13 static inline void PetscImageSetClip(PetscImage img, int x, int y, int w, int h)  in PetscImageSetClip()  argument
16   img->clip[1] = PetscClipInterval(y, 0, img->h - 1); /* ymin   */  in PetscImageSetClip()
18   img->clip[3] = PetscClipInterval(y + h, 0, img->h); /* ymax+1 */  in PetscImageSetClip()
24   int y, ys = img->clip[1], ye = img->clip[3];  in PetscImageClear()  local
25   for (y = ys; y < ye; y++)  in PetscImageClear()
26     for (x = xs; x < xe; x++) img->buffer[y * img->w + x] = 0;  in PetscImageClear()
29 static inline void PetscImageDrawPixel(PetscImage img, int x, int y, int c)  in PetscImageDrawPixel()  argument
32   if (y < img->clip[1] || y >= img->clip[3]) return;  in PetscImageDrawPixel()
33   img->buffer[y * img->w + x] = (unsigned char)c;  in PetscImageDrawPixel()
75 static inline void PetscImageDrawRectangle(PetscImage img, int x, int y, int w, int h, int c)  in PetscImageDrawRectangle()  argument
78   int ys = PetscMax(y, img->clip[1]), ye = PetscMin(y + h, img->clip[3]);  in PetscImageDrawRectangle()
80   for (y = ys; y < ye; y++)  in PetscImageDrawRectangle()
81     for (x = xs; x < xe; x++) img->buffer[y * img->w + x] = (unsigned char)c;  in PetscImageDrawRectangle()
87   int x, y, s, a2 = w * w, b2 = h * h;  in PetscImageDrawEllipse()  local
88   for (x = 0, y = h, s = 2 * b2 + a2 * (1 - 2 * h); b2 * x <= a2 * y; x++) {  in PetscImageDrawEllipse()
89     PetscImageDrawLine(img, xc + x, yc + y, xc - x, yc + y, c);  in PetscImageDrawEllipse()
90     PetscImageDrawLine(img, xc + x, yc - y, xc - x, yc - y, c);  in PetscImageDrawEllipse()
92       s += 4 * a2 * (1 - y);  in PetscImageDrawEllipse()
93       y--;  in PetscImageDrawEllipse()
97   for (x = w, y = 0, s = 2 * a2 + b2 * (1 - 2 * w); a2 * y <= b2 * x; y++) {  in PetscImageDrawEllipse()
98     PetscImageDrawLine(img, xc + x, yc + y, xc - x, yc + y, c);  in PetscImageDrawEllipse()
99     PetscImageDrawLine(img, xc + x, yc - y, xc - x, yc - y, c);  in PetscImageDrawEllipse()
104     s += a2 * ((4 * y) + 6);  in PetscImageDrawEllipse()
115   int       lc, rc = 0, lx, rx = 0, xx, y, c;  in PetscImageDrawTriangle()  local
163   for (y = y_1; y <= y_2; y++) {  in PetscImageDrawTriangle()
166     lfrac = ((float)(y - y_1)) * R_y2_y1;  in PetscImageDrawTriangle()
170     rfrac = ((float)(y - y_1)) * R_y3_y1;  in PetscImageDrawTriangle()
179         PetscImageDrawPixel(img, xx, y, c);  in PetscImageDrawTriangle()
184         PetscImageDrawPixel(img, xx, y, c);  in PetscImageDrawTriangle()
188       PetscImageDrawPixel(img, lx, y, c);  in PetscImageDrawTriangle()
207   for (y = y_2; y <= y_3; y++) {  in PetscImageDrawTriangle()
210     lfrac = ((float)(y - y_2)) * R_y3_y2;  in PetscImageDrawTriangle()
214     rfrac = ((float)(y - y_1)) * R_y3_y1;  in PetscImageDrawTriangle()
223         PetscImageDrawPixel(img, xx, y, c);  in PetscImageDrawTriangle()
228         PetscImageDrawPixel(img, xx, y, c);  in PetscImageDrawTriangle()
232       PetscImageDrawPixel(img, lx, y, c);  in PetscImageDrawTriangle()
338 static inline void PetscImageDrawText(PetscImage img, int x, int y, int c, const char text[])  in PetscImageDrawText()  argument
345 …Bitmap[chr - 32][i] & (1 << (tw - 1 - j))) PetscImageDrawPixel(img, x + j + k * tw, y + i - th, c);  in PetscImageDrawText()