mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
298 lines
7.4 KiB
C
298 lines
7.4 KiB
C
/*
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* PicoDrive
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* (C) notaz, 2013
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*
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* This work is licensed under the terms of MAME license.
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* See COPYING file in the top-level directory.
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*/
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#include <stdio.h>
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#include "../libpicofe/input.h"
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#include "../libpicofe/plat.h"
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#include "../libpicofe/plat_sdl.h"
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#include "../libpicofe/in_sdl.h"
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#include "../libpicofe/gl.h"
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#include "emu.h"
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#include "menu_pico.h"
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#include "input_pico.h"
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#include "plat_sdl.h"
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#include "version.h"
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#include <pico/pico.h>
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static void *shadow_fb;
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static struct in_pdata in_sdl_platform_data = {
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.defbinds = in_sdl_defbinds,
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.key_map = in_sdl_key_map,
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.joy_map = in_sdl_joy_map,
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};
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/* YUV stuff */
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static int yuv_ry[32], yuv_gy[32], yuv_by[32];
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static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
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static unsigned char yuv_y[256];
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static struct uyvy { uint32_t y:8; uint32_t vyu:24; } yuv_uyvy[65536];
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void bgr_to_uyvy_init(void)
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{
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int i, v;
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/* init yuv converter:
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y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
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y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
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u = (int)(8 * 0.565f * (b0 - y0)) + 128;
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v = (int)(8 * 0.713f * (r0 - y0)) + 128;
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*/
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for (i = 0; i < 32; i++) {
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yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
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yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
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yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
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}
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for (i = -32; i < 32; i++) {
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v = (int)(8 * 0.565f * i) + 128;
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if (v < 0)
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v = 0;
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if (v > 255)
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v = 255;
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yuv_u[i + 32] = v;
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v = (int)(8 * 0.713f * i) + 128;
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if (v < 0)
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v = 0;
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if (v > 255)
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v = 255;
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yuv_v[i + 32] = v;
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}
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// valid Y range seems to be 16..235
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for (i = 0; i < 256; i++) {
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yuv_y[i] = 16 + 219 * i / 32;
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}
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// everything combined into one large array for speed
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for (i = 0; i < 65536; i++) {
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int r = (i >> 11) & 0x1f, g = (i >> 6) & 0x1f, b = (i >> 0) & 0x1f;
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int y = (yuv_ry[r] + yuv_gy[g] + yuv_by[b]) >> 16;
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yuv_uyvy[i].y = yuv_y[y];
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yuv_uyvy[i].vyu = (yuv_v[r-y + 32] << 16) | (yuv_y[y] << 8) | yuv_u[b-y + 32];
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}
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}
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void rgb565_to_uyvy(void *d, const void *s, int pixels, int x2)
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{
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uint32_t *dst = d;
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const uint16_t *src = s;
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if (x2)
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for (; pixels > 0; src += 4, dst += 4, pixels -= 4)
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{
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struct uyvy *uyvy0 = yuv_uyvy + src[0], *uyvy1 = yuv_uyvy + src[1];
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struct uyvy *uyvy2 = yuv_uyvy + src[2], *uyvy3 = yuv_uyvy + src[3];
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dst[0] = (uyvy0->y << 24) | uyvy0->vyu;
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dst[1] = (uyvy1->y << 24) | uyvy1->vyu;
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dst[2] = (uyvy2->y << 24) | uyvy2->vyu;
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dst[3] = (uyvy3->y << 24) | uyvy3->vyu;
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} else
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for (; pixels > 0; src += 4, dst += 2, pixels -= 4)
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{
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struct uyvy *uyvy0 = yuv_uyvy + src[0], *uyvy1 = yuv_uyvy + src[1];
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struct uyvy *uyvy2 = yuv_uyvy + src[2], *uyvy3 = yuv_uyvy + src[3];
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dst[0] = (uyvy1->y << 24) | uyvy0->vyu;
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dst[1] = (uyvy3->y << 24) | uyvy2->vyu;
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}
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}
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static int clear_buf_cnt, clear_stat_cnt;
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void plat_video_flip(void)
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{
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if (plat_sdl_overlay != NULL) {
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SDL_Rect dstrect =
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{ 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
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SDL_LockYUVOverlay(plat_sdl_overlay);
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rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
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g_screen_ppitch * g_screen_height,
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plat_sdl_overlay->w > 2*plat_sdl_overlay->h);
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SDL_UnlockYUVOverlay(plat_sdl_overlay);
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SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
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}
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else if (plat_sdl_gl_active) {
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gl_flip(shadow_fb, g_screen_ppitch, g_screen_height);
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}
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else {
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if (SDL_MUSTLOCK(plat_sdl_screen)) {
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SDL_UnlockSurface(plat_sdl_screen);
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SDL_Flip(plat_sdl_screen);
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SDL_LockSurface(plat_sdl_screen);
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} else
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SDL_Flip(plat_sdl_screen);
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g_screen_ptr = plat_sdl_screen->pixels;
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plat_video_set_buffer(g_screen_ptr);
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if (clear_buf_cnt) {
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memset(g_screen_ptr, 0, plat_sdl_screen->w*plat_sdl_screen->h * 2);
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clear_buf_cnt--;
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}
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}
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if (clear_stat_cnt) {
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unsigned short *d = (unsigned short *)g_screen_ptr + g_screen_ppitch * g_screen_height;
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int l = g_screen_ppitch * 8;
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memset((int *)(d - l), 0, l * 2);
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clear_stat_cnt--;
