aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/libraries/irrlicht-1.8/source/Irrlicht/COpenGLDriver.h
blob: 09da7097a4d427c18f9cab60b45f838d505ef10e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
// 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 "CNullDriver.h"
#include "IMaterialRendererServices.h"
// also includes the OpenGL stuff
#include "COpenGLExtensionHandler.h"

#ifdef _IRR_COMPILE_WITH_CG_
#include "Cg/cg.h"
#endif

namespace irr
{

namespace video
{
	class COpenGLTexture;

	class COpenGLDriver : public CNullDriver, public IMaterialRendererServices, public COpenGLExtensionHandler
	{
		friend class COpenGLTexture;
	public:

		#ifdef _IRR_COMPILE_WITH_WINDOWS_DEVICE_
		COpenGLDriver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, CIrrDeviceWin32* device);
		//! inits the windows specific parts of the open gl driver
		bool initDriver(CIrrDeviceWin32* device);
		bool changeRenderContext(const SExposedVideoData& videoData, CIrrDeviceWin32* device);
		#endif

		#ifdef _IRR_COMPILE_WITH_X11_DEVICE_
		COpenGLDriver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, CIrrDeviceLinux* device);
		//! inits the GLX specific parts of the open gl driver
		bool initDriver(CIrrDeviceLinux* device);
		bool changeRenderContext(const SExposedVideoData& videoData, CIrrDeviceLinux* device);
		#endif

		#ifdef _IRR_COMPILE_WITH_SDL_DEVICE_
		COpenGLDriver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, CIrrDeviceSDL* device);
		#endif

		#ifdef _IRR_COMPILE_WITH_OSX_DEVICE_
		COpenGLDriver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, CIrrDeviceMacOSX *device);
		#endif

		//! generic version which overloads the unimplemented versions
		bool changeRenderContext(const SExposedVideoData& videoData, void* device) {return false;}

		//! destructor
		virtual ~COpenGLDriver();

		//! clears the zbuffer
		virtual bool beginScene(bool backBuffer=true, bool zBuffer=true,
				SColor color=SColor(255,0,0,0),
				const SExposedVideoData& videoData=SExposedVideoData(),
				core::rect<s32>* sourceRect=0);

		//! presents the rendered scene on the screen, returns false if failed
		virtual bool endScene();

		//! sets transformation
		virtual void setTransform(E_TRANSFORMATION_STATE state, const core::matrix4& mat);


		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
		virtual bool updateHardwareBuffer(SHWBufferLink *HWBuffer);

		//! Create hardware buffer from mesh
		virtual SHWBufferLink *createHardwareBuffer(const scene::IMeshBuffer* mb);

		//! Delete hardware buffer (only some drivers can)
		virtual void deleteHardwareBuffer(SHWBufferLink *HWBuffer);

		//! Draw hardware buffer
		virtual void drawHardwareBuffer(SHWBufferLink *HWBuffer);

		//! Create occlusion query.
		/** Use node for identification and mesh for occlusion test. */
		virtual void addOcclusionQuery(scene::ISceneNode* node,
				const scene::IMesh* mesh=0);

		//! Remove occlusion query.
		virtual void removeOcclusionQuery(scene::ISceneNode* node);

		//! 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. */
		virtual void runOcclusionQuery(scene::ISceneNode* node, bool visible=false);

		//! 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 */
		virtual void updateOcclusionQuery(scene::ISceneNode* node, bool block=true);

		//! 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. */
		virtual u32 getOcclusionQueryResult(scene::ISceneNode* node) const;

		//! 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);

		//! 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);

		//! queries the features of the driver, returns true if feature is available
		virtual bool queryFeature(E_VIDEO_DRIVER_FEATURE feature) const
		{
			return FeatureEnabled[feature] && COpenGLExtensionHandler::queryFeature(feature);
		}

		//! Sets a material. All 3d drawing functions draw geometry now
		//! using this material.
		//! \param material: Material to be used from now on.
		virtual void setMaterial(const SMaterial& material);

		//! 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);

		//! draws an 2d image, using a color (if color is other then Color(255,255,255,255)) and the alpha channel of the texture if wanted.
		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);

		//! 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 draw2DImage(const video::ITexture* texture,
				const core::position2d<s32>& pos,
				const core::array<core::rect<s32> >& sourceRects,
				const core::array<s32>& indices,
				const core::rect<s32>* clipRect=0,
				SColor color=SColor(255,255,255,255),
				bool useAlphaChannelOfTexture=false);

		//! Draws a part of the texture into the rectangle.
		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);

		//! draw an 2d rectangle
		virtual void draw2DRectangle(SColor color, const core::rect<s32>& pos,
			const core::rect<s32>* clip = 0);

		//!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);

		//! Draws a 2d line.
		virtual void draw2DLine(const core::position2d<s32>& start,
					const core::position2d<s32>& end,
					SColor color=SColor(255,255,255,255));

		//! Draws a single pixel
		virtual void drawPixel(u32 x, u32 y, const SColor & color);

