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Add RETRO_ENVIRONMENT_SET_GEOMETRY.

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This commit is contained in:
Themaister 2014-06-07 13:19:28 +02:00
parent 94f059a4a4
commit b88d4d2a75
3 changed files with 52 additions and 4 deletions
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26
dynamic.c
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@ -927,6 +927,32 @@ bool rarch_environment_cb(unsigned cmd, void *data)
break;
}
case RETRO_ENVIRONMENT_SET_GEOMETRY:
{
RARCH_LOG("Environ SET_GEOMETRY.\n");
const struct retro_game_geometry *in_geom = (const struct retro_game_geometry*)data;
struct retro_game_geometry *geom = &g_extern.system.av_info.geometry;
// Can potentially be called every frame, don't do anything unless required.
if (geom->base_width != in_geom->base_width ||
geom->base_height != in_geom->base_height ||
geom->aspect_ratio != in_geom->aspect_ratio)
{
geom->base_width = in_geom->base_width;
geom->base_height = in_geom->base_height;
geom->aspect_ratio = in_geom->aspect_ratio;
RARCH_LOG("SET_GEOMETRY: %ux%u, aspect: %.3f.\n",
geom->base_width, geom->base_height, geom->aspect_ratio);
// Forces recomputation of aspect ratios if using core-dependent aspect ratios.
if (driver.video_poke && driver.video_poke->set_aspect_ratio && driver.video_data)
driver.video_poke->set_aspect_ratio(driver.video_data, g_settings.video.aspect_ratio_idx);
// TODO: Figure out what to do, if anything, with recording.
}
break;
}
// Private extensions for internal use, not part of libretro API.
case RETRO_ENVIRONMENT_SET_LIBRETRO_PATH:
RARCH_LOG("Environ (Private) SET_LIBRETRO_PATH.\n");

9
libretro-test/libretro-test.c
View File

@ -310,6 +310,7 @@ static void check_variables(void)
float last_rate = last_sample_rate;
struct retro_system_av_info info;
retro_get_system_av_info(&info);
if ((last != last_aspect && last != 0.0f) || (last_rate != last_sample_rate && last_rate != 0.0f))
{
// SET_SYSTEM_AV_INFO can only be called within retro_run().
@ -317,8 +318,12 @@ static void check_variables(void)
// on last and last_rate ensures this path is never hit that early.
// last_aspect and last_sample_rate are not updated until retro_get_system_av_info(),
// which must come after retro_load_game().
bool ret = environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &info);
logging.log(RETRO_LOG_INFO, "SET_SYSTEM_AV_INFO = %u.\n", ret);
bool ret;
if (last_rate != last_sample_rate && last_rate != 0.0f) // If audio rate changes, go through SET_SYSTEM_AV_INFO.
ret = environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &info);
else // If only aspect changed, take the simpler path.
ret = environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &info.geometry);
logging.log(RETRO_LOG_INFO, "SET_SYSTEM_AV_INFO/SET_GEOMETRY = %u.\n", ret);
}
}

21
libretro.h
View File

@ -591,8 +591,8 @@ enum retro_mod
// avoid setting the "worst case" in max_width/max_height.
//
// ***HIGHLY RECOMMENDED*** Do not call this callback every time resolution changes in an emulator core if it's
// expected to be a temporary change, for the reasons of possible driver reinit.
// This call is not a free pass for not trying to provide correct values in retro_get_system_av_info().
// expected to be a temporary change, for the reasons of possible driver reinitialization.
// This call is not a free pass for not trying to provide correct values in retro_get_system_av_info(). If you need to change things like aspect ratio or nominal width/height, use RETRO_ENVIRONMENT_SET_GEOMETRY, which is a softer variant of SET_SYSTEM_AV_INFO.
//
// If this returns false, the frontend does not acknowledge a changed av_info struct.
#define RETRO_ENVIRONMENT_SET_PROC_ADDRESS_CALLBACK 33
@ -645,6 +645,23 @@ enum retro_mod
//
// Can be called from retro_init and retro_load_game.
//
#define RETRO_ENVIRONMENT_SET_GEOMETRY 37
// const struct retro_game_geometry * --
// This environment call is similar to SET_SYSTEM_AV_INFO for changing video parameters,
// but provides a guarantee that drivers will not be reinitialized.
// This can only be called from within retro_run().
//
// The purpose of this call is to allow a core to alter nominal width/heights as well as aspect ratios on-the-fly,
// which can be useful for some emulators to change in run-time.
//
// max_width/max_height arguments are ignored and cannot be changed
// with this call as this could potentially require a reinitialization or a non-constant time operation.
// If max_width/max_height are to be changed, SET_SYSTEM_AV_INFO is required.
//
// A frontend must guarantee that this environment call completes in constant time.
#define RETRO_MEMDESC_CONST (1 << 0) // The frontend will never change this memory area once retro_load_game has returned.
#define RETRO_MEMDESC_BIGENDIAN (1 << 1) // The memory area contains big endian data. Default is little endian.