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bgfx/include/bgfx.h
bkaradzic a09f804ac3 Fixed discard primitive logic.
2013-07-29 19:01:29 -07:00

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/*
* Copyright 2011-2013 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#ifndef __BGFX_H__
#define __BGFX_H__
#include <stdint.h> // uint32_t
#include <stdlib.h> // size_t
///
#define BGFX_STATE_DEPTH_WRITE UINT64_C(0x0000000000000001)
#define BGFX_STATE_ALPHA_WRITE UINT64_C(0x0000000000000008)
#define BGFX_STATE_ALPHA_MASK UINT64_C(0x000000000000000c)
#define BGFX_STATE_DEPTH_TEST_LESS UINT64_C(0x0000000000000010)
#define BGFX_STATE_DEPTH_TEST_LEQUAL UINT64_C(0x0000000000000020)
#define BGFX_STATE_DEPTH_TEST_EQUAL UINT64_C(0x0000000000000030)
#define BGFX_STATE_DEPTH_TEST_GEQUAL UINT64_C(0x0000000000000040)
#define BGFX_STATE_DEPTH_TEST_GREATER UINT64_C(0x0000000000000050)
#define BGFX_STATE_DEPTH_TEST_NOTEQUAL UINT64_C(0x0000000000000060)
#define BGFX_STATE_DEPTH_TEST_NEVER UINT64_C(0x0000000000000070)
#define BGFX_STATE_DEPTH_TEST_ALWAYS UINT64_C(0x0000000000000080)
#define BGFX_STATE_DEPTH_TEST_SHIFT 4
#define BGFX_STATE_DEPTH_TEST_MASK UINT64_C(0x00000000000000f0)
#define BGFX_STATE_BLEND_ZERO UINT64_C(0x0000000000001000)
#define BGFX_STATE_BLEND_ONE UINT64_C(0x0000000000002000)
#define BGFX_STATE_BLEND_SRC_COLOR UINT64_C(0x0000000000003000)
#define BGFX_STATE_BLEND_INV_SRC_COLOR UINT64_C(0x0000000000004000)
#define BGFX_STATE_BLEND_SRC_ALPHA UINT64_C(0x0000000000005000)
#define BGFX_STATE_BLEND_INV_SRC_ALPHA UINT64_C(0x0000000000006000)
#define BGFX_STATE_BLEND_DST_ALPHA UINT64_C(0x0000000000007000)
#define BGFX_STATE_BLEND_INV_DST_ALPHA UINT64_C(0x0000000000008000)
#define BGFX_STATE_BLEND_DST_COLOR UINT64_C(0x0000000000009000)
#define BGFX_STATE_BLEND_INV_DST_COLOR UINT64_C(0x000000000000a000)
#define BGFX_STATE_BLEND_SRC_ALPHA_SAT UINT64_C(0x000000000000b000)
#define BGFX_STATE_BLEND_FACTOR UINT64_C(0x000000000000c000)
#define BGFX_STATE_BLEND_INV_FACTOR UINT64_C(0x000000000000d000)
#define BGFX_STATE_BLEND_SHIFT 12
#define BGFX_STATE_BLEND_MASK UINT64_C(0x00000000000ff000)
#define BGFX_STATE_BLEND_EQUATION_SUB UINT64_C(0x0000000000100000)
#define BGFX_STATE_BLEND_EQUATION_REVSUB UINT64_C(0x0000000000200000)
#define BGFX_STATE_BLEND_EQUATION_MIN UINT64_C(0x0000000000300000)
#define BGFX_STATE_BLEND_EQUATION_MAX UINT64_C(0x0000000000400000)
#define BGFX_STATE_BLEND_EQUATION_SHIFT 20
#define BGFX_STATE_BLEND_EQUATION_MASK UINT64_C(0x0000000000700000)
#define BGFX_STATE_CULL_CW UINT64_C(0x0000000010000000)
#define BGFX_STATE_CULL_CCW UINT64_C(0x0000000020000000)
#define BGFX_STATE_CULL_SHIFT 28
#define BGFX_STATE_CULL_MASK UINT64_C(0x0000000030000000)
#define BGFX_STATE_RGB_WRITE UINT64_C(0x0000000040000000)
#define BGFX_STATE_ALPHA_REF_SHIFT 32
#define BGFX_STATE_ALPHA_REF_MASK UINT64_C(0x000000ff00000000)
#define BGFX_STATE_PT_LINES UINT64_C(0x0000010000000000)
#define BGFX_STATE_PT_POINTS UINT64_C(0x0000020000000000)
#define BGFX_STATE_PT_SHIFT 40
#define BGFX_STATE_PT_MASK UINT64_C(0x0000030000000000)
#define BGFX_STATE_POINT_SIZE_SHIFT 44
#define BGFX_STATE_POINT_SIZE_MASK UINT64_C(0x000ff00000000000)
#define BGFX_STATE_MSAA UINT64_C(0x0020000000000000)
#define BGFX_STATE_RESERVED_MASK UINT64_C(0xff00000000000000)
#define BGFX_STATE_NONE UINT64_C(0x0000000000000000)
#define BGFX_STATE_MASK UINT64_C(0xffffffffffffffff)
#define BGFX_STATE_DEFAULT (0 \
| BGFX_STATE_RGB_WRITE \
| BGFX_STATE_ALPHA_WRITE \
| BGFX_STATE_DEPTH_TEST_LESS \
| BGFX_STATE_DEPTH_WRITE \
| BGFX_STATE_CULL_CW \
| BGFX_STATE_MSAA \
)
#define BGFX_STATE_ALPHA_REF(_ref) ( (uint64_t(_ref)<<BGFX_STATE_ALPHA_REF_SHIFT)&BGFX_STATE_ALPHA_REF_MASK)