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}
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}
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void plat_video_wait_vsync(void)
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{
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}
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void plat_video_clear_status(void)
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{
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clear_stat_cnt = 3; // do it thrice in case of triple buffering
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}
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void plat_video_clear_buffers(void)
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{
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if (plat_sdl_overlay != NULL || plat_sdl_gl_active)
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memset(shadow_fb, 0, plat_sdl_screen->w*plat_sdl_screen->h * 2);
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else {
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memset(g_screen_ptr, 0, plat_sdl_screen->w*plat_sdl_screen->h * 2);
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clear_buf_cnt = 3; // do it thrice in case of triple buffering
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}
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}
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void plat_video_menu_enter(int is_rom_loaded)
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{
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if (SDL_MUSTLOCK(plat_sdl_screen))
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SDL_UnlockSurface(plat_sdl_screen);
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plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
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g_screen_ptr = shadow_fb;
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plat_video_set_buffer(g_screen_ptr);
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}
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void plat_video_menu_begin(void)
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{
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if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
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g_menuscreen_ptr = shadow_fb;
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}
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else {
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if (SDL_MUSTLOCK(plat_sdl_screen))
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SDL_LockSurface(plat_sdl_screen);
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g_menuscreen_ptr = plat_sdl_screen->pixels;
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}
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}
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void plat_video_menu_end(void)
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{
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if (plat_sdl_overlay != NULL) {
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SDL_Rect dstrect =
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{ 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
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SDL_LockYUVOverlay(plat_sdl_overlay);
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rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
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g_menuscreen_pp * g_menuscreen_h, 0);
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SDL_UnlockYUVOverlay(plat_sdl_overlay);
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SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
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}
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else if (plat_sdl_gl_active) {
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gl_flip(g_menuscreen_ptr, g_menuscreen_pp, g_menuscreen_h);
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}
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else {
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if (SDL_MUSTLOCK(plat_sdl_screen))
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SDL_UnlockSurface(plat_sdl_screen);
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SDL_Flip(plat_sdl_screen);
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}
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g_menuscreen_ptr = NULL;
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}
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void plat_video_menu_leave(void)
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{
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}
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void plat_video_loop_prepare(void)
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{
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if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
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g_screen_ptr = shadow_fb;
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g_screen_width = 320;
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g_screen_height = 240;
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g_screen_ppitch = g_screen_width;
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}
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else {
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if (SDL_MUSTLOCK(plat_sdl_screen))
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SDL_LockSurface(plat_sdl_screen);
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g_screen_ptr = plat_sdl_screen->pixels;
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g_screen_width = g_menuscreen_w;
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g_screen_height = g_menuscreen_h;
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g_screen_ppitch = g_menuscreen_pp;
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}
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plat_video_set_buffer(g_screen_ptr);
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plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);
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}
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void plat_early_init(void)
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{
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}
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static void plat_sdl_quit(void)
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{
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// for now..
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exit(1);
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}
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void plat_init(void)
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{
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int shadow_size;
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int ret;
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ret = plat_sdl_init();
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if (ret != 0)
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exit(1);
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SDL_ShowCursor(0);
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#if defined(__RG350__) || defined(__GCW0__)
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// opendingux on JZ47x0 may falsely report a HW overlay, fix to window
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plat_target.vout_method = 0;
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#endif
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plat_sdl_quit_cb = plat_sdl_quit;
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SDL_WM_SetCaption("PicoDrive " VERSION, NULL);
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g_menuscreen_w = plat_sdl_screen->w;
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g_menuscreen_h = plat_sdl_screen->h;
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g_menuscreen_pp = g_menuscreen_w;
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g_menuscreen_ptr = NULL;
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shadow_size = g_menuscreen_w * g_menuscreen_h * 2;
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if (shadow_size < 320 * 480 * 2)
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shadow_size = 320 * 480 * 2;
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shadow_fb = calloc(1, shadow_size);
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g_menubg_ptr = calloc(1, shadow_size);
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if (shadow_fb == NULL || g_menubg_ptr == NULL) {
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fprintf(stderr, "OOM\n");
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exit(1);
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}
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g_screen_width = 320;
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g_screen_height = 240;
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g_screen_ppitch = 320;
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g_screen_ptr = shadow_fb;
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in_sdl_platform_data.kmap_size = in_sdl_key_map_sz,
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in_sdl_platform_data.jmap_size = in_sdl_joy_map_sz,
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in_sdl_platform_data.key_names = *in_sdl_key_names,
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in_sdl_init(&in_sdl_platform_data, plat_sdl_event_handler);
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in_probe();
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bgr_to_uyvy_init();
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}
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void plat_finish(void)
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{
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free(shadow_fb);
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shadow_fb = NULL;
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free(g_menubg_ptr);
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g_menubg_ptr = NULL;
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plat_sdl_finish();
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}
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