xref: /aosp_15_r20/external/libkmsxx/kms++/src/modedb.cpp (revision f0687c8a10b3e371dbe09214db6664e37c283cca)

#include <xf86drm.h>
#include <stdexcept>
#include <cmath>

#include <kms++/modedb.h>

using namespace std;

namespace kms
{
static const Videomode& find_from_table(const Videomode* modes, uint32_t width, uint32_t height, float vrefresh, bool ilace)
{
	for (unsigned i = 0; modes[i].clock; ++i) {
		const Videomode& m = modes[i];

		if (m.hdisplay != width || m.vdisplay != height)
			continue;

		if (ilace != m.interlace())
			continue;

		if (vrefresh && vrefresh != m.calculated_vrefresh())
			continue;

		return m;
	}

	// If not found, do another round using rounded vrefresh

	for (unsigned i = 0; modes[i].clock; ++i) {
		const Videomode& m = modes[i];

		if (m.hdisplay != width || m.vdisplay != height)
			continue;

		if (ilace != m.interlace())
			continue;

		if (vrefresh && vrefresh != roundf(m.calculated_vrefresh()))
			continue;

		return m;
	}

	throw invalid_argument("mode not found");
}

const Videomode& find_dmt(uint32_t width, uint32_t height, float vrefresh, bool ilace)
{
	return find_from_table(dmt_modes, width, height, vrefresh, ilace);
}

const Videomode& find_cea(uint32_t width, uint32_t height, float vrefresh, bool ilace)
{
	return find_from_table(cea_modes, width, height, vrefresh, ilace);
}

} // namespace kms