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[ICEs.git] / 394889 / s_triangle.i.14

diff --git a/394889/s_triangle.i.14 b/394889/s_triangle.i.14
new file mode 100644 (file)
index 0000000..e9be740
--- /dev/null
+++ b/394889/s_triangle.i.14
@@ -0,0 +1,146 @@
+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);
+}
+
+struct gl_texture_image {
+       unsigned int Width;
+       unsigned int Height;
+       void *Data;
+};
+struct gl_renderbuffer {
+       void (*PutRowRGB) ();
+};
+typedef struct {
+       float attrib[30][4];
+} SWvertex;
+typedef struct sw_span {
+       int x; int y;
+       unsigned int end;
+       float attrStepX[30][4];
+       int intTex[2]; int intTexStep[2];
+} SWspan;
+static void simple_textured_triangle(const SWvertex * v1)
+{
+       const SWvertex *v0;
+       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;
+       int vMin_fx;
+       int vMin_fy;
+       int vMid_fx;
+       int vMid_fy;
+       int vMax_fx;
+       int vMax_fy;
+       SWspan span;
+       const int fy0 = v0->attrib[0][1];
+       const int fy1 = v1->attrib[0][1];
+       const int fy2 = v2->attrib[0][1];
+               if (fy1 <= fy2) 
+{
+                       vMin = v0;
+                       vMax = v1;
+                       vMin_fy = fy0;
+               }
+       vMin_fx = vMin->attrib[0][0];
+       vMid_fx = 
+           (((int)
+             ((vMid->attrib[0][0]  >=
+               0) ? ((vMid->attrib[0][0]  * (float)2048
+) +
+                        0.5F) : (((vMid->attrib[0][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));
+       const 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;
+       struct gl_renderbuffer *rb;
+       const struct gl_texture_image *texImg;
+       const float twidth;
+       const int twidth_log2;
+       const unsigned char *texture = texImg->Data;
+       const int smask = texImg->Width;
+       const int tmask = texImg->Height;
+       float eMaj_ds = (vMax->attrib[4][0] - vMin->attrib[4][0]) * twidth;
+       float eBot_ds;
+       span.attrStepX[4][0] =
+           oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+       span.intTexStep[0] = 
+           (((int)
+             ((((span.attrStepX[4][0]) * (float)2048) >=
+               0.0F) ? (((span.attrStepX[4][0]) * (float)2048) +
+                        0.5F) : (((span.attrStepX[4][0]) * (float)2048) -
+                                 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 ;
+               }
+               while (lines > 0) {
+                       const int right = fxRightEdge ;
+                       span.x = 0;
+                       if (right <= span.x)
+                               span.end = 0;
+                       else
+                               span.end = right - span.x;
+                       span.intTex[0] = 0;
+                       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];
+                                       int t = span.intTex[1];
+                                       int pos = (t << twidth_log2)  + s;
+                                       rgb[i][0] = texture[pos ];
+                                       span.intTex[0] += span.intTexStep[0];
+                               }
+                               rb->PutRowRGB(rgb);
+                       }
+               }
+       }
+}
+
+void *foo()
+{
+       return simple_textured_triangle;
+}