1 // Copyright (C) 2002-2012 Nikolaus Gebhardt / Thomas Alten
2 // This file is part of the "Irrlicht Engine".
3 // For conditions of distribution and use, see copyright notice in irrlicht.h
4
5 #include "IrrCompileConfig.h"
6 #include "IBurningShader.h"
7
8 #ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
9
10 // compile flag for this file
11 #undef USE_ZBUFFER
12 #undef IPOL_Z
13 #undef CMP_Z
14 #undef WRITE_Z
15
16 #undef IPOL_W
17 #undef CMP_W
18 #undef WRITE_W
19
20 #undef SUBTEXEL
21 #undef INVERSE_W
22
23 #undef IPOL_C0
24 #undef IPOL_T0
25 #undef IPOL_T1
26
27 // define render case
28 #define SUBTEXEL
29 #define INVERSE_W
30
31 #define USE_ZBUFFER
32 #define IPOL_W
33 #define CMP_W
34 #define WRITE_W
35
36
37 //#define IPOL_C0
38 #define IPOL_T0
39 //#define IPOL_T1
40
41 // apply global override
42 #ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
43 #undef INVERSE_W
44 #endif
45
46 #ifndef SOFTWARE_DRIVER_2_SUBTEXEL
47 #undef SUBTEXEL
48 #endif
49
50 #if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
51 #ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
52 #undef IPOL_W
53 #endif
54 #define IPOL_Z
55
56 #ifdef CMP_W
57 #undef CMP_W
58 #define CMP_Z
59 #endif
60
61 #ifdef WRITE_W
62 #undef WRITE_W
63 #define WRITE_Z
64 #endif
65
66 #endif
67
68
69 namespace irr
70 {
71
72 namespace video
73 {
74
75 class CTRTextureWire2 : public IBurningShader
76 {
77 public:
78
79 //! constructor
80 CTRTextureWire2(CBurningVideoDriver* driver);
81
82 //! draws an indexed triangle list
83 virtual void drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c );
84 virtual void drawLine ( const s4DVertex *a,const s4DVertex *b);
85
86
87
88 private:
89 void renderAlphaLine ( const s4DVertex *a,const s4DVertex *b ) const;
90 void renderLine ( const s4DVertex *a,const s4DVertex *b ) const;
91
92 };
93
94 //! constructor
CTRTextureWire2(CBurningVideoDriver * driver)95 CTRTextureWire2::CTRTextureWire2(CBurningVideoDriver* driver)
96 : IBurningShader(driver)
97 {
98 #ifdef _DEBUG
99 setDebugName("CTRTextureWire2");
100 #endif
101 }
102
103
104 // swap integer with xor
swap_xor(s32 & a,s32 & b)105 static inline void swap_xor ( s32 &a, s32 &b )
106 {
107 a ^= b;
108 b ^= a;
109 a ^= b;
110 }
111
112
113 /*!
114 */
renderLine(const s4DVertex * a,const s4DVertex * b) const115 void CTRTextureWire2::renderLine ( const s4DVertex *a,const s4DVertex *b ) const
116 {
117
118 int pitch0 = RenderTarget->getDimension().Width << VIDEO_SAMPLE_GRANULARITY;
119 int pitch1 = RenderTarget->getDimension().Width << 2;
120
121 int aposx = (int) a->Pos.x;
122 int aposy = (int) a->Pos.y;
123 int bposx = (int) b->Pos.x;
124 int bposy = (int) b->Pos.y;
125
126 int dx = bposx - aposx;
127 int dy = bposy - aposy;
128
129 int c;
130 int m;
131 int d = 0;
132 int run;
133
134 tVideoSample *dst;
135 #ifdef USE_ZBUFFER
136 fp24 *z;
137 #endif
138
139 int xInc0 = 1 << VIDEO_SAMPLE_GRANULARITY;
140 int yInc0 = pitch0;
141
142 int xInc1 = 4;
143 int yInc1 = pitch1;
144
145 tVideoSample color;
146
147 #ifdef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
148 tFixPoint r0, g0, b0;
149 getSample_color ( r0, g0, b0, a->Color[0] );
