1 files changed, 64 insertions, 0 deletions
diff --git a/kms++/src/extframebuffer.cpp b/kms++/src/extframebuffer.cpp
new file mode 100644
index 0000000..d67cbad
--- /dev/null
+++ b/kms++/src/extframebuffer.cpp
@@ -0,0 +1,64 @@
+
+#include <cstring>
+#include <cerrno>
+
+#include <stdexcept>
+#include <sys/mman.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include <kms++/kms++.h>
+
+using namespace std;
+
+namespace kms
+{
+ExtFramebuffer::ExtFramebuffer(Card& card, uint32_t width, uint32_t height, PixelFormat format,
+			       vector<uint32_t> handles, vector<uint32_t> pitches, vector<uint32_t> offsets, vector<uint64_t> modifiers)
+	: Framebuffer(card, width, height)
+{
+	m_format = format;
+
+	const PixelFormatInfo& format_info = get_pixel_format_info(format);
+
+	m_num_planes = format_info.num_planes;
+
+	if (handles.size() != m_num_planes || pitches.size() != m_num_planes || offsets.size() != m_num_planes)
+		throw std::invalid_argument("the size of handles, pitches and offsets has to match number of planes");
+
+	for (int i = 0; i < format_info.num_planes; ++i) {
+		FramebufferPlane& plane = m_planes.at(i);
+
+		plane.handle = handles[i];
+		plane.stride = pitches[i];
+		plane.offset = offsets[i];
+		plane.modifier = modifiers.empty() ? 0 : modifiers[i];
+		plane.size = plane.stride * height;
+		plane.map = 0;
+	}
+
+	uint32_t id;
+	handles.resize(4);
+	pitches.resize(4);
+	offsets.resize(4);
+	int r;
+
+	if (modifiers.empty()) {
+		r = drmModeAddFB2(card.fd(), width, height, pixel_format_to_fourcc(format), handles.data(), pitches.data(), offsets.data(), &id, 0);
+	} else {
+		modifiers.resize(4);
+		r = drmModeAddFB2WithModifiers(card.fd(), width, height, pixel_format_to_fourcc(format), handles.data(), pitches.data(), offsets.data(), modifiers.data(), &id, DRM_MODE_FB_MODIFIERS);
+	}
+
+	if (r)
+		throw std::invalid_argument(string("Failed to create ExtFramebuffer: ") + strerror(r));
+
+	set_id(id);
+}
+
+ExtFramebuffer::~ExtFramebuffer()
+{
+	drmModeRmFB(card().fd(), id());
+}
+
+} // namespace kms