[ICEs.git] / 394889 / s_triangle.i.9

typedef union {
	float f;
	int i;
} fi_type;
static __inline__ int IS_INF_OR_NAN(float x)
{
	fi_type tmp;
	tmp.f = x;
	return !(int)((unsigned int)((tmp.i & 0x7fffffff) - 0x7f800000) >> 31);
}

typedef enum {
	FRAG_ATTRIB_WPOS = 0, FRAG_ATTRIB_COL0 = 1, FRAG_ATTRIB_COL1 =
	    2, FRAG_ATTRIB_FOGC = 3, FRAG_ATTRIB_TEX0 = 4, FRAG_ATTRIB_TEX1 =
	    5, FRAG_ATTRIB_TEX2 = 6, FRAG_ATTRIB_TEX3 = 7, FRAG_ATTRIB_TEX4 =
	    8, FRAG_ATTRIB_TEX5 = 9, FRAG_ATTRIB_TEX6 = 10, FRAG_ATTRIB_TEX7 =
	    11, FRAG_ATTRIB_FACE = 12, FRAG_ATTRIB_PNTC = 13, FRAG_ATTRIB_VAR0 =
	    14, FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + 16)
} gl_frag_result;
typedef enum {
	TEXTURE_BUFFER_INDEX, TEXTURE_2D_ARRAY_INDEX, TEXTURE_1D_ARRAY_INDEX,
	    TEXTURE_CUBE_INDEX, TEXTURE_3D_INDEX, TEXTURE_RECT_INDEX,
	    TEXTURE_2D_INDEX, TEXTURE_1D_INDEX, NUM_TEXTURE_TARGETS
} gl_texture_index;
struct gl_texture_image {
	unsigned int Width;
	unsigned int Height;
	unsigned int WidthLog2;
	void *Data;
};
typedef enum {
	MAX_FACES = 6
} gl_face_index;
struct gl_texture_object {
	int BaseLevel;
	struct gl_texture_image *Image[MAX_FACES][15];
};
struct gl_texture_unit {
	struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
};
struct gl_texture_attrib {
	struct gl_texture_unit Unit[(16 + 16)];
};
struct gl_renderbuffer {
	void (*PutRowRGB) (struct gl_context * ctx, struct gl_renderbuffer * rb,
			   unsigned int count, int x, int y,
			   const void *values);
};
struct gl_framebuffer {
	struct gl_renderbuffer *_ColorDrawBuffers[8];
};
struct gl_context {
	struct gl_framebuffer *DrawBuffer;
	struct gl_texture_attrib Texture;
};
typedef struct {
	float attrib[FRAG_ATTRIB_MAX][4];
} SWvertex;
typedef struct sw_span {
	int x, y;
	unsigned int end;
	float attrStepX[FRAG_ATTRIB_MAX][4];
	int intTex[2], intTexStep[2];
} SWspan;
typedef void (*swrast_tri_func) (struct gl_context * ctx, const SWvertex *,
				 const SWvertex *, const SWvertex *);
typedef struct {
	swrast_tri_func Triangle;
} SWcontext;
static void simple_textured_triangle(struct gl_context *ctx,
				     const SWvertex * v0, const SWvertex * v1,
				     const SWvertex * v2)
{
	typedef struct {
		float dx;
		float dy;
		int fsx;
		int fx0;
		int lines;
	} EdgeT;
	EdgeT eMaj;
	EdgeT eTop;
	EdgeT eBot;
	float oneOverArea;
	const SWvertex *vMin;
	const SWvertex *vMid;
	const SWvertex *vMax;
	const int snapMask = ~(((1 << 11) / (1 << 4)) - 1);
	int vMin_fx;
	int vMin_fy;
	int vMid_fx;
	int vMid_fy;
	int vMax_fx;
	int vMax_fy;
	SWspan span;
	const int fy0 =
	    (((int)
	      ((((v0->attrib[FRAG_ATTRIB_WPOS][1] -
		  0.5F) * ((float)(1 << 11))) >=
		0.0F) ? (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
			  ((float)(1 << 11))) +
			 0.5F) : (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
				   ((float)(1 << 11))) - 0.5F)))) & snapMask;
	const int fy1 =
	    (((int)
	      ((((v1->attrib[FRAG_ATTRIB_WPOS][1] -
		  0.5F) * ((float)(1 << 11))) >=
		0.0F) ? (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
			  ((float)(1 << 11))) +
			 0.5F) : (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
				   ((float)(1 << 11))) - 0.5F)))) & snapMask;
	const int fy2 =
	    (((int)
	      ((((v2->attrib[FRAG_ATTRIB_WPOS][1] -
		  0.5F) * ((float)(1 << 11))) >=
		0.0F) ? (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
			  ((float)(1 << 11))) +
			 0.5F) : (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
				   ((float)(1 << 11))) - 0.5F)))) & snapMask;
	if (fy0 <= fy1) {
		if (fy1 <= fy2) {
			vMin = v0;
			vMax = v1;
			vMin_fy = fy0;
		}
	}
	vMin_fx =
	    (((int)
