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#include <cstring>
#include <cerrno>
#include <stdexcept>
#include <sys/mman.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <fcntl.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <drm.h>
#include <drm_mode.h>

#include <kms++/kms++.h>

#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

using namespace std;

namespace kms
{

DumbFramebuffer::DumbFramebuffer(Card &card, uint32_t width, uint32_t height, const string& fourcc)
	:DumbFramebuffer(card, width, height, FourCCToPixelFormat(fourcc))
{
}

DumbFramebuffer::DumbFramebuffer(Card& card, uint32_t width, uint32_t height, PixelFormat format)
	:Framebuffer(card, width, height), m_format(format)
{
	int r;

	const PixelFormatInfo& format_info = get_pixel_format_info(m_format);

	m_num_planes = format_info.num_planes;

	for (int i = 0; i < format_info.num_planes; ++i) {
		const PixelFormatPlaneInfo& pi = format_info.planes[i];
		FramebufferPlane& plane = m_planes.at(i);

		/* create dumb buffer */
		struct drm_mode_create_dumb creq = drm_mode_create_dumb();
		creq.width = width;
		creq.height = height / pi.ysub;
		creq.bpp = pi.bitspp;
		r = drmIoctl(card.fd(), DRM_IOCTL_MODE_CREATE_DUMB, &creq);
		if (r)
			throw invalid_argument(string("DRM_IOCTL_MODE_CREATE_DUMB failed: ") + strerror(errno));

		plane.handle = creq.handle;
		plane.stride = creq.pitch;
		plane.size = creq.height * creq.pitch;
		plane.offset = 0;
		plane.map = 0;
		plane.prime_fd = -1;
	}

	/* create framebuffer object for the dumb-buffer */
	uint32_t bo_handles[4] = { m_planes[0].handle, m_planes[1].handle };
	uint32_t pitches[4] = { m_planes[0].stride, m_planes[1].stride };
	uint32_t offsets[4] = {  m_planes[0].offset, m_planes[1].offset };
	uint32_t id;
	r = drmModeAddFB2(card.fd(), width, height, (uint32_t)format,
			  bo_handles, pitches, offsets, &id, 0);
	if (r)
		throw invalid_argument(string("drmModeAddFB2 failed: ") + strerror(errno));

	set_id(id);
}

DumbFramebuffer::~DumbFramebuffer()
{
	/* delete framebuffer */
	drmModeRmFB(card().fd(), id());

	for (uint i = 0; i < m_num_planes; ++i) {
		FramebufferPlane& plane = m_planes.at(i);

		/* unmap buffer */