irrlicht/source/Irrlicht/COpenGLDriver.h

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in Irrlicht.h
#ifndef __C_VIDEO_OPEN_GL_H_INCLUDED__
#define __C_VIDEO_OPEN_GL_H_INCLUDED__
#include "IrrCompileConfig.h"
#include "SIrrCreationParameters.h"
namespace irr
{
class CIrrDeviceWin32;
class CIrrDeviceLinux;
class CIrrDeviceSDL;
class CIrrDeviceMacOSX;
}
#ifdef _IRR_COMPILE_WITH_OPENGL_
#include "IMaterialRendererServices.h"
#include "CNullDriver.h"
#include "COpenGLExtensionHandler.h"
#include "IContextManager.h"
namespace irr
{
namespace video
{
class IContextManager;
class COpenGLDriver : public CNullDriver, public IMaterialRendererServices, public COpenGLExtensionHandler
{
public:
// Information about state of fixed pipeline activity.
enum E_OPENGL_FIXED_PIPELINE_STATE
{
EOFPS_ENABLE = 0, // fixed pipeline.
EOFPS_DISABLE, // programmable pipeline.
EOFPS_ENABLE_TO_DISABLE, // switch from fixed to programmable pipeline.
EOFPS_DISABLE_TO_ENABLE // switch from programmable to fixed pipeline.
};
COpenGLDriver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, IContextManager* contextManager);
bool initDriver();
//! destructor
virtual ~COpenGLDriver();
virtual bool beginScene(u16 clearFlag, SColor clearColor = SColor(255,0,0,0), f32 clearDepth = 1.f, u8 clearStencil = 0,
const SExposedVideoData& videoData = SExposedVideoData(), core::rect<s32>* sourceRect = 0) override;
bool endScene() override;
//! sets transformation
void setTransform(E_TRANSFORMATION_STATE state, const core::matrix4& mat) override;
struct SHWBufferLink_opengl : public SHWBufferLink
{
SHWBufferLink_opengl(const scene::IMeshBuffer *_MeshBuffer): SHWBufferLink(_MeshBuffer), vbo_verticesID(0),vbo_indicesID(0){}
GLuint vbo_verticesID; //tmp
GLuint vbo_indicesID; //tmp
GLuint vbo_verticesSize; //tmp
GLuint vbo_indicesSize; //tmp
};
//! updates hardware buffer if needed
bool updateHardwareBuffer(SHWBufferLink *HWBuffer) override;
//! Create hardware buffer from mesh
SHWBufferLink *createHardwareBuffer(const scene::IMeshBuffer* mb) override;
//! Delete hardware buffer (only some drivers can)
void deleteHardwareBuffer(SHWBufferLink *HWBuffer) override;
//! Draw hardware buffer
void drawHardwareBuffer(SHWBufferLink *HWBuffer) override;
//! Create occlusion query.
/** Use node for identification and mesh for occlusion test. */
virtual void addOcclusionQuery(scene::ISceneNode* node,
const scene::IMesh* mesh=0) override;
//! Remove occlusion query.
void removeOcclusionQuery(scene::ISceneNode* node) override;
//! Run occlusion query. Draws mesh stored in query.
/** If the mesh shall not be rendered visible, use
overrideMaterial to disable the color and depth buffer. */
void runOcclusionQuery(scene::ISceneNode* node, bool visible=false) override;
//! Update occlusion query. Retrieves results from GPU.
/** If the query shall not block, set the flag to false.
Update might not occur in this case, though */
void updateOcclusionQuery(scene::ISceneNode* node, bool block=true) override;
//! Return query result.
/** Return value is the number of visible pixels/fragments.
The value is a safe approximation, i.e. can be larger then the
actual value of pixels. */
u32 getOcclusionQueryResult(scene::ISceneNode* node) const override;
//! Create render target.
