summaryrefslogtreecommitdiff
path: root/indra/llrender/llrender.h
blob: a67fb8da522ff130259d44b2e02deb94c4f3eaa8 (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
/** 
 * @file llrender.h
 * @brief LLRender definition
 *
 *	This class acts as a wrapper for OpenGL calls.
 *	The goal of this class is to minimize the number of api calls due to legacy rendering
 *	code, to define an interface for a multiple rendering API abstraction of the UI
 *	rendering, and to abstract out direct rendering calls in a way that is cleaner and easier to maintain.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLGLRENDER_H
#define LL_LLGLRENDER_H

//#include "linden_common.h"

#include "v2math.h"
#include "v3math.h"
#include "v4coloru.h"
#include "v4math.h"
#include "llstrider.h"
#include "llpointer.h"
#include "llglheaders.h"
#include "llmatrix4a.h"
#include "glh/glh_linear.h"

class LLVertexBuffer;
class LLCubeMap;
class LLImageGL;
class LLRenderTarget;
class LLTexture ;

#define LL_MATRIX_STACK_DEPTH 32

class LLTexUnit
{
	friend class LLRender;
public:
	static U32 sWhiteTexture;

	typedef enum
	{
		TT_TEXTURE = 0,			// Standard 2D Texture
		TT_RECT_TEXTURE,	// Non power of 2 texture
		TT_CUBE_MAP,		// 6-sided cube map texture
		TT_MULTISAMPLE_TEXTURE, // see GL_ARB_texture_multisample
		TT_NONE 		// No texture type is currently enabled
	} eTextureType;

	typedef enum
	{
		TAM_WRAP = 0,			// Standard 2D Texture
		TAM_MIRROR,				// Non power of 2 texture
		TAM_CLAMP 				// No texture type is currently enabled
	} eTextureAddressMode;

	typedef enum
	{	// Note: If mipmapping or anisotropic are not enabled or supported it should fall back gracefully
		TFO_POINT = 0,			// Equal to: min=point, mag=point, mip=none.
		TFO_BILINEAR,			// Equal to: min=linear, mag=linear, mip=point.
		TFO_TRILINEAR,			// Equal to: min=linear, mag=linear, mip=linear.
		TFO_ANISOTROPIC			// Equal to: min=anisotropic, max=anisotropic, mip=linear.
	} eTextureFilterOptions;

	typedef enum 
	{
		TB_REPLACE = 0,
		TB_ADD,
		TB_MULT,
		TB_MULT_X2,
		TB_ALPHA_BLEND,
		TB_COMBINE			// Doesn't need to be set directly, setTexture___Blend() set TB_COMBINE automatically
	} eTextureBlendType;

	typedef enum 
	{
		TBO_REPLACE = 0,			// Use Source 1
		TBO_MULT,					// Multiply: ( Source1 * Source2 )
		TBO_MULT_X2,				// Multiply then scale by 2:  ( 2.0 * ( Source1 * Source2 ) )
		TBO_MULT_X4,				// Multiply then scale by 4:  ( 4.0 * ( Source1 * Source2 ) )
		TBO_ADD,					// Add: ( Source1 + Source2 )
		TBO_ADD_SIGNED,				// Add then subtract 0.5: ( ( Source1 + Source2 ) - 0.5 )
		TBO_SUBTRACT,				// Subtract Source2 from Source1: ( Source1 - Source2 )
		TBO_LERP_VERT_ALPHA,		// Interpolate based on Vertex Alpha (VA): ( Source1 * VA + Source2 * (1-VA) )
		TBO_LERP_TEX_ALPHA,			// Interpolate based on Texture Alpha (TA): ( Source1 * TA + Source2 * (1-TA) )
		TBO_LERP_PREV_ALPHA,		// Interpolate based on Previous Alpha (PA): ( Source1 * PA + Source2 * (1-PA) )
		TBO_LERP_CONST_ALPHA,		// Interpolate based on Const Alpha (CA): ( Source1 * CA + Source2 * (1-CA) )
		TBO_LERP_VERT_COLOR			// Interpolate based on Vertex Col (VC): ( Source1 * VC + Source2 * (1-VC) )
										// *Note* TBO_LERP_VERTEX_COLOR only works with setTextureColorBlend(),
										// and falls back to TBO_LERP_VERTEX_ALPHA for setTextureAlphaBlend().
	} eTextureBlendOp;