#define BGFX_STATE_POINT_SIZE(_size) ( (uint64_t(_size)<<BGFX_STATE_POINT_SIZE_SHIFT)&BGFX_STATE_POINT_SIZE_MASK)
#define BGFX_STATE_BLEND_FUNC(_src, _dst) ( uint64_t(_src)|( uint64_t(_dst)<<4) )
#define BGFX_STATE_BLEND_ADD (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE ) )
#define BGFX_STATE_BLEND_ALPHA (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_COLOR) )
#define BGFX_STATE_BLEND_DARKEN (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE ) | BGFX_STATE_BLEND_EQUATION_MIN)
#define BGFX_STATE_BLEND_LIGHTEN (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE ) | BGFX_STATE_BLEND_EQUATION_MAX)
#define BGFX_STATE_BLEND_MULTIPLY (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_DST_COLOR, BGFX_STATE_BLEND_ZERO ) )
#define BGFX_STATE_BLEND_NORMAL (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_INV_SRC_ALPHA) )
#define BGFX_STATE_BLEND_SCREEN (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_INV_SRC_COLOR) )
#define BGFX_STATE_BLEND_LINEAR_BURN (BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_DST_COLOR, BGFX_STATE_BLEND_INV_DST_COLOR) | BGFX_STATE_BLEND_EQUATION_SUB)
///
#define BGFX_STENCIL_FUNC_REF_SHIFT 0
#define BGFX_STENCIL_FUNC_REF_MASK UINT32_C(0x000000ff)
#define BGFX_STENCIL_FUNC_RMASK_SHIFT 8
#define BGFX_STENCIL_FUNC_RMASK_MASK UINT32_C(0x0000ff00)
#define BGFX_STENCIL_TEST_LESS UINT32_C(0x00010000)
#define BGFX_STENCIL_TEST_LEQUAL UINT32_C(0x00020000)
#define BGFX_STENCIL_TEST_EQUAL UINT32_C(0x00030000)
#define BGFX_STENCIL_TEST_GEQUAL UINT32_C(0x00040000)
#define BGFX_STENCIL_TEST_GREATER UINT32_C(0x00050000)
#define BGFX_STENCIL_TEST_NOTEQUAL UINT32_C(0x00060000)
#define BGFX_STENCIL_TEST_NEVER UINT32_C(0x00070000)
#define BGFX_STENCIL_TEST_ALWAYS UINT32_C(0x00080000)
#define BGFX_STENCIL_TEST_SHIFT 16
#define BGFX_STENCIL_TEST_MASK UINT32_C(0x000f0000)
#define BGFX_STENCIL_OP_FAIL_S_ZERO UINT32_C(0x00000000)
#define BGFX_STENCIL_OP_FAIL_S_KEEP UINT32_C(0x00100000)
#define BGFX_STENCIL_OP_FAIL_S_REPLACE UINT32_C(0x00200000)
#define BGFX_STENCIL_OP_FAIL_S_INCR UINT32_C(0x00300000)
#define BGFX_STENCIL_OP_FAIL_S_INCRSAT UINT32_C(0x00400000)
#define BGFX_STENCIL_OP_FAIL_S_DECR UINT32_C(0x00500000)
#define BGFX_STENCIL_OP_FAIL_S_DECRSAT UINT32_C(0x00600000)
#define BGFX_STENCIL_OP_FAIL_S_INVERT UINT32_C(0x00700000)
#define BGFX_STENCIL_OP_FAIL_S_SHIFT 20
#define BGFX_STENCIL_OP_FAIL_S_MASK UINT32_C(0x00f00000)
#define BGFX_STENCIL_OP_FAIL_Z_ZERO UINT32_C(0x00000000)
#define BGFX_STENCIL_OP_FAIL_Z_KEEP UINT32_C(0x01000000)
#define BGFX_STENCIL_OP_FAIL_Z_REPLACE UINT32_C(0x02000000)
#define BGFX_STENCIL_OP_FAIL_Z_INCR UINT32_C(0x03000000)
#define BGFX_STENCIL_OP_FAIL_Z_INCRSAT UINT32_C(0x04000000)
#define BGFX_STENCIL_OP_FAIL_Z_DECR UINT32_C(0x05000000)
#define BGFX_STENCIL_OP_FAIL_Z_DECRSAT UINT32_C(0x06000000)
#define BGFX_STENCIL_OP_FAIL_Z_INVERT UINT32_C(0x07000000)
#define BGFX_STENCIL_OP_FAIL_Z_SHIFT 24
#define BGFX_STENCIL_OP_FAIL_Z_MASK UINT32_C(0x0f000000)
#define BGFX_STENCIL_OP_PASS_Z_ZERO UINT32_C(0x00000000)
#define BGFX_STENCIL_OP_PASS_Z_KEEP UINT32_C(0x10000000)
#define BGFX_STENCIL_OP_PASS_Z_REPLACE UINT32_C(0x20000000)
#define BGFX_STENCIL_OP_PASS_Z_INCR UINT32_C(0x30000000)
#define BGFX_STENCIL_OP_PASS_Z_INCRSAT UINT32_C(0x40000000)
#define BGFX_STENCIL_OP_PASS_Z_DECR UINT32_C(0x50000000)
#define BGFX_STENCIL_OP_PASS_Z_DECRSAT UINT32_C(0x60000000)
#define BGFX_STENCIL_OP_PASS_Z_INVERT UINT32_C(0x70000000)
#define BGFX_STENCIL_OP_PASS_Z_SHIFT 28
#define BGFX_STENCIL_OP_PASS_Z_MASK UINT32_C(0xf0000000)
#define BGFX_STENCIL_NONE UINT32_C(0x00000000)
#define BGFX_STENCIL_MASK UINT32_C(0xffffffff)
#define BGFX_STENCIL_DEFAULT UINT32_C(0x00000000)