IRenderTarget* addRenderTarget() override;
//! draws a vertex primitive list
virtual void drawVertexPrimitiveList(const void* vertices, u32 vertexCount,
const void* indexList, u32 primitiveCount,
E_VERTEX_TYPE vType, scene::E_PRIMITIVE_TYPE pType, E_INDEX_TYPE iType) override;
//! draws a vertex primitive list in 2d
virtual void draw2DVertexPrimitiveList(const void* vertices, u32 vertexCount,
const void* indexList, u32 primitiveCount,
E_VERTEX_TYPE vType, scene::E_PRIMITIVE_TYPE pType, E_INDEX_TYPE iType) override;
//! queries the features of the driver, returns true if feature is available
bool queryFeature(E_VIDEO_DRIVER_FEATURE feature) const override
{
return FeatureEnabled[feature] && COpenGLExtensionHandler::queryFeature(feature);
}
//! Disable a feature of the driver.
void disableFeature(E_VIDEO_DRIVER_FEATURE feature, bool flag=true) override;
//! Sets a material. All 3d drawing functions draw geometry now
//! using this material.
//! \param material: Material to be used from now on.
void setMaterial(const SMaterial& material) override;
virtual void draw2DImage(const video::ITexture* texture, const core::position2d<s32>& destPos,
const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect = 0,
SColor color = SColor(255, 255, 255, 255), bool useAlphaChannelOfTexture = false) override;
virtual void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect,
const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect = 0,
const video::SColor* const colors = 0, bool useAlphaChannelOfTexture = false) override;
// Explicitly bring in base class methods, otherwise
// this overload would hide them.
using CNullDriver::draw2DImage;
virtual void draw2DImage(const video::ITexture* texture, u32 layer, bool flip);
//! draws a set of 2d images, using a color and the alpha channel of the
//! texture if desired.
void draw2DImageBatch(const video::ITexture* texture,
const core::array<core::position2d<s32> >& positions,
const core::array<core::rect<s32> >& sourceRects,
const core::rect<s32>* clipRect,
SColor color,
bool useAlphaChannelOfTexture) override;
//! draws a set of 2d images, using a color and the alpha
/** channel of the texture if desired. The images are drawn
beginning at pos and concatenated in one line. All drawings
are clipped against clipRect (if != 0).
The subtextures are defined by the array of sourceRects
and are chosen by the indices given.
\param texture: Texture to be drawn.
\param pos: Upper left 2d destination position where the image will be drawn.
\param sourceRects: Source rectangles of the image.
\param indices: List of indices which choose the actual rectangle used each time.
\param clipRect: Pointer to rectangle on the screen where the image is clipped to.
This pointer can be 0. Then the image is not clipped.
\param color: Color with which the image is colored.
Note that the alpha component is used: If alpha is other than 255, the image will be transparent.
\param useAlphaChannelOfTexture: If true, the alpha channel of the texture is
used to draw the image. */
virtual void draw2DImageBatch(const video::ITexture* texture,
const core::position2d<s32>& pos,
const core::array<core::rect<s32> >& sourceRects,
const core::array<s32>& indices,
s32 kerningWidth=0,
const core::rect<s32>* clipRect=0,
SColor color=SColor(255,255,255,255),
bool useAlphaChannelOfTexture=false) override;
//! draw an 2d rectangle
virtual void draw2DRectangle(SColor color, const core::rect<s32>& pos,
const core::rect<s32>* clip = 0) override;
//!Draws an 2d rectangle with a gradient.
virtual void draw2DRectangle(const core::rect<s32>& pos,
SColor colorLeftUp, SColor colorRightUp, SColor colorLeftDown, SColor colorRightDown,
const core::rect<s32>* clip = 0) override;
//! Draws a 2d line.
virtual void draw2DLine(const core::position2d<s32>& start,
const core::position2d<s32>& end,
SColor color=SColor(255,255,255,255)) override;
//! Draws a single pixel
void drawPixel(u32 x, u32 y, const SColor & color) override;
//! Draws a 3d box
void draw3DBox( const core::aabbox3d<f32>& box, SColor color = SColor(255,255,255,255 ) ) override;
//! Draws a 3d line.
virtual void draw3DLine(const core::vector3df& start,
const core::vector3df& end,
SColor color = SColor(255,255,255,255)) override;
//! \return Returns the name of the video driver. Example: In case of the Direct3D8
//! driver, it would return "Direct3D8.1".
const wchar_t* getName() const override;
//! Sets the dynamic ambient light color. The default color is
//! (0,0,0,0) which means it is dark.
