Import thekla_atlas

As requested by reduz, an import of thekla_atlas into thirdparty/

1 files changed, 49 insertions, 0 deletions

diff --git a/thirdparty/thekla_atlas/nvmesh/raster/Raster.h b/thirdparty/thekla_atlas/nvmesh/raster/Raster.h
new file mode 100644
index 0000000000..05af2ddb00
--- /dev/null
+++ b/thirdparty/thekla_atlas/nvmesh/raster/Raster.h
@@ -0,0 +1,49 @@
+// This code is in the public domain -- castanyo@yahoo.es
+
+#pragma once
+#ifndef NV_MESH_RASTER_H
+#define NV_MESH_RASTER_H
+
+/** @file Raster.h
+ * @brief Rasterization library.
+ *
+ * This is just a standard scanline rasterizer that I took from one of my old
+ * projects. The perspective correction wasn't necessary so I just removed it.
+**/
+
+#include "nvmath/Vector.h"
+#include "nvmesh/nvmesh.h"
+
+namespace nv
+{
+
+    namespace Raster 
+    {
+        enum Mode {
+            Mode_Nearest,
+            Mode_Antialiased,
+            //Mode_Conservative
+        };
+
+
+        /// A callback to sample the environment. Return false to terminate rasterization.
+        typedef bool (NV_CDECL * SamplingCallback)(void * param, int x, int y, Vector3::Arg bar, Vector3::Arg dx, Vector3::Arg dy, float coverage);
+
+        // Process the given triangle. Returns false if rasterization was interrupted by the callback.
+        NVMESH_API bool drawTriangle(Mode mode, Vector2::Arg extents, bool enableScissors, const Vector2 v[3], SamplingCallback cb, void * param);
+
+        // Process the given quad. Returns false if rasterization was interrupted by the callback.
+        NVMESH_API bool drawQuad(Mode mode, Vector2::Arg extents, bool enableScissors, const Vector2 v[4], SamplingCallback cb, void * param);
+
+        typedef bool (NV_CDECL * LineSamplingCallback)(void * param, int x, int y, float t, float d);    // t is the position along the segment, d is the distance to the line.
+
+        // Process the given line.
+        NVMESH_API void drawLine(bool antialias, Vector2::Arg extents, bool enableScissors, const Vector2 v[2], LineSamplingCallback cb, void * param);
+
+        // Draw vertical or horizontal segments. For degenerate triangles.
+        //NVMESH_API void drawSegment(Vector2::Arg extents, bool enableScissors, const Vector2 v[2], SamplingCallback cb, void * param);
+    }
+}
+
+
+#endif // NV_MESH_RASTER_H