#define BGFX_STENCIL_FUNC_REF(_ref) ( (uint32_t(_ref)<<BGFX_STENCIL_FUNC_REF_SHIFT)&BGFX_STENCIL_FUNC_REF_MASK)
#define BGFX_STENCIL_FUNC_RMASK(_mask) ( (uint32_t(_mask)<<BGFX_STENCIL_FUNC_RMASK_SHIFT)&BGFX_STENCIL_FUNC_RMASK_MASK)
///
#define BGFX_CLEAR_NONE UINT8_C(0x00)
#define BGFX_CLEAR_COLOR_BIT UINT8_C(0x01)
#define BGFX_CLEAR_DEPTH_BIT UINT8_C(0x02)
#define BGFX_CLEAR_STENCIL_BIT UINT8_C(0x04)
///
#define BGFX_DEBUG_NONE UINT32_C(0x00000000)
#define BGFX_DEBUG_WIREFRAME UINT32_C(0x00000001)
#define BGFX_DEBUG_IFH UINT32_C(0x00000002)
#define BGFX_DEBUG_STATS UINT32_C(0x00000004)
#define BGFX_DEBUG_TEXT UINT32_C(0x00000008)
///
#define BGFX_TEXTURE_NONE UINT32_C(0x00000000)
#define BGFX_TEXTURE_U_MIRROR UINT32_C(0x00000001)
#define BGFX_TEXTURE_U_CLAMP UINT32_C(0x00000002)
#define BGFX_TEXTURE_U_SHIFT 0
#define BGFX_TEXTURE_U_MASK UINT32_C(0x00000003)
#define BGFX_TEXTURE_V_MIRROR UINT32_C(0x00000010)
#define BGFX_TEXTURE_V_CLAMP UINT32_C(0x00000020)
#define BGFX_TEXTURE_V_SHIFT 4
#define BGFX_TEXTURE_V_MASK UINT32_C(0x00000030)
#define BGFX_TEXTURE_W_MIRROR UINT32_C(0x00000100)
#define BGFX_TEXTURE_W_CLAMP UINT32_C(0x00000200)
#define BGFX_TEXTURE_W_SHIFT 8
#define BGFX_TEXTURE_W_MASK UINT32_C(0x00000300)
#define BGFX_TEXTURE_MIN_POINT UINT32_C(0x00001000)
#define BGFX_TEXTURE_MIN_ANISOTROPIC UINT32_C(0x00002000)
#define BGFX_TEXTURE_MIN_SHIFT 12
#define BGFX_TEXTURE_MIN_MASK UINT32_C(0x00003000)
#define BGFX_TEXTURE_MAG_POINT UINT32_C(0x00010000)
#define BGFX_TEXTURE_MAG_ANISOTROPIC UINT32_C(0x00020000)
#define BGFX_TEXTURE_MAG_SHIFT 16
#define BGFX_TEXTURE_MAG_MASK UINT32_C(0x00030000)
#define BGFX_TEXTURE_MIP_POINT UINT32_C(0x00100000)
#define BGFX_TEXTURE_MIP_SHIFT 20
#define BGFX_TEXTURE_MIP_MASK UINT32_C(0x00100000)
#define BGFX_TEXTURE_RESERVED_MASK UINT32_C(0xf0000000)
///
#define BGFX_RENDER_TARGET_NONE UINT32_C(0x00000000)
#define BGFX_RENDER_TARGET_COLOR_RGBA8 UINT32_C(0x00000001)
#define BGFX_RENDER_TARGET_COLOR_RGB10A2 UINT32_C(0x00000002)
#define BGFX_RENDER_TARGET_COLOR_RGBA16 UINT32_C(0x00000003)
#define BGFX_RENDER_TARGET_COLOR_RGBA16F UINT32_C(0x00000004)
#define BGFX_RENDER_TARGET_COLOR_R16F UINT32_C(0x00000005)
#define BGFX_RENDER_TARGET_COLOR_R32F UINT32_C(0x00000006)
#define BGFX_RENDER_TARGET_COLOR_SHIFT 0
#define BGFX_RENDER_TARGET_COLOR_MASK UINT32_C(0x000000ff)
#define BGFX_RENDER_TARGET_DEPTH UINT32_C(0x00000100)
#define BGFX_RENDER_TARGET_DEPTH_SHIFT 8
#define BGFX_RENDER_TARGET_DEPTH_MASK UINT32_C(0x0000ff00)
#define BGFX_RENDER_TARGET_MSAA_X2 UINT32_C(0x00010000)
#define BGFX_RENDER_TARGET_MSAA_X4 UINT32_C(0x00020000)
#define BGFX_RENDER_TARGET_MSAA_X8 UINT32_C(0x00030000)
#define BGFX_RENDER_TARGET_MSAA_X16 UINT32_C(0x00040000)
#define BGFX_RENDER_TARGET_MSAA_SHIFT 16
#define BGFX_RENDER_TARGET_MSAA_MASK UINT32_C(0x00070000)
///
#define BGFX_RESET_NONE UINT32_C(0x00000000)
#define BGFX_RESET_FULLSCREEN UINT32_C(0x00000001)
#define BGFX_RESET_FULLSCREEN_SHIFT 0
#define BGFX_RESET_FULLSCREEN_MASK UINT32_C(0x00000001)
#define BGFX_RESET_MSAA_X2 UINT32_C(0x00000010)
#define BGFX_RESET_MSAA_X4 UINT32_C(0x00000020)
#define BGFX_RESET_MSAA_X8 UINT32_C(0x00000030)
#define BGFX_RESET_MSAA_X16 UINT32_C(0x00000040)
#define BGFX_RESET_MSAA_SHIFT 4
#define BGFX_RESET_MSAA_MASK UINT32_C(0x00000070)
#define BGFX_RESET_VSYNC UINT32_C(0x00000080)
#define BGFX_RESET_CAPTURE UINT32_C(0x00000100)
///
#define BGFX_HANDLE(_name) struct _name { uint16_t idx; }
#define BGFX_INVALID_HANDLE { bgfx::invalidHandle }
/// BGFX
namespace bgfx
{
struct Fatal
{
enum Enum
{
DebugCheck,
MinimumRequiredSpecs,
InvalidShader,
UnableToInitialize,
UnableToCreateRenderTarget,
UnableToCreateTexture,
};
};
struct RendererType
{
enum Enum