//! \param color: New color of the ambient light.
void setAmbientLight(const SColorf& color) override;
//! Draws a shadow volume into the stencil buffer. To draw a stencil shadow, do
//! this: First, draw all geometry. Then use this method, to draw the shadow
//! volume. Then, use IVideoDriver::drawStencilShadow() to visualize the shadow.
void drawStencilShadowVolume(const core::array<core::vector3df>& triangles, bool zfail, u32 debugDataVisible=0) override;
//! Fills the stencil shadow with color. After the shadow volume has been drawn
//! into the stencil buffer using IVideoDriver::drawStencilShadowVolume(), use this
//! to draw the color of the shadow.
virtual void drawStencilShadow(bool clearStencilBuffer=false,
video::SColor leftUpEdge = video::SColor(0,0,0,0),
video::SColor rightUpEdge = video::SColor(0,0,0,0),
video::SColor leftDownEdge = video::SColor(0,0,0,0),
video::SColor rightDownEdge = video::SColor(0,0,0,0)) override;
//! sets a viewport
void setViewPort(const core::rect<s32>& area) override;
//! Sets the fog mode.
virtual void setFog(SColor color, E_FOG_TYPE fogType, f32 start,
f32 end, f32 density, bool pixelFog, bool rangeFog) override;
//! Only used by the internal engine. Used to notify the driver that
//! the window was resized.
void OnResize(const core::dimension2d<u32>& size) override;
//! Returns type of video driver
E_DRIVER_TYPE getDriverType() const override;
//! get color format of the current color buffer
ECOLOR_FORMAT getColorFormat() const override;
//! Returns the transformation set by setTransform
const core::matrix4& getTransform(E_TRANSFORMATION_STATE state) const override;
//! Can be called by an IMaterialRenderer to make its work easier.
virtual void setBasicRenderStates(const SMaterial& material, const SMaterial& lastmaterial,
bool resetAllRenderstates) override;
//! Compare in SMaterial doesn't check texture parameters, so we should call this on each OnRender call.
virtual void setTextureRenderStates(const SMaterial& material, bool resetAllRenderstates);
//! Get a vertex shader constant index.
s32 getVertexShaderConstantID(const c8* name) override;
//! Get a pixel shader constant index.
s32 getPixelShaderConstantID(const c8* name) override;
//! Sets a vertex shader constant.
void setVertexShaderConstant(const f32* data, s32 startRegister, s32 constantAmount=1) override;
//! Sets a pixel shader constant.
void setPixelShaderConstant(const f32* data, s32 startRegister, s32 constantAmount=1) override;
//! Sets a constant for the vertex shader based on an index.
bool setVertexShaderConstant(s32 index, const f32* floats, int count) override;
//! Int interface for the above.
bool setVertexShaderConstant(s32 index, const s32* ints, int count) override;
//! Uint interface for the above.
bool setVertexShaderConstant(s32 index, const u32* ints, int count) override;
//! Sets a constant for the pixel shader based on an index.
bool setPixelShaderConstant(s32 index, const f32* floats, int count) override;
//! Int interface for the above.
bool setPixelShaderConstant(s32 index, const s32* ints, int count) override;
//! Uint interface for the above.
bool setPixelShaderConstant(s32 index, const u32* ints, int count) override;
//! disables all textures beginning with the optional fromStage parameter. Otherwise all texture stages are disabled.