	typedef enum 
	{
		TBS_PREV_COLOR = 0,			// Color from the previous texture stage
		TBS_PREV_ALPHA,
		TBS_ONE_MINUS_PREV_COLOR,
		TBS_ONE_MINUS_PREV_ALPHA,
		TBS_TEX_COLOR,				// Color from the texture bound to this stage
		TBS_TEX_ALPHA,
		TBS_ONE_MINUS_TEX_COLOR,
		TBS_ONE_MINUS_TEX_ALPHA,
		TBS_VERT_COLOR,				// The vertex color currently set
		TBS_VERT_ALPHA,
		TBS_ONE_MINUS_VERT_COLOR,
		TBS_ONE_MINUS_VERT_ALPHA,
		TBS_CONST_COLOR,			// The constant color value currently set
		TBS_CONST_ALPHA,
		TBS_ONE_MINUS_CONST_COLOR,
		TBS_ONE_MINUS_CONST_ALPHA
	} eTextureBlendSrc;

	LLTexUnit(S32 index);

	// Refreshes renderer state of the texture unit to the cached values
	// Needed when the render context has changed and invalidated the current state
	void refreshState(void);

	// returns the index of this texture unit
	S32 getIndex(void) const { return mIndex; }

	// Sets this tex unit to be the currently active one
	void activate(void); 

	// Enables this texture unit for the given texture type 
	// (automatically disables any previously enabled texture type)
	void enable(eTextureType type); 

	// Disables the current texture unit
	void disable(void);	
	
	// Binds the LLImageGL to this texture unit 
	// (automatically enables the unit for the LLImageGL's texture type)
	bool bind(LLImageGL* texture, bool for_rendering = false, bool forceBind = false);
	bool bind(LLTexture* texture, bool for_rendering = false, bool forceBind = false);

	// Binds a cubemap to this texture unit 
	// (automatically enables the texture unit for cubemaps)
	bool bind(LLCubeMap* cubeMap);

	// Binds a render target to this texture unit 
	// (automatically enables the texture unit for the RT's texture type)
	bool bind(LLRenderTarget * renderTarget, bool bindDepth = false);

	// Manually binds a texture to the texture unit 
	// (automatically enables the tex unit for the given texture type)
	bool bindManual(eTextureType type, U32 texture, bool hasMips = false);
	
	// Unbinds the currently bound texture of the given type 
	// (only if there's a texture of the given type currently bound)
	void unbind(eTextureType type);

	// Sets the addressing mode used to sample the texture
	// Warning: this stays set for the bound texture forever, 
	// make sure you want to permanently change the address mode  for the bound texture.
	void setTextureAddressMode(eTextureAddressMode mode);

	// Sets the filtering options used to sample the texture
	// Warning: this stays set for the bound texture forever, 
	// make sure you want to permanently change the filtering for the bound texture.
	void setTextureFilteringOption(LLTexUnit::eTextureFilterOptions option);

	void setTextureBlendType(eTextureBlendType type);

	inline void setTextureColorBlend(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2 = TBS_PREV_COLOR)
	{ setTextureCombiner(op, src1, src2, false); }

	// NOTE: If *_COLOR enums are passed to src1 or src2, the corresponding *_ALPHA enum will be used instead.
	inline void setTextureAlphaBlend(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2 = TBS_PREV_ALPHA)
	{ setTextureCombiner(op, src1, src2, true); }

	static U32 getInternalType(eTextureType type);

	U32 getCurrTexture(void) { return mCurrTexture; }

	eTextureType getCurrType(void) { return mCurrTexType; }

	void setHasMipMaps(bool hasMips) { mHasMipMaps = hasMips; }

protected:
	const S32			mIndex;
	U32					mCurrTexture;
	eTextureType		mCurrTexType;
	eTextureBlendType	mCurrBlendType;
	eTextureBlendOp		mCurrColorOp;
	eTextureBlendSrc	mCurrColorSrc1;
	eTextureBlendSrc	mCurrColorSrc2;
	eTextureBlendOp		mCurrAlphaOp;
	eTextureBlendSrc	mCurrAlphaSrc1;
	eTextureBlendSrc	mCurrAlphaSrc2;
	S32					mCurrColorScale;
	S32					mCurrAlphaScale;
	bool				mHasMipMaps;
	
	void debugTextureUnit(void);
	void setColorScale(S32 scale);
	void setAlphaScale(S32 scale);
	GLint getTextureSource(eTextureBlendSrc src);
	GLint getTextureSourceType(eTextureBlendSrc src, bool isAlpha = false);
	void setTextureCombiner(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2, bool isAlpha = false);
};

