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Libretro: Add cheevos support for GB/GBC 

Working implementation:
https://github.com/libretro/mgba/issues/182#issuecomment-617561652
This commit is contained in:
negativeExponent 2020-04-22 15:57:07 +08:00 committed by Vicki Pfau
parent 5bc55168af
commit 2531dd736f
1 changed files with 96 additions and 0 deletions
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96
src/platform/libretro/libretro.c
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@ -435,6 +435,102 @@ static void _setupMaps(struct mCore* core) {
environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
}
#endif
#ifdef M_CORE_GB
if (core->platform(core) == PLATFORM_GB) {
struct GB* gb = core->board;
struct retro_memory_descriptor descs[11];
struct retro_memory_map mmaps;
memset(descs, 0, sizeof(descs));
size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
unsigned i = 0;
/* Map ROM */
descs[i].ptr = gb->memory.rom;
descs[i].start = GB_BASE_CART_BANK0;
descs[i].len = GB_SIZE_CART_BANK0;
descs[i].flags = RETRO_MEMDESC_CONST;
i++;
descs[i].ptr = gb->memory.rom;
descs[i].offset = GB_SIZE_CART_BANK0;
descs[i].start = GB_BASE_CART_BANK1;
descs[i].len = GB_SIZE_CART_BANK0;
descs[i].flags = RETRO_MEMDESC_CONST;
i++;
/* Map VRAM */
descs[i].ptr = gb->video.vram;
descs[i].start = GB_BASE_VRAM;
descs[i].len = GB_SIZE_VRAM;
i++;
/* Map working RAM */
descs[i].ptr = gb->memory.wram;
descs[i].start = GB_BASE_WORKING_RAM_BANK0;
descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
i++;
descs[i].ptr = gb->memory.wram;
descs[i].offset = GB_SIZE_WORKING_RAM_BANK0;
descs[i].start = GB_BASE_WORKING_RAM_BANK1;
descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
i++;
/* Map OAM */
descs[i].ptr = &gb->video.oam; /* video.oam is a structure */
descs[i].start = GB_BASE_OAM;
descs[i].len = GB_SIZE_OAM;
descs[i].select = 0xFFFFFF60;
i++;
/* Map mmapped I/O */
descs[i].ptr = gb->memory.io;
descs[i].start = GB_BASE_IO;
descs[i].len = GB_SIZE_IO;
i++;
/* Map High RAM */
descs[i].ptr = gb->memory.hram;
descs[i].start = GB_BASE_HRAM;
descs[i].len = GB_SIZE_HRAM;
descs[i].select = 0xFFFFFF80;
i++;
/* Map IE Register */
descs[i].ptr = &gb->memory.ie;
descs[i].start = GB_BASE_IE;
descs[i].len = 1;
i++;
/* Map External RAM */
if (savedataSize) {
descs[i].ptr = savedata;
descs[i].start = GB_BASE_EXTERNAL_RAM;
descs[i].len = savedataSize;
i++;
}
if (gb->model >= GB_MODEL_CGB) {
/* Map working RAM */
/* banks 2-7 of wram mapped in virtual address so it can be
* accessed without bank switching, GBC only */
descs[i].ptr = gb->memory.wram + 0x2000;
descs[i].start = 0x10000;
descs[i].len = GB_SIZE_WORKING_RAM - 0x2000;
descs[i].select = 0xFFFFA000;
i++;
}
mmaps.descriptors = descs;
mmaps.num_descriptors = i;
bool yes = true;
environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
}
#endif
}
void retro_reset(void) {