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
#pragma once
#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;
//! 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 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 char *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;
//! 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 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 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::stringc Name;
core::matrix4 Matrices[ETS_COUNT];
core::array<u8> ColorBuffer;
//! enumeration for rendering modes such as 2d and 3d for minimizing 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_