	      ((((vMin->attrib[FRAG_ATTRIB_WPOS][0] +
		  0.5F) * ((float)(1 << 11))) >=
		0.0F) ? (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
			  ((float)(1 << 11))) +
			 0.5F) : (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
				   ((float)(1 << 11))) - 0.5F)))) & snapMask;
	vMid_fx =
	    (((int)
	      ((((vMid->attrib[FRAG_ATTRIB_WPOS][0] +
		  0.5F) * ((float)(1 << 11))) >=
		0.0F) ? (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
			  ((float)(1 << 11))) +
			 0.5F) : (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
				   ((float)(1 << 11))) - 0.5F)))) & snapMask;
	eMaj.dx = ((vMax_fx - vMin_fx) * (1.0F / ((float)(1 << 11))));
	eMaj.dy = ((vMax_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
	eTop.dx = ((vMax_fx - vMid_fx) * (1.0F / ((float)(1 << 11))));
	eBot.dy = ((vMid_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
	const float area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
	if (IS_INF_OR_NAN(area) || area == 0.0F)
		return;
	oneOverArea = 1.0F / area;
	if (eBot.lines > 0) {
		eBot.fx0 = vMin_fx;
	}
	int scan_from_left_to_right;
	struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
	const struct gl_texture_object *obj =
	    ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
	const struct gl_texture_image *texImg = obj->Image[0][obj->BaseLevel];
	const float twidth = (float)texImg->Width;
	const int twidth_log2 = texImg->WidthLog2;
	const unsigned char *texture = (const unsigned char *)texImg->Data;
	const int smask = texImg->Width - 1;
	const int tmask = texImg->Height - 1;
	if (!rb || !texture) {
		return;
	}
	float eMaj_ds =
	    (vMax->attrib[FRAG_ATTRIB_TEX0][0] -
	     vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
	float eBot_ds =
	    (vMid->attrib[FRAG_ATTRIB_TEX0][0] -
	     vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
	span.attrStepX[FRAG_ATTRIB_TEX0][0] =
	    oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
	span.intTexStep[0] =
	    (((int)
	      ((((span.attrStepX[FRAG_ATTRIB_TEX0][0]) * ((float)(1 << 11))) >=
		0.0F) ? (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
			  ((float)(1 << 11))) +
			 0.5F) : (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
				   ((float)(1 << 11))) - 0.5F))));
	int subTriangle;
	int fxLeftEdge = 0;
	int fxRightEdge = 0;
	int sLeft = 0;
	for (subTriangle = 0; subTriangle <= 1; subTriangle++) {
		EdgeT *eRight;
		int lines;
		if (subTriangle == 0) {
			if (scan_from_left_to_right) {
				eRight = &eBot;
				lines = eRight->lines;
			} else {
				eRight = &eMaj;
			}
		} else {
			if (scan_from_left_to_right) {
				eRight = &eTop;
			}
			fxRightEdge = eRight->fsx - 1;
		}
		while (lines > 0) {
			const int right = fxRightEdge >> 11;
			span.x = fxLeftEdge >> 11;
			if (right <= span.x)
				span.end = 0;
			else
				span.end = right - span.x;
			span.intTex[0] = sLeft;
			if (span.end > 0 && span.y >= 0) {
				unsigned int i;
				unsigned char rgb[16384][3];
				for (i = 0; i < span.end; i++) {
					int s =
					    ((span.intTex[0]) >> 11) & smask;
					int t =
					    ((span.intTex[1]) >> 11) & tmask;
					int pos = (t << twidth_log2) + s;
					rgb[i][0] = texture[pos + 2];
					span.intTex[0] += span.intTexStep[0];
				}
				rb->PutRowRGB(ctx, rb, span.end, span.x, span.y,
					      rgb);
			}
		}
	}
}

void _swrast_choose_triangle(struct gl_context *ctx)
{
	SWcontext *swrast = SWRAST_CONTEXT(ctx);
	swrast->Triangle = simple_textured_triangle;
}
Commit	Line	Data
bd3239d2 MF	1	typedef union {
	2	float f;
	3	int i;
	4	} fi_type;
	5	static __inline__ int IS_INF_OR_NAN(float x)
	6	{
	7	fi_type tmp;
