draw functions

include/Refresh.h

@@ -24,8 +24,6 @@
  *
  */
 
-#include <FNA3D.h>
-
 #ifndef REFRESH_H
 #define REFRESH_H
 
@@ -54,6 +52,7 @@ extern "C" {
 
 /* Type Declarations */
 
+typedef struct REFRESH_Device REFRESH_Device;
 typedef struct REFRESH_Texture REFRESH_Texture;
 typedef struct REFRESH_Buffer REFRESH_Buffer;
 typedef struct REFRESH_ColorTarget REFRESH_ColorTarget;
@@ -62,6 +61,16 @@ typedef struct REFRESH_Framebuffer REFRESH_Framebuffer;
 typedef struct REFRESH_RenderPass REFRESH_RenderPass;
 typedef struct REFRESH_Pipeline REFRESH_Pipeline;
 
+typedef enum REFRESH_PrimitiveType
+{
+    REFRESH_PRIMITIVETYPE_POINTLIST,
+	REFRESH_PRIMITIVETYPE_LINELIST,
+	REFRESH_PRIMITIVETYPE_LINESTRIP,
+	REFRESH_PRIMITIVETYPE_TRIANGLELIST,
+	REFRESH_PRIMITIVETYPE_TRIANGLESTRIP,
+    REFRESH_PRIMITIVETYPE_TRIANGLEFAN
+} REFRESH_PrimitiveType;
+
 typedef enum REFRESH_LoadOp
 {
     REFRESH_LOADOP_LOAD,
@@ -136,10 +145,60 @@ typedef enum REFRESH_BufferUsage
 
 /* Structures */
 
+typedef struct REFRESH_Color
+{
+	uint8_t r;
+	uint8_t g;
+	uint8_t b;
+	uint8_t a;
+} REFRESH_Color;
+
+typedef struct REFRESH_Rect
+{
+	int32_t x;
+	int32_t y;
+	int32_t w;
+	int32_t h;
+} REFRESH_Rect;
+
+typedef struct REFRESH_Vec4
+{
+	float x;
+	float y;
+	float z;
+	float w;
+} REFRESH_Vec4;
+
+typedef struct REFRESH_Viewport
+{
+	int32_t x;
+	int32_t y;
+	int32_t w;
+	int32_t h;
+	float minDepth;
+	float maxDepth;
+} REFRESH_Viewport;
+
+typedef enum REFRESH_VertexElementFormat
+{
+	REFRESH_VERTEXELEMENTFORMAT_SINGLE,
+	REFRESH_VERTEXELEMENTFORMAT_VECTOR2,
+	REFRESH_VERTEXELEMENTFORMAT_VECTOR3,
+	REFRESH_VERTEXELEMENTFORMAT_VECTOR4,
+	REFRESH_VERTEXELEMENTFORMAT_COLOR,
+	REFRESH_VERTEXELEMENTFORMAT_BYTE4,
+	REFRESH_VERTEXELEMENTFORMAT_SHORT2,
+	REFRESH_VERTEXELEMENTFORMAT_SHORT4,
+	REFRESH_VERTEXELEMENTFORMAT_NORMALIZEDSHORT2,
+	REFRESH_VERTEXELEMENTFORMAT_NORMALIZEDSHORT4,
+	REFRESH_VERTEXELEMENTFORMAT_HALFVECTOR2,
+	REFRESH_VERTEXELEMENTFORMAT_HALFVECTOR4
+} REFRESH_VertexElementFormat;
+
 typedef struct REFRESH_VertexElement
 {
 	int32_t offset;
-	FNA3D_VertexElementFormat vertexElementFormat;
+	REFRESH_VertexElementFormat vertexElementFormat;
 	int32_t usageIndex;
 } REFRESH_VertexElement;
 
@@ -176,6 +235,83 @@ REFRESHAPI uint32_t REFRESH_LinkedVersion(void);
 
 /* Functions */
 
+/* Drawing */
+
+/* Clears the active draw buffers of any previous contents.
+ *
+ * options:	Bitflags to specify color/depth/stencil buffers for clearing.
+ * color:	The new value of the cleared color buffer.
+ * depth:	The new value of the cleared depth buffer.
+ * stencil:	The new value of the cleared stencil buffer.
+ */
+REFRESHAPI void REFRESH_Clear(
+	REFRESH_Device *device,
+	REFRESH_Vec4 **colors,
+    uint32_t colorCount,
+	float depth,
+	int32_t stencil
+);
+
+/* Draws data from vertex/index buffers.
+ *
+ * primitiveType:	The primitive topology of the vertex data.
+ * baseVertex:		The starting offset to read from the vertex buffer.
+ * minVertexIndex:	The lowest index value expected from the index buffer.
+ * numVertices:		The highest offset expected from the index buffer.
+ * startIndex:		The starting offset to read from the index buffer.
+ * primitiveCount:	The number of primitives to draw.
+ * indices:		The index buffer to bind for this draw call.
+ * indexElementSize:	The size of the index type for this index buffer.
+ */
+REFRESHAPI void REFRESH_DrawIndexedPrimitives(
+	REFRESH_Device *device,
+	REFRESH_PrimitiveType primitiveType,
+	int32_t baseVertex,
+	int32_t minVertexIndex,
+	int32_t numVertices,
+	int32_t startIndex,
+	int32_t primitiveCount,
+	REFRESH_Buffer *indices,
+	REFRESH_IndexElementSize indexElementSize
+);
+
+/* Draws data from vertex/index buffers with instancing enabled.
+ *
+ * primitiveType:	The primitive topology of the vertex data.
+ * baseVertex:		The starting offset to read from the vertex buffer.
+ * minVertexIndex:	The lowest index value expected from the index buffer.
+ * numVertices:		The highest offset expected from the index buffer.
+ * startIndex:		The starting offset to read from the index buffer.
+ * primitiveCount:	The number of primitives to draw.
+ * instanceCount:	The number of instances that will be drawn.
+ * indices:		The index buffer to bind for this draw call.
+ * indexElementSize:	The size of the index type for this index buffer.
+ */
+REFRESHAPI void REFRESH_DrawInstancedPrimitives(
+	REFRESH_Device *device,
+	REFRESH_PrimitiveType primitiveType,
+	int32_t baseVertex,
+	int32_t minVertexIndex,
+	int32_t numVertices,
+	int32_t startIndex,
+	int32_t primitiveCount,
+	int32_t instanceCount,
+	REFRESH_Buffer *indices,
+	REFRESH_IndexElementSize indexElementSize
+);
+
+/* Draws data from vertex buffers.
+ * primitiveType:	The primitive topology of the vertex data.
+ * vertexStart:		The starting offset to read from the vertex buffer.
+ * primitiveCount:	The number of primitives to draw.
+ */
+REFRESHAPI void REFRESH_DrawPrimitives(
+	REFRESH_Device *device,
+	REFRESH_PrimitiveType primitiveType,
+	int32_t vertexStart,
+	int32_t primitiveCount
+);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */