X-Git-Url: https://git.wh0rd.org/?p=ICEs.git;a=blobdiff_plain;f=394889%2Fs_triangle.i.16;fp=394889%2Fs_triangle.i.16;h=9c89fc7342117133b7d82563115c91c59f415267;hp=0000000000000000000000000000000000000000;hb=bd3239d2bbe0de3a200b266503e3330b1e391489;hpb=dbff64cb4b7530861c2309c794efdd4e0cf47a23

diff --git a/394889/s_triangle.i.16 b/394889/s_triangle.i.16
new file mode 100644
index 0000000..9c89fc7
--- /dev/null
+++ b/394889/s_triangle.i.16
@@ -0,0 +1,119 @@
+static __inline__ int IS_INF_OR_NAN(float x)
+{
+	union {
+		float f;
+		int i;
+	} tmp;
+	tmp.f = x;
+	return tmp.i;
+}
+
+typedef struct sw_span {
+	int x;
+	int y;
+	int end;
+	float **attrStepX;
+	int intTex[1];
+	int intTexStep[2];
+} SWspan;
+static void simple_textured_triangle( float * * v1)
+{
+	float * *v0;
+	float * *v2;
+	typedef struct {
+		float dx;
+		float dy;
+		int fsx;
+		int fx0;
+		int lines;
+	} EdgeT;
+	EdgeT eMaj;
+	EdgeT eTop;
+	EdgeT eBot;
+	float oneOverArea;
+	float * *vMin;
+	float * *vMid;
+	float * *vMax;
+	int vMin_fx;
+	int vMin_fy;
+	int vMid_fx;
+	int vMid_fy;
+	int vMax_fx;
+	int vMax_fy;
+	SWspan span;
+	 int fy0 = v0[0][1];
+	 int fy1 = v1[0][1];
+	 int fy2 = v2[0][1];
+	if (fy1 <= fy2) {
+		vMin = v0;
+		vMax = v1;
+		vMin_fy = fy0;
+	}
+	vMin_fx = vMin[0][0];
+	vMid_fx = (int)
+	      (vMid[4][0] ? 
+((vMid[4][0] * (float)2048) + 0.5F) : 
+((vMid[4][0] * (float)2048) - 0.5F));
+	eMaj.dx = (vMax_fx - vMin_fx) * (1.0F / (float)2048);
+	eMaj.dy = (vMax_fy - vMin_fy) * (1.0F / (float)2048);
+	eTop.dx = (vMax_fx - vMid_fx) * (1.0F / (float)2048);
+	eBot.dy = (vMid_fy - vMin_fy) * (1.0F / (float)2048);
+	float area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
+	if (IS_INF_OR_NAN(area))
+		return;
+	oneOverArea = 1.0F / area;
+	eBot.fx0 = vMin_fx;
+	int scan_from_left_to_right;
+	void (*PutRowRGB)();
+	char *texture;
+	float eMaj_ds = (vMax[4][0] - vMin[4][0]);
+	float eBot_ds;
+	span.attrStepX[4][0] =
+	    oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+	span.intTexStep[0] =
+	    (int)
+	      ((span.attrStepX[4][0] >=
+		0.0F) ? span.attrStepX[4][0] :
+(span.attrStepX[4][0] * (float)2048) - 0.5F);
+	int subTriangle;
+	int fxRightEdge = 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;
+		}
+		while (lines > 0) {
+			span.x = 0;
+			if (fxRightEdge <= span.x)
+				span.end = 0;
+			else
+				span.end = fxRightEdge - span.x;
+			span.intTex[0] = 0;
+			if (span.end > 0 && span.y >= 0) {
+				int i;
+				char *rgb;
+				for (i = 0; i < span.end; i++) {
+					rgb[i] = texture[span.intTex[0]];
+					span.intTex[0] += span.intTexStep[0];
+				}
+				PutRowRGB(rgb);
+			}
+		}
+	}
+}
+
+void *foo()
+{
+	return simple_textured_triangle;
+}