{
Null,
Direct3D9,
Direct3D11,
OpenGLES2,
OpenGLES3,
OpenGL,
Count
};
};
struct Attrib
{
enum Enum // corresponds to vertex shader attribute:
{
Position, // a_position
Normal, // a_normal
Tangent, // a_tangent
Color0, // a_color0
Color1, // a_color1
Indices, // a_indices
Weight, // a_weight
TexCoord0, // a_texcoord0
TexCoord1, // a_texcoord1
TexCoord2, // a_texcoord2
TexCoord3, // a_texcoord3
TexCoord4, // a_texcoord4
TexCoord5, // a_texcoord5
TexCoord6, // a_texcoord6
TexCoord7, // a_texcoord7
Count
};
};
struct AttribType
{
enum Enum
{
Uint8,
Int16,
Half,
Float,
Count
};
};
struct TextureFormat
{
enum Enum
{
BC1, // DXT1
BC2, // DXT3
BC3, // DXT5
BC4, // LATC1/ATI1
BC5, // LATC2/ATI2
Unknown,
L8,
BGRX8,
BGRA8,
RGBA16,
RGBA16F,
R5G6B5,
RGBA4,
RGB5A1,
RGB10A2,
Count
};
};
struct UniformType
{
enum Enum
{
Uniform1i,
Uniform1f,
End,
Uniform1iv,
Uniform1fv,
Uniform2fv,
Uniform3fv,
Uniform4fv,
Uniform3x3fv,
Uniform4x4fv,
Count
};
};
static const uint16_t invalidHandle = UINT16_MAX;
BGFX_HANDLE(DynamicIndexBufferHandle);
BGFX_HANDLE(DynamicVertexBufferHandle);
BGFX_HANDLE(FragmentShaderHandle);
BGFX_HANDLE(IndexBufferHandle);
BGFX_HANDLE(ProgramHandle);
BGFX_HANDLE(RenderTargetHandle);
BGFX_HANDLE(TextureHandle);
BGFX_HANDLE(UniformHandle);
BGFX_HANDLE(VertexBufferHandle);
BGFX_HANDLE(VertexDeclHandle);
BGFX_HANDLE(VertexShaderHandle);
typedef void* (*ReallocFn)(void* _ptr, size_t _size);
typedef void (*FreeFn)(void* _ptr);
/// Callback interface to implement application specific behavior.
/// Cached items are currently used only for OpenGL binary shaders.
///
/// NOTE:
/// 'fatal' callback can be called from any thread. Other callbacks
/// are called from the render thread.
///
struct CallbackI
{
virtual ~CallbackI() = 0;
/// If fatal code code is not Fatal::DebugCheck this callback is
/// called on unrecoverable error. It's not safe to continue, inform
/// user and terminate application from this call.
virtual void fatal(Fatal::Enum _code, const char* _str) = 0;
/// Return size of for cached item. Return 0 if no cached item was
/// found.
virtual uint32_t cacheReadSize(uint64_t _id) = 0;
/// Read cached item.
virtual bool cacheRead(uint64_t _id, void* _data, uint32_t _size) = 0;
/// Write cached item.
virtual void cacheWrite(uint64_t _id, const void* _data, uint32_t _size) = 0;
/// Screenshot captured. Screenshot format is always 4-byte BGRA.
virtual void screenShot(const char* _filePath, uint32_t _width, uint32_t _height, uint32_t _pitch, const void* _data, uint32_t _size, bool _yflip) = 0;
/// Called when capture begins.
virtual void captureBegin(uint32_t _width, uint32_t _height, uint32_t _pitch, bgfx::TextureFormat::Enum _format, bool _yflip) = 0;
/// Called when capture ends.
virtual void captureEnd() = 0;
/// Captured frame.
virtual void captureFrame(const void* _data, uint32_t _size) = 0;
};
inline CallbackI::~CallbackI()
{
}
struct Memory
{
uint8_t* data;
uint32_t size;
};
struct TransientIndexBuffer
{
uint8_t* data;
uint32_t size;
IndexBufferHandle handle;
uint32_t startIndex;
};
struct TransientVertexBuffer
{
uint8_t* data;
uint32_t size;
uint32_t startVertex;
uint16_t stride;
VertexBufferHandle handle;
VertexDeclHandle decl;
};
struct InstanceDataBuffer
{
uint8_t* data;
uint32_t size;
uint32_t offset;
uint16_t stride;
uint16_t num;
VertexBufferHandle handle;
};
struct TextureInfo
{
TextureFormat::Enum format;
uint32_t storageSize;
uint16_t width;
uint16_t height;
uint16_t depth;
uint8_t numMips;
uint8_t bitsPerPixel;
};
/// Vertex declaration.
struct VertexDecl
{
/// Start VertexDecl.
void begin(RendererType::Enum _renderer = RendererType::Null);
/// End VertexDecl.
void end();
/// Add attribute to VertexDecl.