class LLLightState
{
public:
	LLLightState(S32 index);

	void enable();
	void disable();
	void setDiffuse(const LLColor4& diffuse);
	void setAmbient(const LLColor4& ambient);
	void setSpecular(const LLColor4& specular);
	void setPosition(const LLVector4& position);
	void setConstantAttenuation(const F32& atten);
	void setLinearAttenuation(const F32& atten);
	void setQuadraticAttenuation(const F32& atten);
	void setSpotExponent(const F32& exponent);
	void setSpotCutoff(const F32& cutoff);
	void setSpotDirection(const LLVector3& direction);

protected:
	friend class LLRender;

	S32 mIndex;
	bool mEnabled;
	LLColor4 mDiffuse;
	LLColor4 mAmbient;
	LLColor4 mSpecular;
	LLVector4 mPosition;
	LLVector3 mSpotDirection;

	F32 mConstantAtten;
	F32 mLinearAtten;
	F32 mQuadraticAtten;

	F32 mSpotExponent;
	F32 mSpotCutoff;
};

class LLRender
{
	friend class LLTexUnit;
public:

	enum eTexIndex
	{
		DIFFUSE_MAP = 0,
		NORMAL_MAP,
		SPECULAR_MAP,
		NUM_TEXTURE_CHANNELS,
	};
	
	typedef enum {
		TRIANGLES = 0,
		TRIANGLE_STRIP,
		TRIANGLE_FAN,
		POINTS,
		LINES,
		LINE_STRIP,
		QUADS,
		LINE_LOOP,
		NUM_MODES
	} eGeomModes;

	typedef enum 
	{
		CF_NEVER = 0,
		CF_ALWAYS,
		CF_LESS,
		CF_LESS_EQUAL,
		CF_EQUAL,
		CF_NOT_EQUAL,
		CF_GREATER_EQUAL,
		CF_GREATER,
		CF_DEFAULT
	}  eCompareFunc;

	typedef enum 
	{
		BT_ALPHA = 0,
		BT_ADD,
		BT_ADD_WITH_ALPHA,	// Additive blend modulated by the fragment's alpha.
		BT_MULT,
		BT_MULT_ALPHA,
		BT_MULT_X2,
		BT_REPLACE
	} eBlendType;

	typedef enum 
	{
		BF_ONE = 0,
		BF_ZERO,
		BF_DEST_COLOR,
		BF_SOURCE_COLOR,
		BF_ONE_MINUS_DEST_COLOR,
		BF_ONE_MINUS_SOURCE_COLOR,
		BF_DEST_ALPHA,
		BF_SOURCE_ALPHA,
		BF_ONE_MINUS_DEST_ALPHA,
		BF_ONE_MINUS_SOURCE_ALPHA,

		BF_UNDEF
	} eBlendFactor;

	typedef enum
	{
		MM_MODELVIEW = 0,
		MM_PROJECTION,
		MM_TEXTURE0,
		MM_TEXTURE1,
		MM_TEXTURE2,
		MM_TEXTURE3,
		NUM_MATRIX_MODES,
		MM_TEXTURE
	} eMatrixMode;

	LLRender();
	~LLRender();
	void init() ;
	void shutdown();
	
	// Refreshes renderer state to the cached values
	// Needed when the render context has changed and invalidated the current state
	void refreshState(void);

	void translatef(const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void scalef(const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void rotatef(const GLfloat& a, const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void ortho(F32 left, F32 right, F32 bottom, F32 top, F32 zNear, F32 zFar);

	void pushMatrix();
	void popMatrix();
	void loadMatrix(const GLfloat* m);
	void loadIdentity();
	void multMatrix(const GLfloat* m);
	void matrixMode(U32 mode);	
	U32 getMatrixMode();

	const glh::matrix4f& getModelviewMatrix();
	const glh::matrix4f& getProjectionMatrix();

	void syncMatrices();
	void syncLightState();

	void translateUI(F32 x, F32 y, F32 z);
	void scaleUI(F32 x, F32 y, F32 z);
	void pushUIMatrix();
	void popUIMatrix();
	void loadUIIdentity();
	LLVector3 getUITranslation();
	LLVector3 getUIScale();

	void flush();

	void begin(const GLuint& mode);
	void end();
	void vertex2i(const GLint& x, const GLint& y);
	void vertex2f(const GLfloat& x, const GLfloat& y);
	void vertex3f(const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void vertex2fv(const GLfloat* v);
	void vertex3fv(const GLfloat* v);
	
