw_pico_ptr();
+	}
 	if (notice)
 		emu_osd_text16(4, g_screen_height - 8, notice);
 	if (currentConfig.EmuOpt & EOPT_SHOW_FPS)
@@ -446,6 +523,9 @@ void emu_video_mode_change(int start_line, int line_count, int start_col, int co
 		memset(ghost_buf, 0, w * h * 2);
 	}
 
+	free(pico_pagebuf);
+	pico_pagebuf = NULL;
+
 	// clear whole screen in all buffers
 	if (!is_16bit_mode())
 		memset32(Pico.est.Draw2FB, 0xe0e0e0e0, (320+8) * (8+240+8) / 4);
@@ -470,6 +550,10 @@ void pemu_loop_end(void)
 		free(ghost_buf);
 		ghost_buf = NULL;
 	}
+	if (pico_pagebuf) {
+		free(pico_pagebuf);
+		pico_pagebuf = NULL;
+	}
 }
 
 void plat_wait_till_us(unsigned int us_to)