+#ifdef USE_GL
+void render_gl_gradient(Surface *sf, int x, int y, int w, int h)
+{
+ float pr,pg,pb;
+ float sr, sg, sb;
+ float ar, ag, ab;
+
+ pr = (float)sf->data.planar.primary->r/255.0;
+ pg = (float)sf->data.planar.primary->g/255.0;
+ pb = (float)sf->data.planar.primary->b/255.0;
+ if (sf->data.planar.secondary) {
+ sr = (float)sf->data.planar.secondary->r/255.0;
+ sg = (float)sf->data.planar.secondary->g/255.0;
+ sb = (float)sf->data.planar.secondary->b/255.0;
+ }
+ switch (sf->data.planar.grad) {
+ case Background_Solid: /* already handled */
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glVertex2i(x+w, y);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glVertex2i(x, y+h);
+ glVertex2i(x, y);
+ glEnd();
+ return;
+ case Background_Horizontal:
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w, y);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y+h);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_Vertical:
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glVertex2i(x+w, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glVertex2i(x, y+h);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_Diagonal:
+ ar = (pr + sr) / 2.0;
+ ag = (pg + sg) / 2.0;
+ ab = (pb + sb) / 2.0;
+ glBegin(GL_TRIANGLES);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x, y);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w, y+h);
+
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x, y+h);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_CrossDiagonal:
+ ar = (pr + sr) / 2.0;
+ ag = (pg + sg) / 2.0;
+ ab = (pb + sb) / 2.0;
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w, y+h);
+
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w, y+h);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x, y+h);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_Pyramid:
+ ar = (pr + sr) / 2.0;
+ ag = (pg + sg) / 2.0;
+ ab = (pb + sb) / 2.0;
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x, y+h/2);
+
+ glVertex2i(x, y+h/2);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y+h);
+
+ glVertex2i(x, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w/2, y+h);
+
+ glVertex2i(x+w/2, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w, y+h/2);
+
+ glVertex2i(x+w, y+h/2);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y);
+
+ glVertex2i(x+w, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(ar, ag, ab);
+ glVertex2i(x+w/2, y);
+
+ glVertex2i(x+w/2, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_PipeCross:
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glVertex2i(x, y+h/2);
+
+ glVertex2i(x, y+h/2);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y+h);
+
+ glVertex2i(x, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glVertex2i(x+w/2, y+h);
+
+ glVertex2i(x+w/2, y+h);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glVertex2i(x+w, y+h/2);
+
+ glVertex2i(x+w, y+h/2);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y);
+
+ glVertex2i(x+w, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glVertex2i(x+w/2, y);
+
+ glVertex2i(x+w/2, y);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glEnd();
+ break;
+ case Background_Rectangle:
+ glBegin(GL_TRIANGLES);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y+h);
+
+ glVertex2i(x, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y+h);
+
+ glVertex2i(x+w, y+h);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x+w, y);
+
+ glVertex2i(x+w, y);
+ glColor3f(sr, sg, sb);
+ glVertex2i(x+w/2, y+h/2);
+ glColor3f(pr, pg, pb);
+ glVertex2i(x, y);
+
+ glEnd();
+ break;
+ default:
+ g_message("unhandled gradient");
+ return;
+ }
+}
+#endif /* USE_GL */