//! Returns whether disabling was successful or not.
bool disableTextures(u32 fromStage=0);
//! Adds a new material renderer to the VideoDriver, using
//! extGLGetObjectParameteriv(shaderHandle, GL_OBJECT_COMPILE_STATUS_ARB, &status)
//! pixel and/or vertex shaders to render geometry.
virtual s32 addShaderMaterial(const c8* vertexShaderProgram, const c8* pixelShaderProgram,
IShaderConstantSetCallBack* callback, E_MATERIAL_TYPE baseMaterial, s32 userData) override;
//! Adds a new material renderer to the VideoDriver, using GLSL to render geometry.
virtual s32 addHighLevelShaderMaterial(
const c8* vertexShaderProgram,
const c8* vertexShaderEntryPointName,
E_VERTEX_SHADER_TYPE vsCompileTarget,
const c8* pixelShaderProgram,
const c8* pixelShaderEntryPointName,
E_PIXEL_SHADER_TYPE psCompileTarget,
const c8* geometryShaderProgram,
const c8* geometryShaderEntryPointName = "main",
E_GEOMETRY_SHADER_TYPE gsCompileTarget = EGST_GS_4_0,
scene::E_PRIMITIVE_TYPE inType = scene::EPT_TRIANGLES,
scene::E_PRIMITIVE_TYPE outType = scene::EPT_TRIANGLE_STRIP,
u32 verticesOut = 0,
IShaderConstantSetCallBack* callback = 0,
E_MATERIAL_TYPE baseMaterial = video::EMT_SOLID,
s32 userData = 0) override;
//! Returns a pointer to the IVideoDriver interface. (Implementation for
//! IMaterialRendererServices)
IVideoDriver* getVideoDriver() override;
//! Returns the maximum amount of primitives (mostly vertices) which
//! the device is able to render with one drawIndexedTriangleList
//! call.
u32 getMaximalPrimitiveCount() const override;
virtual ITexture* addRenderTargetTexture(const core::dimension2d<u32>& size,
const io::path& name, const ECOLOR_FORMAT format = ECF_UNKNOWN) override;
//! Creates a render target texture for a cubemap
ITexture* addRenderTargetTextureCubemap(const irr::u32 sideLen,
const io::path& name, const ECOLOR_FORMAT format) override;
virtual bool setRenderTargetEx(IRenderTarget* target, u16 clearFlag, SColor clearColor = SColor(255,0,0,0),
f32 clearDepth = 1.f, u8 clearStencil = 0) override;
void clearBuffers(u16 flag, SColor color = SColor(255,0,0,0), f32 depth = 1.f, u8 stencil = 0) override;
//! Returns an image created from the last rendered frame.
IImage* createScreenShot(video::ECOLOR_FORMAT format=video::ECF_UNKNOWN, video::E_RENDER_TARGET target=video::ERT_FRAME_BUFFER) override;
//! checks if an OpenGL error has happened and prints it (+ some internal code which is usually the line number)
//! for performance reasons only available in debug mode
bool testGLError(int code=0);
//! Set/unset a clipping plane.
//! There are at least 6 clipping planes available for the user to set at will.
//! \param index: The plane index. Must be between 0 and MaxUserClipPlanes.
//! \param plane: The plane itself.
//! \param enable: If true, enable the clipping plane else disable it.
bool setClipPlane(u32 index, const core::plane3df& plane, bool enable=false) override;
//! Enable/disable a clipping plane.
//! There are at least 6 clipping planes available for the user to set at will.
//! \param index: The plane index. Must be between 0 and MaxUserClipPlanes.
//! \param enable: If true, enable the clipping plane else disable it.
void enableClipPlane(u32 index, bool enable) override;
//! Enable the 2d override material
void enableMaterial2D(bool enable=true) override;
//! Returns the graphics card vendor name.
core::stringc getVendorInfo() override {return VendorName;}
//! Returns the maximum texture size supported.
core::dimension2du getMaxTextureSize() const override;
//! Removes a texture from the texture cache and deletes it, freeing lot of memory.
void removeTexture(ITexture* texture) override;
//! Check if the driver supports creating textures with the given color format
bool queryTextureFormat(ECOLOR_FORMAT format) const override;
//! Used by some SceneNodes to check if a material should be rendered in the transparent render pass
bool needsTransparentRenderPass(const irr::video::SMaterial& material) const override;
//! Convert E_PRIMITIVE_TYPE to OpenGL equivalent
GLenum primitiveTypeToGL(scene::E_PRIMITIVE_TYPE type) const;
//! Convert E_BLEND_FACTOR to OpenGL equivalent
GLenum getGLBlend(E_BLEND_FACTOR factor) const;
//! Get ZBuffer bits.