///
/// @param _attrib Attribute semantics.
/// @param _num Number of elements 1, 2, 3 or 4.
/// @param _type Element type.
/// @param _normalized When using fixed point AttribType (f.e. Uint8)
/// value will be normalized for vertex shader usage. When normalized
/// is set to true, AttribType::Uint8 value in range 0-255 will be
/// in range 0.0-1.0 in vertex shader.
/// @param _asInt Packaging rule for vertexPack, vertexUnpack, and
/// vertexConvert for AttribType::Uint8 and AttribType::Int16.
/// Unpacking code must be implemented inside vertex shader.
///
/// NOTE:
/// Must be called between begin/end.
///
void add(Attrib::Enum _attrib, uint8_t _num, AttribType::Enum _type, bool _normalized = false, bool _asInt = false);
/// Decode attribute.
void decode(Attrib::Enum _attrib, uint8_t& _num, AttribType::Enum& _type, bool& _normalized, bool& _asInt) const;
/// Returns true if VertexDecl contains attribute.
bool has(Attrib::Enum _attrib) const { return 0xff != m_attributes[_attrib]; }
/// Returns relative attribute offset from the vertex.
uint16_t getOffset(Attrib::Enum _attrib) const { return m_offset[_attrib]; }
/// Returns vertex stride.
uint16_t getStride() const { return m_stride; }
/// Returns size of vertex buffer for number of vertices.
uint32_t getSize(uint32_t _num) const { return _num*m_stride; }
uint32_t m_hash;
uint16_t m_stride;
uint16_t m_offset[Attrib::Count];
uint8_t m_attributes[Attrib::Count];
};
/// Pack vec4 into vertex stream format.
void vertexPack(const float _input[4], bool _inputNormalized, Attrib::Enum _attr, const VertexDecl& _decl, void* _data, uint32_t _index = 0);
/// Unpack vec4 from vertex stream format.
void vertexUnpack(float _output[4], Attrib::Enum _attr, const VertexDecl& _decl, const void* _data, uint32_t _index = 0);
/// Converts vertex stream data from one vertex stream format to another.
///
/// @param _destDecl Destination vertex stream declaration.
/// @param _destData Destination vertex stream.
/// @param _srcDecl Source vertex stream declaration.
/// @param _srcData Source vertex stream data.
/// @param _num Number of vertices to convert from source to destination.
///
void vertexConvert(const VertexDecl& _destDecl, void* _destData, const VertexDecl& _srcDecl, const void* _srcData, uint32_t _num = 1);
/// Returns renderer backend API type.
RendererType::Enum getRendererType();
/// Initialize bgfx library.
///
/// @param _callback Provide application specific callback interface.
/// See: CallbackI
///
/// @param _realloc Custom realloc function.
/// @param _free Custom free function.
///
/// NOTE: In order to properly set custom allocator realloc and free,
/// both functions must be provided. When custom allocator is not
/// specified, library uses default CRT allocator. The library assumes
/// custom allocator is thread safe.
///
void init(CallbackI* _callback = NULL, ReallocFn _realloc = NULL, FreeFn _free = NULL);
/// Shutdown bgfx library.
void shutdown();
/// Reset graphic settings.
void reset(uint32_t _width, uint32_t _height, uint32_t _flags = BGFX_RESET_NONE);
/// Advance to next frame. When using multithreaded renderer, this call
/// just swaps internal buffers, kicks render thread, and returns. In
/// singlethreaded renderer this call does frame rendering.
void frame();
/// Allocate buffer to pass to bgfx calls. Data will be freed inside bgfx.
const Memory* alloc(uint32_t _size);
/// Make reference to data to pass to bgfx. Unlike bgfx::alloc this call
/// doesn't allocate memory for data. It just copies pointer to data.
/// You must make sure data is available for at least 2 bgfx::frame calls.
const Memory* makeRef(const void* _data, uint32_t _size);
/// Set debug flags.
///
/// @param _debug Available flags:
///
/// BGFX_DEBUG_IFH - Infinitely fast hardware. When this flag is set
/// all rendering calls will be skipped. It's useful when profiling
/// to quickly assess bottleneck between CPU and GPU.
///
/// BGFX_DEBUG_STATS - Display internal statistics.
///
/// BGFX_DEBUG_TEXT - Display debug text.
///
/// BGFX_DEBUG_WIREFRAME - Wireframe rendering. All rendering
/// primitives will be rendered as lines.
///
void setDebug(uint32_t _debug);
/// Clear internal debug text buffer.
void dbgTextClear(uint8_t _attr = 0, bool _small = false);
/// Print into internal debug text buffer.
void dbgTextPrintf(uint16_t _x, uint16_t _y, uint8_t _attr, const char* _format, ...);
/// Create static index buffer.
IndexBufferHandle createIndexBuffer(const Memory* _mem);
/// Destroy static index buffer.
void destroyIndexBuffer(IndexBufferHandle _handle);
/// Create static vertex buffer.
