Function gspPresentBuffer

libctru/source/services/gspgpu.c:240–274

}

bool gspPresentBuffer(unsigned screen, unsigned swap, const void* fb_a, const void* fb_b, u32 stride, u32 mode)
{
	GSPGPU_FramebufferInfo info;
	info.active_framebuf = swap;
	info.framebuf0_vaddr = (u32*)fb_a;
	info.framebuf1_vaddr = (u32*)fb_b;
	info.framebuf_widthbytesize = stride;
	info.format = mode;
	info.framebuf_dispselect = swap;
	info.unk = 0;

	s32* fbInfoHeader = (s32*)((u8*)gspSharedMem + 0x200 + gspThreadId*0x80 + screen*0x40);
	GSPGPU_FramebufferInfo* fbInfos = (GSPGPU_FramebufferInfo*)&fbInfoHeader[1];
	unsigned pos = 1 - (*fbInfoHeader & 0xff);
	fbInfos[pos] = info;
	__dsb();

	union
	{
		s32 header;
		struct { u8 swap, update; };
	} u;

	bool ret;
	do
	{
		u.header = __ldrex(fbInfoHeader);
		ret = u.update != 0;

		u.swap = pos;
		u.update = 1;
	} while (__strex(fbInfoHeader, u.header));

	return ret;
}

bool gspIsPresentPending(unsigned screen)
{