	8	tmp.f = x;
	9	return !(int)((unsigned int)((tmp.i & 0x7fffffff) - 0x7f800000) >> 31);
	10	}
	11
	12	typedef enum {
	13	FRAG_ATTRIB_WPOS = 0, FRAG_ATTRIB_COL0 = 1, FRAG_ATTRIB_COL1 =
	14	2, FRAG_ATTRIB_FOGC = 3, FRAG_ATTRIB_TEX0 = 4, FRAG_ATTRIB_TEX1 =
	15	5, FRAG_ATTRIB_TEX2 = 6, FRAG_ATTRIB_TEX3 = 7, FRAG_ATTRIB_TEX4 =
	16	8, FRAG_ATTRIB_TEX5 = 9, FRAG_ATTRIB_TEX6 = 10, FRAG_ATTRIB_TEX7 =
	17	11, FRAG_ATTRIB_FACE = 12, FRAG_ATTRIB_PNTC = 13, FRAG_ATTRIB_VAR0 =
	18	14, FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + 16)
	19	} gl_frag_result;
	20	typedef enum {
	21	TEXTURE_BUFFER_INDEX, TEXTURE_2D_ARRAY_INDEX, TEXTURE_1D_ARRAY_INDEX,
	22	TEXTURE_CUBE_INDEX, TEXTURE_3D_INDEX, TEXTURE_RECT_INDEX,
	23	TEXTURE_2D_INDEX, TEXTURE_1D_INDEX, NUM_TEXTURE_TARGETS
	24	} gl_texture_index;
	25	struct gl_texture_image {
	26	unsigned int Width;
	27	unsigned int Height;
	28	unsigned int WidthLog2;
	29	void *Data;
	30	};
	31	typedef enum {
	32	MAX_FACES = 6
	33	} gl_face_index;
	34	struct gl_texture_object {
	35	int BaseLevel;
	36	struct gl_texture_image *Image[MAX_FACES][15];
	37	};
	38	struct gl_texture_unit {
	39	struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
	40	};
	41	struct gl_texture_attrib {
	42	struct gl_texture_unit Unit[(16 + 16)];
	43	};
	44	struct gl_renderbuffer {
	45	void (PutRowRGB) (struct gl_context ctx, struct gl_renderbuffer * rb,
	46	unsigned int count, int x, int y,
	47	const void *values);
	48	};
	49	struct gl_framebuffer {
	50	struct gl_renderbuffer *_ColorDrawBuffers[8];
	51	};
	52	struct gl_context {
	53	struct gl_framebuffer *DrawBuffer;
	54	struct gl_texture_attrib Texture;
	55	};
	56	typedef struct {
	57	float attrib[FRAG_ATTRIB_MAX][4];
	58	} SWvertex;
	59	typedef struct sw_span {
	60	int x, y;
	61	unsigned int end;
	62	float attrStepX[FRAG_ATTRIB_MAX][4];
	63	int intTex[2], intTexStep[2];
	64	} SWspan;
65	typedef void (swrast_tri_func) (struct gl_context ctx, const SWvertex *,
66	const SWvertex , const SWvertex );
67	typedef struct {
68	swrast_tri_func Triangle;
69	} SWcontext;
70	static void simple_textured_triangle(struct gl_context *ctx,
71	const SWvertex * v0, const SWvertex * v1,
72	const SWvertex * v2)
73	{
74	typedef struct {
75	float dx;
76	float dy;
77	int fsx;
78	int fx0;
79	int lines;
80	} EdgeT;
81	EdgeT eMaj;
82	EdgeT eTop;
83	EdgeT eBot;
84	float oneOverArea;
85	const SWvertex *vMin;
86	const SWvertex *vMid;
87	const SWvertex *vMax;
88	const int snapMask = ~(((1 << 11) / (1 << 4)) - 1);
89	int vMin_fx;
90	int vMin_fy;
91	int vMid_fx;
92	int vMid_fy;
93	int vMax_fx;
94	int vMax_fy;
95	SWspan span;
96	const int fy0 =
97	(((int)
98	((((v0->attrib[FRAG_ATTRIB_WPOS][1] -
99	0.5F) * ((float)(1 << 11))) >=
100	0.0F) ? (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
101	((float)(1 << 11))) +
102	0.5F) : (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
103	((float)(1 << 11))) - 0.5F)))) & snapMask;
104	const int fy1 =
105	(((int)
106	((((v1->attrib[FRAG_ATTRIB_WPOS][1] -
107	0.5F) * ((float)(1 << 11))) >=
108	0.0F) ? (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
109	((float)(1 << 11))) +
110	0.5F) : (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
111	((float)(1 << 11))) - 0.5F)))) & snapMask;
112	const int fy2 =
113	(((int)
114	((((v2->attrib[FRAG_ATTRIB_WPOS][1] -
115	0.5F) * ((float)(1 << 11))) >=
116	0.0F) ? (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
117	((float)(1 << 11))) +
118	0.5F) : (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
119	((float)(1 << 11))) - 0.5F)))) & snapMask;
120	if (fy0 <= fy1) {
121	if (fy1 <= fy2) {
122	vMin = v0;
123	vMax = v1;