VertexBufferHandle createVertexBuffer(const Memory* _mem, const VertexDecl& _decl);
/// Destroy static vertex buffer.
void destroyVertexBuffer(VertexBufferHandle _handle);
/// Create empty dynamic index buffer.
DynamicIndexBufferHandle createDynamicIndexBuffer(uint16_t _num);
/// Create dynamic index buffer and initialized it.
DynamicIndexBufferHandle createDynamicIndexBuffer(const Memory* _mem);
/// Update dynamic index buffer.
void updateDynamicIndexBuffer(DynamicIndexBufferHandle _handle, const Memory* _mem);
/// Destroy dynamic index buffer.
void destroyDynamicIndexBuffer(DynamicIndexBufferHandle _handle);
/// Create empty dynamic vertex buffer.
DynamicVertexBufferHandle createDynamicVertexBuffer(uint16_t _num, const VertexDecl& _decl);
/// Create dynamic vertex buffer and initialize it.
DynamicVertexBufferHandle createDynamicVertexBuffer(const Memory* _mem, const VertexDecl& _decl);
/// Update dynamic vertex buffer.
void updateDynamicVertexBuffer(DynamicVertexBufferHandle _handle, const Memory* _mem);
/// Destroy dynamic vertex buffer.
void destroyDynamicVertexBuffer(DynamicVertexBufferHandle _handle);
/// Returns true if internal transient index buffer has enough space.
///
/// @param _num Number of indices.
///
bool checkAvailTransientIndexBuffer(uint32_t _num);
/// Returns true if internal transient vertex buffer has enough space.
///
/// @param _num Number of vertices.
/// @param _decl Vertex declaration.
///
bool checkAvailTransientVertexBuffer(uint32_t _num, const VertexDecl& _decl);
/// Returns true if internal instance data buffer has enough space.
///
/// @param _num Number of instances.
/// @param _stride Stride per instance.
///
bool checkAvailInstanceDataBuffer(uint32_t _num, uint16_t _stride);
/// Returns true if both internal transient index and vertex buffer have
/// enough space.
///
/// @param _numVertices Number of vertices.
/// @param _decl Vertex declaration.
/// @param _numIndices Number of indices.
///
bool checkAvailTransientBuffers(uint32_t _numVertices, const VertexDecl& _decl, uint32_t _numIndices);
/// Allocate transient index buffer.
///
/// @param[out] _tib TransientIndexBuffer structure is filled and is valid
/// for the duration of frame, and it can be reused for multiple draw
/// calls.
/// @param _num Number of indices to allocate.
///
/// NOTE:
/// You must call setIndexBuffer after alloc in order to avoid memory
/// leak.
///
void allocTransientIndexBuffer(TransientIndexBuffer* _tib, uint32_t _num);
/// Allocate transient vertex buffer.
///
/// @param[out] _tvb TransientVertexBuffer structure is filled and is valid
/// for the duration of frame, and it can be reused for multiple draw
/// calls.
/// @param _num Number of vertices to allocate.
/// @param _decl Vertex declaration.
///
/// NOTE:
/// You must call setVertexBuffer after alloc in order to avoid memory
/// leak.
///
void allocTransientVertexBuffer(TransientVertexBuffer* _tvb, uint32_t _num, const VertexDecl& _decl);
/// Allocate instance data buffer.
///
/// NOTE:
/// You must call setInstanceDataBuffer after alloc in order to avoid
/// memory leak.
///
const InstanceDataBuffer* allocInstanceDataBuffer(uint32_t _num, uint16_t _stride);
/// Create vertex shader from memory buffer.
VertexShaderHandle createVertexShader(const Memory* _mem);
/// Destroy vertex shader. Once program is created with vertex shader
/// it is safe to destroy vertex shader.
void destroyVertexShader(VertexShaderHandle _handle);
/// Create fragment shader from memory buffer.
FragmentShaderHandle createFragmentShader(const Memory* _mem);
/// Destroy fragment shader. Once program is created with fragment shader
/// it is safe to destroy fragment shader.
void destroyFragmentShader(FragmentShaderHandle _handle);
/// Create program with vertex and fragment shaders.
///
/// @param _vsh Vertex shader.
/// @param _fsh Fragment shader.
/// @returns Program handle if vertex shader output and fragment shader
/// input are matching, otherwise returns invalid program handle.
///
ProgramHandle createProgram(VertexShaderHandle _vsh, FragmentShaderHandle _fsh);
/// Destroy program.
void destroyProgram(ProgramHandle _handle);
/// Calculate amount of memory required for texture.
void calcTextureSize(TextureInfo& _info, uint16_t _width, uint16_t _height, uint16_t _depth, uint8_t _numMips, TextureFormat::Enum _format);
/// Create texture from memory buffer.
///
/// @param _mem DDS texture data.
/// @param _flags Default texture sampling mode is linear, and wrap mode
/// is repeat.
///
/// BGFX_TEXTURE_[U/V/W]_[MIRROR/CLAMP] - Mirror or clamp to edge wrap
/// mode.
///
/// BGFX_TEXTURE_[MIN/MAG/MIP]_[POINT/ANISOTROPIC] - Point or anisotropic
/// sampling.
///
/// @param _info Returns parsed DDS texture information.
/// @returns Texture handle.
///
TextureHandle createTexture(const Memory* _mem, uint32_t _flags = BGFX_TEXTURE_NONE, TextureInfo* _info = NULL);
/// Create 2D texture.
TextureHandle createTexture2D(uint16_t _width, uint16_t _height, uint8_t _numMips, TextureFormat::Enum _format, uint32_t _flags = BGFX_TEXTURE_NONE, const Memory* _mem = NULL);
/// Create 3D texture.