	void texCoord2i(const GLint& x, const GLint& y);
	void texCoord2f(const GLfloat& x, const GLfloat& y);
	void texCoord2fv(const GLfloat* tc);

	void color4ub(const GLubyte& r, const GLubyte& g, const GLubyte& b, const GLubyte& a);
	void color4f(const GLfloat& r, const GLfloat& g, const GLfloat& b, const GLfloat& a);
	void color4fv(const GLfloat* c);
	void color3f(const GLfloat& r, const GLfloat& g, const GLfloat& b);
	void color3fv(const GLfloat* c);
	void color4ubv(const GLubyte* c);

	void diffuseColor3f(F32 r, F32 g, F32 b);
	void diffuseColor3fv(const F32* c);
	void diffuseColor4f(F32 r, F32 g, F32 b, F32 a);
	void diffuseColor4fv(const F32* c);
	void diffuseColor4ubv(const U8* c);
	void diffuseColor4ub(U8 r, U8 g, U8 b, U8 a);

	void vertexBatchPreTransformed(LLVector3* verts, S32 vert_count);
	void vertexBatchPreTransformed(LLVector3* verts, LLVector2* uvs, S32 vert_count);
	void vertexBatchPreTransformed(LLVector3* verts, LLVector2* uvs, LLColor4U*, S32 vert_count);

	void setColorMask(bool writeColor, bool writeAlpha);
	void setColorMask(bool writeColorR, bool writeColorG, bool writeColorB, bool writeAlpha);
	void setSceneBlendType(eBlendType type);

	void setAlphaRejectSettings(eCompareFunc func, F32 value = 0.01f);

	// applies blend func to both color and alpha
	void blendFunc(eBlendFactor sfactor, eBlendFactor dfactor);
	// applies separate blend functions to color and alpha
	void blendFunc(eBlendFactor color_sfactor, eBlendFactor color_dfactor,
		       eBlendFactor alpha_sfactor, eBlendFactor alpha_dfactor);

	LLLightState* getLight(U32 index);
	void setAmbientLightColor(const LLColor4& color);
	
	LLTexUnit* getTexUnit(U32 index);

	U32	getCurrentTexUnitIndex(void) const { return mCurrTextureUnitIndex; }

	bool verifyTexUnitActive(U32 unitToVerify);

	void debugTexUnits(void);

	void clearErrors();

	struct Vertex
	{
		GLfloat v[3];
		GLubyte c[4];
		GLfloat uv[2];
	};

public:
	static U32 sUICalls;
	static U32 sUIVerts;
	static bool sGLCoreProfile;
	
private:
	friend class LLLightState;

	U32 mMatrixMode;
	U32 mMatIdx[NUM_MATRIX_MODES];
	U32 mMatHash[NUM_MATRIX_MODES];
	glh::matrix4f mMatrix[NUM_MATRIX_MODES][LL_MATRIX_STACK_DEPTH];
	U32 mCurMatHash[NUM_MATRIX_MODES];
	U32 mLightHash;
	LLColor4 mAmbientLightColor;
	
	bool			mDirty;
	U32				mQuadCycle;
	U32				mCount;
	U32				mMode;
	U32				mCurrTextureUnitIndex;
	bool				mCurrColorMask[4];
	eCompareFunc			mCurrAlphaFunc;
	F32				mCurrAlphaFuncVal;

	LLPointer<LLVertexBuffer>	mBuffer;
	LLStrider<LLVector3>		mVerticesp;
	LLStrider<LLVector2>		mTexcoordsp;
	LLStrider<LLColor4U>		mColorsp;
	std::vector<LLTexUnit*>		mTexUnits;
	LLTexUnit*			mDummyTexUnit;
	std::vector<LLLightState*> mLightState;

	eBlendFactor mCurrBlendColorSFactor;
	eBlendFactor mCurrBlendColorDFactor;
	eBlendFactor mCurrBlendAlphaSFactor;
	eBlendFactor mCurrBlendAlphaDFactor;

	F32				mMaxAnisotropy;

	std::vector<LLVector3> mUIOffset;
	std::vector<LLVector3> mUIScale;

};

extern F32 gGLModelView[16];
extern F32 gGLLastModelView[16];
extern F32 gGLLastProjection[16];
extern F32 gGLProjection[16];
extern S32 gGLViewport[4];

extern LLRender gGL;

#endif