124	vMin_fy = fy0;
125	}
126	}
127	vMin_fx =
128	(((int)
129	((((vMin->attrib[FRAG_ATTRIB_WPOS][0] +
130	0.5F) * ((float)(1 << 11))) >=
131	0.0F) ? (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
132	((float)(1 << 11))) +
133	0.5F) : (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
134	((float)(1 << 11))) - 0.5F)))) & snapMask;
135	vMid_fx =
136	(((int)
137	((((vMid->attrib[FRAG_ATTRIB_WPOS][0] +
138	0.5F) * ((float)(1 << 11))) >=
139	0.0F) ? (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
140	((float)(1 << 11))) +
141	0.5F) : (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
142	((float)(1 << 11))) - 0.5F)))) & snapMask;
143	eMaj.dx = ((vMax_fx - vMin_fx) * (1.0F / ((float)(1 << 11))));
144	eMaj.dy = ((vMax_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
145	eTop.dx = ((vMax_fx - vMid_fx) * (1.0F / ((float)(1 << 11))));
146	eBot.dy = ((vMid_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
147	const float area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
148	if (IS_INF_OR_NAN(area) \|\| area == 0.0F)
149	return;
150	oneOverArea = 1.0F / area;
151	if (eBot.lines > 0) {
152	eBot.fx0 = vMin_fx;
153	}
154	int scan_from_left_to_right;
155	struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
156	const struct gl_texture_object *obj =
157	ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
158	const struct gl_texture_image *texImg = obj->Image[0][obj->BaseLevel];
159	const float twidth = (float)texImg->Width;
160	const int twidth_log2 = texImg->WidthLog2;
161	const unsigned char texture = (const unsigned char )texImg->Data;
162	const int smask = texImg->Width - 1;
163	const int tmask = texImg->Height - 1;
164	if (!rb \|\| !texture) {
165	return;
166	}
167	float eMaj_ds =
168	(vMax->attrib[FRAG_ATTRIB_TEX0][0] -
169	vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
170	float eBot_ds =
171	(vMid->attrib[FRAG_ATTRIB_TEX0][0] -
172	vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
173	span.attrStepX[FRAG_ATTRIB_TEX0][0] =
174	oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
175	span.intTexStep[0] =
176	(((int)
177	((((span.attrStepX[FRAG_ATTRIB_TEX0][0]) * ((float)(1 << 11))) >=
178	0.0F) ? (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
179	((float)(1 << 11))) +
180	0.5F) : (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
181	((float)(1 << 11))) - 0.5F))));
182	int subTriangle;
183	int fxLeftEdge = 0;
184	int fxRightEdge = 0;
185	int sLeft = 0;
186	for (subTriangle = 0; subTriangle <= 1; subTriangle++) {
187	EdgeT *eRight;
188	int lines;
189	if (subTriangle == 0) {
190	if (scan_from_left_to_right) {
191	eRight = &eBot;
192	lines = eRight->lines;
193	} else {
194	eRight = &eMaj;
195	}
196	} else {
197	if (scan_from_left_to_right) {
198	eRight = &eTop;
199	}
200	fxRightEdge = eRight->fsx - 1;
201	}
202	while (lines > 0) {
203	const int right = fxRightEdge >> 11;
204	span.x = fxLeftEdge >> 11;
205	if (right <= span.x)
206	span.end = 0;
207	else
208	span.end = right - span.x;
209	span.intTex[0] = sLeft;
210	if (span.end > 0 && span.y >= 0) {
211	unsigned int i;
212	unsigned char rgb[16384][3];
213	for (i = 0; i < span.end; i++) {
214	int s =
215	((span.intTex[0]) >> 11) & smask;
216	int t =
217	((span.intTex[1]) >> 11) & tmask;
218	int pos = (t << twidth_log2) + s;
219	rgb[i][0] = texture[pos + 2];
220	span.intTex[0] += span.intTexStep[0];
221	}
222	rb->PutRowRGB(ctx, rb, span.end, span.x, span.y,
223	rgb);
224	}
225	}
226	}
227	}
228
229	void _swrast_choose_triangle(struct gl_context *ctx)
230	{
231	SWcontext *swrast = SWRAST_CONTEXT(ctx);
232	swrast->Triangle = simple_textured_triangle;
233	}