TextureHandle createTexture3D(uint16_t _width, uint16_t _height, uint16_t _depth, uint8_t _numMips, TextureFormat::Enum _format, uint32_t _flags = BGFX_TEXTURE_NONE, const Memory* _mem = NULL);
/// Create Cube texture.
TextureHandle createTextureCube(uint16_t _sides, uint16_t _width, uint8_t _numMips, TextureFormat::Enum _format, uint32_t _flags = BGFX_TEXTURE_NONE, const Memory* _mem = NULL);
/// Update 2D texture.
void updateTexture2D(TextureHandle _handle, uint8_t _mip, uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height, const Memory* _mem);
/// Update 3D texture.
void updateTexture3D(TextureHandle _handle, uint8_t _mip, uint16_t _x, uint16_t _y, uint16_t _z, uint16_t _width, uint16_t _height, uint16_t _depth, const Memory* _mem);
/// Update Cube texture.
///
/// @param _side Cubemap side, where 0 is +X, 1 is -X, 2 is +Y, 3 is
/// -Y, 4 is +Z, and 5 is -Z.
///
void updateTextureCube(TextureHandle _handle, uint8_t _side, uint8_t _mip, uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height, const Memory* _mem);
/// Destroy texture.
void destroyTexture(TextureHandle _handle);
/// Create render target.
RenderTargetHandle createRenderTarget(uint16_t _width, uint16_t _height, uint32_t _flags = BGFX_RENDER_TARGET_COLOR_RGBA8, uint32_t _textureFlags = BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP);
/// Destroy render target.
void destroyRenderTarget(RenderTargetHandle _handle);
/// Create shader uniform parameter.
UniformHandle createUniform(const char* _name, UniformType::Enum _type, uint16_t _num = 1);
/// Destroy shader uniform parameter.
void destroyUniform(UniformHandle _handle);
/// Set view name.
///
/// @param _id View id.
/// @param _name View name.
///
/// NOTE:
/// This is debug only feature.
///
void setViewName(uint8_t _id, const char* _name);
/// Set view rectangle. Draw primitive outside view will be clipped.
void setViewRect(uint8_t _id, uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height);
/// Set view rectangle for multiple views.
void setViewRectMask(uint32_t _viewMask, uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height);
/// Set view scissor. Draw primitive outside view will be clipped. When
/// _x, _y, _width and _height are set to 0, scissor will be disabled.
void setViewScissor(uint8_t _id, uint16_t _x = 0, uint16_t _y = 0, uint16_t _width = 0, uint16_t _height = 0);
/// Set view scissor for multiple views. When _x, _y, _width and _height
/// are set to 0, scissor will be disabled.
void setViewScissorMask(uint32_t _viewMask, uint16_t _x = 0, uint16_t _y = 0, uint16_t _width = 0, uint16_t _height = 0);
/// Set view clear flags.
///
/// @param _id View id.
/// @param _flags Clear flags. Use BGFX_CLEAR_NONE to remove any clear
/// operation. See: BGFX_CLEAR_*.
/// @param _rgba Color clear value.
/// @param _depth Depth clear value.
/// @param _stencil Stencil clear value.
///
void setViewClear(uint8_t _id, uint8_t _flags, uint32_t _rgba = 0x000000ff, float _depth = 1.0f, uint8_t _stencil = 0);
/// Set view clear flags for multiple views.
void setViewClearMask(uint32_t _viewMask, uint8_t _flags, uint32_t _rgba = 0x000000ff, float _depth = 1.0f, uint8_t _stencil = 0);
/// Set view into sequential mode. Draw calls will be sorted in the same
/// order in which submit calls were called.
void setViewSeq(uint8_t _id, bool _enabled);
/// Set mulitple views into sequential mode.
void setViewSeqMask(uint32_t _viewMask, bool _enabled);
/// Set view render target.
///
/// @param _id View id.
/// @param _handle Render target handle. Passing BGFX_INVALID_HANDLE as
/// render target handle will draw primitives from this view into
/// default backbuffer.
///
void setViewRenderTarget(uint8_t _id, RenderTargetHandle _handle);
/// Set view render target for multiple views.
///
/// @param _viewMask View mask.
/// @param _handle Render target handle. Passing BGFX_INVALID_HANDLE as
/// render target handle will draw primitives from this view into
/// default backbuffer.
///
void setViewRenderTargetMask(uint32_t _viewMask, RenderTargetHandle _handle);
/// Set view view and projection matrices, all draw primitives in this
/// view will use these matrices.
void setViewTransform(uint8_t _id, const void* _view, const void* _proj, uint8_t _other = 0xff);
/// Set view view and projection matrices for multiple views.
void setViewTransformMask(uint32_t _viewMask, const void* _view, const void* _proj, uint8_t _other = 0xff);
/// Sets debug marker.
void setMarker(const char* _marker);
/// Set render states for draw primitive.
///
/// @param _state State flags. Default state for primitive type is
/// triangles. See: BGFX_STATE_DEFAULT.
///
/// BGFX_STATE_ALPHA_WRITE - Enable alpha write.
/// BGFX_STATE_DEPTH_WRITE - Enable depth write.
/// BGFX_STATE_DEPTH_TEST_* - Depth test function.
/// BGFX_STATE_BLEND_* - See NOTE 1: BGFX_STATE_BLEND_FUNC.
/// BGFX_STATE_BLEND_EQUATION_* - See NOTE 2.
/// BGFX_STATE_CULL_* - Backface culling mode.
/// BGFX_STATE_RGB_WRITE - Enable RGB write.