GLenum getZBufferBits() const;
bool getColorFormatParameters(ECOLOR_FORMAT format, GLint& internalFormat, GLenum& pixelFormat,
GLenum& pixelType, void(**converter)(const void*, s32, void*)) const;
//! Return info about fixed pipeline state.
E_OPENGL_FIXED_PIPELINE_STATE getFixedPipelineState() const;
//! Set info about fixed pipeline state.
void setFixedPipelineState(E_OPENGL_FIXED_PIPELINE_STATE state);
//! Get current material.
const SMaterial& getCurrentMaterial() const;
COpenGLCacheHandler* getCacheHandler() const;
private:
bool updateVertexHardwareBuffer(SHWBufferLink_opengl *HWBuffer);
bool updateIndexHardwareBuffer(SHWBufferLink_opengl *HWBuffer);
void uploadClipPlane(u32 index);
//! inits the parts of the open gl driver used on all platforms
bool genericDriverInit();
ITexture* createDeviceDependentTexture(const io::path& name, IImage* image) override;
ITexture* createDeviceDependentTextureCubemap(const io::path& name, const core::array<IImage*>& image) override;
//! creates a transposed matrix in supplied GLfloat array to pass to OpenGL
inline void getGLMatrix(GLfloat gl_matrix[16], const core::matrix4& m);
inline void getGLTextureMatrix(GLfloat gl_matrix[16], const core::matrix4& m);
//! get native wrap mode value
GLint getTextureWrapMode(const u8 clamp);
//! sets the needed renderstates
void setRenderStates3DMode();
//! sets the needed renderstates
void setRenderStates2DMode(bool alpha, bool texture, bool alphaChannel);
void createMaterialRenderers();
//! Assign a hardware light to the specified requested light, if any
//! free hardware lights exist.
//! \param[in] lightIndex: the index of the requesting light
void assignHardwareLight(u32 lightIndex);
//! helper function for render setup.
void getColorBuffer(const void* vertices, u32 vertexCount, E_VERTEX_TYPE vType);
//! helper function doing the actual rendering.
void renderArray(const void* indexList, u32 primitiveCount,
scene::E_PRIMITIVE_TYPE pType, E_INDEX_TYPE iType);
//! Same as `CacheHandler->setViewport`, but also sets `ViewPort`
virtual void setViewPortRaw(u32 width, u32 height);
COpenGLCacheHandler* CacheHandler;
core::stringw Name;
core::matrix4 Matrices[ETS_COUNT];
core::array<u8> ColorBuffer;
//! enumeration for rendering modes such as 2d and 3d for minizing the switching of renderStates.
enum E_RENDER_MODE
{
ERM_NONE = 0, // no render state has been set yet.
ERM_2D, // 2d drawing rendermode
ERM_3D // 3d rendering mode
};
E_RENDER_MODE CurrentRenderMode;
//! bool to make all renderstates reset if set to true.
bool ResetRenderStates;
bool Transformation3DChanged;
u8 AntiAlias;
SMaterial Material, LastMaterial;
struct SUserClipPlane
{
SUserClipPlane() : Enabled(false) {}
core::plane3df Plane;
bool Enabled;
};
core::array<SUserClipPlane> UserClipPlanes;
core::stringc VendorName;
core::matrix4 TextureFlipMatrix;
//! Color buffer format
ECOLOR_FORMAT ColorFormat;
E_OPENGL_FIXED_PIPELINE_STATE FixedPipelineState;
SIrrlichtCreationParameters Params;
//! Built-in 2D quad for 2D rendering.
S3DVertex Quad2DVertices[4];
static const u16 Quad2DIndices[4];
IContextManager* ContextManager;
};
} // end namespace video
} // end namespace irr
#endif // _IRR_COMPILE_WITH_OPENGL_
#endif