		//! Draws a 3d line.
		virtual void draw3DLine(const core::vector3df& start,
					const core::vector3df& end,
					SColor color = SColor(255,255,255,255));

		//! \return Returns the name of the video driver. Example: In case of the Direct3D8
		//! driver, it would return "Direct3D8.1".
		virtual const wchar_t* getName() const;

		//! deletes all dynamic lights there are
		virtual void deleteAllDynamicLights();

		//! adds a dynamic light, returning an index to the light
		//! \param light: the light data to use to create the light
		//! \return An index to the light, or -1 if an error occurs
		virtual s32 addDynamicLight(const SLight& light);

		//! Turns a dynamic light on or off
		//! \param lightIndex: the index returned by addDynamicLight
		//! \param turnOn: true to turn the light on, false to turn it off
		virtual void turnLightOn(s32 lightIndex, bool turnOn);

		//! returns the maximal amount of dynamic lights the device can handle
		virtual u32 getMaximalDynamicLightAmount() const;

		//! 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.
		virtual void setAmbientLight(const SColorf& color);

		//! 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.
		virtual void drawStencilShadowVolume(const core::array<core::vector3df>& triangles, bool zfail, u32 debugDataVisible=0);

		//! 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));

		//! sets a viewport
		virtual void setViewPort(const core::rect<s32>& area);

		//! Sets the fog mode.
		virtual void setFog(SColor color, E_FOG_TYPE fogType, f32 start,
			f32 end, f32 density, bool pixelFog, bool rangeFog);

		//! Only used by the internal engine. Used to notify the driver that
		//! the window was resized.
		virtual void OnResize(const core::dimension2d<u32>& size);

		//! Returns type of video driver
		virtual E_DRIVER_TYPE getDriverType() const;

		//! get color format of the current color buffer
		virtual ECOLOR_FORMAT getColorFormat() const;

		//! Returns the transformation set by setTransform
		virtual const core::matrix4& getTransform(E_TRANSFORMATION_STATE state) const;

		//! Can be called by an IMaterialRenderer to make its work easier.
		virtual void setBasicRenderStates(const SMaterial& material, const SMaterial& lastmaterial,
			bool resetAllRenderstates);

		//! Sets a vertex shader constant.
		virtual void setVertexShaderConstant(const f32* data, s32 startRegister, s32 constantAmount=1);

		//! Sets a pixel shader constant.
		virtual void setPixelShaderConstant(const f32* data, s32 startRegister, s32 constantAmount=1);

		//! Sets a constant for the vertex shader based on a name.
		virtual bool setVertexShaderConstant(const c8* name, const f32* floats, int count);

		//! Bool interface for the above.
		virtual bool setVertexShaderConstant(const c8* name, const bool* bools, int count);

		//! Int interface for the above.
		virtual bool setVertexShaderConstant(const c8* name, const s32* ints, int count);

		//! Sets a constant for the pixel shader based on a name.
		virtual bool setPixelShaderConstant(const c8* name, const f32* floats, int count);

		//! Bool interface for the above.
		virtual bool setPixelShaderConstant(const c8* name, const bool* bools, int count);

		//! Int interface for the above.
		virtual bool setPixelShaderConstant(const c8* name, const s32* ints, int count);

		//! sets the current Texture
		//! Returns whether setting was a success or not.
		bool setActiveTexture(u32 stage, const video::ITexture* texture);

		//! 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);

		//! 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,
				E_GPU_SHADING_LANGUAGE shadingLang = EGSL_DEFAULT);

		//! Returns a pointer to the IVideoDriver interface. (Implementation for
		//! IMaterialRendererServices)
		virtual IVideoDriver* getVideoDriver();

		//! Returns the maximum amount of primitives (mostly vertices) which
		//! the device is able to render with one drawIndexedTriangleList
		//! call.
		virtual u32 getMaximalPrimitiveCount() const;

		virtual ITexture* addRenderTargetTexture(const core::dimension2d<u32>& size,
				const io::path& name, const ECOLOR_FORMAT format = ECF_UNKNOWN);

		//! set or reset render target
		virtual bool setRenderTarget(video::E_RENDER_TARGET target, bool clearTarget,
					bool clearZBuffer, SColor color);

		//! set or reset render target texture
		virtual bool setRenderTarget(video::ITexture* texture, bool clearBackBuffer,
					bool clearZBuffer, SColor color);

		//! Sets multiple render targets
		virtual bool setRenderTarget(const core::array<video::IRenderTarget>& texture,
			bool clearBackBuffer=true, bool clearZBuffer=true, SColor color=SColor(0,0,0,0));

		//! Clears the ZBuffer.
		virtual void clearZBuffer();

		//! Returns an image created from the last rendered frame.
		virtual IImage* createScreenShot(video::ECOLOR_FORMAT format=video::ECF_UNKNOWN, video::E_RENDER_TARGET target=video::ERT_FRAME_BUFFER);

		//! checks if an OpenGL error has happend and prints it
		//! for performance reasons only available in debug mode
		bool testGLError();

		//! 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.
		virtual bool setClipPlane(u32 index, const core::plane3df& plane, bool enable=false);

