RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

libretro, add new good (aka 8bit accurate) renderer, fix 256px mode rendering

Browse source
This commit is contained in:
kub 2020-12-12 14:48:15 +01:00
parent 207e5ba0ee
commit cd262e4cc7
2 changed files with 56 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

81
platform/libretro/libretro.c
View file

@ -84,9 +84,10 @@ static retro_audio_sample_batch_t audio_batch_cb;
#define VOUT_MAX_WIDTH 328
#else
#define VOUT_MAX_WIDTH 320
#define VOUT_32BIT_WIDTH 256
#define VOUT_32COL_WIDTH 256
#endif
#define VOUT_MAX_HEIGHT 240
#define INITIAL_SND_RATE 44100
static const float VOUT_PAR = 0.0;
@ -101,6 +102,8 @@ static int vm_current_start_line = -1;
static int vm_current_line_count = -1;
static int vm_current_is_32cols = -1;
static int vout_16bit = 1;
static int vout_format = PDF_RGB555;
static void *vout_buf;
static int vout_width, vout_height, vout_offset;
static float user_vout_width = 0.0;
@ -597,6 +600,9 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
vm_current_line_count = line_count;
vm_current_is_32cols = is_32cols;
// 8bit renderes create a 328x256 CLUT image, while 16bit creates 320x240 RGB
vout_16bit = vout_format == PDF_RGB555 || (PicoIn.AHW & PAHW_32X);
#if defined(RENDER_GSKIT_PS2)
if (is_32cols) {
padding = (struct retro_hw_ps2_insets){start_line, 16.0f, VOUT_MAX_HEIGHT - line_count - start_line, 64.0f};
@ -610,9 +616,10 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
PicoDrawSetOutBuf(vout_buf, vout_width);
#else
vout_width = is_32cols ? VOUT_32BIT_WIDTH : VOUT_MAX_WIDTH;
vout_width = is_32cols ? VOUT_32COL_WIDTH : VOUT_MAX_WIDTH;
memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
if (vout_16bit)
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
if (show_overscan)
{
@ -631,8 +638,8 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
VOUT_MAX_HEIGHT : vout_height;
vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ?
vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset;
#endif
Pico.m.dirtyPal = 1;
// Update the geometry
retro_get_system_av_info(&av_info);
@ -641,8 +648,14 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
void emu_32x_startup(void)
{
PicoDrawSetOutFormat(PDF_RGB555, 0);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
PicoDrawSetOutFormat(vout_format, 0);
if ((vm_current_start_line != -1) &&
(vm_current_line_count != -1) &&
(vm_current_is_32cols != -1))
emu_video_mode_change(
vm_current_start_line,
vm_current_line_count,
vm_current_is_32cols);
}
void lprintf(const char *fmt, ...)
@ -1386,6 +1399,7 @@ static void update_variables(bool first_run)
int OldPicoRegionOverride;
float old_user_vout_width;
unsigned old_frameskip_type;
int old_vout_format;
double new_sound_rate;
var.value = NULL;
@ -1469,17 +1483,6 @@ static void update_variables(bool first_run)
show_overscan = true;
}
if (show_overscan != old_show_overscan)
{
if ((vm_current_start_line != -1) &&
(vm_current_line_count != -1) &&
(vm_current_is_32cols != -1))
emu_video_mode_change(
vm_current_start_line,
vm_current_line_count,
vm_current_is_32cols);
}
var.value = NULL;
var.key = "picodrive_overclk68k";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
@ -1534,13 +1537,21 @@ static void update_variables(bool first_run)
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
frameskip_threshold = strtol(var.value, NULL, 10);
old_vout_format = vout_format;
var.value = NULL;
var.key = "picodrive_renderer";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "fast") == 0)
vout_format = PDF_NONE;
else if (strcmp(var.value, "good") == 0)
vout_format = PDF_8BIT;
else if (strcmp(var.value, "accurate") == 0)
vout_format = PDF_RGB555;
PicoIn.opt &= ~POPT_ALT_RENDERER;
if (vout_format == PDF_NONE)
PicoIn.opt |= POPT_ALT_RENDERER;
else
PicoIn.opt &= ~POPT_ALT_RENDERER;
PicoDrawSetOutFormat(vout_format, 0);
}
var.value = NULL;
@ -1557,6 +1568,18 @@ static void update_variables(bool first_run)
}
}
/* setup video if required */
if (show_overscan != old_show_overscan || vout_format != old_vout_format)
{
if ((vm_current_start_line != -1) &&
(vm_current_line_count != -1) &&
(vm_current_is_32cols != -1))
emu_video_mode_change(
vm_current_start_line,
vm_current_line_count,
vm_current_is_32cols);
}
/* Reinitialise frameskipping, if required */
if (((frameskip_type != old_frameskip_type) ||
(Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) &&
@ -1708,23 +1731,29 @@ void retro_run(void)
ps2->padding = padding;
#else
if (PicoIn.opt & POPT_ALT_RENDERER) {
/* In retro_init, PicoDrawSetOutBuf is called to make sure the output gets written to vout_buf, but this only
* applies to the line renderer (pico/draw.c). The faster tile-based renderer (pico/draw2.c) enabled by
* POPT_ALT_RENDERER writes to Pico.est.Draw2FB, so we need to manually copy that to vout_buf.
if (!vout_16bit) {
/* The 8 bit renderers write a CLUT image in Pico.est.Draw2FB, while libretro wants RGB in vout_buf.
* We need to manually copy that to vout_buf, applying the CLUT on the way. Especially
* with the fast renderer this is improving performance, at the expense of accuracy.
*/
/* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */
unsigned short *pd = (unsigned short *)vout_buf;
/* Skip the leftmost 8 columns (it seems to be used as some sort of caching or overscan area) */
/* Skip the leftmost 8 columns (it is used as an overlap area for rendering) */
unsigned char *ps = Pico.est.Draw2FB + 8;
unsigned short *pal = Pico.est.HighPal;
int x;
if (Pico.m.dirtyPal)
PicoDrawUpdateHighPal();
/* Copy up to the max height to include the overscan area, and skip the leftmost 8 columns again */
for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8)
for (x = 0; x < vout_width; x++)
for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8) {
for (x = 0; x < vout_width; x+=4) {
*pd++ = pal[*ps++];
*pd++ = pal[*ps++];
*pd++ = pal[*ps++];
*pd++ = pal[*ps++];
}
ps += 320-vout_width; /* Advance to next line in case of 32col mode */
}
}
buff = (char*)vout_buf + vout_offset;