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sdl, fix scaling for non-4:3 display

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This commit is contained in:
kub 2021-09-11 22:18:38 +02:00
parent 0924243a53
commit ce79590af3
2 changed files with 28 additions and 31 deletions
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4
platform/common/plat_sdl.c
View file

@ -253,9 +253,9 @@ void plat_video_loop_prepare(void)
{
// take over any new vout settings
plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
// switch over to scaled output if available
// switch over to scaled output if available, but keep the aspect ratio
if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
g_screen_width = 320;
g_screen_width = (240 * g_menuscreen_w / g_menuscreen_h) & ~1;
g_screen_height = 240;
g_screen_ppitch = g_screen_width;
plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);

49
platform/linux/emu.c
View file

@ -97,12 +97,8 @@ static void draw_cd_leds(void)
static u16 *screen_buffer(u16 *buf)
{
// center the emulator display on the screen if screen is larger
if (currentConfig.scaling != EOPT_SCALE_HW)
buf += (g_screen_width-320)/2;
if (currentConfig.vscaling != EOPT_SCALE_HW)
buf += (g_screen_height-240)/2 * g_screen_ppitch;
return buf;
return buf + screen_y * g_screen_ppitch + screen_x -
(out_y * g_screen_ppitch + out_x);
}
void screen_blit(u16 *pd, int pp, u8* ps, int ss, u16 *pal)
@ -151,8 +147,8 @@ void pemu_finalize_frame(const char *fps, const char *notice)
if (!is_16bit_mode()) {
// convert the 8 bit CLUT output to 16 bit RGB
u16 *pd = screen_buffer(g_screen_ptr) +
screen_y * g_screen_ppitch + screen_x;
u8 *ps = Pico.est.Draw2FB + 328*out_y + out_x + 8;
out_y * g_screen_ppitch + out_x;
u8 *ps = Pico.est.Draw2FB + out_y * 328 + out_x + 8;
PicoDrawUpdateHighPal();
@ -260,7 +256,6 @@ void plat_debug_cat(char *str)
void pemu_forced_frame(int no_scale, int do_emu)
{
u16 *pd = screen_buffer(g_screen_ptr);
int hs = currentConfig.scaling, vs = currentConfig.vscaling;
// create centered and sw scaled (if scaling enabled) 16 bit output
@ -268,11 +263,11 @@ void pemu_forced_frame(int no_scale, int do_emu)
Pico.m.dirtyPal = 1;
if (currentConfig.scaling) currentConfig.scaling = EOPT_SCALE_SW;
if (currentConfig.vscaling) currentConfig.vscaling = EOPT_SCALE_SW;
plat_video_set_size(320, 240);
plat_video_set_size(g_menuscreen_w, g_menuscreen_h);
// render a frame in 16 bit mode
render_bg = 1;
emu_cmn_forced_frame(no_scale, do_emu, pd);
emu_cmn_forced_frame(no_scale, do_emu, screen_buffer(g_screen_ptr));
render_bg = 0;
g_menubg_src_ptr = g_screen_ptr;
@ -289,8 +284,8 @@ static int cb_vscaling_begin(unsigned int line)
// at start of new frame?
if (line < prevline) {
// set y frame offset (see emu_change_video_mode)
u16 *dest = g_screen_ptr;
Pico.est.DrawLineDest = dest + screen_y * g_screen_ppitch;
Pico.est.DrawLineDest = screen_buffer(g_screen_ptr) +
(out_y * g_screen_ppitch + out_x);
vscale_state = 0;
}
prevline = line;
@ -326,41 +321,43 @@ void emu_video_mode_change(int start_line, int line_count, int start_col, int co
out_h = line_count; out_w = col_count;
PicoDrawSetCallbacks(NULL, NULL);
screen_x = screen_y = 0;
screen_w = 320, screen_h = 240;
// center output in screen
screen_w = g_screen_width, screen_x = (screen_w - out_w)/2;
screen_h = g_screen_height, screen_y = (screen_h - out_h)/2;
switch (currentConfig.scaling) {
case EOPT_SCALE_HW:
screen_w = out_w;
screen_x = 0;
break;
case EOPT_SCALE_NONE:
// center output in screen
screen_x = (screen_w - out_w)/2;
case EOPT_SCALE_SW:
screen_x = (screen_w - 320)/2;
break;
}
switch (currentConfig.vscaling) {
case EOPT_SCALE_HW:
// NTSC always has 224 visible lines, anything smaller has bars
screen_h = (out_h < 224 ? 224 : out_h);
screen_y = 0;
// NTSC always has 224 visible lines, anything smaller has bars
if (out_h < 224)
screen_y += (224 - out_h)/2;
// handle vertical centering for 16 bit mode
screen_y = (screen_h - out_h) / 2;
if (is_16bit_mode())
PicoDrawSetCallbacks(cb_vscaling_begin,cb_vscaling_nop);
break;
case EOPT_SCALE_SW:
screen_y = (screen_h - 240)/2;
// NTSC always has 224 visible lines, anything smaller has bars
if (out_y > 7)
screen_y = out_y - 7;
if (out_h < 224)
screen_y += (224 - out_h)/2;
// in 16 bit mode sw scaling is divided between core and platform
if (is_16bit_mode() && out_h < 240)
PicoDrawSetCallbacks(cb_vscaling_begin,cb_vscaling_end);
break;
case EOPT_SCALE_NONE:
// center output in screen
screen_y = (screen_h - out_h)/2;
break;
}
if (screen_w != g_screen_width || screen_h != g_screen_height)
plat_video_set_size(screen_w, screen_h);
plat_video_set_buffer(g_screen_ptr);