/// BGFX_STATE_MSAA - Enable MSAA.
/// BGFX_STATE_PT_[LINES/POINTS] - Primitive type.
///
/// @param _rgba Sets blend factor used by BGFX_STATE_BLEND_FACTOR and
/// BGFX_STATE_BLEND_INV_FACTOR blend modes.
///
/// NOTE:
/// 1. Use BGFX_STATE_ALPHA_REF, BGFX_STATE_POINT_SIZE and
/// BGFX_STATE_BLEND_FUNC macros to setup more complex states.
/// 2. BGFX_STATE_BLEND_EQUATION_ADD is set when no other blend
/// equation is specified.
///
void setState(uint64_t _state, uint32_t _rgba = UINT32_MAX);
/// Set stencil test state.
///
/// @param _fstencil Front stencil state.
/// @param _bstencil Back stencil state. If back is set to BGFX_STENCIL_NONE
/// _fstencil is applied to both front and back facing primitives.
///
void setStencil(uint32_t _fstencil, uint32_t _bstencil = BGFX_STENCIL_NONE);
/// Set scissor for draw primitive.
uint16_t setScissor(uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height);
/// Set scissor from cache for draw primitive.
///
/// @param _cache Index in scissor cache. Passing UINT16_MAX unset primitive
/// scissor and primitive will use view scissor instead.
///
void setScissor(uint16_t _cache = UINT16_MAX);
/// Set model matrix for draw primitive. If it is not called model will
/// be rendered with identity model matrix.
///
/// @param _mtx Pointer to first matrix in array.
/// @param _num Number of matrices in array.
/// @returns index into matrix cache in case the same model matrix has
/// to be used for other draw primitive call.
///
uint32_t setTransform(const void* _mtx, uint16_t _num = 1);
/// Set model matrix from matrix cache for draw primitive.
///
/// @param _cache Index in matrix cache.
/// @param _num Number of matrices from cache.
///
void setTransform(uint32_t _cache, uint16_t _num = 1);
/// Set shader uniform parameter for draw primitive.
void setUniform(UniformHandle _handle, const void* _value, uint16_t _num = 1);
/// Set index buffer for draw primitive.
void setIndexBuffer(IndexBufferHandle _handle, uint32_t _firstIndex = 0, uint32_t _numIndices = UINT32_MAX);
/// Set index buffer for draw primitive.
void setIndexBuffer(DynamicIndexBufferHandle _handle, uint32_t _firstIndex = 0, uint32_t _numIndices = UINT32_MAX);
/// Set index buffer for draw primitive.
void setIndexBuffer(const TransientIndexBuffer* _tib, uint32_t _numIndices = UINT32_MAX);
/// Set vertex buffer for draw primitive.
void setVertexBuffer(VertexBufferHandle _handle, uint32_t _numVertices = UINT32_MAX);
/// Set vertex buffer for draw primitive.
void setVertexBuffer(DynamicVertexBufferHandle _handle, uint32_t _numVertices = UINT32_MAX);
/// Set vertex buffer for draw primitive.
void setVertexBuffer(const TransientVertexBuffer* _tvb, uint32_t _numVertices = UINT32_MAX);
/// Set instance data buffer for draw primitive.
void setInstanceDataBuffer(const InstanceDataBuffer* _idb, uint16_t _num = UINT16_MAX);
/// Set program for draw primitive.
void setProgram(ProgramHandle _handle);
/// Set texture stage for draw primitive.
///
/// @param _stage Texture unit.
/// @param _sampler Program sampler.
/// @param _handle Texture handle.
/// @param _flags Texture sampling mode. Default value UINT32_MAX uses
/// texture sampling settings from the texture.
///
/// BGFX_TEXTURE_[U/V/W]_[MIRROR/CLAMP] - Mirror or clamp to edge wrap
/// mode.
///
/// BGFX_TEXTURE_[MIN/MAG/MIP]_[POINT/ANISOTROPIC] - Point or anisotropic
/// sampling.
///
/// @param _flags Texture sampler filtering flags. UINT32_MAX use the
/// sampler filtering mode set by texture.
///
void setTexture(uint8_t _stage, UniformHandle _sampler, TextureHandle _handle, uint32_t _flags = UINT32_MAX);
/// Set texture stage for draw primitive.
///
/// @param _stage Texture unit.
/// @param _sampler Program sampler.
/// @param _handle Render target handle.
/// @param _flags Texture sampling mode. Default value UINT32_MAX uses
/// texture sampling settings from the texture.
///
/// BGFX_TEXTURE_[U/V/W]_[MIRROR/CLAMP] - Mirror or clamp to edge wrap
/// mode.
///
/// BGFX_TEXTURE_[MIN/MAG/MIP]_[POINT/ANISOTROPIC] - Point or anisotropic
/// sampling.
///
void setTexture(uint8_t _stage, UniformHandle _sampler, RenderTargetHandle _handle, bool _depth = false, uint32_t _flags = UINT32_MAX);
/// Submit primitive for rendering into single view.
///
/// @param _id View id.
/// @param _depth Depth for sorting.
///
void submit(uint8_t _id, int32_t _depth = 0);
/// Submit primitive for rendering into multiple views.
///
/// @param _viewMask Mask to which views to submit draw primitive calls.
/// @param _depth Depth for sorting.
///
void submitMask(uint32_t _viewMask, int32_t _depth = 0);
/// Discard all previously set state for draw call.
void discard();
/// Request screen shot.
void saveScreenShot(const char* _filePath);
} // namespace bgfx
#endif // __BGFX_H__
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