		//! 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.
		virtual void enableClipPlane(u32 index, bool enable);

		//! Enable the 2d override material
		virtual void enableMaterial2D(bool enable=true);

		//! Returns the graphics card vendor name.
		virtual core::stringc getVendorInfo() {return VendorName;}

		//! Returns the maximum texture size supported.
		virtual core::dimension2du getMaxTextureSize() const;

		ITexture* createDepthTexture(ITexture* texture, bool shared=true);
		void removeDepthTexture(ITexture* texture);

		//! Removes a texture from the texture cache and deletes it, freeing lot of memory.
		void removeTexture(ITexture* texture);

		//! 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;

		//! Get Cg context
		#ifdef _IRR_COMPILE_WITH_CG_
		const CGcontext& getCgContext();
		#endif

	private:

		//! clears the zbuffer and color buffer
		void clearBuffers(bool backBuffer, bool zBuffer, bool stencilBuffer, SColor color);

		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();
		//! returns a device dependent texture from a software surface (IImage)
		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData);

		//! 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);

		//! Set GL pipeline to desired texture wrap modes of the material
		void setWrapMode(const SMaterial& material);

		//! 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);

		// returns the current size of the screen or rendertarget
		virtual const core::dimension2d<u32>& getCurrentRenderTargetSize() const;

		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);

		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;
		COpenGLTexture* RenderTargetTexture;
		core::array<video::IRenderTarget> MRTargets;
		class STextureStageCache
		{
			const ITexture* CurrentTexture[MATERIAL_MAX_TEXTURES];
		public:
			STextureStageCache()
			{
				for (u32 i=0; i<MATERIAL_MAX_TEXTURES; ++i)
				{
					CurrentTexture[i] = 0;
				}
			}

			~STextureStageCache()
			{
				clear();
			}

			void set(u32 stage, const ITexture* tex)
			{
				if (stage<MATERIAL_MAX_TEXTURES)
				{
					const ITexture* oldTexture=CurrentTexture[stage];
					if (tex)
						tex->grab();
					CurrentTexture[stage]=tex;
					if (oldTexture)
						oldTexture->drop();
				}
			}

			const ITexture* operator[](int stage) const
			{
				if ((u32)stage<MATERIAL_MAX_TEXTURES)
					return CurrentTexture[stage];
				else
					return 0;
			}

			void remove(const ITexture* tex)
			{
				for (s32 i = MATERIAL_MAX_TEXTURES-1; i>= 0; --i)
				{
					if (CurrentTexture[i] == tex)
					{
						tex->drop();
						CurrentTexture[i] = 0;
					}
				}
			}

			void clear()
			{
				// Drop all the CurrentTexture handles
				for (u32 i=0; i<MATERIAL_MAX_TEXTURES; ++i)
				{
					if (CurrentTexture[i])
					{
						CurrentTexture[i]->drop();
						CurrentTexture[i] = 0;
					}
				}
			}
		};
		STextureStageCache CurrentTexture;
		core::array<ITexture*> DepthTextures;
		struct SUserClipPlane
		{
			SUserClipPlane() : Enabled(false) {}
			core::plane3df Plane;
			bool Enabled;
		};
		core::array<SUserClipPlane> UserClipPlanes;

		core::dimension2d<u32> CurrentRendertargetSize;

		core::stringc VendorName;

		core::matrix4 TextureFlipMatrix;

		//! Color buffer format
		ECOLOR_FORMAT ColorFormat;

		//! Render target type for render operations
		E_RENDER_TARGET CurrentTarget;

		SIrrlichtCreationParameters Params;

		//! All the lights that have been requested; a hardware limited
		//! number of them will be used at once.
		struct RequestedLight
		{
			RequestedLight(SLight const & lightData)
				: LightData(lightData), HardwareLightIndex(-1), DesireToBeOn(true) { }

			SLight	LightData;
			s32	HardwareLightIndex; // GL_LIGHT0 - GL_LIGHT7
			bool	DesireToBeOn;
		};
		core::array<RequestedLight> RequestedLights;

		#ifdef _IRR_WINDOWS_API_
			HDC HDc; // Private GDI Device Context
			HWND Window;
		#ifdef _IRR_COMPILE_WITH_WINDOWS_DEVICE_
			CIrrDeviceWin32 *Win32Device;
		#endif
		#endif
		#ifdef _IRR_COMPILE_WITH_X11_DEVICE_
			GLXDrawable Drawable;
			Display* X11Display;
			CIrrDeviceLinux *X11Device;
		#endif
		#ifdef _IRR_COMPILE_WITH_OSX_DEVICE_
			CIrrDeviceMacOSX *OSXDevice;
		#endif
		#ifdef _IRR_COMPILE_WITH_SDL_DEVICE_
			CIrrDeviceSDL *SDLDevice;
		#endif
		#ifdef _IRR_COMPILE_WITH_CG_
		CGcontext CgContext;
		#endif

		E_DEVICE_TYPE DeviceType;
	};

} // end namespace video
} // end namespace irr


#endif // _IRR_COMPILE_WITH_OPENGL_
#endif