150 color = fix_to_color ( r0, g0, b0 );
151 #else
152 color = (tVideoSample) 0xFFFFFFFF;
153 #endif
154
155 if ( dx < 0 )
156 {
157 xInc0 = - ( 1 << VIDEO_SAMPLE_GRANULARITY);
158 xInc1 = -4;
159 dx = -dx;
160 }
161
162 if ( dy > dx )
163 {
164 swap_xor ( dx, dy );
165 swap_xor ( xInc0, yInc0 );
166 swap_xor ( xInc1, yInc1 );
167 }
168
169 if ( 0 == dx )
170 return;
171
172 dst = (tVideoSample*) ( (u8*) (tVideoSample*)RenderTarget->lock() + ( aposy * pitch0 ) + (aposx << VIDEO_SAMPLE_GRANULARITY ) );
173 #ifdef USE_ZBUFFER
174 z = (fp24*) ( (u8*) (fp24*) DepthBuffer->lock() + ( aposy * pitch1 ) + (aposx << 2 ) );
175 #endif
176
177 c = dx << 1;
178 m = dy << 1;
179
180 #ifdef IPOL_Z
181 f32 slopeZ = (b->Pos.z - a->Pos.z) / f32(dx);
182 f32 dataZ = a->Pos.z;
183 #endif
184
185 #ifdef IPOL_W
186 fp24 slopeW = (b->Pos.w - a->Pos.w) / f32( dx );
187 fp24 dataW = a->Pos.w;
188 #endif
189
190 run = dx;
191 while ( run )
192 {
193 #ifdef CMP_Z
194 if ( *z >= dataZ )
195 #endif
196 #ifdef CMP_W
197 if ( dataW >= *z )
198 #endif
199 {
200 #ifdef WRITE_Z
201 *z = dataZ;
202 #endif
203 #ifdef WRITE_W
204 *z = dataW;
205 #endif
206
207 *dst = color;
208
209 }
210
211 dst = (tVideoSample*) ( (u8*) dst + xInc0 ); // x += xInc
212 #ifdef IPOL_Z
213 z = (fp24*) ( (u8*) z + xInc1 );
214 #endif
215 #ifdef IPOL_W
216 z = (fp24*) ( (u8*) z + xInc1 );
217 #endif
218
219 d += m;
220 if ( d > dx )
221 {
222 dst = (tVideoSample*) ( (u8*) dst + yInc0 ); // y += yInc
223 #ifdef IPOL_Z
224 z = (fp24*) ( (u8*) z + yInc1 );
225 #endif
226 #ifdef IPOL_W
227 z = (fp24*) ( (u8*) z + yInc1 );
228 #endif
229
230 d -= c;
231 }
232 run -= 1;
233 #ifdef IPOL_Z
234 dataZ += slopeZ;
235 #endif
236 #ifdef IPOL_W
237 dataW += slopeW;
238 #endif
239
240 }
241
242 }
243
drawTriangle(const s4DVertex * a,const s4DVertex * b,const s4DVertex * c)244 void CTRTextureWire2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
245 {
246 sScanLineData line;
247
248 // sort on height, y
249 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
250 if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
251 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
252
253 renderLine ( a, b );
254 renderLine ( b, c );
255 renderLine ( a, c );
256
257 }
258
259
drawLine(const s4DVertex * a,const s4DVertex * b)260 void CTRTextureWire2::drawLine ( const s4DVertex *a,const s4DVertex *b)
261 {
262
263 // query access to TexMaps
264
265 // sort on height, y
266 if ( a->Pos.y > b->Pos.y ) swapVertexPointer(&a, &b);
267
268 renderLine ( a, b );
269
270 }
271
272
273 } // end namespace video
274 } // end namespace irr
275
276 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
277
278 namespace irr
279 {
280 namespace video
281 {
282
283
284 //! creates a flat triangle renderer
createTriangleRendererTextureGouraudWire2(CBurningVideoDriver * driver)285 IBurningShader* createTriangleRendererTextureGouraudWire2(CBurningVideoDriver* driver)
286 {
287 #ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
288 return new CTRTextureWire2(driver);
289 #else
290 return 0;
291 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
292 }
293
294
295 } // end namespace video
296 } // end namespace irr
297
298
299